The abundance spread in the Bootes I dwarf spheroidal galaxy

Astronomy and Astrophysics – Astrophysics – Galaxy Astrophysics

Scientific paper

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

12 pages, 2 figures. Published in the Astrophysical Journal Letters. An erratum is in press and included here as an Appendix (

Scientific paper

10.1086/595962 10.1088/0004-637X

We present medium-resolution spectra of 16 radial velocity red-giant members of the low-luminosity Bootes I dwarf spheroidal (dSph) galaxy, that have sufficient S/N for abundance determination, based on the strength of the Ca II K line. Assuming [Ca/Fe] ~ +0.3, the abundance range in the sample is Delta [Fe/H] ~ 1.7 dex, with one star having [Fe/H] = -3.4. The dispersion is sigma([Fe/H]) = 0.45 +/- 0.08 -- similar to those of the Galaxy's more luminous dSph systems and Omega Centauri. This suggests that the large mass (greater than approximately 10 million solar masses) normally assumed to foster self-enrichment and the production of chemical abundance spreads was provided by the non-baryonic material in Bootes I.

No associations

LandOfFree

Say what you really think

Search LandOfFree.com for scientists and scientific papers. Rate them and share your experience with other people.

Rating

The abundance spread in the Bootes I dwarf spheroidal galaxy 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 The abundance spread in the Bootes I dwarf spheroidal galaxy, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The abundance spread in the Bootes I dwarf spheroidal galaxy will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFWR-SCP-O-571223

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.