2014
DOI: 10.1051/0004-6361/201219692
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A CO observation of the Galactic methanol masers

Abstract: Context. We investigated the molecular gas associated with 6.7 GHz methanol masers throughout the Galaxy using a J = 1−0 transition of the CO isotopologues. Aims. The methanol maser at 6.7 GHz is an ideal tracer for young high-mass star-forming cores. Based on molecular line emissions in the maser sources throughout the Galaxy, we can estimate their physical parameters and, thereby, investigate the forming conditions of the high-mass stars. Methods. Using the 13.7-m telescope at the Purple Mountain Observatory… Show more

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Cited by 2 publications
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“…With an assumption of a beam-filling factor of 1, the excitation temperature of each clump can be straightforwardly obtained and is presented in column 5 of Table 2. The resulting excitation temperatures range from 16 K to 30 K, consistent with that in intermediate-to high-mass star-forming regions (Molinari et al 1996;Sridharan et al 2002;Wu et al 2006;Liu et al 2011;Ren et al 2014).…”
Section: Clumpssupporting
confidence: 72%
“…With an assumption of a beam-filling factor of 1, the excitation temperature of each clump can be straightforwardly obtained and is presented in column 5 of Table 2. The resulting excitation temperatures range from 16 K to 30 K, consistent with that in intermediate-to high-mass star-forming regions (Molinari et al 1996;Sridharan et al 2002;Wu et al 2006;Liu et al 2011;Ren et al 2014).…”
Section: Clumpssupporting
confidence: 72%