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Title:
Characteristics of the supernova remnant G351.7+0.8 and a distance argument against its association with PSR J1721-3532
Authors:
Tian, W. W.; Haverkorn, M.; Zhang, H. Y.
Affiliation:
AA(National Astronomical Observatories, CAS, Beijing 100012, China; Department of Physics & Astronomy, University of Calgary, Calgary, Alberta T2N 1N4, Canada), AB(Astronomy Department, University of California-Berkeley, 601 Campbell Hall, Berkeley, CA 94720, USA), AC(National Astronomical Observatories, CAS, Beijing 100012, China)
Publication:
Monthly Notices of the Royal Astronomical Society, Volume 378, Issue 4, pp. 1283-1286. (MNRAS Homepage)
Publication Date:
07/2007
Origin:
MNRAS
MNRAS Keywords:
pulsars: individual: PSR J1721-3532, supernovae: individual: G351.7+0.8, supernova remnants
DOI:
10.1111/j.1365-2966.2007.11613.x
Bibliographic Code:
2007MNRAS.378.1283T

Abstract

New images of the supernova remnant (SNR) G351.7+0.8 are presented based on 21-cm HI-line emission and continuum emission data from the Southern Galactic Plane Survey. SNR G351.7+0.8 has a flux density of 8.4 +/- 0.7Jy at 1420MHz. Its spectral index is 0.52 +/- 0.25 (S = v-α) between 1420 and 843 MHz, typical of adiabatically expanding shell-like remnants. HI observations show structures possibly associated with the SNR in the radial velocity range of -10 to -18kms-1, and suggest a distance of 13.2kpc and a radius of 30.7pc. The estimated Sedov age for G351.7+0.8 is less than 6.8×104 yr. A young radio pulsar PSR J1721-3532 lies close to SNR G351.7+0.8 on the sky. The new distance and age of G351.7+0.8 and recent proper motion measurements of the pulsar strongly argue against an association between SNR G351.7+0.8 and PSR J1721-3532. There is an unidentified, faint X-ray point source 1RXS J172055.3-353937 which is close to G351.7+0.8. This may be a neutron star potentially associated with G351.7+0.8.
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