Supernova remnant candidates for the soft gamma-ray repeater 1900+14

Abstract

view Abstract Citations (85) References (23) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Supernova Remnant Candidates for the Soft gamma -Ray Repeater 1900+14 Vasisht, G. ; Kulkarni, S. R. ; Frail, D. A. ; Greiner, J. Abstract Motivated by the association of two soft gamma-ray repeaters (SGRs) with supernova remnants (SNR) we have carried out radio, optical and X-ray studies of two cataloged SNRs in the large KONUS error box 11 deg x 8 min of SGR 1900+14. Our very large array (VLA) observations of SNR G43.9+1.6 do not reveal any obvious plerionic component. A radio flat-spectrum source, close to, but outside the error box was found. We suggest this to be a distant H II region foreground to the SNR. A sensitive VLA image at meter wavelengths show that the other SNR, G42.8+0.6, is an ordinary typical SNR with a shell morphology with no peculiarities such as a plerionic component. No ROSAT source with an apparent flux greater than or approximately 10-13 ergs cm-2 s-1 is found within the two SNRs. Recently, Hurley et al. have reported a new very small error box close to G42.8+0.6. There is no radio feature within or close to the error box. However, a ROSAT source is found just outside this localization. We speculate that this is the quiescent X-ray counterpart of SGR 1900+14. We suggest that SGR 1900+14 is a neutron star that was born with high speed which has now overtaken the expanding shell of SNR G42.8+0.6. Owing to the low confining pressure, there has been no development of a synchrotron bubble which explains the absence of the radio plerion. In our picture, SGR 1900+14 is the oldest known SGR. Publication: The Astrophysical Journal Pub Date: August 1994 DOI: 10.1086/187466 Bibcode: 1994ApJ...431L..35V Keywords: Gamma Ray Bursts; Radio Emission; Radio Sources (Astronomy); Supernova Remnants; Supernovae; Astronomical Catalogs; Calorimeters; Rosat Mission; Stellar Luminosity; Astrophysics; GAMMA RAYS: BURSTS; ISM: INDIVIDUAL ALPHANUMERIC: G43.9; 1.6; ISM: INDIVIDUAL ALPHANUMERIC: G42.8-0.6; ISM: SUPERNOVA REMNANTS full text sources ADS | data products SIMBAD (14)