Relevant bibliographies by topics / Hot Stellar Atmospheres

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  1. Journal articles
  2. Dissertations / Theses
  3. Books
  4. Book chapters

Academic literature on the topic 'Hot Stellar Atmospheres'

Author: Grafiati
Published: 4 June 2021
Last updated: 10 February 2022

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Journal articles on the topic "Hot Stellar Atmospheres"

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Baxter, Claire, Jean-Michel Désert, Vivien Parmentier, et al. "A transition between the hot and the ultra-hot Jupiter atmospheres." Astronomy & Astrophysics 639 (July 2020): A36. http://dx.doi.org/10.1051/0004-6361/201937394.

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A key hypothesis in the field of exoplanet atmospheres is the trend of atmospheric thermal structure with planetary equilibrium temperature. We explore this trend and report here the first statistical detection of a transition in the near-infrared atmospheric emission between hot and ultra-hot Jupiters. We measure this transition using secondary eclipse observations and interpret this phenomenon as changes in atmospheric properties, and more specifically in terms of transition from non-inverted to inverted thermal profiles. We examine a sample of 78 hot Jupiters with secondary eclipse measurem
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Rauch, T., J. L. Deetjen, S. Dreizler, and K. Werner. "NLTE Model Atmospheres for Extremely Hot Compact Stars." Symposium - International Astronomical Union 195 (2000): 423–24. http://dx.doi.org/10.1017/s0074180900163387.

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Present observational techniques provide stellar spectra with high resolution at a high signal-to-noise ratio over the complete wavelength range—from the far infrared to X-rays.The effects of Non-“Local Thermal Equilibrium” (NLTE) are particularly important for hot stars, hence the use of reliable NLTE stellar model atmosphere fluxes is required for an adequate spectral analysis.State-of-the-art NLTE model atmospheres include metal-line blanketing of millions of lines of all elements from hydrogen up to the iron-group elements, and thus permit precise analyses of extremely hot compact stars, e
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Dreizler, Stefan, and Sonja L. Schuh. "Stratified NLTE Model Atmospheres for Hot Stars." Symposium - International Astronomical Union 210 (2003): 33–43. http://dx.doi.org/10.1017/s0074180900133224.

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In most stellar atmosphere models, a homogeneous chemical composition is assumed, which is a good approximation for many stars. With the absence of convection and mass–loss, however, gravitational settling can produce a chemical stratification gradient. Typical examples are white dwarfs. In hot stars this diffusion process is modified by the radiative acceleration, resulting in levitation of ions with large radiative cross sections. The status of our program for self-consistent stratified non-LTE model atmospheres is presented.
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Aret, A., A. Sapar, R. Poolamäe, and L. Sapar. "SMART – a computer program for modelling stellar atmospheres." Proceedings of the International Astronomical Union 4, S252 (2008): 41–42. http://dx.doi.org/10.1017/s1743921308022394.

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AbstractProgram SMART (Spectra and Model Atmospheres by Radiative Transfer) has been composed for modelling atmospheres and spectra of hot stars (O, B and A spectral classes) and studying different physical processes in them (Sapar & Poolaäe 2003, Sapar et al. 2007). Line-blanketed models are computed assuming plane-parallel, static and horizontally homogeneous atmosphere in radiative, hydrostatic and local thermodynamic equilibrium. Main advantages of SMART are its shortness, simplicity, user friendliness and flexibility for study of different physical processes. SMART successfully runs o
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Shulyak, D., L. M. Lara, M. Rengel, and N. E. Nèmec. "Stellar impact on disequilibrium chemistry and observed spectra of hot Jupiter atmospheres." Astronomy & Astrophysics 639 (July 2020): A48. http://dx.doi.org/10.1051/0004-6361/201937210.

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Aims. We study the effect of disequilibrium processes (photochemistry and vertical transport) on mixing ratio profiles of neutral species and on the simulated spectra of a hot Jupiter exoplanet that orbits stars of various spectral types. We additionally address the impact of stellar activity that should be present, to various degrees, in all stars with convective envelopes. Methods. We used the VULCAN chemical kinetic code to compute number densities of species in irradiated planetary atmospheres. The temperature-pressure profile of the atmosphere was computed with the HELIOS code. We also ut
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Odert, P., N. V. Erkaev, K. G. Kislyakova та ін. "Modeling the Lyα transit absorption of the hot Jupiter HD 189733b". Astronomy & Astrophysics 638 (червень 2020): A49. http://dx.doi.org/10.1051/0004-6361/201834814.

