Chemical Evolution of Some Selected Complex Organic Molecules in Low-mass Star-forming Regions
Journal article, 2023

The destiny of complex organic molecules (COMs) in star-forming regions is interlinked with various evolutionary phases. Therefore, identifying these species in diversified environments of identical star-forming regions would help to understand their physical and chemical heritage. We identified multiple COMs utilizing the Large Program Astrochemical Surveys At Institut de Radio Astronomie Millimétrique (IRAM) data, dedicated to chemical surveys in Sun-like star-forming regions with the IRAM 30 m telescope. It was an unbiased survey in the millimeter regime, covering the prestellar core, protostar, outflow region, and protoplanetary disk phase. Here, we report the transitions of seven COMs, namely, methanol (CH3OH), acetaldehyde (CH3CHO), methyl formate (CH3OCHO), ethanol (C2H5OH), propynal (HCCCHO), dimethyl ether (CH3OCH3), and methyl cyanide (CH3CN) in sources L1544, B1-b, IRAS4A, and SVS13A. We found a trend among these species from the derived abundances using the rotational diagram method and Monte Carlo Markov chain fitting. We have found that the abundances of all of the COMs, except for HCCCHO, increase from the L1544 (prestellar core) and peaks at IRAS16293-2422 (class 0 phase). It is noticed that the abundance of these molecules correlates with the luminosity of the sources. The obtained trend is also visible from the previous interferometric observations and considering the beam dilution effect.

Author

Bratati Bhat

AE/C

Rumela Kar

Indian Institute of Technology

Suman Kumar Mondal

S.N. Bose National Centre for Basic Sciences (SNBNCBS)

Rana Ghosh

Indian Centre for Space Physics

Prasanta Gorai

Chalmers, Space, Earth and Environment, Astronomy and Plasmaphysics

Takashi Shimonishi

Niigata University

Kei E.I. Tanaka

Tokyo Institute of Technology

Kenji Furuya

University of Tsukuba

National Astronomical Observatory of Japan

Ankan Das

AE/C

Astrophysical Journal

0004-637X (ISSN) 1538-4357 (eISSN)

Vol. 958 2 111

Subject Categories

Astronomy, Astrophysics and Cosmology

Atom and Molecular Physics and Optics

DOI

10.3847/1538-4357/acfc4d

More information

Latest update

5/30/2024