| Issue |
A&A
Volume 686, June 2024
|
|
|---|---|---|
| Article Number | A305 | |
| Number of page(s) | 15 | |
| Section | Interstellar and circumstellar matter | |
| DOI | https://doi.org/10.1051/0004-6361/202449353 | |
| Published online | 21 June 2024 | |
Large-field CO (J = 1−0) observations toward SNR G150.3+4.5★
1
Purple Mountain Observatory and Key Laboratory of Radio Astronomy, Chinese Academy of Sciences,
Nanjing
210034,
PR China
e-mail: fengjc@pmo.ac.cn; xpchen@pmo.ac.cn
2
School of Astronomy and Space Science, University of Science and Technology of China,
96 Jinzhai Road,
Hefei
230026,
PR China
3
Institute for Theoretical Physics and Cosmology, Zhejiang University of Technology,
Hangzhou
310023,
PR China
Received:
26
January
2024
Accepted:
27
March
2024
Aims. We aim to investigate the molecular environment of the supernova remnant (SNR) G150.3+4.5, and explore its association with ambient molecular clouds (MCs).
Methods. We present large-field CO (J = 1−0) molecular line observations toward SNR G150.3+4.5, using the 13.7 m millimeter telescope of the Purple Mountain Observatory. The observations have an angular resolution of ~55″. We analyzed the spatial distribution of MCs in relation to the SNR shell detected in previous Urumqi λ 6 cm radio observations and examined the CO spectra for kinematics information.
Results. We find that MCs within the velocity range of [−14, −2] km s−1 are spatially distributed along the radio shell of the SNR. Line broadening and asymmetries are observed in the CO spectra of the clouds. Moreover, we find that the molecular clouds around the shell have systematic velocity gradients in the position–velocity (PV) diagram. Both the morphology alignment and gas kinematics suggest that the SNR is associated with the ambient MCs at ~740 pc. Based on the CO gas distance, the dimension and the age of the SNR are estimated to be 40 pc × 33 pc and 3.8 × 104 yr, respectively. The very high energy emission of 1LHAASO J0428+5531 toward the SNR may originate from the interaction between the SNR and the surrounding MCs.
Key words: ISM: clouds / ISM: molecules / ISM: supernova remnants / ISM: individual objects: SNR G150.3+4.5
The reduced datacube is available at the CDS via anonymous ftp to cdsarc.cds.unistra.fr (130.79.128.5) or via https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/686/A305
© The Authors 2024
Open Access article, published by EDP Sciences, under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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