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Journal articles on the topic 'Compact X-ray sources'

Author: Grafiati

Published: 3 June 2025

Last updated: 31 July 2025

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1

McCray, Richard. "Compact Binary X-Ray Sources." International Astronomical Union Colloquium 89 (1986): 184–97. http://dx.doi.org/10.1017/s0252921100086085.

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AbstractCompact binary X-ray sources include white dwarfs, neutron stars, and black holes that are accreting matter from a companion star. The X-ray emission from these systems is produced by the accreting matter as it flows through an accretion disk and strikes the surface of the compact object. The emitting regions have opacities dominated by electron scattering, and radiation pressure is likely to play an important role in the hydrodynamics. Strong magnetic fields greatly modify the hydrodynamics and radiation transfer in the pulsating neutron star sources. Accretion disks have complex stru

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2

Kylafis, Nick D. "Jets from Compact X-ray Sources." Proceedings of the International Astronomical Union 5, H15 (2009): 266–67. http://dx.doi.org/10.1017/s1743921310009142.

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AbstractJets have been observed from both neutron stars and black holes in binary X-ray sources. The neutron star jets are typically 30 times weaker than the black-hole ones. Thus, the second have been studied more extensively. Contrary to common belief, jets from compact X-ray sources are not simply “fireworks” that emit radio waves. I will demonstrate that they play a central role in the observed phenomena in both neutron star and black-hole systems. In particular, for black-hole jets, a simple jet model can explain the very stringent correlations that have been found between the power-law X

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3

Tanaka, Y. "Observations of Compact X-Ray Sources." International Astronomical Union Colloquium 89 (1986): 198–221. http://dx.doi.org/10.1017/s0252921100086097.

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This paper reviews the present status of observations of compact X-ray sources with emphasis on the aspects related to radiation hydrodynamics, based on the recent observational results, in particular those from the Japanese X-ray astronomy satellite Tenma. The main feature of Tenma is a large-area gas scintillation proportional counters (GSPC) with energy resolution twice that of ordinary proportional counters, which can yield information on energy spectrum superior in quality to previous results. We shall deal here only with those galactic X-ray sources in which the compact object is a neutr

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Hooker, Simon, Katsumi Midorikawa, and James Rosenzweig. "Special issue on compact x-ray sources." Journal of Physics B: Atomic, Molecular and Optical Physics 47, no. 23 (2014): 230301. http://dx.doi.org/10.1088/0953-4075/47/23/230301.

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Hooker, Simon, Katsumi Midorikawa, and James Rosenzweig. "Special issue on compact x-ray sources." Journal of Physics B: Atomic, Molecular and Optical Physics 47, no. 7 (2014): 070401. http://dx.doi.org/10.1088/0953-4075/47/7/070401.

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6

Hertz, Paul. "Low Luminosity Globular Cluster X-Ray Sources." Symposium - International Astronomical Union 126 (1988): 685–86. http://dx.doi.org/10.1017/s0074180900043618.

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Two classes of globular cluster X-ray sources are known. Each consists of compact objects accreting material from a close binary companion. The brighter class has a neutron star primary, and the low luminosity class has a white dwarf primary. These sources formed by tidal capture of the compact object by a main sequence dwarf in the core of the globular cluster. Their presence and number has implications on the end points of stellar evolution in globular clusters and on the formation of binaries in cluster cores.

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Eggl, Elena, Martin Dierolf, Klaus Achterhold, et al. "The Munich Compact Light Source: initial performance measures." Journal of Synchrotron Radiation 23, no. 5 (2016): 1137–42. http://dx.doi.org/10.1107/s160057751600967x.

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While large-scale synchrotron sources provide a highly brilliant monochromatic X-ray beam, these X-ray sources are expensive in terms of installation and maintenance, and require large amounts of space due to the size of storage rings for GeV electrons. On the other hand, laboratory X-ray tube sources can easily be implemented in laboratories or hospitals with comparatively little cost, but their performance features a lower brilliance and a polychromatic spectrum creates problems with beam hardening artifacts for imaging experiments. Over the last decade, compact synchrotron sources based on

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8

Feidenhans'l, R. K. "NEW METHODS FOR X-RAY IMAGING USING COMPACT SYNCHROTRON X-RAY SOURCES." Radiotherapy and Oncology 92 (August 2009): S126—S127. http://dx.doi.org/10.1016/s0167-8140(12)72921-3.

