Science-advisor
REGISTER info/FAQ
Login
username
password
     
forgot password?
register here
 
Research articles
  search articles
  reviews guidelines
  reviews
  articles index
My Pages
my alerts
  my messages
  my reviews
  my favorites
 
 
Stat
Members: 3643
Articles: 2'487'895
Articles rated: 2609

28 March 2024
 
  » arxiv » astro-ph/0701154

 Article overview


Discovery of an Unusual Dwarf Galaxy in the Outskirts of the Milky Way
M.J. Irwin ; V. Belokurov ; N.W. Evans ; E.V. Ryan-Weber ; J.T.A. de Jong ; S. Koposov ; D.B. Zucker ; S.T. Hodgkin ; G. Gilmore ; P. Prema ; L. Hebb ; A. Begum ; M. Fellhauer ; P.C. Hewett ; R.C. Kennicutt, Jr. ; M.I. Wilkinson ; D.M. Bramich ; S. Vidrih ; H.-W. Rix ; T.C. Beers ; J.C. Barentine ; H. Brewington ; M. Harvanek ; J. Krzesinski ; D. Long ; A. Nitta ; S.A. Snedden ;
Date 5 Jan 2007
AbstractIn this Letter, we announce the discovery of a new dwarf galaxy, Leo T, in the Local Group. It was found as a stellar overdensity in the Sloan Digital Sky Survey Data Release 5 (SDSS DR5). The color-magnitude diagram of Leo T shows two well-defined features, which we interpret as a red giant branch and a sequence of young, massive stars. As judged from fits to the color-magnitude diagram, it lies at a distance of about 420 kpc and has an intermediate-age stellar population with a metallicity of [Fe/H]= -1.6, together with a young population of blue stars of age of 200 Myr. There is a compact cloud of neutral hydrogen with mass roughly 10^5 solar masses and radial velocity 35 km/s coincident with the object visible in the HIPASS channel maps. Leo T is the smallest, lowest luminosity galaxy found to date with recent star-formation. It appears to be a transition object similar to, but much lower luminosity than, the Phoenix dwarf.
Source arXiv, astro-ph/0701154
Services Forum | Review | PDF | Favorites   
 
Visitor rating: did you like this article? no 1   2   3   4   5   yes

No review found.
 Did you like this article?

This article or document is ...
important:
of broad interest:
readable:
new:
correct:
Global appreciation:

  Note: answers to reviews or questions about the article must be posted in the forum section.
Authors are not allowed to review their own article. They can use the forum section.

browser claudebot






ScienXe.org
» my Online CV
» Free


News, job offers and information for researchers and scientists:
home  |  contact  |  terms of use  |  sitemap
Copyright © 2005-2024 - Scimetrica