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Radiative transfer ...
Radiative transfer modeling of the observed line profiles in G31.41+0.31
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- Bhat, Bratati (författare)
- Indian Centre for Space Physics
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- Gorai, Prasanta, 1991 (författare)
- Indian Centre for Space Physics,Chalmers tekniska högskola,Chalmers University of Technology
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- Mondal, Suman Kumar (författare)
- Indian Centre for Space Physics
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- Chakrabarti, Sandip K. (författare)
- Indian Centre for Space Physics
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- Das, Ankan (författare)
- Indian Centre for Space Physics
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(creator_code:org_t)
- Elsevier BV, 2022
- 2022
- Engelska.
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Ingår i: Advances in Space Research. - : Elsevier BV. - 1879-1948 .- 0273-1177. ; 69:1, s. 415-437
- Relaterad länk:
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http://arxiv.org/pdf...
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https://research.cha...
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https://doi.org/10.1...
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Abstract
Ämnesord
Stäng
- An inverse P-Cygni profile of H13CO+ (1 → 0) in G31.41+0.31 was recently observed, which indicates the presence of an infalling gas envelope. Also, an outflow tracer, SiO, was observed. Here, exclusive radiative transfer modelings have been implemented to generate synthetic spectra of some key species (H13CO+, HCN, SiO, NH3, CH3CN, CH3OH, CH3SH, and CH3NCO) and extract the physical features to infer the excitation conditions of the surroundings where they observed. The gas envelope is assumed to be accreting in a spherically symmetric system towards the central hot core region. Our principal intention was to reproduce the observed line profiles toward G31.41+0.31 and extract various physical parameters. The LTE calculation with CASSIS and non-LTE analysis with the RATRAN radiative transfer codes are considered for the modeling purpose. The best-fitted line parameters are derived, which represents the prevailing physical condition of the gas envelope. Our results suggest that an infalling gas could explain the observed line profiles of all the species mentioned above except SiO. An additional outflow component is required to confer the SiO line profile. Additionally, an astrochemical model is implemented to explain the observed abundances of various species in this source.
Ämnesord
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Meteorologi och atmosfärforskning (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Meteorology and Atmospheric Sciences (hsv//eng)
- NATURVETENSKAP -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
- NATURAL SCIENCES -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)
- NATURVETENSKAP -- Geovetenskap och miljövetenskap -- Geofysik (hsv//swe)
- NATURAL SCIENCES -- Earth and Related Environmental Sciences -- Geophysics (hsv//eng)
Nyckelord
- Astrochemistry
- Kinematics and dynamics
- ISM
- Individual(G31.41+0.31)
- Line profiles
Publikations- och innehållstyp
- art (ämneskategori)
- ref (ämneskategori)
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