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9

Knulst, W., J. Luiten, and J. Verhoeven. "Compact High-Brightness Soft X-Ray Cherenkov Sources." IEEE Journal of Selected Topics in Quantum Electronics 10, no. 6 (2004): 1414–25. http://dx.doi.org/10.1109/jstqe.2004.837738.

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Assoufid, Lahsen, Uwe Arp, Patrick Naulleau, Sandra Biedron, and William Graves. "Compact X-ray and Extreme-Ultraviolet Light Sources." Optics and Photonics News 26, no. 7 (2015): 40. http://dx.doi.org/10.1364/opn.26.7.000040.

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11

Barcons, X. "Compact X-Ray Sources: Strong Gravity at Work." EAS Publications Series 30 (2008): 39–49. http://dx.doi.org/10.1051/eas:0830004.

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12

Tao, Lian, Hua Feng, Fabien Grisé, and Philip Kaaret. "COMPACT OPTICAL COUNTERPARTS OF ULTRALUMINOUS X-RAY SOURCES." Astrophysical Journal 737, no. 2 (2011): 81. http://dx.doi.org/10.1088/0004-637x/737/2/81.

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13

Colbert, Edward J. M., and Richard F. Mushotzky. "Compact X-ray sources in nearby galaxy nuclei." Advances in Space Research 23, no. 5-6 (1999): 847–50. http://dx.doi.org/10.1016/s0273-1177(99)00231-8.

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14

Worrall, D. M. "X-Ray Properties of Compact Extragalactic Radio Sources." Symposium - International Astronomical Union 129 (1988): 109–10. http://dx.doi.org/10.1017/s0074180900134163.

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A good correlation is known to exist between the X-ray and radio luminosity of flat-spectrum, core-dominated radio sources (e.g., Owen, Helfand and Spangler 1981). Worrall (1987) presents a logarithmic plot of spectral luminosity in the source frame at 2 keV versus that at 5 GHz for a variety of QSOs, Highly Polarized QSOs (HPQs), and BL Lac Objects. Friedmann cosmology with Ho = 100h km s−1 Mpc−1, qo = 0 is assumed. Exclusion of objects which are optically or X-ray selected, or in which the radio emission is not dominated by a flat-spectrum compact core, gives a sub-sample consisting of 50 QS

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Worrall, D. M., and B. J. Wilkes. "X-ray spectra of compact extragalactic radio sources." Astrophysical Journal 360 (September 1990): 396. http://dx.doi.org/10.1086/169130.

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16

Pouvesle, J. M., C. Cachoncinlle, R. Viladrosa, E. Robert, and A. Khacef. "Compact flash X-ray sources and their applications." Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms 113, no. 1-4 (1996): 134–40. http://dx.doi.org/10.1016/0168-583x(95)01408-x.

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17

Mezcua, M., and A. P. Lobanov. "Compact radio emission in Ultraluminous X-ray sources." Astronomische Nachrichten 332, no. 4 (2011): 379–83. http://dx.doi.org/10.1002/asna.201011504.

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18

Grindlay, Jonathan E. "X-Raying the Dynamics of Globular Clusters." Symposium - International Astronomical Union 113 (1985): 43–61. http://dx.doi.org/10.1017/s0074180900147205.

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Recent studies of the x-ray sources in globular clusters have provided important new clues for both the dynamical processes in clusters and the stellar content and evolution of globular clusters. Very deep x-ray images of several globular clusters show evidence for diffuse x-ray emission from hot gas which may be related by a simple shock model to properties of both the cluster, such as its orbit in the Galaxy, and the interstellar medium in the halo of the Galaxy. The x-ray surveys conducted with the Einstein Observatory are reviewed and the results derived for the luminosity function, masses

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Koyama, Katsuji, and Masayoshi Nobukawa. "Origin and Composition of the Galactic Diffuse X-Ray Emission Spectra by Unresolved X-Ray Sources." Astrophysical Journal 961, no. 2 (2024): 205. http://dx.doi.org/10.3847/1538-4357/ad0dff.

