Hubble Space Telescope Imaging of the Extremely Metal-Poor Galaxy SDSS J0133+1342

Details Hubble Space Telescope Imaging of the Extremely Metal-Poor Galaxy SDSS J0133+1342 Hubble Space Telescope Imaging of the Extremely Metal-Poor Galaxy SDSS J0133+1342

Dec 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aas...20516906c&link_type=abstract

American Astronomical Society Meeting 205, #169.06; Bulletin of the American Astronomical Society, Vol. 36, p.1623

Astronomy and Astrophysics

Astronomy

Scientific paper

We present deep U, narrow V and I-band images of the extremely metal-poor (12 + log(O/H) = 7.60) galaxy SDSSJ0133+1342 obtained with the Advanced Camera for Surveys of the Hubble Space Telescope. The images reveal the galaxy to have an irregular morphology and a maximum size of only ˜ 400 pc. However, it contains at least 17 globular clusters with a large range in color and luminosity, which together contribute approximately 15% of the galaxy's luminosity. The bluest and most luminous of these clusters have L > 106 Lsun and qualify as super star clusters. Using single-burst stellar population synthesis models of the appropriate metallicity, we find that the colors of the reddest clusters are best matched by stars ˜ 10 Gyr old; their colors cannot be produced by the reddening of younger and bluer stars for plausible amounts of dust. These results indicate that SDSS J0133+1342 has a complicated formation history, possibly as the result of a series of collisions between two or more small clumps of stars as they coalesce and eventually form a quiescent dwarf galaxy. The presence of evolved stars in this object indicates that, in contrast to recent results for I Zw 18, not all extremely metal-poor dwarf galaxies in the local universe are forming their first generation of stars. This work was supported by NASA through grant HST-GO-10180.06-A to the Space Telescope Science Institute.

Affiliated with

Also associated with

No associations

Rating

Hubble Space Telescope Imaging of the Extremely Metal-Poor Galaxy SDSS J0133+1342 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Hubble Space Telescope Imaging of the Extremely Metal-Poor Galaxy SDSS J0133+1342, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Hubble Space Telescope Imaging of the Extremely Metal-Poor Galaxy SDSS J0133+1342 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1645457