Accretion of stellar winds in the galactic centre

J. Cuadra; S. Nayakshin; V. Springel; T. Di Matteo

doi:10.1007/978-3-540-74713-0_26

Accretion of stellar winds in the galactic centre

J. Cuadra, S. Nayakshin, V. Springel, T. Di Matteo

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

Abstract

We report a 3-dimensional numerical study of the accretion of stellar winds onto Sgr A*, the super-massive black hole at the centre of our Galaxy. Compared with previous investigations, we allow the stars to be on realistic orbits, include the recently discovered slow wind sources, and allow for optically thin radiative cooling. We find that the slow winds shock and rapidly cool, forming cold gas clumps and filaments that coexist with the hot X-ray emitting gas. The accretion rate in this case consists of two components: the hot quasi steady-state one, and the cold one that is highly variable on time-scales of tens to hundreds of years. Such variability can in principle lead to a strongly non-linear response through accretion flow physics not resolved here, making Sgr A* an important energy source for the Galactic centre.

Original language	English
Title of host publication	Relativistic Astrophysics Legacy and Cosmology - Einstein's
Subtitle of host publication	Proceedings of the MPE/USM/MPA/ESO Joint Astronomy Conference Held in Munich, Germany, 7-11 November 2005
Editors	Bernd Aschenbach, Vadim Burwitz, Gunther Hasinger, Bruno Leibundgut
Pages	115-119
Number of pages	5
DOIs	https://doi.org/10.1007/978-3-540-74713-0_26
State	Published - 2008
Externally published	Yes

Publication series

Name	ESO Astrophysics Symposia
Volume	2008
ISSN (Print)	1431-2433
ISSN (Electronic)	1611-6143

Access to Document

10.1007/978-3-540-74713-0_26

Cite this

Cuadra, J., Nayakshin, S., Springel, V., & Di Matteo, T. (2008). Accretion of stellar winds in the galactic centre. In B. Aschenbach, V. Burwitz, G. Hasinger, & B. Leibundgut (Eds.), Relativistic Astrophysics Legacy and Cosmology - Einstein's: Proceedings of the MPE/USM/MPA/ESO Joint Astronomy Conference Held in Munich, Germany, 7-11 November 2005 (pp. 115-119). (ESO Astrophysics Symposia; Vol. 2008). https://doi.org/10.1007/978-3-540-74713-0_26

Cuadra, J. ; Nayakshin, S. ; Springel, V. et al. / Accretion of stellar winds in the galactic centre. Relativistic Astrophysics Legacy and Cosmology - Einstein's: Proceedings of the MPE/USM/MPA/ESO Joint Astronomy Conference Held in Munich, Germany, 7-11 November 2005. editor / Bernd Aschenbach ; Vadim Burwitz ; Gunther Hasinger ; Bruno Leibundgut. 2008. pp. 115-119 (ESO Astrophysics Symposia).

@inproceedings{d59bdd6672b44cefb974bb77b95cc829,

title = "Accretion of stellar winds in the galactic centre",

abstract = "We report a 3-dimensional numerical study of the accretion of stellar winds onto Sgr A*, the super-massive black hole at the centre of our Galaxy. Compared with previous investigations, we allow the stars to be on realistic orbits, include the recently discovered slow wind sources, and allow for optically thin radiative cooling. We find that the slow winds shock and rapidly cool, forming cold gas clumps and filaments that coexist with the hot X-ray emitting gas. The accretion rate in this case consists of two components: the hot quasi steady-state one, and the cold one that is highly variable on time-scales of tens to hundreds of years. Such variability can in principle lead to a strongly non-linear response through accretion flow physics not resolved here, making Sgr A* an important energy source for the Galactic centre.",

author = "J. Cuadra and S. Nayakshin and V. Springel and {Di Matteo}, T.",

year = "2008",

doi = "10.1007/978-3-540-74713-0_26",

language = "English",

isbn = "3540747125",

series = "ESO Astrophysics Symposia",

pages = "115--119",

editor = "Bernd Aschenbach and Vadim Burwitz and Gunther Hasinger and Bruno Leibundgut",

