Millimeter and submillimeter survey of the R coronae australis region

Christopher E. Groppi, Craig Kulesa, Christopher K Walker, Christopher L. Martin

Research output: Contribution to journalArticle

14 Citations (Scopus)

Abstract

Using a combination of data from the Antarctic Submillimeter Telescope and Remote Observatory (AST/RO), the Arizona Radio Observatory Kitt Peak 12 m telescope, and the Arizona Radio Observatory 10 m Heinrich Hertz Telescope, we have studied the most active part of the R CrA molecular cloud in multiple transitions of carbon monoxide, HCO+, and 870 μm continuum emission. Since R CrA is nearby (130 pc), we are able to obtain physical spatial resolution as high as 0.01 pc over an area of 0.16 pc2, with velocity resolution finer than 1 km s-1. Mass estimates of the protostar driving the millimeter-wave emission derived from HCO+, dust continuum emission, and kinematic techniques point to a young, deeply embedded protostar of ∼0.5-0.75 M, with a gaseous envelope of similar mass. A molecular outflow is driven by this source that also contains at least 0.8 M of molecular gas with ∼0.5 L of mechanical luminosity. HCO+ lines show the kinematic signature of infall motions, as well as bulk rotation. The source is most likely a Class 0 protostellar object not yet visible at near-IR wavelengths. With the combination of spatial and spectral resolution in our data set, we are able to disentangle the effects of infall, rotation, and outflow toward this young object.

Original languageEnglish (US)
Pages (from-to)946-955
Number of pages10
JournalAstrophysical Journal
Volume612
Issue number2 I
DOIs
StatePublished - Sep 10 2004

Fingerprint

coronas
corona
observatories
observatory
protostars
telescopes
spatial resolution
outflow
kinematics
radio
continuums
molecular gases
spectral resolution
molecular clouds
carbon monoxide
millimeter waves
envelopes
dust
luminosity
signatures

Keywords

  • ISM: clouds
  • ISM: individual (Corona Australis Cloud)
  • ISM: jets and outflows
  • ISM: kinematics and dynamics
  • ISM: molecules
  • Stars: formation

ASJC Scopus subject areas

  • Space and Planetary Science

Cite this

Millimeter and submillimeter survey of the R coronae australis region. / Groppi, Christopher E.; Kulesa, Craig; Walker, Christopher K; Martin, Christopher L.

In: Astrophysical Journal, Vol. 612, No. 2 I, 10.09.2004, p. 946-955.

Research output: Contribution to journalArticle

Groppi, Christopher E. ; Kulesa, Craig ; Walker, Christopher K ; Martin, Christopher L. / Millimeter and submillimeter survey of the R coronae australis region. In: Astrophysical Journal. 2004 ; Vol. 612, No. 2 I. pp. 946-955.
@article{ab403318e8504cea9e85c7fbb7a45590,
title = "Millimeter and submillimeter survey of the R coronae australis region",
abstract = "Using a combination of data from the Antarctic Submillimeter Telescope and Remote Observatory (AST/RO), the Arizona Radio Observatory Kitt Peak 12 m telescope, and the Arizona Radio Observatory 10 m Heinrich Hertz Telescope, we have studied the most active part of the R CrA molecular cloud in multiple transitions of carbon monoxide, HCO+, and 870 μm continuum emission. Since R CrA is nearby (130 pc), we are able to obtain physical spatial resolution as high as 0.01 pc over an area of 0.16 pc2, with velocity resolution finer than 1 km s-1. Mass estimates of the protostar driving the millimeter-wave emission derived from HCO+, dust continuum emission, and kinematic techniques point to a young, deeply embedded protostar of ∼0.5-0.75 M⊙, with a gaseous envelope of similar mass. A molecular outflow is driven by this source that also contains at least 0.8 M⊙ of molecular gas with ∼0.5 L ⊙ of mechanical luminosity. HCO+ lines show the kinematic signature of infall motions, as well as bulk rotation. The source is most likely a Class 0 protostellar object not yet visible at near-IR wavelengths. With the combination of spatial and spectral resolution in our data set, we are able to disentangle the effects of infall, rotation, and outflow toward this young object.",
keywords = "ISM: clouds, ISM: individual (Corona Australis Cloud), ISM: jets and outflows, ISM: kinematics and dynamics, ISM: molecules, Stars: formation",
author = "Groppi, {Christopher E.} and Craig Kulesa and Walker, {Christopher K} and Martin, {Christopher L.}",
year = "2004",
month = "9",
day = "10",
doi = "10.1086/422168",
language = "English (US)",
volume = "612",
pages = "946--955",
journal = "Astrophysical Journal",
issn = "0004-637X",
publisher = "IOP Publishing Ltd.",
number = "2 I",

