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:0707.2979)
· References in the article
· Citations to the Article (4) (Citation History)
· Refereed Citations to the Article
· SIMBAD Objects (31)
· Also-Read Articles (Reads History)
·
· Translate This Page
Title:
High Spatial Resolution Observations of Two Young Protostars in the R Corona Australis Region
Authors:
Groppi, Christopher E.; Hunter, Todd R.; Blundell, Raymond; Sandell, Göran
Affiliation:
AA(Steward Observatory, University of Arizona, Tucson, AZ 85721; ), AB(National Radio Astronomy Observatory, Charlottesville, VA 22903), AC(Smithsonian Astrophysical Observatory, Cambridge, MA 02138), AD(SOFIA-USRA, NASA Ames Research Center, MS N211-3, Moffett Field, CA 94035)
Publication:
The Astrophysical Journal, Volume 670, Issue 1, pp. 489-498. (ApJ Homepage)
Publication Date:
11/2007
Origin:
UCP
ApJ Keywords:
ISM: Clouds, ISM: individual (R Corona Australis), ISM: Jets and Outflows, ISM: Kinematics and Dynamics, ISM: Molecules, Radio Lines: ISM, Stars: Formation
Abstract Copyright:
(c) 2007: The American Astronomical Society
DOI:
10.1086/521875
Bibliographic Code:
2007ApJ...670..489G

Abstract

We present multiwavelength, high spatial resolution imaging of the IRS 7 region in the R Corona Australis molecular cloud. Our observations include 1.1 mm continuum and HCO+ J=3-->2 images from the Submillimeter Array (SMA), 12CO J=3-->2 outflow maps from the DesertStar heterodyne array receiver on the Heinrich Hertz Telescope (HHT), 450 and 850 μm continuum images from SCUBA, and archival Spitzer IRAC and MIPS 24 μm images. The accurate astrometry of the IRAC images allow us to identify IRS 7 with the centimeter source VLA 10W (IRS 7A) and the X-ray source XW. The SMA 1.1 mm image reveals two compact continuum sources that are also distinguishable at 450 μm. SMA 1 coincides with X-ray source CXOU J190156.4-365728 and VLA centimeter source 10E (IRS 7B) and is seen in the IRAC and MIPS images. SMA 2 has no infrared counterpart but coincides with centimeter source VLA 9. Spectral energy distributions constructed from SMA, SCUBA, and Spitzer data yield bolometric temperatures of 83 K for SMA 1 and <=70 K for SMA 2. These temperatures along with the submillimeter to total luminosity ratios indicate that SMA 2 is a Class 0 protostar, while SMA 1 is a Class 0/Class I transitional object (L=17+/-6 Lsolar). The 12CO J=3-->2 outflow map shows one major and possibly several smaller outflows centered on the IRS 7 region, with masses and energetics consistent with previous work. We identify the Class 0 source SMA 2/VLA 9 as the main driver of this outflow. The complex and clumpy spatial and velocity distribution of the HCO+ J=3-->2 emission is not consistent with either bulk rotation, or any known molecular outflow activity.
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
    


SAO/NASA ADS Homepage | ADS Sitemap | Query Form | Basic Search | Preferences | HELP | FAQ