Astronomy and Astrophysics – Astronomy
Scientific paper
May 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999aas...194.7107r&link_type=abstract
American Astronomical Society, 194th AAS Meeting, #71.07; Bulletin of the American Astronomical Society, Vol. 31, p.943
Astronomy and Astrophysics
Astronomy
Scientific paper
W51 is a large star forming region located in the Sagittarius arm about 7 kpc away from the Sun. Since the 1960s it has been a prime target for radio astronomy observations because of the large emission measure and the abundance of molecular absorption lines. We continue this effort by observing W51 at millimeter wavelengths with the BIMA array looking for methyl cyanide (CH_3CN) emission. Many large molecules have been observed in the region around W51 These large molecular species are found to exist mainly in two compact hot core regions, W51 e1/e2 and W51 IRS 2. Only very recently have attempts been made to observe methyl cyanide in this region. The motivation to observe methyl cyanide is due to the fact that it is an abundant symmetric top molecule which is a good temperature tracer. From observations of the emission lines, we can get an indication of the excitation temperature of the gas in the region. Derived temperature and column density will put constraints on the physical and chemical models for the hot cores. What we have found is that our observations agree very well with the observations of Zhang, Q. et al. (1998, ApJ, 494, 636) that the cores of each region have a temperature of greater than 100K and a number density greater than 100 cm(-3) .
Liu Shen-Ye
Pei Chang-xing
Remijan Anthony J.
Snyder Lewis E.
No associations
LandOfFree
Methyl Cyanide (CH_3CN) Observations of W51 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 Methyl Cyanide (CH_3CN) Observations of W51, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Methyl Cyanide (CH_3CN) Observations of W51 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1121192