http://arxiv.org/abs/1712.04423
Accurate distances to supernova remnants (SNRs) are crucial in determining their size, age, luminosity and evolutionary state. To determine distances, we chose four SNRs from the VLA Galactic Plane Survey (VGPS) for extraction of HI absorption spectra. Analysing HI absorption spectra, $^{13}$CO emission spectra, and HI and $^{13}$CO channel maps, kinematic velocities (or their limits) to the four SNRs were calculated. The four SNRs are probably associated with molecular clouds and the new distance to G$20.4+0.1$, G$24.7-0.6$, G$28.6-0.1$ and G$42.0-0.1$ are $7.8 \pm0.2$ kpc, $3.8\pm 0.2 $ kpc, $ 9.6 \pm 0.3 $ kpc and $ 3.5 \pm 0.4 $ kpc, respectively.
S. Ranasinghe and D. Leahy
Wed, 13 Dec 17
23/84
Comments: 14 pages, 16 figures