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Relevant bibliographies by topics / Extra-galactic astro

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Journal articles
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Academic literature on the topic 'Extra-galactic astro'

Author: Grafiati

Published: 1 April 2023

Last updated: 31 July 2025

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Journal articles on the topic "Extra-galactic astro"

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Cox, Nick L. J. "The Diffuse Interstellar Bands: an Elderly Astro-Puzzle Rejuvenated." Proceedings of the International Astronomical Union 7, S280 (2011): 162–76. http://dx.doi.org/10.1017/s1743921311024951.

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AbstractThe interstellar medium constitutes a physically and chemically complex component of galaxies and is important in the cycle of matter and the evolution of stars. From various spectroscopic clues we now know that the interstellar medium is rich in organic compounds. However, identifying the exact nature of all these components remains a challenge. In particular the identification of the so-called diffuse band carriers has been alluding astronomers for almost a century.In recent decades, observational, experimental and theoretical advances have rapidly lead to renewed interest in the dif

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Mirzoyan, Razmik. "Technological Novelties of Ground-Based Very High Energy Gamma-Ray Astrophysics with the Imaging Atmospheric Cherenkov Telescopes." Universe 8, no. 4 (2022): 219. http://dx.doi.org/10.3390/universe8040219.

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In the past three decades, the ground-based technique of imaging atmospheric Cherenkov telescopes has established itself as a powerful discipline in science. Approximately 250 sources of very high gamma rays of both galactic and extra-galactic origin have been discovered largely due to this technique. The study of these sources is providing clues to many basic questions in astrophysics, astro-particle physics, physics of cosmic rays and cosmology. The currently operational generation of telescopes offer a solid performance. Further improvements of this technique led to the next-generation larg

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Serlemitsos, P. J. "The Broad Band X-Ray Telescope (BBXRT) on Astro-1." International Astronomical Union Colloquium 123 (1990): 294. http://dx.doi.org/10.1017/s0252921100077198.

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AbstractBBXRT is one of four pointed instruments comprising NASA’s Astro-1 mission, currently scheduled for a 9–10 day flight in May 1990 on board the Space Shuttle Columbia. X-ray Spectra of over 150 sources will be obtained in the energy range 0.3 to 12 keV, with energy resolution of ~100 eV FWHM and timing resolution of 64 μS. BBXRT’S large throughput, broad band mirrors, coupled to segmented cooled Si(Li) detectors, give us the first opportunity to study in detail X-ray spectral features, from oxygen to the iron K band. In developing this instrument, we have made extensive use of detector

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Scuderi, Salvatore. "The ASTRI Mini-Array: A New Pathfinder for Imaging Cherenkov Telescope Arrays." Universe 10, no. 3 (2024): 146. http://dx.doi.org/10.3390/universe10030146.

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The ASTRI Mini-Array is an Istituto Nazionale di Astrofisica (INAF) project to build and operate an array of nine Imaging Atmospheric Cherenkov Telescopes (IACTs) at the Teide Astronomical Observatory of the Instituto de Astrofisica de Canarias in Tenerife (Spain) based on a host agreement with INAF and, as such, it will be the largest IACT array until the Cherenkov Telescope Array Observatory starts operations. Implementing the ASTRI Mini-Array poses several challenges from technical, logistic, and management points of view. Starting from the description of the innovative technologies adopted

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Niederhofer, F., A. Bellini, V. Kozhurina-Platais, et al. "Hubble Space Telescope proper motions of Large Magellanic Cloud star clusters. I. Catalogues and results for NGC1850." Astronomy & Astrophysics, June 20, 2024. http://dx.doi.org/10.1051/0004-6361/202450255.

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We present proper motion (PM) measurements for a sample of 23 massive star clusters within the Large Magellanic Cloud using multi-epoch data from the Hubble $. To demonstrate the potential and limitations of our PM data set, we analysed the cluster NGC 1850 and showcase a selection of different science applications. The precision of the PM measurements allows us to disentangle the kinematics of the various stellar populations that are present in the HST field. The cluster has a centre-of-mass motion that is different from the surrounding old field stars and also differs from the mean motion of

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Dissertations / Theses on the topic "Extra-galactic astro"

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WOJACZYNSKI, RAFAL PAWEL. "High Energy Radiation From Low-luminosity Accreting Black Holes." Doctoral thesis, Università degli Studi di Trieste, 2018. http://hdl.handle.net/11368/2948714.

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This PhD thesis includes theoretical and observational studies of gamma-ray emission from radio-quiet accreting black holes. The theoretical motivation for the search of gamma-ray emission from such sources concerns the considerable hadronic production of gamma-rays predicted by models of hot flows, which most likely power these sources at low luminosities. I thoroughly investigated this model prediction and I found that the luminosity at either hundreds of MeV or in the GeV range, depending on proton distribution, can reach ~10-5 LEdd for the X-ray luminosities between ~10-4LEdd and 10-3LEdd

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