Astronomy and Astrophysics – Astrophysics
Scientific paper
Apr 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002aps..aprx11008g&link_type=abstract
American Physical Society, April Meeting, Jointly Sponsored with the High Energy Astrophysics Division (HEAD) of the American As
Astronomy and Astrophysics
Astrophysics
Scientific paper
We present a summary of Chandra monitoring observations of M31, and partial results of our HST program to search for UV counterparts to M31 X-ray Transients. The first 8 epochs of monitoring spread over nearly 2 years reveals more than a dozen transient sources, with peak luminosities ranging from 1 × 10^37ergs sec-1 to 3 × 10^38ergs sec-1. While no definitive UV counterparts have yet been found, the X-ray brightest of these transients has the strongest candidate counterpart. The discovery of repeated outbursts from two of the transients yields new direct information on duty cycles of transients in M31. An unremarkable source with LX ~ 10^37ergs sec-1 may be associated with the galaxy's nuclear supermassive black hole (M31*). The cool temperature of the diffuse gas in the core of M31 ( ~0.35 keV), along with the high mass of M31*, indicate a Bondi-Hoyle accretion radius of ~arc-second scale. As well as being the closest supermassive black holes, M31* and Sgr A* may be among the few with Bondi-Hoyle radii which are resolvable with X-ray observations . This work supported by NASA grants GO2-3103X and HST-GO-9087.
Barmby Pauline
Di Stefano Rosanne
Dosaj Anil
Garcia Murillo R.
Kong Albert
No associations
LandOfFree
Chandra Synoptic Observations of M31 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 Chandra Synoptic Observations of M31, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Chandra Synoptic Observations of M31 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1539889