booktitle = "Relativistic Astrophysics Legacy and Cosmology - Einstein's",

}

Cuadra, J, Nayakshin, S, Springel, V & Di Matteo, T 2008, Accretion of stellar winds in the galactic centre. in B Aschenbach, V Burwitz, G Hasinger & B Leibundgut (eds), Relativistic Astrophysics Legacy and Cosmology - Einstein's: Proceedings of the MPE/USM/MPA/ESO Joint Astronomy Conference Held in Munich, Germany, 7-11 November 2005. ESO Astrophysics Symposia, vol. 2008, pp. 115-119. https://doi.org/10.1007/978-3-540-74713-0_26

Accretion of stellar winds in the galactic centre. / Cuadra, J.; Nayakshin, S.; Springel, V. et al.
Relativistic Astrophysics Legacy and Cosmology - Einstein's: Proceedings of the MPE/USM/MPA/ESO Joint Astronomy Conference Held in Munich, Germany, 7-11 November 2005. ed. / Bernd Aschenbach; Vadim Burwitz; Gunther Hasinger; Bruno Leibundgut. 2008. p. 115-119 (ESO Astrophysics Symposia; Vol. 2008).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

TY - GEN

T1 - Accretion of stellar winds in the galactic centre

AU - Cuadra, J.

AU - Nayakshin, S.

AU - Springel, V.

AU - Di Matteo, T.

PY - 2008

Y1 - 2008

N2 - We report a 3-dimensional numerical study of the accretion of stellar winds onto Sgr A*, the super-massive black hole at the centre of our Galaxy. Compared with previous investigations, we allow the stars to be on realistic orbits, include the recently discovered slow wind sources, and allow for optically thin radiative cooling. We find that the slow winds shock and rapidly cool, forming cold gas clumps and filaments that coexist with the hot X-ray emitting gas. The accretion rate in this case consists of two components: the hot quasi steady-state one, and the cold one that is highly variable on time-scales of tens to hundreds of years. Such variability can in principle lead to a strongly non-linear response through accretion flow physics not resolved here, making Sgr A* an important energy source for the Galactic centre.

AB - We report a 3-dimensional numerical study of the accretion of stellar winds onto Sgr A*, the super-massive black hole at the centre of our Galaxy. Compared with previous investigations, we allow the stars to be on realistic orbits, include the recently discovered slow wind sources, and allow for optically thin radiative cooling. We find that the slow winds shock and rapidly cool, forming cold gas clumps and filaments that coexist with the hot X-ray emitting gas. The accretion rate in this case consists of two components: the hot quasi steady-state one, and the cold one that is highly variable on time-scales of tens to hundreds of years. Such variability can in principle lead to a strongly non-linear response through accretion flow physics not resolved here, making Sgr A* an important energy source for the Galactic centre.

UR - http://www.scopus.com/inward/record.url?scp=35648929435&partnerID=8YFLogxK

U2 - 10.1007/978-3-540-74713-0_26

DO - 10.1007/978-3-540-74713-0_26

M3 - Conference contribution

AN - SCOPUS:35648929435

SN - 3540747125

SN - 9783540747123

T3 - ESO Astrophysics Symposia

SP - 115

EP - 119

BT - Relativistic Astrophysics Legacy and Cosmology - Einstein's

A2 - Aschenbach, Bernd

A2 - Burwitz, Vadim

A2 - Hasinger, Gunther

A2 - Leibundgut, Bruno

ER -

Cuadra J, Nayakshin S, Springel V, Di Matteo T. Accretion of stellar winds in the galactic centre. In Aschenbach B, Burwitz V, Hasinger G, Leibundgut B, editors, Relativistic Astrophysics Legacy and Cosmology - Einstein's: Proceedings of the MPE/USM/MPA/ESO Joint Astronomy Conference Held in Munich, Germany, 7-11 November 2005. 2008. p. 115-119. (ESO Astrophysics Symposia). doi: 10.1007/978-3-540-74713-0_26

Accretion of stellar winds in the galactic centre

Abstract

Publication series

Access to Document

Fingerprint

Cite this