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 comprehend their physical and chemical heritage. We identified multiple
COMs utilizing the Large Program `Astrochemical Surveys At IRAM' (ASAI) data,
dedicated to chemical surveys in Sun-like star-forming regions with the IRAM 30
m telescope. It was an unbiased survey in the millimetre regime, covering the
prestellar core, protostar, outflow region, and protoplanetary disk phase.
Here, we have reported some transitions of seven COMs, namely, methanol
(CH3OH), acetaldehyde (CH3CHO), methyl formate (CH3OCHO), ethanol (C2H5OH),
propynal (HCCCHO), dimethyl ether (CH3OCH3), and methyl cyanide (CH3CN) in some
sources L1544, B1-b, IRAS4A, and SVS13A. We found a trend among these species
from the derived abundances using the rotational diagram method and MCMC fit.
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 correlate with the
luminosity of the sources. The obtained trend is also visible from the previous
interferometric observations and considering the beam dilution effect.Comment: 44 pages, 25 figures, and 12 tables. Accepted for the publication in
the Astrophysical Journa