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Abstract Galactic diffuse X-ray emission (GDXE) can be spatially segmented into Galactic center X-ray emission (GCXE), Galactic ridge X-ray emission (GRXE), and Galactic bulge X-ray emission (GBXE). The X-ray spectra of GDXE are expressed by the assembly of compact X-ray sources, which are either white dwarfs (WDs) or X-ray active stars consisting of binaries with late-type stars. WDs have either a strong magnetic field or a weak magnetic field. WDs and X-ray active stars are collectively called compact X-ray stars. However, spectral fittings by the assembly of all compact X-ray stars for GCXE

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Kallman, T. R. "Theory of Accretion Disk Coronae." International Astronomical Union Colloquium 115 (1990): 187–96. http://dx.doi.org/10.1017/s025292110001232x.

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AbstractAccretion disk coronae are likely to be the dominant site for X-ray absorption and reprocessed emission in low mass X-ray binaries, and may be present in other classes of compact X-ray sources such as active galactic nuclei and cataclysmic variables. In spite of this fact, and in spite of the observational evidence for their existence, there remain many uncertainties about the structure of accretion disk coronae. This paper will discuss the coronal structure and dynamics, their X-ray spectral signatures including coupling to the variability behavior of compact X-ray sources, and the ma

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21

Chen, Steven, Oleg Kargaltsev, Hui Yang, et al. "Population of X-Ray Sources in the Intermediate-age Cluster NGC 3532: a Test Bed for Machine-learning Classification." Astrophysical Journal 948, no. 1 (2023): 59. http://dx.doi.org/10.3847/1538-4357/acb3a6.

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Abstract Open clusters are thought to be the birthplace of most stars in the galaxy. Thus, they are excellent laboratories for investigating stellar evolution, and X-ray properties of various types of stars (including binary stars, evolved stars, and compact objects). In this work, we investigate the population of X-ray sources in the nearby 300 Myr old open cluster NGC 3532 using Chandra X-ray Observatory and multiwavelength data from several surveys. We apply a random-forest machine-learning pipeline (MUWCLASS) to classify all confidently detected X-ray sources (signal-to-noise ratio, hereaf

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Siemiginowska, Aneta, Thomas L. Aldcroft, Jill Bechtold, Gianfranco Brunetti, Martin Elvis, and Carlo Stanghellini. "X-ray Emission from Gigahertz Peaked/Compact Steep Spectrum Sources." Publications of the Astronomical Society of Australia 20, no. 1 (2003): 113–17. http://dx.doi.org/10.1071/as02052.

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AbstractThe high spatial resolution of the Chandra X-ray Observatory allows us to study the environment of GPS/CSS sources to within an arcsec of the strong compact core. We present the discovery of X-ray jets in two GPS quasars, PKS1127–145 and B2 0738+313, indicating that X-ray emission associated with the relativistic plasma is present at large distances from the GPS nucleus. We also discuss first results from Chandra observations of our GPS/CSS sample. We find that six out of ten sources show intrinsic absorption at a level which may be sufficient to confine the GPS source.

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Ł. Król, Dominika, Małgosia Sobolewska, Łukasz Stawarz, et al. "On the Origin of the X-Ray Emission in Heavily Obscured Compact Radio Sources." Astrophysical Journal 966, no. 2 (2024): 201. http://dx.doi.org/10.3847/1538-4357/ad3632.

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Abstract X-ray continuum emission of active galactic nuclei (AGNs) may be reflected by circumnuclear dusty tori, producing prominent fluorescence iron lines at X-ray frequencies. Here, we discuss the broadband emission of three radio-loud AGNs belonging to the class of compact symmetric objects (CSOs), with detected narrow Fe Kα lines. CSOs have newly born radio jets, forming compact radio lobes with projected linear sizes of the order of a few to hundreds of parsecs. We model the radio-to-γ-ray spectra of compact lobes in J1407+2827, J1511+0518, and J2022+6137, which are among the nearest and

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24

Kulpe, Stephanie, Martin Dierolf, Benedikt Günther, et al. "Spectroscopic imaging at compact inverse Compton X-ray sources." Physica Medica 79 (November 2020): 137–44. http://dx.doi.org/10.1016/j.ejmp.2020.11.015.

