Hostname: page-component-cd9895bd7-8ctnn Total loading time: 0 Render date: 2024-12-30T16:31:18.168Z Has data issue: false hasContentIssue false
  • English
  • Français

Chemical Fingerprinting and Chemical Analysis of Galactic Halo Substructure

Published online by Cambridge University Press:  09 March 2010

Steven R. Majewski ,
Mei-Yin Chou ,
Katia Cunha ,
Verne V. Smith ,
Richard J. Patterson  and
David Martínez-Delgado
Steven R. Majewski
Affiliation:
Dept. of Astronomy, University of Virginia, Charlottesville, VA 22904-4325, USA
Mei-Yin Chou
Affiliation:
Dept. of Astronomy, University of Virginia, Charlottesville, VA 22904-4325, USA
Katia Cunha
Affiliation:
National Optical Astronomy Observatories, PO Box 26732, Tucson, AZ 85726, USA
Verne V. Smith
Affiliation:
National Optical Astronomy Observatories, PO Box 26732, Tucson, AZ 85726, USA
Richard J. Patterson
Affiliation:
Dept. of Astronomy, University of Virginia, Charlottesville, VA 22904-4325, USA
David Martínez-Delgado
Affiliation:
Instituto de Astrofisica de Canarias, La Laguna, Spain
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 present high-resolution spectroscopic measurements of the abundances of the α-like element titanium (Ti) and s-process elements yttrium (Y) and lanthanum (La) for M giant candidates of (a) the Sagittarius (Sgr) dwarf spheroidal + tidal tail system, (b) the Triangulum-Andromeda (TriAnd) Star Cloud, and (c) the Galactic Anticenter Stellar Structure (GASS, or Monoceros Stream). All three systems show abundance patterns unlike the Milky Way but typical of dwarf galaxies. The Sgr system abundance patterns resemble those of the Large Magellanic Cloud. GASS/Mon chemically resembles Sgr but is distinct from TriAnd, a result that does not support previous suggestions that TriAnd is a piece of the Monoceros Stream.

Keywords

galaxies: interactionsGalaxy: haloGalaxy: structurestars: abundances
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 5 , Symposium S265: Chemical Abundances in the Universe: Connecting First Stars to Planets , August 2009 , pp. 364 - 365
Copyright
Copyright © International Astronomical Union 2010

References

Chou, M.-Y., et al. 2007, ApJ, 670, 346CrossRefGoogle Scholar
Chou, M.-Y., et al. 2009, ApJ, submittedGoogle Scholar
Monaco, L., et al. 2005, A&A, 441, 141Google Scholar
Peñarrubia, J., et al. 2005, ApJ, 626, 128Google Scholar
Sbordone, L., et al. 2007, A&A, 465, 815Google Scholar