Astronomy and Astrophysics – Astrophysics
Scientific paper
Nov 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...363..528r&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 363, Nov. 10, 1990, p. 528-546. Research supported by the University of Mar
Astronomy and Astrophysics
Astrophysics
53
Gravitational Collapse, Nebulae, Star Formation, Absorption Spectra, Abundance, Astronomical Models, Astronomical Spectroscopy, Emission Spectra, H Ii Regions
Scientific paper
High-resolution molecular line and 3.4 mm continuum observations of a 2.3 arcmin field centered on W51 IRS 1 in the W51 molecular core are presented. The HCO(+) spectra show deep, wide absorptions redshifted in the cases of W51e2 and W51 IRS 2, both redshifted and blueshifted in the case of W51 IRA 1. The latter two absorptions can be explained by postulating that the W51 cloud is undergoing a large-scale dynamic collapse toward materials centered near W51e2. The HCO(+) maps reveal the presence of many clumps of emission with lower mass limits ranging from 20-50 solar and upper limits of 90 solar, suggesting that many of these clumps are gravitationally bound. H(C-13)N and SO maps reveal three molecular peaks which coincide with the NH3(3,3) peaks seen by Ho et al. (1983) and are therefore warm. A previously undetected molecular peak, H(C-13)N-4, coincides with a 3.4 mm continuum peak due to thermal dust.
Dubrulle Berengere
Palmer Patrick
Rudolph Alexander
Welch William J.
No associations
LandOfFree
Dynamical collapse of the W51 star-forming region 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 Dynamical collapse of the W51 star-forming region, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Dynamical collapse of the W51 star-forming region will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-839758