Hostname: page-component-8448b6f56d-mp689 Total loading time: 0 Render date: 2024-04-16T00:16:34.982Z Has data issue: false hasContentIssue false
  • English
  • Français

The late-type stellar density profile in the Galactic Center: A statistical approach

Published online by Cambridge University Press:  09 February 2017

S. N. Chappell ,
A. M. Ghez ,
T. Do ,
G. D. Martinez ,
S. Yelda ,
B. N. Sitarski ,
J. R. Lu  and
M. R. Morris
S. N. Chappell
Affiliation:
UCLA, Department of Physics and Astronomy, Los Angeles, CA, 90095, USA
A. M. Ghez
Affiliation:
UCLA, Department of Physics and Astronomy, Los Angeles, CA, 90095, USA
T. Do
Affiliation:
UCLA, Department of Physics and Astronomy, Los Angeles, CA, 90095, USA
G. D. Martinez
Affiliation:
UCLA, Department of Physics and Astronomy, Los Angeles, CA, 90095, USA
S. Yelda
Affiliation:
UCLA, Department of Physics and Astronomy, Los Angeles, CA, 90095, USA
B. N. Sitarski
Affiliation:
UCLA, Department of Physics and Astronomy, Los Angeles, CA, 90095, USA
J. R. Lu
Affiliation:
Department of Astronomy, University of California, Berkeley Berkeley, CA, 94720, USA
M. R. Morris
Affiliation:
UCLA, Department of Physics and Astronomy, Los Angeles, CA, 90095, USA
Rights & Permissions [Opens in a new window]

Abstract

Core share and HTML view are not available for this content. However, as you have access to this content, a full PDF is available via the ‘Save PDF’ action button.

The late-type stellar population in the Galactic Center was first predicted to reside in a dynamically relaxed cusp (power law slope ranging from 3/2 to 7/4). However, other works - which rely on models to correct for projection effects - have suggested a flat distribution instead. The need for this correction is due to the lack of information regarding the line-of-sight distances. With a two decade long baseline in astrometric measurements, we are now able to measure significant projected radial accelerations, six of which are newly reported here, which directly constrain line-of-sight distances. Here we present a statistical approach to take advantage of this information and more accurately constrain the shape of the radial density profile of the late-type stellar population in the Galactic Center.

Keywords

Galaxy: centerstars: late-typetechniques: astrometrymethods: statistical
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 11 , Symposium S322: The Multi-Messenger Astrophysics of the Galactic Centre , July 2016 , pp. 235 - 236
Copyright
Copyright © International Astronomical Union 2017 

References

Bahcall, J. N. & Wolf, R. A. 1976, ApJ, 209, 214 CrossRefGoogle Scholar
Bahcall, J. N. & Wolf, R. A. 1977, ApJ, 216, 883 CrossRefGoogle Scholar
Bartko, H., Martins, F., Trippe, S., et al. 2010, ApJ, 708, 834 CrossRefGoogle Scholar
Buchholz, R. M., Schödel, R., & Eckart, A. 2009, A&A, 499, 483 Google Scholar
Do, T., Ghez, A. M., Morris, M. R., et al. 2009, ApJ, 703, 1323 CrossRefGoogle Scholar
Do, T., Lu, J. R., Ghez, A. M., et al. 2013, ApJ, 764, 154 CrossRefGoogle Scholar
Ghez, A. M., Salim, S., Weinberg, N. N., et al. 2008, ApJ 689 1044–1062 CrossRefGoogle Scholar
Schödel, R., Najarro, F., Muzic, K., & Eckart, A. 2010, A&A, 511, A18 Google Scholar
Yelda, S., Ghez, A. M., Lu, J. R., et al. 2014, ApJ, 783, 131 CrossRefGoogle Scholar