Relevant bibliographies by topics / Comptonization

Contents

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

Academic literature on the topic 'Comptonization'

Author: Grafiati
Published: 4 June 2021
Last updated: 20 February 2023

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Journal articles on the topic "Comptonization"

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Steiner, James F., Ramesh Narayan, Jeffrey E. McClintock, and Ken Ebisawa. "A Simple Comptonization Model." Publications of the Astronomical Society of the Pacific 121, no. 885 (November 2009): 1279–90. http://dx.doi.org/10.1086/648535.

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Chen, Yu-Peng, Shu Zhang, Long Ji, Shuang-Nan Zhang, Ling-Da Kong, Peng-Ju Wang, Zhi Chang, Jing-Qiang Peng, Jin-Lu Qu, and Jian Li. "Insight-HXMT Observation of 4U 1608–52: Evidence of Interplay between a Thermonuclear Burst and Accretion Environment." Astrophysical Journal 936, no. 1 (August 30, 2022): 46. http://dx.doi.org/10.3847/1538-4357/ac87a0.

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Abstract A Type I burst could influence the accretion process through radiation pressure and Comptonization both for the accretion disk and the corona/boundary layer of an X-ray binary, and vice versa. We investigate the temporal evolution of a bright photospheric radius expansion (PRE) burst of 4U 1608–52 detected by Insight-HXMT in 1–50 keV, with the aim to study the interplay between the burst and persistent emission. Apart from the emission from the neutron star (NS) surface, we find residuals in both the soft (<3 keV) and hard (>10 keV) X-ray bands. Time-resolved spectroscopy reveals that the excess can be attributed to either an enhanced preburst/persistent emission or the Comptonization of the burst emission by the corona/boundary layer. The Comptonization model is a convolution thermal-Comptonization model (thcomp in XSPEC), and the Comptonization parameters are fixed at the values derived from the persistent emission. We find, during the PRE phase, after the enhanced preburst/persistent emission or the Comptonization of the burst emission is removed, the NS surface emission shows a plateau and then a rise until the photosphere touches down on the NS surface, resulting in a flux peak at that moment. We speculate that the findings above correspond to the lower part of the NS surface that is obscured by the disk being exposed to the line of sight due to the evaporation of inner disk by the burst emission. The consistency between the f a model and convolution thermal-Comptonization model indicates the interplay between thermonuclear bursts and accretion environments. These phenomena do not usually show up in conventional blackbody model fittings, which may be due to the low count rate and narrow energy coverage in previous observations.
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Celotti, A., G. Ghisellini, and A. C. Fabian. "Bulk Comptonization spectra in blazars." Monthly Notices of the Royal Astronomical Society 375, no. 2 (February 21, 2007): 417–24. http://dx.doi.org/10.1111/j.1365-2966.2006.11289.x.

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Ghisellini, G., and A. Celotti. "Quasi–thermal comptonization and GRBs." Astronomy and Astrophysics Supplement Series 138, no. 3 (September 1999): 527–28. http://dx.doi.org/10.1051/aas:1999339.

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Dziełak, Marta A., Barbara De Marco, and Andrzej A. Zdziarski. "A spectrally stratified hot accretion flow in the hard state of MAXI J1820+070." Monthly Notices of the Royal Astronomical Society 506, no. 2 (June 14, 2021): 2020–29. http://dx.doi.org/10.1093/mnras/stab1700.

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ABSTRACT We study the structure of the accretion flow in the hard state of the black hole X-ray binary MAXI J1820+070 with NICER data. The power spectra show broad-band variability which can be fit with four Lorentzian components peaking at different time-scales. Extracting power spectra as a function of energy enables the energy spectra of these different power spectral components to be reconstructed. We found significant spectral differences among Lorentzians, with the one corresponding to the shortest variability time-scales displaying the hardest spectrum. Both the variability spectra and the time-averaged spectrum are well-modelled by a disc blackbody and thermal Comptonization, but the presence of (at least) two Comptonization zones with different temperatures and optical depths is required. The disc blackbody component is highly variable, but only in the variability components peaking at the longest time-scales ($\lower.5ex\hbox{$\,\, \buildrel\gt \over \sim \,\,$}1$ s). The seed photons for the spectrally harder zone come predominantly from the softer Comptonization zone. Our results require the accretion flow in this source to be structured, and cannot be described by a single Comptonization region upscattering disc blackbody photons, and reflection from the disc.
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Vilhu, Osmi, Juri Poutanen, Petter Nikula, and Jukka Nevalainen. "Thermal Comptonization in GRS 1915+105." Astrophysical Journal 553, no. 1 (May 20, 2001): L51—L54. http://dx.doi.org/10.1086/320489.

