Ultra-Luminous X-ray Sources in the Collisional Ring Galaxy NGC 922

Details Ultra-Luminous X-ray Sources in the Collisional Ring Galaxy NGC 922 Ultra-Luminous X-ray Sources in the Collisional Ring Galaxy NGC 922

Jan 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010aas...21560614p&link_type=abstract

American Astronomical Society, AAS Meeting #215, #606.14; Bulletin of the American Astronomical Society, Vol. 36, p.1132

Astronomy and Astrophysics

Astronomy

Scientific paper

We present a new Chandra observation of the nearby collisional ring galaxy NGC 922. NGC 922 is undergoing a violent burst of star formation as density waves are driven through the disk as a result of the collision. It is similar to the famous Cartwheel galaxy, except that the metallicity is somewhat higher and star formation rate lower. Our primary science goal is to determine whether a low metallicty environment is required to form the most luminous X-ray sources (Lx>1E40 ergs s-1). We find a total of 14 bright X-ray sources, 7 of which are ULX ((Lx>1E39 ergs s-1). One source has Lx 1E40 ergs/s. The X-ray sources are associated with the H-alpha ring. However, they are NOT associated with the brightest H-alpha patches, suggesting that the ULX phase starts >1 x 1E7 years after the starburst. Like the Cartwheel, the X-ray luminosity function of NGC 922 has a slope close to that of the “cannonical” HMXB slope of Gilfanov et al 2004. We conclude that NGC 922 is forming ULX as efficiently as the Cartwheel (after allowing for the difference in the star formation rate). We do not see a strong metallicity effect.

Affiliated with

Also associated with

No associations

Rating

Ultra-Luminous X-ray Sources in the Collisional Ring Galaxy NGC 922 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 Ultra-Luminous X-ray Sources in the Collisional Ring Galaxy NGC 922, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Ultra-Luminous X-ray Sources in the Collisional Ring Galaxy NGC 922 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1888268