Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004apj...613l..45h&link_type=abstract
The Astrophysical Journal, Volume 613, Issue 1, pp. L45-L48.
Astronomy and Astrophysics
Astronomy
32
Ism: Abundances, Ism: Clouds, Ism: Individual: Name: Sagittarius B2(N-Lmh), Ism: Molecules, Radio Lines: Ism
Scientific paper
Interstellar glycolaldehyde (CH2OHCHO) has been detected with the 100 m Green Bank Telescope (GBT) toward the star-forming region Sagittarius B2(N) by means of the 110-101, 211-202, 312-303, and 413-404 rotational transitions at 13.48, 15.18, 17.98, and 22.14 GHz, respectively. An analysis of these four high signal-to-noise ratio rotational transitions yields a glycolaldehyde state temperature of ~8 K. Previously reported emission-line detections of glycolaldehyde with the NRAO 12 m telescope at millimeter wavelengths (71-103 GHz) are characterized by a state temperature of ~50 K. By comparison, the GBT detections are surprisingly strong and are seen in emission at 13.48 GHz, emission and absorption at 15.18 GHz, and absorption at 17.98 and 22.14 GHz. We attribute the strong absorption observed by the GBT at the higher frequencies to the correspondingly smaller GBT beams coupling better to the continuum source(s) in Sagittarius B2(N). A possible model for the two-temperature regions of glycolaldehyde is discussed.
Hollis Jan. M.
Jewell Phil R.
Lovas Francis J.
Remijan Anthony
No associations
LandOfFree
Green Bank Telescope Observations of Interstellar Glycolaldehyde: Low-Temperature Sugar 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 Green Bank Telescope Observations of Interstellar Glycolaldehyde: Low-Temperature Sugar, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Green Bank Telescope Observations of Interstellar Glycolaldehyde: Low-Temperature Sugar will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1061569