H2CO and CO observations of TMC1

Details H2CO and CO observations of TMC1 H2CO and CO observations of TMC1

Jun 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981a%26a....99..270h&link_type=abstract

Astronomy and Astrophysics, vol. 99, no. 2, June 1981, p. 270-273. Research supported by the Aerospace Corporate Programs for R

Astronomy and Astrophysics

Astrophysics

11

Carbon Monoxide, Formaldehyde, Interstellar Gas, Molecular Clouds, Molecular Spectra, Spectrum Analysis, Absorption Spectra, Cosmic Dust, Cyanoacetylene, Line Spectra

Scientific paper

Observations of the J equals 1-0 lines of CO, (C-13)O and the 1(10)-1(11) and 2(11)-2(12) lines of H2CO toward the molecular center Taurus Molecular Cloud 1 (TMC 1) are presented. TMC 1 is remarkable for the strong emission from HC3N, HC5N and HC7N. The kinetic temperature obtained from CO observations is (11 + or - 1) K, and the optical depth of the (C-13)O line is not less than 1. Much of the radiation from CO and (C-13)O must be formed in the diffuse gas in the Heiles Cloud 2 which surrounds TMC 1. There are two distinct velocity components in the 1(10)-1(11) absorption line of H2CO, while this is not the case for the 2(11)-2(12) line. These lines are therefore not formed in the same volume of space and the H2 density cannot be determined following the procedure of Henkel et al. (1980). Only rough density limits are available: the H2 density of TMC 1 is probably greater than 10,000 per cu cm but certainly less than 1,000,000 per cu cm. Such densities are not unusual, and the large abundance of HC5N in TMC 1 is caused by other factors, one of which may be the age of the cloud.

Affiliated with

Also associated with

No associations

Rating

H2CO and CO observations of TMC1 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with H2CO and CO observations of TMC1, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and H2CO and CO observations of TMC1 will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-990823