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Context. Hydrogen-dominated atmospheres of hot exoplanets expand and escape hydrodynamically due to the intense heating by the X-ray and extreme ultraviolet (XUV) irradiation of their host stars. Excess absorption of neutral hydrogen has been observed in the Lyα line during transits of several close-in gaseous exoplanets, indicating such extended atmospheres. Aims. For the hot Jupiter HD 189733b, this absorption shows temporal variability. We aim to study if variations in stellar XUV emission and/or variable stellar wind conditions may explain this effect. Methods. We applied a 1D hydrodynamic
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Leitherer, Claus. "Spectral Evolution Models for the Next Decade." Proceedings of the International Astronomical Union 5, S262 (2009): 73–80. http://dx.doi.org/10.1017/s1743921310002553.

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AbstractSpectral evolution models are a widely used tool for determining the stellar content of galaxies. I provide a review of the latest developments in stellar atmosphere and evolution models, with an emphasis on massive stars. In contrast to the situation for low- and intermediate-mass stars, the current main challenge for spectral synthesis models are the uncertainties and rapid revision of current stellar evolution models. Spectral libraries, in particular those drawn from theoretical model atmospheres for hot stars, are relatively mature and can complement empirical templates for larger
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Lanz, Thierry, Ivan Hubeny, and Sara R. Heap. "NLTE Line-Blanketed Model Stellar Atmospheres." Symposium - International Astronomical Union 210 (2003): 67–79. http://dx.doi.org/10.1017/s0074180900133261.

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We briefly review the assumptions and methods required to construct NLTE line-blanketed model atmospheres of hot stars. We describe our new grid of NLTE model atmospheres covering the parameter range of O stars at various metallicities. We have applied these new models to the analysis of HST/STIS and FUSE UV spectra of O stars in the SMC. This analysis leads us to revise down the effective temperature scale of O-type stars.
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Stasińska, Grazyna, Daniel Schaerer, and Claude J. Zeippen. "Nebular diagnostics of hot star atmospheres." Symposium - International Astronomical Union 212 (2003): 481–86. http://dx.doi.org/10.1017/s0074180900212679.

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The ionization structure of nebulae depends on the spectral energy distribution of the ionizing stars. Therefore nebulae are potential tools to check the validity of the energy distribution predicted by stellar atmosphere models. However, the problem is complicated by the fact that the ionization structure also depends on the nebular density distribution and that the predictions of photo-ionization models strongly rely on atomic physics computations, which bear their own uncertainties.
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Juráňová, A., N. Werner, P. E. J. Nulsen, et al. "Hot gaseous atmospheres of rotating galaxies observed with XMM–Newton." Monthly Notices of the Royal Astronomical Society 499, no. 4 (2020): 5163–74. http://dx.doi.org/10.1093/mnras/staa3182.

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ABSTRACT X-ray emitting atmospheres of non-rotating early-type galaxies and their connection to central active galactic nuclei have been thoroughly studied over the years. However, in systems with significant angular momentum, processes of heating and cooling are likely to proceed differently. We present an analysis of the hot atmospheres of six lenticulars and a spiral galaxy to study the effects of angular momentum on the hot gas properties. We find an alignment between the hot gas and the stellar distribution, with the ellipticity of the X-ray emission generally lower than that of the optic
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Dissertations / Theses on the topic "Hot Stellar Atmospheres"

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Deady, Michelle. "Numerical Simulations of Microturbulence in Hot Stellar Atmospheres." University of Toledo / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1481110241748458.

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Levenhagen, Ronaldo S., Marcos P. Diaz, Paula R. T. Coelho, and Ivan Hubeny. "A Grid of Synthetic Spectra for Hot DA White Dwarfs and Its Application in Stellar Population Synthesis." IOP PUBLISHING LTD, 2017. http://hdl.handle.net/10150/624926.

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In this work we present a grid of LTE and non-LTE synthetic spectra of hot DA white dwarfs (WDs). In addition to its usefulness for the determination of fundamental stellar parameters of isolated WDs and in binaries, this grid will be of interest for the construction of theoretical libraries for stellar studies from integrated light. The spectral grid covers both a wide temperature and gravity range, with 17,000 K <= T-eff <= 100,000 K and 7.0 <= log g <= 9.5. The stellar models are built for pure hydrogen and the spectra cover a wavelength range from 900 angstrom to 2.5 mu m. Additionally, we
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Sundqvist, Jon. "Quantitative spectroscopy of stellar atmospheres and clumped hot star winds - new methods and first results for deriving mass-loss rates." Diss., lmu, 2010. http://nbn-resolving.de/urn:nbn:de:bvb:19-126131.

