Millimeter-wave molecular emission and absorption profiles toward Casiopesia A

Details Millimeter-wave molecular emission and absorption profiles toward Casiopesia A Millimeter-wave molecular emission and absorption profiles toward Casiopesia A

Feb 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995a%26a...294..811l&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 294, no. 3, p. 811-814

Astronomy and Astrophysics

Astrophysics

7

Absorption Spectra, Abundance, Emission Spectra, Interstellar Matter, Millimeter Waves, Supernova Remnants, Molecular Gases, Optical Thickness, Radiative Heat Transfer

Scientific paper

Radiofrequency absorption lines from many molecules have been observed against Cas A since the discovery of OH, even using small single dish telescopes at mm wavelengths where the continuum antenna temperature is well below 1 K. We show here that the apparent optical depth seen in mm-wave measurements is not the true optical depth, if for no other reason than that the line emission is not negligible at the temperatures and densities inferred for the neutral gas (10 - 20 K, 1000 - 4000 H2/cu cm). We have detected the J = 2 - 1 line of CS in the Perseus Arm gas at -40 km/s toward Cas A for the first time, but weakly in emission (Tr* = 0.02 K). This gas may arise behind the remnant.

Affiliated with

Also associated with

No associations

Rating

Millimeter-wave molecular emission and absorption profiles toward Casiopesia A 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 Millimeter-wave molecular emission and absorption profiles toward Casiopesia A, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Millimeter-wave molecular emission and absorption profiles toward Casiopesia A will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1629231