Detection of HCOOCH3 toward a Low-Mass Protostar, NGC 1333 IRAS 4B

Details Detection of HCOOCH3 toward a Low-Mass Protostar, NGC 1333 IRAS 4B Detection of HCOOCH3 toward a Low-Mass Protostar, NGC 1333 IRAS 4B

Feb 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006pasj...58l..15s&link_type=abstract

Publications of the Astronomical Society of Japan, Vol.58, No.1, pp. L15-L18

Astronomy and Astrophysics

Astronomy

20

Ism: Abundances, Ism: Individual (Ngc 1333 Iras 4B), Ism: Molecules, Stars:Formation

Scientific paper

The rotational spectral lines of methylformate (HCOOCH3) have been detected toward a low-mass protostar, NGC 1333 IRAS 4B, with the Nobeyama 45m radio telescope. The column density is derived to be (7 - 37) × 1015 cm-2, assuming a source size of 1'' and the range of the excitation temperature to be from 50K to 200K. The column density is almost comparable to those found in other low-mass star-forming regions, NGC 1333 IRAS 4A and IRAS 16293-2422. The line width of HCOOCH3 is (1.0 - 1.2) km s-1, which is narrower than that of the high-excitation line of CH3OH (8-4-9-3). Since NGC 1333 IRAS 4B is likely to be a very young protostar, HCOOCH3 appears even in the early stage of protostellar evolution. The spectral lines of HCOOCH3 could be used as a novel tracer for detecting an onset of star formation.

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