Astronomy and Astrophysics – Astrophysics
Scientific paper
2006-09-05
Astronomy and Astrophysics
Astrophysics
Accepted for publication in A&A
Scientific paper
10.1051/0004-6361:20065959
ROSAT observations found no convincing evidence for X-ray sources located in local dwarf spheroidal galaxies (dSph). Now with more sensitive instruments on board Chandra and XMM-Newton we can reach fainter luminosity levels. We report on an observation of the Sagittarius (Sgr) dSph made using Chandra and an observation of the Carina (Car) dSph made using XMM-Newton. Our observations are sensitive to sources with X-ray luminosities in the 0.1-10 keV band of \~1x10^{32 ergs/s and 3x10^34 ergs/s for the Sgr and Car fields respectively. We have identified a total of 80 sources in the Sgr field and 53 sources in the Car field. Although the source numbers are roughly consistent with the expected number of background AGN, we found a small fraction of X-ray sources which were soft and could be located in the host dSph. Follow-up optical/IR observations may help to identify their optical counterparts and hence determine their nature.
Ramsay Gavin
Wu Ke
No associations
LandOfFree
A search for stellar X-ray sourcesin the Sagittarius and Carina dwarf galaxies - I: X-ray observations 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 A search for stellar X-ray sourcesin the Sagittarius and Carina dwarf galaxies - I: X-ray observations, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A search for stellar X-ray sourcesin the Sagittarius and Carina dwarf galaxies - I: X-ray observations will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-554311