Berkeley-Illinois-Maryland Association Survey of Protostellar Collapse Candidates in HCO^+ and HCN Lines

Details Berkeley-Illinois-Maryland Association Survey of Protostellar Collapse Candidates in HCO^+ and HCN Lines Berkeley-Illinois-Maryland Association Survey of Protostellar Collapse Candidates in HCO^+ and HCN Lines

Jun 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999apjs..122..519c&link_type=abstract

The Astrophysical Journal Supplement Series, Volume 122, Issue 2, pp. 519-556.

Astronomy and Astrophysics

Astronomy

34

Ism: Jets And Outflows, Ism: Molecules, Ism: Structure, Radio Continuum: Ism, Radio Lines: Ism, Surveys

Scientific paper

We observed protostellar collapse candidates in the lambda=3.4 mm continuum, the HCO^+ J=1-->0 line, and the HCN J=1-->0 line using the Berkeley-Illinois-Maryland Association interferometer. Regions observed are NGC 1333 IRAS 4, L1527, HH 25 MMS, IRAS 16293-2422, Serpens SMM 4/2, B335, IRAS 20050+2720, and L1157. These sources were selected from their infall signature (blue-skewed line profile) in a single-dish survey of class 0 sources (Gregersen et al.). In our HCO^+ and HCN spectra, most of the sources show the blueshifted side stronger than the redshifted side, which is consistent with the selection criteria. IRAS 16293 and IRAS 20050B line profiles are more complicated than a simple blue-skewed profile. Serpens SMM 2 shows symmetric, single-peaked line profiles. Most of the sources in our survey drive molecular outflows. We found that NGC 1333 IRAS 4A/B, L1527, B335, and L1157 are strong cases for protostellar collapse with relatively simple structures suitable for detailed study. The HCN spectrum toward IRAS 16293 shows that its infall signature from other molecular lines needs careful interpretation. HH 25 MMS, Serpens SMM 2-4, and IRAS 20050A/B are embedded in clouds with complex structure and prone to confusion.

Affiliated with

Also associated with

No associations

Rating

Berkeley-Illinois-Maryland Association Survey of Protostellar Collapse Candidates in HCO^+ and HCN Lines 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 Berkeley-Illinois-Maryland Association Survey of Protostellar Collapse Candidates in HCO^+ and HCN Lines, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Berkeley-Illinois-Maryland Association Survey of Protostellar Collapse Candidates in HCO^+ and HCN Lines will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1497916