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Socrates, Aristotle. "RELATIVISTIC ACCRETION MEDIATED BY TURBULENT COMPTONIZATION." Astrophysical Journal 719, no. 1 (July 23, 2010): 784–89. http://dx.doi.org/10.1088/0004-637x/719/1/784.

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Dreissigacker, Oliver. "Comptonization as Blazar High Energy Emission." Symposium - International Astronomical Union 175 (1996): 421–22. http://dx.doi.org/10.1017/s0074180900081316.

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We explain the overall continuous Grazar (Gamma Ray Blazar) spectrum from the synchrotron turnover to the EGRET GeV detections by means of Comptonization in the parsec scale jet's substructures.While making use of the constraints on the synchrotron spectrum and other measurable quantities, no exotic particle acceleration is needed to achieve the high energy output.We show, that the “Lighthouse Model” of blobs of relativistic electrons, travelling with the jet plasma at relativistic speeds, produce both, correct timescales and shapes for the lightcurve, and correct ratios and slopes of the synchrotron, X-ray and γ-ray branches.
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Socrates, Aristotle, Shane W. Davis, and Omer Blaes. "Turbulent Comptonization in relativistic accretion disks." Advances in Space Research 38, no. 12 (January 2006): 2880–83. http://dx.doi.org/10.1016/j.asr.2006.08.002.

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Maraschi, L., and S. Molendi. "Thermal Comptonization in standard accretion disks." Astrophysical Journal 353 (April 1990): 452. http://dx.doi.org/10.1086/168633.

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Dissertations / Theses on the topic "Comptonization"

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Cullen, Jason Graham. "Inverse compton scattering in high energy astrophysics." University of Sydney. Physics, 2001. http://hdl.handle.net/2123/849.

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This thesis investigates some aspects of the inverse Compton scattering process within various physical contexts in high energy astrophysics. Initially an introduction to the key results of Comptonization theory for the case of scattering in optically thick plasmas is given, using a diffusion approach, since these results are required for the interpreta- tion of Comptonized spectra. Since Comptonization in astrophysical systems is frequently treated using numerical techniques, an introduction to these is then presented. Such linear Monte Carlo photon transport codes are typically applied to scattering in plasmas without temperature and density gradients. Additionally, treating bulk motion can be difficult even for simple cases. It is demonstrated that these problems can be made tractable numerically with the use of algorithms associated with non-linear Monte Carlo codes. Such codes can already treat scattering within arbitrary velocity structures in a plasma, and an extension of the algo- rithm is proposed that enables the easy calculation of photon transport in plasmas with non-constant density as well as non-constant temperature and/or bulk motion. This algorithm and code has been developed to treat scattering in astrophysical situations where bulk motion, temperature gradients and density gradients are simultaneously present in a plasma. Both a semi-analytic approach and the numerical approach are then used to treat Comp- tonization problems of current interest. Firstly, the standard two-phase disk-corona model for the high-energy spectra of Active Galactic Nuclei is modified to include an an outflow or wind which may provide an additional source of disk cooling. Earlier slab disk-corona models predict a spectral index which is consistent with observations only if all the accretion power is dissipated in the corona. For the models investigated here, energy spectral indices that are consistent with observations can be obtained with less accretion power being dissipated in the corona, as a result of an outflow/wind. However, it is required that the wind extract large amounts of power from the disk, and it it yet to be seen if this is a plausible scenario.
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Book chapters on the topic "Comptonization"

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Kylafis, N. D., and P. Reig. "Bulk-Flow Comptonization and Time Lags Due to Comptonization." In The Neutron Star—Black Hole Connection, 283–94. Dordrecht: Springer Netherlands, 2001. http://dx.doi.org/10.1007/978-94-010-0548-7_17.

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Walter, R. "Thermal Comptonization in AGN." In Physics of Active Galactic Nuclei, 257–58. Berlin, Heidelberg: Springer Berlin Heidelberg, 1992. http://dx.doi.org/10.1007/978-3-642-77566-6_66.

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Dreissigacker, Oliver. "Comptonization as Blazar High Energy Emission." In Extragalactic Radio Sources, 421–22. Dordrecht: Springer Netherlands, 1996. http://dx.doi.org/10.1007/978-94-009-0295-4_149.

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Vilhu, Osmi, Petter Nikula, Juri Poutanen, and Jukka Nevalainen. "Thermal Comptonization in GRS 1915+105." In Microquasars, 185–86. Dordrecht: Springer Netherlands, 2001. http://dx.doi.org/10.1007/978-94-010-0700-9_48.

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Schulz, N. S., and R. A. M. J. Wijers. "Comptonization in Spectral Branches of Z-Sources." In The Lives of the Neutron Stars, 393–96. Dordrecht: Springer Netherlands, 1995. http://dx.doi.org/10.1007/978-94-011-0159-2_38.

