Nonthermal Emission from Fall-back Clouds in the Broad-line
Region of Active Galactic Nuclei

J 2022

Nonthermal Emission from Fall-back Clouds in the Broad-line Region of Active Galactic Nuclei

MÜLLER, Ana Laura, Mohammad-Hassan NADDAF, Michal ZAJAČEK, Bożena CZERNY, Anabella ARAUDO et. al.

Základní údaje

Originální název

Nonthermal Emission from Fall-back Clouds in the Broad-line Region of Active Galactic Nuclei

Autoři

MÜLLER, Ana Laura (garant), Mohammad-Hassan NADDAF, Michal ZAJAČEK (703 Slovensko, domácí), Bożena CZERNY, Anabella ARAUDO a Vladimír KARAS

Vydání

Astrophysical Journal, IOP Publishing, 2022, 0004-637X

Další údaje

Jazyk

angličtina

Typ výsledku

Článek v odborném periodiku

Obor

10308 Astronomy

Stát vydavatele

Velká Británie a Severní Irsko

Utajení

není předmětem státního či obchodního tajemství

Odkazy

URL URL

Impakt faktor

Impact factor: 4.900

Kód RIV

RIV/00216224:14310/22:00129070

Organizační jednotka

Přírodovědecká fakulta

DOI

http://dx.doi.org/10.3847/1538-4357/ac660a

UT WoS

000798966500001

Klíčová slova anglicky

Nonthermal radiation sources; Shocks; Active galactic nuclei; Galaxy accretion; Emission line galaxies

Štítky

rivok

Příznaky

Mezinárodní význam, Recenzováno

Změněno: 15. 12. 2022 12:13, Mgr. Marie Šípková, DiS.

Anotace

V originále

The spectra of active galactic nuclei exhibit broad-emission lines that presumably originate in the broad-line region (BLR) with gaseous-dusty clouds in a predominantly Keplerian motion around the central black hole. Signatures of both inflow and outflow motion are frequently seen. The dynamical character of BLR is consistent with the scenario that has been branded as the failed radiatively accelerated dusty outflow. In this scheme, frequent high-velocity impacts of BLR clouds falling back onto the underlying accretion disk are predicted. The impact velocities depend mainly on the black hole mass, accretion rate, and metallicity, and they range from a few km s−1 up to thousands of km s−1. Formation of strong shocks due to the collisions can give rise to the production of relativistic particles and associated radiation signatures. In this work, the nonthermal radiation generated in this process is investigated, and the spectral energy distributions for different parameter sets are presented. We find that the nonthermal processes caused by the impacts of clouds can lead to emission in the X-ray and the gamma-ray bands, playing the cloud density and metallicity key roles.

Návaznosti

GX21-13491X, projekt VaV

Název: Zkoumání žhavého vesmíru a porozumění kosmické zpětné vazbě (Akronym: EHU)

Investor: Grantová agentura ČR, Exploring the Hot Universe and Understanding Comic Feedback

Citovat

MÜLLER, Ana Laura, Mohammad-Hassan NADDAF, Michal ZAJAČEK, Bożena CZERNY, Anabella ARAUDO a Vladimír KARAS. Nonthermal Emission from Fall-back Clouds in the Broad-line Region of Active Galactic Nuclei. Astrophysical Journal. IOP Publishing, 2022, roč. 931, č. 1, s. 1-16. ISSN 0004-637X. Dostupné z: https://dx.doi.org/10.3847/1538-4357/ac660a.

@article{1857665,
   author = {Müller, Ana Laura and Naddaf, MohammadandHassan and Zajaček, Michal and Czerny, Bożena and Araudo, Anabella and Karas, Vladimír},
   article_number = {1},
   doi = {http://dx.doi.org/10.3847/1538-4357/ac660a},
   keywords = {Nonthermal radiation sources; Shocks; Active galactic nuclei; Galaxy accretion; Emission line galaxies},
   language = {eng},
   issn = {0004-637X},
   journal = {Astrophysical Journal},
   title = {Nonthermal Emission from Fall-back Clouds in the Broad-line Region of Active Galactic Nuclei},
   url = {https://iopscience.iop.org/article/10.3847/1538-4357/ac660a/meta},
   volume = {931},
   year = {2022}
}

TY  - JOUR
ID  - 1857665
AU  - Müller, Ana Laura - Naddaf, Mohammad-Hassan - Zajaček, Michal - Czerny, Bożena - Araudo, Anabella - Karas, Vladimír
PY  - 2022
TI  - Nonthermal Emission from Fall-back Clouds in the Broad-line Region of Active Galactic Nuclei
JF  - Astrophysical Journal
VL  - 931
IS  - 1
SP  - 1-16
EP  - 1-16
PB  - IOP Publishing
SN  - 0004637X
KW  - Nonthermal radiation sources
KW  - Shocks
KW  - Active galactic nuclei
KW  - Galaxy accretion
KW  - Emission line galaxies
UR  - https://iopscience.iop.org/article/10.3847/1538-4357/ac660a/meta
N2  - The spectra of active galactic nuclei exhibit broad-emission lines that presumably originate in the broad-line region (BLR) with gaseous-dusty clouds in a predominantly Keplerian motion around the central black hole. Signatures of both inflow and outflow motion are frequently seen. The dynamical character of BLR is consistent with the scenario that has been branded as the failed radiatively accelerated dusty outflow. In this scheme, frequent high-velocity impacts of BLR clouds falling back onto the underlying accretion disk are predicted. The impact velocities depend mainly on the black hole mass, accretion rate, and metallicity, and they range from a few km s−1 up to thousands of km s−1. Formation of strong shocks due to the collisions can give rise to the production of relativistic particles and associated radiation signatures. In this work, the nonthermal radiation generated in this process is investigated, and the spectral energy distributions for different parameter sets are presented. We find that the nonthermal processes caused by the impacts of clouds can lead to emission in the X-ray and the gamma-ray bands, playing the cloud density and metallicity key roles.
ER  -

MÜLLER, Ana Laura, Mohammad-Hassan NADDAF, Michal ZAJAČEK, Bo$\backslash$.zena CZERNY, Anabella ARAUDO a Vladimír KARAS. Nonthermal Emission from Fall-back Clouds in the Broad-line Region of Active Galactic Nuclei. \textit{Astrophysical Journal}. IOP Publishing, 2022, roč.~931, č.~1, s.~1-16. ISSN~0004-637X. Dostupné z: https://dx.doi.org/10.3847/1538-4357/ac660a.

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