Modeling polarization signatures of NIR radiation from the Sgr A* black hole environs

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F12%3A00384841" target="_blank" >RIV/67985815:_____/12:00384841 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1088/1742-6596/372/1/012073" target="_blank" >http://dx.doi.org/10.1088/1742-6596/372/1/012073</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1088/1742-6596/372/1/012073" target="_blank" >10.1088/1742-6596/372/1/012073</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Modeling polarization signatures of NIR radiation from the Sgr A* black hole environs

Popis výsledku v původním jazyce

The near-infrared (NIR) emission of Sagittarius A* (Sgr A*), the source associated with the supermassive black hole (4.4 x 10(6) M-circle dot) at the center of our galaxy, is polarized and highly variable. Correlations between intensity and polarimetricparameters of the observed light curves compared with the predicted ones for different configurations, allow us to extract information about the geometry of the radiating region. Here we present the theoretical polarimetric light curves expected in the case of optically thin NIR emission from overdense regions close to the marginal stable orbit. Using a numerical code we track the time evolution of detectable polarization properties produced by synchrotron emission of compact sources in the vicinity ofthe black hole. We show that the different setups lead to very distinctive patterns in the time profiles of polarized flux and the orientation of the polarization vector and as such may be used for determining the geometry of the accretio

Název v anglickém jazyce

Modeling polarization signatures of NIR radiation from the Sgr A* black hole environs

Popis výsledku anglicky

The near-infrared (NIR) emission of Sagittarius A* (Sgr A*), the source associated with the supermassive black hole (4.4 x 10(6) M-circle dot) at the center of our galaxy, is polarized and highly variable. Correlations between intensity and polarimetricparameters of the observed light curves compared with the predicted ones for different configurations, allow us to extract information about the geometry of the radiating region. Here we present the theoretical polarimetric light curves expected in the case of optically thin NIR emission from overdense regions close to the marginal stable orbit. Using a numerical code we track the time evolution of detectable polarization properties produced by synchrotron emission of compact sources in the vicinity ofthe black hole. We show that the different setups lead to very distinctive patterns in the time profiles of polarized flux and the orientation of the polarization vector and as such may be used for determining the geometry of the accretio

Druh

D - Stať ve sborníku

CEP obor

BN - Astronomie a nebeská mechanika, astrofyzika

OECD FORD obor

—

Projekt

—

Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2012

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název statě ve sborníku

Astronomy at High Angular Resolution : The Central Kiloparsec in Galactic Nuclei

ISBN

—

ISSN

1742-6588

e-ISSN

—

Počet stran výsledku

5

Strana od-do

"012073/1"-"012073/5"

Název nakladatele

Institute of Physics Publishing

Místo vydání

Bristol

Místo konání akce

Bad Honnef

Datum konání akce

28. 8. 2011

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

000307718600073