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25

Najmudin, Z., S. Kneip, M. S. Bloom, et al. "Compact laser accelerators for X-ray phase-contrast imaging." Philosophical Transactions of the Royal Society A: Mathematical, Physical and Engineering Sciences 372, no. 2010 (2014): 20130032. http://dx.doi.org/10.1098/rsta.2013.0032.

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Advances in X-ray imaging techniques have been driven by advances in novel X-ray sources. The latest fourth-generation X-ray sources can boast large photon fluxes at unprecedented brightness. However, the large size of these facilities means that these sources are not available for everyday applications. With advances in laser plasma acceleration, electron beams can now be generated at energies comparable to those used in light sources, but in university-sized laboratories. By making use of the strong transverse focusing of plasma accelerators, bright sources of betatron radiation have been pr

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26

Montez, Rodolfo. "X-ray Studies of Planetary Nebulae." Proceedings of the International Astronomical Union 12, S323 (2016): 104–8. http://dx.doi.org/10.1017/s1743921317000965.

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AbstractX-ray emission from planetary nebulae (PNe) provides unique insight on the formation and evolution of PNe. Past observations and the ongoing Chandra Planetary Nebulae Survey (ChanPlaNS) provide a consensus on the two types of X-ray emission detected from PNe: extended and compact point-like sources. Extended X-ray emission arises from a shocked “hot bubble” plasma that resides within the nebular shell. Cooler than expected hot bubble plasma temperatures spurred a number of potential solutions with one emerging as the likely dominate process. The origin of X-ray emission from compact so

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Rodriguez, Jaimee-Ian. "Parametric X-ray methods use 2D heterostructures to generate compact, tunable X-ray sources." Scilight 2021, no. 28 (2021): 281103. http://dx.doi.org/10.1063/10.0005660.

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28

Podsiadlowski, Ph, S. Rappaport, and E. Pfahl. "Binaries with Compact Components: Theoretical and Observational Challenges." International Astronomical Union Colloquium 194 (July 2004): 97–100. http://dx.doi.org/10.1017/s0252921100152066.

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AbstractWe report on recent progress in our theoretical understanding of X-ray binaries, which has largely been driven by new observations, and illustrate the interplay between theory and observations considering as examples intermediate-mass X-ray binaries, irradiation-driven evolution, ultraluminous X-ray sources and neutron stars with low-velocity kicks.

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Rodriguez, Antonio C. "From Active Stars to Black Holes: A Discovery Tool for Galactic X-Ray Sources." Publications of the Astronomical Society of the Pacific 136, no. 5 (2024): 054201. http://dx.doi.org/10.1088/1538-3873/ad357c.

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Abstract Galactic X-ray sources are diverse, ranging from active M dwarfs to compact object binaries, and everything in between. The X-ray landscape of today is rich, with point source catalogs such as those from XMM-Newton, Chandra, and Swift, each with ≳105 sources and growing. Furthermore, X-ray astronomy is on the verge of being transformed through data releases from the all-sky SRG/eROSITA survey. Many X-ray sources can be associated with an optical counterpart, which in the era of Gaia, can be determined to be Galactic or extragalactic through parallax and proper motion information. Here

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Cash, Webster. "X-ray Interferometry." Symposium - International Astronomical Union 205 (2001): 457–62. http://dx.doi.org/10.1017/s0074180900221761.

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X-rays have tremendous potential for imaging at the highest angular resulution. The high surface brightness of many x-ray sources will reveal angular scales heretofore thought unreachable. The short wavelengths make instrumentation compact and baselines short. We discuss how practical x-ray interferometers can be built for astronomy using existing technology. We describe the Maxim Pathfinder and Maxim missions which will achieve 100 and 0.1 micro-arcsecond imaging respectively. The science to be tackled with resolution of up to one million times that of HST will be outlined, with emphasis on e

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Apparao, Krishna M. V., and S. P. Tarafdar. "Effect of Compact Objects Near Be Stars." International Astronomical Union Colloquium 92 (August 1987): 516–18. http://dx.doi.org/10.1017/s0252921100116720.

