Interstellar absorption lines toward NGC 2264 and AFGL 2591 - Abundances of H2, H3(+), and CO

Details Interstellar absorption lines toward NGC 2264 and AFGL 2591 - Abundances of H2, H3(+), and CO Interstellar absorption lines toward NGC 2264 and AFGL 2591 - Abundances of H2, H3(+), and CO

Aug 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...358..459b&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 358, Aug. 1, 1990, p. 459-467. Research supported by NSF.

Astronomy and Astrophysics

Astrophysics

47

Absorption Spectra, Abundance, Galactic Cosmic Rays, Interstellar Gas, Line Spectra, Carbon Monoxide, Hydrogen, Infrared Spectra, Infrared Spectrophotometers, Interstellar Matter, Stellar Spectrophotometry

Scientific paper

Interstellar absorption-line spectroscopy of NGC 2264 is reported which shows that the CO molecule has a column density of 5 x 10 to the 18th/sq cm and a rotational excitation temperature of 28 K. A direct upper limit on the H2 column density implies that at least 6 percent of a solar carbon abundance is in the form of CO. The upper limit on the H3(+) abundance implies that the cosmic-ray ionization rate is of the order of 10 to the -16th/s or less. The H3(+) upper limit, together with a previous radio detection of H2D(+) emission, implies either an enormous overabundance of the deuterated molecule or else that most of the radio emission comes from clouds not located directly between use and the infrared source. Observations of the sources AFGL 2591 and NGC 2024 IRS2 indicate that upper limits on H3(+) imply cosmic ray ionization rates of less than 3 and 60 x 10 to the -17th/s, respectively.

Affiliated with

Also associated with

No associations

Rating

Interstellar absorption lines toward NGC 2264 and AFGL 2591 - Abundances of H2, H3(+), and CO 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 Interstellar absorption lines toward NGC 2264 and AFGL 2591 - Abundances of H2, H3(+), and CO, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Interstellar absorption lines toward NGC 2264 and AFGL 2591 - Abundances of H2, H3(+), and CO will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1124979