}

TY - JOUR

T1 - Millimeter and submillimeter survey of the R coronae australis region

AU - Groppi, Christopher E.

AU - Kulesa, Craig

AU - Walker, Christopher K

AU - Martin, Christopher L.

PY - 2004/9/10

Y1 - 2004/9/10

N2 - Using a combination of data from the Antarctic Submillimeter Telescope and Remote Observatory (AST/RO), the Arizona Radio Observatory Kitt Peak 12 m telescope, and the Arizona Radio Observatory 10 m Heinrich Hertz Telescope, we have studied the most active part of the R CrA molecular cloud in multiple transitions of carbon monoxide, HCO+, and 870 μm continuum emission. Since R CrA is nearby (130 pc), we are able to obtain physical spatial resolution as high as 0.01 pc over an area of 0.16 pc2, with velocity resolution finer than 1 km s-1. Mass estimates of the protostar driving the millimeter-wave emission derived from HCO+, dust continuum emission, and kinematic techniques point to a young, deeply embedded protostar of ∼0.5-0.75 M⊙, with a gaseous envelope of similar mass. A molecular outflow is driven by this source that also contains at least 0.8 M⊙ of molecular gas with ∼0.5 L ⊙ of mechanical luminosity. HCO+ lines show the kinematic signature of infall motions, as well as bulk rotation. The source is most likely a Class 0 protostellar object not yet visible at near-IR wavelengths. With the combination of spatial and spectral resolution in our data set, we are able to disentangle the effects of infall, rotation, and outflow toward this young object.

AB - Using a combination of data from the Antarctic Submillimeter Telescope and Remote Observatory (AST/RO), the Arizona Radio Observatory Kitt Peak 12 m telescope, and the Arizona Radio Observatory 10 m Heinrich Hertz Telescope, we have studied the most active part of the R CrA molecular cloud in multiple transitions of carbon monoxide, HCO+, and 870 μm continuum emission. Since R CrA is nearby (130 pc), we are able to obtain physical spatial resolution as high as 0.01 pc over an area of 0.16 pc2, with velocity resolution finer than 1 km s-1. Mass estimates of the protostar driving the millimeter-wave emission derived from HCO+, dust continuum emission, and kinematic techniques point to a young, deeply embedded protostar of ∼0.5-0.75 M⊙, with a gaseous envelope of similar mass. A molecular outflow is driven by this source that also contains at least 0.8 M⊙ of molecular gas with ∼0.5 L ⊙ of mechanical luminosity. HCO+ lines show the kinematic signature of infall motions, as well as bulk rotation. The source is most likely a Class 0 protostellar object not yet visible at near-IR wavelengths. With the combination of spatial and spectral resolution in our data set, we are able to disentangle the effects of infall, rotation, and outflow toward this young object.

KW - ISM: clouds

KW - ISM: individual (Corona Australis Cloud)

KW - ISM: jets and outflows

KW - ISM: kinematics and dynamics

KW - ISM: molecules

KW - Stars: formation

UR - http://www.scopus.com/inward/record.url?scp=7544226809&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=7544226809&partnerID=8YFLogxK

U2 - 10.1086/422168

DO - 10.1086/422168

M3 - Article

VL - 612

SP - 946

EP - 955

JO - Astrophysical Journal

JF - Astrophysical Journal

SN - 0004-637X

IS - 2 I

ER -