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Several Be stars are identified with bright X-ray sources. (Rappaport and Van den Heuvel, 1982). The bright X-ray emission and observed periodicities indicate the existence of compact objects (white dwarfs, neutron stars or black holes) near the Be stars. A prime example is the brightest X-ray source A0538-66 in LMC, which contains a neutron star with a rotation period of 59 ms. Apparao (1985) explained the X-ray emission, which occurs in periodic flares, by considering an inclined eccentric orbit for the neutron star around the assumed Be-star. The neutron star when it enters a gas ring (arou

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Fabbiano, G. "Ultraluminous X-Ray Sources: an Observational Review." International Astronomical Union Colloquium 194 (July 2004): 46–49. http://dx.doi.org/10.1017/s0252921100151863.

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AbstractUltraluminous X-ray Sources (ULXs) are, as suggested by their name, extremely luminous and rare X-ray emitting objects found in galaxies. Because of their luminosity, it has been suggested that they may be powered by accretion onto a black hole (BH) of a few 100 M⊙, more massive than what one would expect to originate from normal stellar evolution. Alternative models include young supernova remnants (SNRs) beamed emission from normal BH X-ray binaries (XRB) with high accretion rates, and relativistically beamed XRB omission. The observational evidence on ULXs suggests that while most o

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Miyamoto, Takuya, Fumitaka Tachinami, Toru, Takashi Kikuchi, and Nob Harada. "Developments of compact pulsed-power system toward X-ray sources." EPJ Web of Conferences 59 (2013): 10002. http://dx.doi.org/10.1051/epjconf/20135910002.

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Chen, Wen-Cong, Dong-Dong Liu, and Bo Wang. "Detectability of Ultra-compact X-Ray Binaries as LISA Sources." Astrophysical Journal 900, no. 1 (2020): L8. http://dx.doi.org/10.3847/2041-8213/abae66.

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Qiu, Yanli, and Hua Feng. "Constraining Soft and Hard X-Ray Irradiation in Ultraluminous X-Ray Sources." Astrophysical Journal 922, no. 2 (2021): 91. http://dx.doi.org/10.3847/1538-4357/ac3569.

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Abstract Most ultraluminous X-ray sources (ULXs) are argued to be powered by supercritical accretion onto compact objects. One of the key questions regarding these objects is whether or not the hard X-rays are geometrically beamed toward the symmetric axis. We propose testing the scenario using disk irradiation to see how much the outer accretion disk sees the central hard X-rays. We collect a sample of 11 bright ULXs with an identification of a unique optical counterpart, and model their optical fluxes considering two irradiating sources: soft X-rays from the photosphere of the optically thic

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Günther, Benedikt, Martin Dierolf, Klaus Achterhold, and Franz Pfeiffer. "Device for source position stabilization and beam parameter monitoring at inverse Compton X-ray sources." Journal of Synchrotron Radiation 26, no. 5 (2019): 1546–53. http://dx.doi.org/10.1107/s1600577519006453.

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Compact X-ray sources based on inverse Compton scattering provide brilliant and partially coherent X-rays in a laboratory environment. The cross section for inverse Compton scattering is very small, requiring high-power laser systems as well as small laser and electron beam sizes at the interaction point to generate sufficient flux. Therefore, these systems are very sensitive to distortions which change the overlap between the two beams. In order to monitor X-ray source position, size and flux in parallel to experiments, the beam-position monitor proposed here comprises a small knife edge whos

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Done, C., G. Ghisellini, and A. C. Fabian. "Pair loading in compact sources." Monthly Notices of the Royal Astronomical Society 245, no. 1 (1990): 1. http://dx.doi.org/10.1093/mnras/245.1.1.

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Summary We investigate the effects of a re-acceleration mechanism in compact sources where electron-positron pair production is important. The pairs increase the number of particles to be accelerated and decrease the mean particle energy if the source luminosity remains constant. The acceleration mechanism is loaded. Models in which this effect is included reproduce the γ-ray break seen in active galactic nuclei. It is mainly due to the reduced particle energy and not to photon-photon absorption. The X-ray spectra are generally flatter than those observed if the electrons are accelerated to a

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Pavlov, George G., Divas Sanwal, and Marcus A. Teter. "Central Compact Objects in Supernova Remnants." Symposium - International Astronomical Union 218 (2004): 239–46. http://dx.doi.org/10.1017/s0074180900181069.

