Published March 20, 2010 | Version v1
Journal article Metadata-only

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

Creators

  • 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)
  • 5. Space Science Division, Naval Research Laboratory, Washington, DC 20375-5352 (United States)

Description

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 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.

Availability note (English)

Available from http://dx.doi.org/10.1088/2041-8205/712/1/L5

Additional details

Identifiers

DOI
10.1088/2041-8205/712/1/L5;

Publishing Information

Journal Title
Astrophysical Journal Letters
Journal Volume
712
Journal Issue
1
Journal Page Range
p. L5-L9
ISSN
2041-8205

INIS

Country of Publication
United States
Country of Input or Organization
International Atomic Energy Agency (IAEA)
INIS RN
41049186
Subject category
S79: ASTROPHYSICS, COSMOLOGY AND ASTRONOMY;
Descriptors DEI
BRIGHTNESS; ELECTRONS; EMISSION; GALAXIES; PLASMA; POLARIZATION; RADIO TELESCOPES; STARS; TRANSIENTS
Descriptors DEC
ANTENNAS; ELECTRICAL EQUIPMENT; ELECTRONIC EQUIPMENT; ELEMENTARY PARTICLES; EQUIPMENT; FERMIONS; LEPTONS; OPTICAL PROPERTIES; PHYSICAL PROPERTIES; RADIO EQUIPMENT; TELESCOPES