Detailed Information on Publication Record
2023
Accretion disks, quasars and cosmology: meandering towards understanding
CZERNY, Bozena, Shulei CAO, Vikram Kumar JAISWAL, Vladimír KARAS, Narayan KHADKA et. al.Basic information
Original name
Accretion disks, quasars and cosmology: meandering towards understanding
Authors
CZERNY, Bozena (guarantor), Shulei CAO, Vikram Kumar JAISWAL, Vladimír KARAS (203 Czech Republic), Narayan KHADKA, Mary Loli MARTÍNEZ-ALDAMA, Mohammad Hassan NADDAF, Swayamtrupta PANDA, Francisco Pozo NUÑEZ, Raj PRINCE, Bharat RATRA, Marzena SNIEGOWSKA, Zhefu YU and Michal ZAJAČEK (703 Slovakia, belonging to the institution)
Edition
Astrophysics and Space Science, Springer, 2023, 0004-640X
Other information
Language
English
Type of outcome
Článek v odborném periodiku
Field of Study
10308 Astronomy
Country of publisher
Netherlands
Confidentiality degree
není předmětem státního či obchodního tajemství
Impact factor
Impact factor: 1.900 in 2022
RIV identification code
RIV/00216224:14310/23:00134180
Organization unit
Faculty of Science
UT WoS
000929409300001
Keywords in English
Black holes; Galaxies; Accretion disks; Active galactic nuclei
Tags
Tags
International impact, Reviewed
Změněno: 8/8/2023 10:14, Mgr. Marie Šípková, DiS.
Abstract
V originále
As Setti and Woltjer noted back in 1973, one can use quasars to construct the Hubble diagram; however, the actual application of the idea was not that straightforward. It took years to implement the proposition successfully. Most ways to employ quasars for cosmology now require an advanced understanding of their structure, step by step. We briefly review this progress, with unavoidable personal biases, and concentrate on bright unobscured sources. We will mention the problem of the gas flow character close to the innermost stable circular orbit near the black hole, as discussed five decades ago. This problem later led to the development of the slim disk scenario and is recently revived in the context of Magnetically Arrested Disks (MAD) and Standard and Normal Evolution (SANE) models. We also discuss the hot or warm corona issue, which is still under debate and complicates the analysis of X-ray reflection. We present the scenario of the formation of the low ionization part of the Broad Line Region as a failed wind powered by radiation pressure acting on dust (Failed Radiatively Driven Dusty Outflow - FRADO). Next, we examine the cosmological constraints currently achievable with quasars, primarily concentrating on light echo methods (continuum time delays and spectral-line time delays to the continuum) that are (or should be) incorporating the progress mentioned above. Finally, we briefly discuss prospects in this lively subject area.
Links
| GX21-13491X, research and development project |
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