D 2019

The central light-year of the Milky Way: How stars and gas live in a relativistic environment of a super-massive black hole

ECKART, Andreas, Michal ZAJACEK, Mónica VALENCIA-S., Marzieh PARSA, Elaheh HOSSEINI et. al.

Basic information

Original name

The central light-year of the Milky Way: How stars and gas live in a relativistic environment of a super-massive black hole

Authors

ECKART, Andreas (276 Germany), Michal ZAJACEK (703 Slovakia), Mónica VALENCIA-S. (170 Colombia), Marzieh PARSA (276 Germany), Elaheh HOSSEINI, Christian STRAUBMEIER (276 Germany), Matthew J. HORROBIN (826 United Kingdom of Great Britain and Northern Ireland), Matthias SUBROWEIT (276 Germany) and Arman TURSUNOV (860 Uzbekistan, guarantor, belonging to the institution)

Edition

neuvedeno, Journal of Physics: Conference Series. Volume 1258, Issue 1, 21 October 2019, Article number 012019. 1st Sharjah International Conference on Particle Physics, Astrophysics and Cosmology, FISICPAC 2018; University of SharjahSharjah; United Arab Emirates; 11 November 2018 through 13 November 2018; Code 153573, p. "012019-1"-"012019-15", 15 pp. 2019

Publisher

Institute of Physics Publishing

Other information

Language

English

Type of outcome

Stať ve sborníku

Field of Study

10308 Astronomy

Country of publisher

United Kingdom of Great Britain and Northern Ireland

Confidentiality degree

není předmětem státního či obchodního tajemství

Publication form

printed version "print"

References:

URL

RIV identification code

RIV/47813059:19240/19:A0000566

Organization unit

Faculty of Philosophy and Science in Opava

ISSN

DOI

http://dx.doi.org/10.1088/1742-6596/1258/1/012019

Keywords in English

super-massive black holes; Sagittarius A*; Milky Way: central region; relativistic environment

Tags

, NENI VE WoS, RIVOK

Tags

International impact, Reviewed
Změněno: 23/3/2020 07:51, RNDr. Jan Hladík, Ph.D.

Abstract

V originále

The central region of our Milky Way is extremely active. It harbors the closest galactic nucleus that is accessible to us allowing us to study it in fine detail. Here we present a consice summary of some of the most recent results obtained with state of the art instruments providing sensitive measurements at their highest angular resolution. The central star cluster harbors a small cusp of high velocity mostly young and dusty stars that are in orbit around the 4 million solar mass super massive black hole (SMBH) Sagittarius A* (SgrA*). Molecular and atomic gas is streaming towards this region in the form of a spiral connecting it to the Circum Nuclear Ring. Using the Large Atacama Millimeter Array (ALMA) we investigated the kinematics and composition of this material in detail highlighting signatures of star formation and the interaction with a wind emerging form the direction of SgrA*. Using results from the Very Large Telescope (VLT) we will highlight the dynamics of the ultra-fast stars and present theories on their origin. We demonstrate that one of the innermost stars shows clear signs of relativistic motion in the deep potential well of the SMBH. The interaction of plasma with SgrA* reveals that matter is orbiting and is being accreted onto the SMBH to produce powerful flares. These are detectable all across the electromagnetic spectrum and help us to understand the region close to the event horizon of SgrA* which is currently under investigation using the Event Horizon Telescope (EHT).
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