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20 April 2024 |
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A Bursting Radio Transient in the Direction of the Galactic Center | | Paul S. Ray
; Scott D. Hyman
; T. Joseph Lazio
; Namir E. Kassim
; Subhashis Roy
; David L. Kaplan
; Deepto Chakrabarty
; | | Date: |
13 Aug 2008 | | Abstract: | The radio sky is poorly sampled for rapidly varying transients because of the
narrow field-of-view of most imaging radio telescopes at cm and shorter
wavelengths. The emergence of sensitive long wavelength observations with
intrinsically larger fields-of-view are changing this situation, as partly
illustrated by our ongoing meter-wavelength monitoring observations and
archival studies of the Galactic Center. In this search, we discovered a
transient, bursting, radio source in the direction of the Galactic Center, GCRT
J1745-3009, with extremely unusual properties. Its flux and rapid variability
imply a brightness temperature >10^12 K if it is at a distance >70 pc, implying
that it is a coherent emitter. I will discuss the discovery of the source and
the subsequent re-detections, as well as searches for counterparts at other
wavelengths, and several proposed models. | | Source: | arXiv, 0808.1899 | | Services: | Forum | Review | PDF | Favorites | |
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