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Revisiting the Distance, Environment, and Supernova Properties of SNR G57.2+0.8 that Hosts SGR 1935+2154
- Source :
- The Astrophysical Journal, Astrophysical Journal, 905(2):99. IOP Publishing Ltd.
- Publication Year :
- 2020
- Publisher :
- IOP Publishing Ltd., 2020.
-
Abstract
- We have performed a multi-wavelength study of supernova remnant (SNR) G57.2+0.8 and its environment. The SNR hosts the magnetar SGR 1935+2154, which emitted an extremely bright ms-duration radio burst on 2020 Apr 28 (The Chime/Frb Collaboration et al. 2020; Bochenek et al. 2020). We used the 12CO and 13CO J=1-0 data from the Milky Way Image Scroll Painting (MWISP) CO line survey to search for molecular gas associated with G57.2+0.8, in order to constrain the physical parameters (e.g., the distance) of the SNR and its magnetar. We report that SNR G57.2+0.8 is likely impacting the molecular clouds (MCs) at the local standard of rest (LSR) velocity V_{LSR} ~ 30 km/s and excites a weak 1720 MHz OH maser with a peak flux density of 47 mJy/beam. The chance coincidence of a random OH spot falling in the SNR is 1.6 \times 10^4$ (d/6.6 kpc) yr. The explosion energy of G57.2+0.8 is lower than $2 \times 10^{51}(n_0/10 cm^{-3})^{1.16} (d/~6.6 kpc)^{3.16}$ erg, which is not very energetic even assuming a high ambient density $n_0$ = 10 cm$^{-3}$. This reinforces the opinion that magnetars do not necessarily result from very energetic supernova explosions.<br />9 pages, 5 figures, accepted for publication in the Astrophysical Journal
- Subjects :
- 010504 meteorology & atmospheric sciences
Milky Way
Astrophysics::High Energy Astrophysical Phenomena
FOS: Physical sciences
Astrophysics
Astrophysics::Cosmology and Extragalactic Astrophysics
Magnetar
7. Clean energy
01 natural sciences
law.invention
law
0103 physical sciences
Maser
Supernova remnant
010303 astronomy & astrophysics
Astrophysics::Galaxy Astrophysics
0105 earth and related environmental sciences
Line (formation)
Physics
High Energy Astrophysical Phenomena (astro-ph.HE)
Molecular cloud
Local standard of rest
Astronomy and Astrophysics
Supernova
13. Climate action
Space and Planetary Science
Astrophysics - High Energy Astrophysical Phenomena
Subjects
Details
- Language :
- English
- ISSN :
- 15384357, 0004637X, 15383881, 00670049, and 00046361
- Volume :
- 905
- Issue :
- 2
- Database :
- OpenAIRE
- Journal :
- Astrophysical Journal
- Accession number :
- edsair.doi.dedup.....f8f4be14d6f7ace55f69215d9560f7df