1 Department of Physics & Astronomy, University of Calgary, Calgary, Alberta T2N 1N4, Canada
2 National Astronomical Observatories, CAS, Beijing 100012, China
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).
We examined 13CO emission spectra and channel maps to look for possible molecular gas associated with each SNR, but did not find any.
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.
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: email@example.com