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

29 March 2024
 
  » arxiv » astro-ph/0411319

 Article overview


UV emission and Star Formation in Stephan's Quintet
C. Kevin Xu ; Jorge Iglesias-Paramo ; Denis Burgarella ; R. Michael Rich ; Susan G. Neff ; Sebastien Lauger ; Tom A. Barlow ; Luciana Bianchi ; Yong-Ik Byun ; Karl Forster ; Peter G. Friedman ; Timothy M. Heckman ; Patrick N. Jelinsky ; Young-Wook Lee ; Barry F. Madore ; Roger F. Malina ; D. Christopher Martin ; Bruno Milliard ; Patrick Morrissey ; David Schiminovich ; Oswald H. W. Siegmund ; Todd Small ; Alex S. Szalay ; Barry Y. Welsh ; Ted K. Wyder ;
Date 12 Nov 2004
Journal Astrophys.J. 619 (2005) L95-L98
Subject astro-ph
Abstractwe present the first GALEX UV images of the well known interacting group of galaxies, Stephan’s Quintet (SQ). We detect widespread UV emission throughout the group. However, there is no consistent coincidence between UV structure and emission in the optical, Halpha, or HI. Excluding the foreground galaxy NGC7320 (Sd), most of the UV emission is found in regions associated with the two spiral members of the group, NGC7319 and NGC7318b, and the intragroup medium starburst SQ-A. The extinction corrected UV data are analyzed to investigate the overall star formation activity in SQ. It is found that the total star formation rate (SFR) of SQ is 6.69+-0.65 M_sun/yr. Among this, 1.34+-0.16 M_sun/yr is due to SQ-A. This is in excellent agreement with that derived from extinction corrected Halpha luminosity of SQ-A. The SFR in regions related to NGC 7319 is 1.98+-0.58 M_sun/yr, most of which(68%) is contributed by the disk. The contribution from the ’young tail’ is only 15%. In the UV, the ’young tail’ is more extended (~100 kpc) and shows a loop-like structure, including the optical tail, the extragalactic HII regions recently discovered in Halpha, and other UV emission regions discovered for the first time. The UV and optical colors of the ’old tail’ are consistent with a single stellar population of age t ~10^{8.5+-0.4} yrs. The UV emission associated with NGC 7318b is found in a very large (~80 kpc) disk, with a net SFR of 3.37+-0.25 M_sun/yr. Several large UV emission regions are 30 -- 40 kpc away from the nucleus of NGC7318b. Although both NGC7319 and NGC7318b show peculiar UV morphology, their SFR is consistent with that of normal Sbc galaxies, indicating that the strength of star formation activity is not enhenced by interactions.
Source arXiv, astro-ph/0411319
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