The Apparent Tail of the Galactic Center Object G2/DSO

J 2021

The Apparent Tail of the Galactic Center Object G2/DSO

PEISSKER, Florian, Michal ZAJAČEK, Andreas ECKART, Basel ALI, Vladimír KARAS et. al.

Základní údaje

Originální název

The Apparent Tail of the Galactic Center Object G2/DSO

Autoři

PEISSKER, Florian (garant), Michal ZAJAČEK (703 Slovensko, domácí), Andreas ECKART, Basel ALI, Vladimír KARAS, Nadeen B. SABHA, Rebekka GRELLMANN, Lucas LABADIE a Banafsheh SHAHZAMANIAN

Vydání

The Astrophysical Journal, IOP Publishing, 2021, 0004-637X

Další údaje

Jazyk

angličtina

Typ výsledku

Článek v odborném periodiku

Obor

10308 Astronomy

Stát vydavatele

Spojené státy

Utajení

není předmětem státního či obchodního tajemství

Odkazy

URL

Impakt faktor

Impact factor: 5.521

Kód RIV

RIV/00216224:14310/21:00119423

Organizační jednotka

Přírodovědecká fakulta

DOI

http://dx.doi.org/10.3847/1538-4357/ac23df

UT WoS

000728952600001

Klíčová slova anglicky

Galactic center; Supermassive black holes; Young stellar objects; Galaxy circumnuclear disk; Pre-main sequence stars

Štítky

rivok

Příznaky

Mezinárodní význam, Recenzováno

Změněno: 20. 4. 2022 18:57, Mgr. Marie Šípková, DiS.

Anotace

V originále

Observations of the near-infrared excess object G2/DSO increased attention toward the Galactic center and its vicinity. The predicted flaring event in 2014 and the outcome of the intense monitoring of the supermassive black hole in the center of our Galaxy did not fulfill all predictions about a significantly enhanced accretion event. Subsequent observations addressed the question concerning the nature of the object because of its compact shape, especially during its periapse in 2014. Theoretical approaches have attempted to answer the contradictory behavior of the object, resisting the expected dissolution of a gaseous cloud due to tidal forces in combination with evaporation and hydrodynamical instabilities. However, assuming that the object is instead a dust-enshrouded young stellar object seems to be in line with the predictions of several groups and observations presented in numerous publications. Here we present a detailed overview and analysis of the observations of the object that have been performed with SINFONI (VLT) and we provide a comprehensive approach to clarify the nature of G2/DSO. We show that the tail emission consists of two isolated and compact sources with different orbital elements for each source rather than an extended and stretched component as it appeared in previous representations of the same data. Considering our recent publications, we propose that the monitored dust-enshrouded objects are remnants of a dissolved young stellar cluster whose formation was initiated in the circumnuclear disk. This indicates a shared history, which agrees with our analysis of the D- and X-sources.

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

PEISSKER, Florian, Michal ZAJAČEK, Andreas ECKART, Basel ALI, Vladimír KARAS, Nadeen B. SABHA, Rebekka GRELLMANN, Lucas LABADIE a Banafsheh SHAHZAMANIAN. The Apparent Tail of the Galactic Center Object G2/DSO. The Astrophysical Journal. IOP Publishing, 2021, roč. 923, č. 1, s. 1-34. ISSN 0004-637X. Dostupné z: https://dx.doi.org/10.3847/1538-4357/ac23df.

@article{1809917,
   author = {Peißker, Florian and Zajaček, Michal and Eckart, Andreas and Ali, Basel and Karas, Vladimír and Sabha, Nadeen B. and Grellmann, Rebekka and Labadie, Lucas and Shahzamanian, Banafsheh},
   article_number = {1},
   doi = {http://dx.doi.org/10.3847/1538-4357/ac23df},
   keywords = {Galactic center; Supermassive black holes; Young stellar objects; Galaxy circumnuclear disk; Pre-main sequence stars},
   language = {eng},
   issn = {0004-637X},
   journal = {The Astrophysical Journal},
   title = {The Apparent Tail of the Galactic Center Object G2/DSO},
   url = {https://iopscience.iop.org/article/10.3847/1538-4357/ac23df},
   volume = {923},
   year = {2021}
}

TY  - JOUR
ID  - 1809917
AU  - Peißker, Florian - Zajaček, Michal - Eckart, Andreas - Ali, Basel - Karas, Vladimír - Sabha, Nadeen B. - Grellmann, Rebekka - Labadie, Lucas - Shahzamanian, Banafsheh
PY  - 2021
TI  - The Apparent Tail of the Galactic Center Object G2/DSO
JF  - The Astrophysical Journal
VL  - 923
IS  - 1
SP  - 1-34
EP  - 1-34
PB  - IOP Publishing
SN  - 0004637X
KW  - Galactic center
KW  - Supermassive black holes
KW  - Young stellar objects
KW  - Galaxy circumnuclear disk
KW  - Pre-main sequence stars
UR  - https://iopscience.iop.org/article/10.3847/1538-4357/ac23df
N2  - Observations of the near-infrared excess object G2/DSO increased attention toward the Galactic center and its vicinity. The predicted flaring event in 2014 and the outcome of the intense monitoring of the supermassive black hole in the center of our Galaxy did not fulfill all predictions about a significantly enhanced accretion event. Subsequent observations addressed the question concerning the nature of the object because of its compact shape, especially during its periapse in 2014. Theoretical approaches have attempted to answer the contradictory behavior of the object, resisting the expected dissolution of a gaseous cloud due to tidal forces in combination with evaporation and hydrodynamical instabilities. However, assuming that the object is instead a dust-enshrouded young stellar object seems to be in line with the predictions of several groups and observations presented in numerous publications. Here we present a detailed overview and analysis of the observations of the object that have been performed with SINFONI (VLT) and we provide a comprehensive approach to clarify the nature of G2/DSO. We show that the tail emission consists of two isolated and compact sources with different orbital elements for each source rather than an extended and stretched component as it appeared in previous representations of the same data. Considering our recent publications, we propose that the monitored dust-enshrouded objects are remnants of a dissolved young stellar cluster whose formation was initiated in the circumnuclear disk. This indicates a shared history, which agrees with our analysis of the D- and X-sources.
ER  -

PEISSKER, Florian, Michal ZAJAČEK, Andreas ECKART, Basel ALI, Vladimír KARAS, Nadeen B. SABHA, Rebekka GRELLMANN, Lucas LABADIE a Banafsheh SHAHZAMANIAN. The Apparent Tail of the Galactic Center Object G2/DSO. \textit{The Astrophysical Journal}. IOP Publishing, 2021, roč.~923, č.~1, s.~1-34. ISSN~0004-637X. Dostupné z: https://dx.doi.org/10.3847/1538-4357/ac23df.

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