A binary system in the S cluster close to the supermassive black hole Sagittarius A*

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985815%3A_____%2F24%3A00603208" target="_blank" >RIV/67985815:_____/24:00603208 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216224:14310/24:00139734

Výsledek na webu

<a href="https://hdl.handle.net/11104/0361033" target="_blank" >https://hdl.handle.net/11104/0361033</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1038/s41467-024-54748-3" target="_blank" >10.1038/s41467-024-54748-3</a>

Jazyk výsledku

angličtina

Název v původním jazyce

A binary system in the S cluster close to the supermassive black hole Sagittarius A*

Popis výsledku v původním jazyce

High-velocity stars and peculiar G objects orbit the central supermassive black hole (SMBH) Sagittarius A* (Sgr A*). Together, the G objects and high-velocity stars constitute the S cluster. In contrast with theoretical predictions, no binary system near Sgr A* has been identified. Here, we report the detection of a spectroscopic binary system in the S cluster with the masses of the components of 2.80 +/- 0.50 M-circle dot and 0.73 +/- 0.14 M-circle dot, assuming an edge-on configuration. Based on periodic changes in the radial velocity, we find an orbital period of 372 +/- 3 days for the two components. The binary system is stable against the disruption by Sgr A* due to the semi-major axis of the secondary being 1.59 +/- 0.01 AU, which is well below its tidal disruption radius of approximately 42.4 AU. The system, known as D9, shows similarities to the G objects. We estimate an age for D9 of 2.7(-0.3)(+1.9)x10(6) yr that is comparable to the timescale of the SMBH-induced von Zeipel-Lidov-Kozai cycle period of about 106 yr, causing the system to merge in the near future. Consequently, the population of G objects may consist of pre-merger binaries and post-merger products. The detection of D9 implies that binary systems in the S cluster have the potential to reside in the vicinity of the supermassive black hole Sgr A* for approximately 106 years.

Název v anglickém jazyce

A binary system in the S cluster close to the supermassive black hole Sagittarius A*

Popis výsledku anglicky

High-velocity stars and peculiar G objects orbit the central supermassive black hole (SMBH) Sagittarius A* (Sgr A*). Together, the G objects and high-velocity stars constitute the S cluster. In contrast with theoretical predictions, no binary system near Sgr A* has been identified. Here, we report the detection of a spectroscopic binary system in the S cluster with the masses of the components of 2.80 +/- 0.50 M-circle dot and 0.73 +/- 0.14 M-circle dot, assuming an edge-on configuration. Based on periodic changes in the radial velocity, we find an orbital period of 372 +/- 3 days for the two components. The binary system is stable against the disruption by Sgr A* due to the semi-major axis of the secondary being 1.59 +/- 0.01 AU, which is well below its tidal disruption radius of approximately 42.4 AU. The system, known as D9, shows similarities to the G objects. We estimate an age for D9 of 2.7(-0.3)(+1.9)x10(6) yr that is comparable to the timescale of the SMBH-induced von Zeipel-Lidov-Kozai cycle period of about 106 yr, causing the system to merge in the near future. Consequently, the population of G objects may consist of pre-merger binaries and post-merger products. The detection of D9 implies that binary systems in the S cluster have the potential to reside in the vicinity of the supermassive black hole Sgr A* for approximately 106 years.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10308 - Astronomy (including astrophysics,space science)

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2024

Kód důvěrnosti údajů

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

Název periodika

Nature Communications

ISSN

2041-1723

e-ISSN

2041-1723

Svazek periodika

15

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

11

Strana od-do

10608

Kód UT WoS článku

001380143300003

EID výsledku v databázi Scopus

2-s2.0-85212440367