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There are point-like sources in central regions of several supernova remnants which have not been detected outside the X-ray range. The X-ray spectra of these Central Compact Objects (CCOs) have thermal components with blackbody temperatures of 0.2–0.5 keV and characteristic sizes of 0.3-3 km. Most likely, the CCOs are neutron stars born in supernova explosions. We overview their observational properties, emphasizing the Chandra data, and compare them with magnetars.

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Ma, Chen-Hsun, Kwan-Lok Li, You-Hua Chu, and Albert K. H. Kong. "Chandra Observation of NGC 1559: Eight Ultraluminous X-Ray Sources Including a Compact Binary Candidate." Astrophysical Journal 956, no. 1 (2023): 41. http://dx.doi.org/10.3847/1538-4357/aced04.

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Abstract Despite the 30 yr history of ultraluminous X-ray sources (ULXs) studies, issues such as the majority of their physical natures (i.e., neutron stars, stellar-mass black holes, or intermediate black holes) as well as the accretion mechanisms are still under debate. Expanding the ULX sample size in the literature is clearly a way to help. To this end, we investigated the X-ray source population, ULXs in particular, in the barred spiral galaxy NGC 1559 using a Chandra observation made in 2016. In this 45 ks exposure, 33 X-ray point sources were detected within the 2.′7 isophotal radius of

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Hellings, Paul. "The Average X-Ray Lifetime of Massive X-Ray Binaries." Symposium - International Astronomical Union 116 (1986): 383–84. http://dx.doi.org/10.1017/s0074180900149198.

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Massive X-ray binaries may be powered by two mechanisms generating X-radiation: accretion of stellar wind material of the O-star, or Roche lobe overflow (RLOF). The evolution of RLOF powered X-ray binaries has been studied by Savonije (1978). For massive binaries the duration of the RLOF powered stage is less than 100 years for binaries evolving through case B of mass transfer, and 5000 to 10 000 years for case A. On this basis Savonije concluded that the majority of the X-ray binaries should evolve through case A of mass transfer, in order to explain the observed number of active sources in m

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Wachulak, Przemyslaw, Alfio Torrisi, Mesfin Ayele, et al. "Nanoimaging using soft X-ray and EUV laser-plasma sources." EPJ Web of Conferences 167 (2018): 03001. http://dx.doi.org/10.1051/epjconf/201816703001.

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In this work we present three experimental, compact desk-top imaging systems: SXR and EUV full field microscopes and the SXR contact microscope. The systems are based on laser-plasma EUV and SXR sources based on a double stream gas puff target. The EUV and SXR full field microscopes, operating at 13.8 nm and 2.88 nm wavelengths are capable of imaging nanostructures with a sub-50 nm spatial resolution and short (seconds) exposure times. The SXR contact microscope operates in the “water-window” spectral range and produces an imprint of the internal structure of the imaged sample in a thin layer

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Ali, M., E. Bonnett, P. Karataev, A. Kubankin, O. Oleinik, and V. Margaryan. "Identification of material by X-ray fluorescence analysis with a pyroelectric X-ray generator." Journal of Instrumentation 19, no. 07 (2024): C07003. http://dx.doi.org/10.1088/1748-0221/19/07/c07003.

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Abstract By changing the temperature of Lithium Tantalate (LiTaO3) single crystal at moderate vacuum conditions leads to generation of strong electric field. The uncompensated polarization during the heating or cooling of the crystal causes the ejection of electrons from either the dielectric layer on the surface of the crystal or from a metal target depending on the polarity. The electrons are accelerated and gain energy of up to 100 keV. The energy of these electrons can be determined by measuring the end-point energy of the X-ray spectrum that resulted from the electron interactions with th

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Eggl, Elena, Simone Schleede, Martin Bech, et al. "X-ray phase-contrast tomography with a compact laser-driven synchrotron source." Proceedings of the National Academy of Sciences 112, no. 18 (2015): 5567–72. http://dx.doi.org/10.1073/pnas.1500938112.

