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SMA molecular line survey towards the massive star-forming region G10.6-0.4 in W31 complex
Wong WaiHo1; An Tao1
2018
Source PublicationRESEARCH IN ASTRONOMY AND ASTROPHYSICS
ISSN1674-4527
Volume18Issue:11
AbstractLine surveys of complex molecules with millimeter and sub-millimeter telescopes are important for probing the physical and chemical environments of massive star forming regions (MSFRs). We present a molecular line survey with the Submillimeter Array (SMA) in the frequency ranges of 220.3-222.3 GHz and 230.3-232.3 GHz toward G10.6-0.4, the brightest star forming core in the W31 complex. Ninety-nine transitions from 22 molecular species and their isotopologues are identified. The moment 0 images of typical molecules show a compact core which is concentrated at the continuum peak position. Based on the local thermodynamic equilibrium assumption, the molecular line data are modeled. The rotational temperatures of those molecular species range from 96 to 178 K and their column densities range from 2.0 x 10(14) to 3.7 x 10(17) cm(-2). The observational data suggest that all complex molecules are located in a warm environment. Chemical environments of the molecules are discussed. We compared molecular abundances and gas temperatures in G10.6-0.4 with those in other MSFRs, and found that gas temperatures and fractional abundances of specific molecules in G10.6-0.4 are similar to the typical MSFR W51 North, suggesting that there are similar physical and chemical environments in these two MSFRs.
KeywordGRAIN-SURFACE-CHEMISTRY TEMPERATURE PROBE ACCRETION FLOW OH MASERS HOT-CORE ABUNDANCES CLOUDS SUBMILLIMETER DUST GAS stars: formation ISM: abundances ISM: individual objects: G10.6-0.4 ISM: molecules radio lines: ISM
Language英语
Funding Project[Youth Innovation Promotion Association of CAS] ; [Smithsonian Institution] ; [Academia Sinica]
Document Type期刊论文
Identifierhttp://ir.bao.ac.cn/handle/114a11/72859
Collection中国科学院国家天文台
Affiliation1.中国科学院国家天文台
2.中国科学院大学
First Author AffilicationNational Astronomical Observatories, Chinese Academy of Sciences
Recommended Citation
GB/T 7714
Wong WaiHo,An Tao. SMA molecular line survey towards the massive star-forming region G10.6-0.4 in W31 complex[J]. RESEARCH IN ASTRONOMY AND ASTROPHYSICS,2018,18(11).
APA Wong WaiHo,&An Tao.(2018).SMA molecular line survey towards the massive star-forming region G10.6-0.4 in W31 complex.RESEARCH IN ASTRONOMY AND ASTROPHYSICS,18(11).
MLA Wong WaiHo,et al."SMA molecular line survey towards the massive star-forming region G10.6-0.4 in W31 complex".RESEARCH IN ASTRONOMY AND ASTROPHYSICS 18.11(2018).
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