RESEARCH ARTICLE


New Distances to Four Supernova Remnants



S. Ranasinghe1, D. A. Leahy1, *, Wenwu Tian1, 2
1 Department of Physics & Astronomy, University of Calgary, Calgary, Alberta T2N 1N4, Canada
2 National Astronomical Observatories, CAS, Beijing 100012, China


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© 2018 Ranasinghe et al.

open-access license: This is an open access article distributed under the terms of the Creative Commons Attribution 4.0 International Public License (CC-BY 4.0), a copy of which is available at: https://creativecommons.org/licenses/by/4.0/legalcode. This license permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.

* Address correspondence to these authors at the Department of Physics & Astronomy, University of Calgary, Calgary, Alberta T2N 1N4, Canada; Tel: (403) 220-7192; E-mail: leahy@ucalgary.ca


Abstract

Object:

Distances are found for four supernova remnants without previous distance measurements. H I spectra and H I channel maps are used to determine the maximum velocity of H I absorption for the four Supernova Remnants (SNRs).

Method:

We examined 13CO emission spectra and channel maps to look for possible molecular gas associated with each SNR, but did not find any.

Result:

The resulting distances for the SNRs are 3.5 ± 0.2 kpc (G24.7+0.6), 4.7 ± 0.3 kpc (G29.6+0.1), 4.1 ± 0.5 kpc (G41.5+0.4) and 4.5 ± 0 .4 - 9.0 ± 0.4 kpc (G57.2+0.8).

Keywords: Radio continuum, Radio lines, Supernova remnants, ISM clouds, Kinematic distance, Galactic plane survey.