Physics
Scientific paper
Aug 2003
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003chphl..20.1409w&link_type=abstract
Chinese Physics Letters, Volume 20, Issue 8, pp. 1409-1412 (2003).
Physics
4
Scientific paper
We have observed 22 sources in 13CO and C18O J = 1-0 lines with a 13.7-m telescope at Qinghai station of PMO, NAOC. The samples were chosen with new criteria so that the sources are much redder and fainter than those chosen before. All the 22 sources were detected with the pair lines of 13CO and C18O and are suitable for analysing star formation except one multiple emission source IRAS 20300+3909. Physical parameters were derived from the local thermodynamic equilibrium assumption. The excitation temperature and column density of C18O are 13 K and 1.5×1015 cm-2, respectively, on the average. 11 sources in the samples have line widths larger than 3 km/s. The IRAS colour indices are larger than those of class-0 objects. The intermediate and far infrared energy distributions show that the emission peaks of the samples fall in far infrared or longer wavelengths except IRAS 20149+3955, indicating that they may be very young stellar objects. Analyses of line widths and bolometric luminosity show that seven of those sources may be extremely young high or intermediate mass stellar objects.
Wang Jun-Zhi
Wu Jing-Wen
Wu Yue-Fang
No associations
LandOfFree
A Search for Extremely Young Stellar Objects 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 A Search for Extremely Young Stellar Objects, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A Search for Extremely Young Stellar Objects will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1667493