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Between X-ray tubes and large-scale synchrotron sources, a large gap in performance exists with respect to the monochromaticity and brilliance of the X-ray beam. However, due to their size and cost, large-scale synchrotrons are not available for more routine applications in small and medium-sized academic or industrial laboratories. This gap could be closed by laser-driven compact synchrotron light sources (CLS), which use an infrared (IR) laser cavity in combination with a small electron storage ring. Hard X-rays are produced through the process of inverse Compton scattering upon the intersec

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Cho, Adrian. "Laser-powered accelerators, compact and cheap, get real." Science 387, no. 6733 (2025): 459–60. https://doi.org/10.1126/science.adw3509.

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Grindlay, Jonathan E. "X-Ray Binaries in Globular Clusters." Symposium - International Astronomical Union 126 (1988): 347–66. http://dx.doi.org/10.1017/s0074180900042595.

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X-ray binaries in globular clusters provide a powerful tool for the exploration of the evolution of compact binaries and their host globular clusters. Recent x-ray and optical studies of these systems have yielded long-sought binary periods and fundamental properties for two sources (in NGC 6624 and M 15). It appears that tidal capture formation of compact binaries in globular clusters can proceed by several different routes and lead to exotic systems such as the white dwarf-neutron star binary with an 11-minute period recently discovered in NGC 6624. Combined with previously reported long-ter

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Schields, Paul J., David M. Gibson, Walter M. Gibson, Ning Gao, Huapeng Huang, and Igor Yu Ponomarev. "Overview of polycapillary X-ray optics." Powder Diffraction 17, no. 2 (2002): 70–80. http://dx.doi.org/10.1154/1.1482080.

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Polycapillary optics are utilized in a wide variety of applications and are integral components in many state of the art instruments. Polycapillary optics operate by collecting X-rays and efficiently propagating them by total external reflection to form focused and parallel beams. We discuss the general parameters for designing these optics and provide specific examples on balancing the interrelations of beam flux, source size, focal spot-size, and beam divergence. The development of compact X-ray sources with characteristics tailored to match the requirements of polycapillary optics allows su

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Yang, Jun, Daniel R. Wik, Bret D. Lehmer, et al. "Young Black Hole and Neutron Star Systems in the Nearby Star-forming Galaxy M33: The NuSTAR View." Astrophysical Journal 930, no. 1 (2022): 64. http://dx.doi.org/10.3847/1538-4357/ac6351.

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Abstract We can learn about the formation and evolution of compact objects, such as neutron stars and black holes (BHs), by studying the X-ray emission from accreting systems in nearby star-forming galaxies. The hard (E > 10 keV) X-ray emission in particular allows strong discrimination among the accretion states and compact object types. We conducted a NuSTAR survey (∼600 ks) of the Local Group spiral galaxy M33 to study the distribution of X-ray binary (XRB) accretors in an actively star-forming environment. We constructed color–intensity and color–color diagrams to infer XRB accretion st

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Suvorov, A. G. "Ultra-compact X-ray binaries as dual-line gravitational-wave sources." Monthly Notices of the Royal Astronomical Society 503, no. 4 (2021): 5495–503. http://dx.doi.org/10.1093/mnras/stab825.

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ABSTRACT By virtue of their sub-hour orbital periods, ultra-compact X-ray binaries are promising sources for the space-borne gravitational-wave interferometers LISA, Taiji, and TianQin. Some of these systems contain a neutron star primary, whose spin period can be measured directly via pulse timing, or indirectly through rotational modulations of burst phenomena. It is pointed out here that since actively accreting stars, with spin frequencies in the hundreds of Hz, may continuously emit appreciable gravitational waves due to the presence of accretion-built mountains, toroidal magnetic fields,

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Chen, Wen-Cong. "Compact Intermediate-mass Black Hole X-Ray Binaries: Potential LISA Sources?" Astrophysical Journal 896, no. 2 (2020): 129. http://dx.doi.org/10.3847/1538-4357/ab9017.

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Fabian, A. C., R. D. Blandford, P. W. Guilbert, E. S. Phinney, and L. Cuellar. "Pair-induced spectral changes and variability in compact X-ray sources." Monthly Notices of the Royal Astronomical Society 221, no. 4 (1986): 931–45. http://dx.doi.org/10.1093/mnras/221.4.931.

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