Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aas...205.1108a&link_type=abstract
American Astronomical Society Meeting 205, #11.08; Bulletin of the American Astronomical Society, Vol. 36, p.1353
Astronomy and Astrophysics
Astronomy
Scientific paper
In early December 2004, Chandra and the Australian Telescope Compact Array will observe the nearest brown dwarf, ɛ Ind B, in X-rays and in the radio, respectively. We will present the first results of this simultaneous campaign. ɛ Ind B consists of a pair of T1+T6 brown dwarfs at a distance of 3.6 parsecs. Our 70 ks-long X-ray observation will reach down to log L X/L bol = -4.9 and -4.2 for the T1 and T6 components, respectively, whereas the ATCA should reach ˜ 20 μ Jy/beam at 4.8 and 8.6 GHz in its 6D array configuration. Brown dwarfs are very cool (T eff ˜ 1000 K for a T-type brown dwarf) and, therefore, they have predominantly neutral photospheres. Signatures of magnetic activity is thus not expected. Nevertheless, Hα and radio detections of L-type brown dwarfs have been reported (no detection of a L/T brown dwarf has been reported in X-rays yet). The detection of a T-type brown dwarf in the radio and X-ray regimes can open a new window to the study of magnetic activity beyond the main sequence.
M.A. acknowledges support from SAO grant GO4-5002X.
Audard Marc
Briggs Kevin R.
Brown Adrian
Gizis John E.
Güdel Manuel
No associations
LandOfFree
A deep look at our nearest brown dwarf, ɛ Ind B, in X-rays and radio 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 deep look at our nearest brown dwarf, ɛ Ind B, in X-rays and radio, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A deep look at our nearest brown dwarf, ɛ Ind B, in X-rays and radio will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1635909