CIRCULARLY POLARIZED EMISSION FROM THE TRANSIENT BURSTING RADIO SOURCE GCRT J1745 - 3009

Journal Article · Sat Mar 20 00:00:00 EDT 2010 · Astrophysical Journal Letters

DOI:https://doi.org/10.1088/2041-8205/712/1/L5; COUNTRY OF INPUT: INTERNATIONAL ATOMIC ENERGY AGENCY (IAEA)· OSTI ID:21305097

Roy, Subhashis ^[1]; Hyman, Scott D ^[2]; Pal, Sabyasachi ^[3]; Lazio, T Joseph W.; Kassim, Namir E ^[4]

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1. NCRA-TIFR, Pune 411 007 (India)
2. Department of Physics and Engineering, Sweet Briar College, Sweet Briar, VA 24595 (United States)
3. International Centre for Radio Astronomy Research, University of Western Australia, 35 Stirling Highway, Crawley 6009 (Australia)
4. Remote Sensing Division, Naval Research Laboratory, Washington, DC 20375-5351 (United States)

We report on the detection of strong circularly polarized emission from the transient bursting source GCRT J1745 - 3009 based on new analysis of 325 MHz Giant Metrewave Radio Telescope observations conducted on 2003 September 28. We place 8 R {sub sun} 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 {<=}4 kpc away could have given rise to the GCRT radio emission.

• OSTI ID: 21305097
• Journal Information: Astrophysical Journal Letters, Vol. 712, Issue 1; Other Information: DOI: 10.1088/2041-8205/712/1/L5; Country of input: International Atomic Energy Agency (IAEA); ISSN 2041-8205
• Country of Publication: United States
• Language: English

Related Subjects

79 ASTROPHYSICS
COSMOLOGY AND ASTRONOMY
99 GENERAL AND MISCELLANEOUS//MATHEMATICS, COMPUTING, AND INFORMATION SCIENCE
BRIGHTNESS
ELECTRONS
EMISSION
GALAXIES
PLASMA
POLARIZATION
RADIO TELESCOPES
STARS
TRANSIENTS