J/A+A/686/A305 SNR G150.3+4.5 CO (J=1-0) observations (Feng+, 2024)
Large-field CO (J=1-0) observations toward SNR G150.3+4.5.
Feng J.-C., Chen X., Su Y., Sun L., Zhang S., Zhou X., Guo W.
<Astron. Astrophys. 686, A305 (2024)>
=2024A&A...686A.305F 2024A&A...686A.305F (SIMBAD/NED BibCode)
ADC_Keywords: Supernova remnants ; Radio sources ; Interstellar medium
Keywords: ISM: clouds - ISM: molecules - ISM: supernova remnants -
ISM: individual objects: SNR G150.3+4.5
Abstract:
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). We find that MCs within the velocity range of
[-14, -2]km/s 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 approximately 740 pc.
Based on the CO gas distance, the dimension and the age of the SNR are
estimated to be 40pcx33pc and 38000 years, 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.
Description:
We present large-field CO (J=1-0) molecular line observations toward
SNR G150.3+4.5, using the 13.7m millimeter telescope of the Purple
Mountain Observatory. The observations have an angular resolution of
approximately 55 arcseconds. We analyzed the spatial distribution of
MCs in relation to the SNR shell detected in previous Urumqi
λ6cm radio observations and examined the CO spectra for
kinematics information.
Objects:
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RA (2000) DE Designation(s)
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04 27 09.60 +55 27 35.9 SNR G150.3+4.5 = 4FGL J0427.2+5533e
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 33 5 Properties of the molecular clouds around the SNR
table2.dat 64 12 Spectral parameters of the shocked region
list.dat 167 14 List of fits images and spectra
fits/* . 14 Individual of fits images and spectra
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Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 14 A14 --- Cloud Cloud ID
16- 19 F4.2 10+20cm-2 NH2(12CO) H2 column density derived by 12CO
21- 24 I4 Msun MH2(12CO) H2 mass derived by 12CO
26- 29 F4.2 10+20cm-2 NH2(13CO) H2 column density derived by 13CO
31- 33 I3 Msun MH2(13CO) H2 mass derived by 13CO
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1 A1 --- Region Region
3- 7 F5.1 deg GLON Galactic longitude of spectra
8- 11 F4.1 deg GLAT Galactic latitude of spectra
13- 24 A12 --- Line CO lines
26- 30 F5.2 km/s VLSR ?=- Peak VLSR
32- 35 F4.2 km/s e_VLSR ?=- Uncertainty of VLSR
37- 40 F4.2 K Tmb ?=- Peak temperature
42- 44 F3.1 km/s FWHM ?=- FWHM
46- 64 A19 --- FileName Name of the spectrum file in subdirectory fits
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Byte-by-byte Description of file: list.dat
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Bytes Format Units Label Explanations
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1 A1 --- --- [G]
2- 10 F9.5 deg GLON Galactic longitude of center
11- 19 F9.5 deg GLAT Galactic latitude of center
21- 23 I3 --- Nx Number of pixels along X-axis
25- 27 I3 --- Ny ? Number of pixels along Y-axis for images
29- 51 A23 "datime" Obs.date Observation date
53- 64 E12.6 Hz bFREQ ? Lower value of frequency interval for spectra
66- 76 E11.6 Hz BFREQ ? Upper value of frequency interval for spectra
78- 84 F7.1 Hz dFREQ ? Frequenty resolution for spectra
86- 88 I3 Kibyte size Size of FITS file
90-108 A19 --- FileName Name of FITS file, in subdirectory fits
110-167 A58 --- Title Title of the FITS file
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Acknowledgements:
Jian-Cheng Feng, csyork(at)qq.com
References:
Bolatto et al., 2013ARA&A..51..207B 2013ARA&A..51..207B, The CO-to-H2 conversion factor
(End) Patricia Vannier [CDS] 10-Apr-2024