Abstract
We present a study of the molecular cloud in Sh2-112 massive star forming region using the 3-2 transition of CO isotopologues: CO, \(^{13}\)CO and C\(^{18}\)O; supplemented in part by CGPS H i line emission and MSX data. Sh2-112 is an optically visible region powered by an O8V type massive star BD\(+\)45 3216, and hosts two Red MSX Survey sources: G083.7962\(+\)03.3058 and G083.7071\(+\)03.2817, classified as H ii region and young stellar object, respectively. Reduced spectral data products from the James Clerk Maxwell Telescope archive, centered on the two RMS objects with \(\sim \) \(7'\times 7'\) field-of-view each, were utilized for the purpose. The \(^{13}\)CO(3-2) channel map of the region shows the molecular cloud to have filamentary extensions directed away from the massive star, which also seems to be at the edge of a cavity like structure. Multiple molecular cloud protrusions into this cavity structure, host local peaks of emission. The integrated emission map of the region constructed from only those emission clumps, detected above 5\(\sigma \) level in the position–position–velocity space affirms the same. MSX sources were found distributed along the cavity boundary, where the gas has been compressed. Spectral extraction at these positions yielded high Mach numbers and low ratios of thermal to non-thermal pressures, suggesting a dominance of supersonic and non-thermal motion in the cloud.
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Acknowledgements
We thank the anonymous referee for a critical reading of the manuscript and for the suggestions in the improvement of this paper. DKO acknowledges the support of the Department of Atomic Energy, Government of India, under project Identification No. RTI 4002. The James Clerk Maxwell Telescope has historically been operated by the Joint Astronomy Centre on behalf of the Science and Technology Facilities Council of the United Kingdom, the National Research Council of Canada and the Netherlands Organization for Scientific Research. This research has made use of the NASA/IPAC Infrared Science Archive, which is funded by the National Aeronautics and Space Administration and operated by the California Institute of Technology. This research made use of data products from the Midcourse Space Experiment. Processing of the data was funded by the Ballistic Missile Defense Organization with additional support from NASA Office of Space Science. This research has also made use of the NASA/IPAC Infrared Science Archive, which is operated by the Jet Propulsion Laboratory, California Institute of Technology, under contract with the National Aeronautics and Space Administration. This research has made use of the services of the ESO Science Archive Facility.
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This article is part of the Special Issue on “Star formation studies in the context of NIR instruments on 3.6m DOT”.
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Mallick, K.K., Sharma, S., Dewangan, L.K. et al. Investigating morphology and CO gas kinematics of Sh2-112 region. J Astrophys Astron 44, 34 (2023). https://doi.org/10.1007/s12036-023-09930-2
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DOI: https://doi.org/10.1007/s12036-023-09930-2