Circularly polarized emission from the transient bursting radio source GCRT J1745-3009
arXiv:1001.5394 · doi:10.1088/2041-8205/712/1/L5
Abstract
We report detection of strong circularly polarized emission from the transient bursting source GCRT J1745-3009 based on new analysis of 325 MHz GMRT observations conducted on 28 September 2003. We place 8 Solar radius as the upper limit on the size of the emission region. The implied high brightness temperature required for an object beyond 1 pc and the high fraction of circular polarization firmly establish the emission as coherent. Electron cyclotron or plasma emission from a highly subsolar magnetically dominated dwarf located less than 4 kpc away could have given rise to the GCRT radio emission.
17 pages, 3 figures, accepted for publication in ApJ Letters
References in corpus (5)
- Periodic Bursts of Coherent Radio Emission from an Ultracool Dwarf
- The Monitor project: Rotation of low-mass stars in the open cluster NGC 2547
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