The Kinematic Distances of SNR G16.7+0.1 and G15.9+0.2 by Analyzing H i Absorption Spectra

2019/07/29 by W. W. Tian, H. Zhu, M. F. Zhang +3
Physics and Astronomy · #Absorption (acoustics) #Astronomy and Astrophysical Research #Astrophysics and Cosmic Phenomena #Astrophysics and Star Formation Studies #Kinematics #Maser #Shock (circulatory) #Spectral line #Supernova #Supernova remnant #astro-ph.GA

paper · pdf · doi:10.1088/1538-3873/ab35f4

12 pages, 7 figures. Accepted for publication in PASP

arxiv created 2019/07/29 · openalex created_date 2019/08/13 · openalex publication_date 2019/09/19 · arxiv updated 2019/09/25 · openalex updated_date 2026/08/06

Abstract

We build H i absorption spectra toward Supernova Remnant (SNRs) G16.7+0.1 and G15.9+0.2 using the THOR survey data. With the absorption spectra, we give a new distance range of 7–16 kpc for G15.9+0.2. We also resolve the near/far-side distance ambiguity of G16.7+0.1 and confirm its kinematic distance of about 14 kpc. In addition, we analyze the CO ( J = 3–2) spectra toward G16.7+0.1 and find obvious CO emission at the 20 km s −1 OH 1720 MHz maser site. This supports Reynoso & Mangum suggestions that the velocity difference between the maser and southern molecular cloud is caused by the shock acceleration. We discuss the impact of the distances on other physical parameters of the two SNRs.

Citations

• A New Young Galactic Supernova Remnant Containing a Compact Object: G15.9+0.2
• The Distance to the Perseus Spiral Arm in the Milky Way
• The Southern Galactic Plane Survey: H i Observations and Analysis
• H I in the Galaxy
• The distances of supernova remnants Kes 69 and G21.5–0.9 from Hi and 13CO spectra
• The distance of the SNR Kes 75 and PWN PSR J1846-0258 system
• A Survey of Hydroxyl toward Supernova Remnants: Evidence for Extended 1720 MHz Maser Emission
• Radio and X-ray images of the SNR G18.8+0.3 interacting with molecular clouds