A Search for the Near-Infrared Counterpart to GCRT J1745-3009

Details A Search for the Near-Infrared Counterpart to GCRT J1745-3009 A Search for the Near-Infrared Counterpart to GCRT J1745-3009

2008-07-09

arxiv.org/abs/0807.1507v2

Astronomy and Astrophysics

Astrophysics

10 pages, 5 figures. Accepted for publication in the Astrophysical Journal

Scientific paper

10.1086/591436

We present an optical/near-infrared search for a counterpart to the perplexing radio transient GCRT J1745-3009, a source located ~1 degree from the Galactic Center. Motivated by some similarities to radio bursts from nearby ultracool dwarfs, and by a distance upper limit of 70 pc for the emission to not violate the 1e12 K brightness temperature limit for incoherent radiation, we searched for a nearby star at the position of GCRT J1745-3009. We found only a single marginal candidate, limiting the presence of any late-type star to >1 kpc (spectral types earlier than M9), >200 pc (spectral types L and T0-T4), and >100 pc (spectral types T4-T7), thus severely restricting the possible local counterparts to GCRT J1745-3009. We also exclude any white dwarf within 1 kpc or a supergiant star out to the distance of the Galactic Center as possible counterparts. This implies that GCRT J1745-3009 likely requires a coherent emission process, although whether or not it reflects a new class of sources is unclear.

Affiliated with

Also associated with

No associations

Rating

A Search for the Near-Infrared Counterpart to GCRT J1745-3009 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 the Near-Infrared Counterpart to GCRT J1745-3009, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A Search for the Near-Infrared Counterpart to GCRT J1745-3009 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-688494