Sign on

SAO/NASA ADS Astronomy Abstract Service

· Find Similar Abstracts (with default settings below)
· Electronic Refereed Journal Article (HTML)
· Full Refereed Journal Article (PDF/Postscript)
· arXiv e-print (arXiv:0910.0463)
· References in the article
· Citations to the Article (1) (Citation History)
· Refereed Citations to the Article
· SIMBAD Objects (7)
· Also-Read Articles (Reads History)
·
· Translate This Page
Title:
Warm Extended Dense Gas at the Heart of a Cold Collapsing Dense Core
Authors:
Shinnaga, Hiroko; Phillips, Thomas G.; Furuya, Ray S.; Kitamura, Yoshimi
Affiliation:
AA(California Institute of Technology Submillimeter Observatory (CSO), 111 Nowelo Street, Hilo, HI 96720, USA ), AB(California Institute of Technology Submillimeter Observatory (CSO), 111 Nowelo Street, Hilo, HI 96720, USA ; Division of Physics, Mathematics, and Astronomy, California Institute of Technology 320-47, Pasadena, CA 91125, USA ; ), AC(Subaru Telescope, National Astronomical Observatory of Japan, 650 North A'ohoku Place, Hilo, HI 96720, USA ), AD(Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, 3-1-1 Yoshinodai, Sagamihara, Kanagawa 229-8510, Japan )
Publication:
The Astrophysical Journal Letters, Volume 706, Issue 2, pp. L226-L229 (2009). (ApJL Homepage)
Publication Date:
12/2009
Origin:
IOP
ApJ Keywords:
ISM: clouds, ISM: individual: L1521F MC27, stars: formation, stars: pre-main sequence, submillimeter
DOI:
10.1088/0004-637X/706/2/L226
Bibliographic Code:
2009ApJ...706L.226S

Abstract

In order to investigate when and how the birth of a protostellar core occurs, we made survey observations of four well-studied dense cores in the Taurus molecular cloud using CO transitions in submillimeter bands. We report here the detection of unexpectedly warm (~30-70 K), extended (radius of ~2400 AU), dense (a few times 105 cm–3) gas at the heart of one of the dense cores, L1521F (MC27), within the cold dynamically collapsing components. We argue that the detected warm, extended, dense gas may originate from shock regions caused by collisions between the dynamically collapsing components and outflowing/rotating components within the dense core. We propose a new stage of star formation, "warm-in-cold core stage (WICCS)," i.e., the cold collapsing envelope encases the warm extended dense gas at the center due to the formation of a protostellar core. WICCS would constitute a missing link in evolution between a cold quiescent starless core and a young protostar in class 0 stage that has a large-scale bipolar outflow.
Bibtex entry for this abstract   Preferred format for this abstract (see Preferences)
   

Find Similar Abstracts:

Use: Authors
Title
Keywords (in text query field)
Abstract Text
Return: Query Results Return    items starting with number
Query Form
Database: Astronomy
Physics
arXiv e-prints