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- W1972169267 abstract "We present an optical/near-infrared search for a counterpart to the perplexing radio transient GCRT J1745–3009, a source located ~1° 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 1012 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." @default.
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- W1972169267 date "2008-11-01" @default.
- W1972169267 modified "2023-09-23" @default.
- W1972169267 title "A Search for the Near‐Infrared Counterpart to GCRT J1745−3009" @default.
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- W1972169267 doi "https://doi.org/10.1086/591436" @default.
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