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Corliss, David J. "Time Series Analysis of the A0 Supergiant HR 1040." University of Toledo / OhioLINK, 2013. http://rave.ohiolink.edu/etdc/view?acc_num=toledo1357916123.

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Wit, Julien de, Nikole K. Lewis, Heather A. Knutson, et al. "Planet-induced Stellar Pulsations in HAT-P-2's Eccentric System." IOP PUBLISHING LTD, 2017. http://hdl.handle.net/10150/624378.

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Extrasolar planets on eccentric short-period orbits provide a laboratory in which to study radiative and tidal interactions between a planet and its host star under extreme forcing conditions. Studying such systems probes how the planet's atmosphere redistributes the time-varying heat flux from its host and how the host star responds to transient tidal distortion. Here, we report the insights into the planet-star interactions in HAT-P-2's eccentric planetary system gained from the analysis of similar to 350 hr of 4.5 mu m observations with the Spitzer Space Telescope. The observations show no
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Sundqvist, Jon [Verfasser]. "Quantitative spectroscopy of stellar atmospheres and clumped hot star winds : new methods and first results for deriving mass-loss rates / submitted by Jon Sundqvist." 2010. http://d-nb.info/1010510401/34.

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Nortmann, Lisa. "Transmission spectra of highly irradiated extrasolar planet atmospheres." Doctoral thesis, 2015. http://hdl.handle.net/11858/00-1735-0000-002B-7CA1-8.

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Johnas, Christine M. S. [Verfasser]. "Non-analytical line profiles in stellar atmospheres : for planetary host star systems / vorgelegt von Christine M. S. Johnas." 2008. http://d-nb.info/987361937/34.

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Books on the topic "Hot Stellar Atmospheres"

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Walborn, Nolan R. Evolutionary helium and CNO anomalies in the atmospheres and winds of massive hot stars. Space Telescope Science Institute, 1987.

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2

Winds in hot main-sequence stars near the static limit. National Aeronautics and Space Administration, 1995.

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Winds in hot main-sequence stars near the static limit. National Aeronautics and Space Administration, 1995.

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United States. National Aeronautics and Space Administration., ed. Winds in hot main-sequence stars near the static limit. National Aeronautics and Space Administration, 1995.

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Book chapters on the topic "Hot Stellar Atmospheres"

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Bisikalo, Dmitry V., Pavel V. Kaygorodov, Dmitry E. Ionov, and Valery I. Shematovich. "Types of Hot Jupiter Atmospheres." In Characterizing Stellar and Exoplanetary Environments. Springer International Publishing, 2014. http://dx.doi.org/10.1007/978-3-319-09749-7_5.

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Fullerton, A. W. "Observations of hot-star winds." In Stellar Atmospheres: Theory and Observations. Springer Berlin Heidelberg, 1997. http://dx.doi.org/10.1007/bfb0113486.

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Rauch, Thomas, and Klaus Werner. "NLTE Model Atmospheres for Hot Stars." In Stellar Atmospheres: Beyond Classical Models. Springer Netherlands, 1991. http://dx.doi.org/10.1007/978-94-011-3554-2_16.

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Werner, Klaus, and Ulrich Heber. "Spectral Diagnostics of Hot Subdwarfs: Successes and Problems." In Stellar Atmospheres: Beyond Classical Models. Springer Netherlands, 1991. http://dx.doi.org/10.1007/978-94-011-3554-2_32.

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Schmutz, Werner. "Non-LTE Analysis of Hot Stars Including Line Blanketing." In Stellar Atmospheres: Beyond Classical Models. Springer Netherlands, 1991. http://dx.doi.org/10.1007/978-94-011-3554-2_18.

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Kudritzki, R. P. "Stellar Atmosphere Theory as a Spectroscopic Tool. The Example of Hot Stars." In Stellar Atmospheres: Beyond Classical Models. Springer Netherlands, 1991. http://dx.doi.org/10.1007/978-94-011-3554-2_28.

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Hillier, D. J. "Non-LTE Line Blanketed Atmospheres for Hot Stars." In Fundamental Stellar Properties: The Interaction Between Observation and Theory. Springer Netherlands, 1997. http://dx.doi.org/10.1007/978-94-011-5602-8_29.

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