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Poutanen, Juri. "Frequency-Dependent Polarization in Comptonization Models for AGN." In Multi-Wavelength Continuum Emission of AGN, 472. Dordrecht: Springer Netherlands, 1994. http://dx.doi.org/10.1007/978-94-010-9537-2_176.

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Nobili, L., T. Belloni, R. Turolla, and L. Zampieri. "Comptonization and Phase Lag Correlations in GRS 1915+105." In Microquasars, 217–20. Dordrecht: Springer Netherlands, 2001. http://dx.doi.org/10.1007/978-94-010-0700-9_54.

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TITARCHUK, LEV. "COMPTONIZATION PROCESSES IN GALACTIC AND EXTRAGALACTIC HIGH ENERGY SOURCES." In The Ninth Marcel Grossmann Meeting, 380–404. World Scientific Publishing Company, 2002. http://dx.doi.org/10.1142/9789812777386_0025.

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CHAKRABARTI, SANDIP K., and INDRANIL CHATTOPADHYAY. "BULK MOTION COMPTONIZATION – A SURE SIGN OF BLACK HOLES." In The Ninth Marcel Grossmann Meeting, 2253–54. World Scientific Publishing Company, 2002. http://dx.doi.org/10.1142/9789812777386_0541.

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LAURENT, P., and L. TITARCHUK. "MONTE-CARLO SIMULATIONS OF COMPTONIZATION ON FREE-FALLING ELECTRONS." In The Ninth Marcel Grossmann Meeting, 2327–28. World Scientific Publishing Company, 2002. http://dx.doi.org/10.1142/9789812777386_0567.

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Conference papers on the topic "Comptonization"

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Sikora, Marek, Mitchell C. Begelman, and Martin J. Rees. "Comptonization of external radiation in blazars." In COMPTON GAMMA-RAY OBSERVATORY. AIP, 1993. http://dx.doi.org/10.1063/1.44292.

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Titarchuk, Lev. "Comptonization processes in Galactic and extragalactic high energy sources." In The fourth compton symposium. AIP, 1997. http://dx.doi.org/10.1063/1.54009.

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Petrucci, Pierre-Olivier, Stéphane Paltani, Julien Malzac, Jelle Kaastra, Massimo Cappi, G. Ponti, Barbara de Marco, et al. "Multiwavelength campaign on Mrk 509: testing realistic comptonization models." In An INTEGRAL view of the high-energy sky (the first 10 years) - 9th INTEGRAL Workshop and celebration of the 10th anniversary of the launch. Trieste, Italy: Sissa Medialab, 2013. http://dx.doi.org/10.22323/1.176.0063.

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Wolff, Michael T., Peter A. Becker, and Kenneth D. Wolfram. "Comptonization and the Spectra of Accretion‐Powered X‐Ray Pulsars." In THE MULTICOLORED LANDSCAPE OF COMPACT OBJECTS AND THEIR EXPLOSIVE ORIGINS. American Institute of Physics, 2007. http://dx.doi.org/10.1063/1.2774900.

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Paizis, A., R. Farinelli, L. Titarchuk, F. Frontera, M. Cocchi, C. Ferrigno, Jéro^me Rodriguez, and Phillippe Ferrando. "A New Comptonization Model for Weakly Magnetized Accreting NS LMXBs." In SIMBOL-X: FOCUSING ON THE HARD X-RAY UNIVERSE: Proceedings of the 2nd International Simbol-X Symposium. AIP, 2009. http://dx.doi.org/10.1063/1.3149441.

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Mészáros, P. "Photospheres, Comptonization and X-ray lines in gamma-ray bursts." In The fifth huntsville gamma-ray burst symposium. AIP, 2000. http://dx.doi.org/10.1063/1.1361591.

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Guainazzi, M. "Comptonization in X-ray bright neutron star globular cluster systems." In X-RAY ASTRONOMY: Stellar Endpoints,AGN, and the Diffuse X-ray Background. AIP, 2001. http://dx.doi.org/10.1063/1.1434705.

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Chiang, James. "Thermal comptonization and disk reprocessing in type 1 Seyfert galaxies." In GAMMA 2001: Gamma-Ray Astrophysics 2001. AIP, 2001. http://dx.doi.org/10.1063/1.1419436.

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Suzuki, Akihiro, Toshikazu Shigeyama, Nobuyuki Kawai, and Shigehiro Nagataki. "Bulk Comptonization at the emergence of shock waves from stellar atmospheres." In DECIPHERING THE ANCIENT UNIVERSE WITH GAMMA-RAY BURSTS. AIP, 2010. http://dx.doi.org/10.1063/1.3509334.

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Baring, Matthew G. "Comptonization modifications to the gamma-ray spectrum of active galactic nuclei." In Testing the AGN paradigm diagnostics. AIP, 1992. http://dx.doi.org/10.1063/1.42205.

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