On the origin of young stars at the Galactic center

Ann Marie Madigan; Oliver Pfuhl; Yuri Levin; Stefan Gillessen; Reinhard Genzel; Hagai Perets

doi:10.1017/S1743921314000659

On the origin of young stars at the Galactic center

Ann Marie Madigan, Oliver Pfuhl, Yuri Levin, Stefan Gillessen, Reinhard Genzel, Hagai Perets

Technion - Israel Institute of Technology

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

Abstract

The center of our Galaxy is home to a massive black hole, Sgr A*, and a nuclear star cluster containing stellar populations of various ages. While the late type stars may be too old to have retained memory of their initial orbital configuration, and hence formation mechanism, the kinematics of the early type stars should reflect their original distribution. In this contribution we present a new statistic which uses directly-observable kinematic stellar data to infer orbital parameters for stellar populations, and is capable of distinguishing between different origin scenarios. We use it on a population of B-stars in the Galactic center that extends out to large radii (~0.5 pc) from the massive black hole. We find that the high K-magnitude population (≲15 M_⊙) form an eccentric distribution, suggestive of a Hills binary-disruption origin.

Original language	English
Title of host publication	The Galactic Center: Feeding and Feedback in a Normal Galactic Nucleus
Editors	Loránt O. Sjouwerman, Cornelia C. Lang, Jürgen Ott
Pages	238-241
Number of pages	4
Volume	9
Edition	S303
DOIs	https://doi.org/10.1017/S1743921314000659
State	Published - May 2014
Event	The 303rd Symposium of The International Astronomical Uniom : The galactic center : feeding and feedback in a normal galactic nucleus - SANTA FE, NM, USA, Santa Fe, United States Duration: 30 Sep 2013 → 4 Oct 2013 Conference number: 303 https://www.iau.org/science/meetings/past/symposia/1068/

Publication series

Name	Proceedings of the International Astronomical Union
Publisher	Cambridge University Press

Conference

Conference	The 303rd Symposium of The International Astronomical Uniom
Abbreviated title	IAUS
Country/Territory	United States
City	Santa Fe
Period	30/09/13 → 4/10/13
Internet address	https://www.iau.org/science/meetings/past/symposia/1068/

All Science Journal Classification (ASJC) codes

Public Health, Environmental and Occupational Health
Astronomy and Astrophysics
Nutrition and Dietetics
Medicine (miscellaneous)
Space and Planetary Science

Access to Document

10.1017/S1743921314000659

Cite this

Madigan, A. M., Pfuhl, O., Levin, Y., Gillessen, S., Genzel, R., & Perets, H. (2014). On the origin of young stars at the Galactic center. In L. O. Sjouwerman, C. C. Lang, & J. Ott (Eds.), The Galactic Center: Feeding and Feedback in a Normal Galactic Nucleus (S303 ed., Vol. 9, pp. 238-241). (Proceedings of the International Astronomical Union). https://doi.org/10.1017/S1743921314000659

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title = "On the origin of young stars at the Galactic center",

abstract = "The center of our Galaxy is home to a massive black hole, Sgr A*, and a nuclear star cluster containing stellar populations of various ages. While the late type stars may be too old to have retained memory of their initial orbital configuration, and hence formation mechanism, the kinematics of the early type stars should reflect their original distribution. In this contribution we present a new statistic which uses directly-observable kinematic stellar data to infer orbital parameters for stellar populations, and is capable of distinguishing between different origin scenarios. We use it on a population of B-stars in the Galactic center that extends out to large radii (\textasciitilde{}0.5 pc) from the massive black hole. We find that the high K-magnitude population (≲15 M⊙) form an eccentric distribution, suggestive of a Hills binary-disruption origin.",

author = "Madigan, \{Ann Marie\} and Oliver Pfuhl and Yuri Levin and Stefan Gillessen and Reinhard Genzel and Hagai Perets",

year = "2014",

month = may,

doi = "10.1017/S1743921314000659",

language = "الإنجليزيّة",

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series = "Proceedings of the International Astronomical Union",

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editor = "Sjouwerman, \{Lor{\'a}nt O.\} and Lang, \{Cornelia C.\} and J{\"u}rgen Ott",

booktitle = "The Galactic Center: Feeding and Feedback in a Normal Galactic Nucleus",

edition = "S303",

note = "The 303rd Symposium of The International Astronomical Uniom<br/><br/> ; Conference date: 30-09-2013 Through 04-10-2013",

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}

Madigan, AM, Pfuhl, O, Levin, Y, Gillessen, S, Genzel, R & Perets, H 2014, On the origin of young stars at the Galactic center. in LO Sjouwerman, CC Lang & J Ott (eds), The Galactic Center: Feeding and Feedback in a Normal Galactic Nucleus. S303 edn, vol. 9, Proceedings of the International Astronomical Union, pp. 238-241, The 303rd Symposium of The International Astronomical Uniom

, Santa Fe, New Mexico, United States, 30/09/13. https://doi.org/10.1017/S1743921314000659

On the origin of young stars at the Galactic center. / Madigan, Ann Marie; Pfuhl, Oliver; Levin, Yuri et al.
The Galactic Center: Feeding and Feedback in a Normal Galactic Nucleus. ed. / Loránt O. Sjouwerman; Cornelia C. Lang; Jürgen Ott. Vol. 9 S303. ed. 2014. p. 238-241 (Proceedings of the International Astronomical Union).

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

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AB - The center of our Galaxy is home to a massive black hole, Sgr A*, and a nuclear star cluster containing stellar populations of various ages. While the late type stars may be too old to have retained memory of their initial orbital configuration, and hence formation mechanism, the kinematics of the early type stars should reflect their original distribution. In this contribution we present a new statistic which uses directly-observable kinematic stellar data to infer orbital parameters for stellar populations, and is capable of distinguishing between different origin scenarios. We use it on a population of B-stars in the Galactic center that extends out to large radii (~0.5 pc) from the massive black hole. We find that the high K-magnitude population (≲15 M⊙) form an eccentric distribution, suggestive of a Hills binary-disruption origin.

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ER -

On the origin of young stars at the Galactic center

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