Hostname: page-component-7479d7b7d-8zxtt Total loading time: 0 Render date: 2024-07-11T22:24:01.312Z Has data issue: false hasContentIssue false
  • English
  • Français

The kinematics and chemistry of the Sagittarius streams

Published online by Cambridge University Press:  26 February 2013

Weibin Shi ,
Yuqin Chen ,
Kenneth Carrell  and
Gang Zhao
Weibin Shi
Affiliation:
Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China email: swb@sdu.edu.cn Shandong Provincial Key Laboratory of Optical Astronomy and the Solar–Terrestrial Environment, School of Space Science and Physics, Shandong University at Weihai, Weihai 264209, China
Yuqin Chen
Affiliation:
Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China email: swb@sdu.edu.cn
Kenneth Carrell
Affiliation:
Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China email: swb@sdu.edu.cn
Gang Zhao
Affiliation:
Key Laboratory of Optical Astronomy, National Astronomical Observatories, Chinese Academy of Sciences, Beijing 100012, China email: swb@sdu.edu.cn Shandong Provincial Key Laboratory of Optical Astronomy and the Solar–Terrestrial Environment, School of Space Science and Physics, Shandong University at Weihai, Weihai 264209, China
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.

We selected red horizontal-branch stars along the streams of the Sagittarius dwarf galaxy (Sgr) from sdss DR7 spectroscopic data using a theoretical model. We investigate the metallicity distribution of stars in the Sgr streams. The metallicity gradient is (−1.8 ± 0.3) × 10⊃3 dex deg−1 in the first wrap of the trailing arm and (−1.5 ± 0.4) × 10−3 dex deg−1 in the first wrap of the leading arm.

Keywords

Galaxy: halostars: horizontal-branch
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 8 , Symposium S289: Advancing the Physics of Cosmic Distances , August 2012 , pp. 422 - 424
Copyright
Copyright © International Astronomical Union 2013

References

Chen, Y. Q., Zhao, G., Zhao, J. Z., et al. 2010, AJ, 140, 500CrossRefGoogle Scholar
Chou, M., Cunha, K., Majewski, S. R., et al. 2010, ApJ, 708, 1290Google Scholar
Law, D. & Majewski, S. 2010, ApJ, 714, 229CrossRefGoogle Scholar
Zhao, G., Chen, Y. Q., Shi, J. R., et al. 2006, ChJAA, 6, 265Google Scholar