A magnetized torus for modeling Sagittarius A* millimeter
images and spectra

J 2015

A magnetized torus for modeling Sagittarius A* millimeter images and spectra

ABRAMOWICZ, Marek, Odele STRAUB, Frederic H. VINCENT, Wenchi YAN, Andrzej A ZDZIARSKI et. al.

Basic information

Original name

A magnetized torus for modeling Sagittarius A* millimeter images and spectra

Authors

ABRAMOWICZ, Marek, Odele STRAUB, Frederic H. VINCENT, Wenchi YAN and Andrzej A ZDZIARSKI

Edition

Astronomy & Astrophysics, FR - Francouzská republika, 2015, 0004-6361

Other information

Language

English

Type of outcome

Článek v odborném periodiku

Field of Study

10308 Astronomy

Confidentiality degree

není předmětem státního či obchodního tajemství

References:

URL

Organization unit

Faculty of Philosophy and Science in Opava

DOI

http://dx.doi.org/10.1051/0004-6361/201424306

UT WoS

000349467000048

Keywords in English

Galaxy: center; accretion; accretion disks; black hole physics; relativistic processes

Links

EE2.3.20.0071, research and development project.

Změněno: 15/4/2021 11:03, Mgr. Pavlína Jalůvková

Abstract

V originále

The supermassive black hole, Sagittarius (Sgr) A*, in the centre of our Galaxy has the largest angular size in the sky among all astrophysical black holes. Its shadow, assuming no rotation, spans similar to 50 mu as. Resolving such dimensions has long been out of reach for astronomical instruments until a new generation of interferometers being operational during this decade. Of particular interest is the Event Horizon Telescope (EHT) with resolution similar to 20 mu as in the millimeter- wavelength range 0.87 mm - 1.3 mm. We investigate the ability of the fully general relativistic Komissarov (2006, MNRAS, 368, 993) analytical magnetized torus model to account for observable constraints at Sgr A* in the centimeter and millimeter domains. The impact ofthe magnetic field geometry on the observables is also studied. We show that the torus model is capable of reproducing spectral constraints in the millimeter domain, and in particular in the observable domain of the EHT. However, the tor

Citovat

ABRAMOWICZ, Marek, Odele STRAUB, Frederic H. VINCENT, Wenchi YAN and Andrzej A ZDZIARSKI. A magnetized torus for modeling Sagittarius A* millimeter images and spectra. Astronomy & Astrophysics. FR - Francouzská republika, 2015, vol. 574, February, p. "A48-1"-"A48-9", 9 pp. ISSN 0004-6361. Available from: https://dx.doi.org/10.1051/0004-6361/201424306.

@article{43600,
   author = {Abramowicz, Marek and Straub, Odele and Vincent, Frederic H. and Yan, Wenchi and Zdziarski, Andrzej A},
   article_location = {FR - Francouzská republika},
   article_number = {February},
   doi = {http://dx.doi.org/10.1051/0004-6361/201424306},
   keywords = {Galaxy: center; accretion; accretion disks; black hole physics; relativistic processes},
   language = {eng},
   issn = {0004-6361},
   journal = {Astronomy & Astrophysics},
   title = {A magnetized torus for modeling Sagittarius A* millimeter images and spectra},
   url = {https://www.aanda.org/articles/aa/abs/2015/02/aa24306-14/aa24306-14.html},
   volume = {574},
   year = {2015}
}

TY  - JOUR
ID  - 43600
AU  - Abramowicz, Marek - Straub, Odele - Vincent, Frederic H. - Yan, Wenchi - Zdziarski, Andrzej A
PY  - 2015
TI  - A magnetized torus for modeling Sagittarius A* millimeter images and spectra
JF  - Astronomy & Astrophysics
VL  - 574
IS  - February
SP  - "A48-1"-"A48-9"
EP  - "A48-1"-"A48-9"
SN  - 00046361
KW  - Galaxy: center
KW  - accretion
KW  - accretion disks
KW  - black hole physics
KW  - relativistic processes
UR  - https://www.aanda.org/articles/aa/abs/2015/02/aa24306-14/aa24306-14.html
N2  - The supermassive black hole, Sagittarius (Sgr) A*, in the centre of our Galaxy has the largest angular size in the sky among all astrophysical black holes. Its shadow, assuming no rotation, spans similar to 50 mu as. Resolving such dimensions has long been out of reach for astronomical instruments until a new generation of interferometers being operational during this decade. Of particular interest is the Event Horizon Telescope (EHT) with resolution similar to 20 mu as in the millimeter- wavelength range 0.87 mm - 1.3 mm. We investigate the ability of the fully general relativistic Komissarov (2006, MNRAS, 368, 993) analytical magnetized torus model to account for observable constraints at Sgr A* in the centimeter and millimeter domains. The impact ofthe magnetic field geometry on the observables is also studied. We show that the torus model is capable of reproducing spectral constraints in the millimeter domain, and in particular in the observable domain of the EHT. However, the tor
ER  -

ABRAMOWICZ, Marek, Odele STRAUB, Frederic H. VINCENT, Wenchi YAN and Andrzej A ZDZIARSKI. A magnetized torus for modeling Sagittarius A* millimeter images and spectra. \textit{Astronomy \&{} Astrophysics}. FR - Francouzská republika, 2015, vol.~574, February, p.~''A48-1''-''A48-9'', 9 pp. ISSN~0004-6361. Available from: https://dx.doi.org/10.1051/0004-6361/201424306.

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