SiO in ATLASGAL-selected massive clumps Virtual Observatory Resource

Authors
  1. Csengeri T.
  2. Leurini S.
  3. Wyrowski F.
  4. Urquhart J.S.
  5. Menten K.M.,Walmsley M.
  6. Bontemps S.
  7. Wienen M.
  8. Beuther H.
  9. Motte F.
  10. Nguyen-Luong Q.,Schilke P.
  11. Schuller F.
  12. Zavagno A.
  13. Sanna C.
  14. Published by
    CDS
Abstract

The processes leading to the birth of high-mass stars are poorly understood. The key first step to reveal their formation processes is characterising the clumps and cores from which they form. We define a representative sample of massive clumps in different evolutionary stages selected from the APEX Telescope Large Area Survey of the Galaxy (ATLASGAL), from which we aim to establish a census of molecular tracers of their evolution. As a first step, we study the shock tracer, SiO, mainly associated with shocks from jets probing accretion processes. In low-mass young stellar objects (YSOs), outflow and jet activity decreases with time during the star formation processes. Recently, a similar scenario was suggested for massive clumps based on SiO observations. Here we analyse observations of the SiO (2-1) and (5-4) lines in a statistically significant sample to constrain the change of SiO abundance and the excitation conditions as a function of evolutionary stage of massive star-forming clumps. We performed an unbiased spectral line survey covering the 3-mm atmospheric window between 84-117GHz with the IRAM 30m telescope of a sample of 430 sources of the ATLASGAL survey, covering various evolutionary stages of massive clumps. A smaller sample of 128 clumps has been observed in the SiO (5-4) transition with the APEX telescope to complement the (2-1) line and probe the excitation conditions of the emitting gas. We derived detection rates to assess the star formation activity of the sample, and we estimated the column density and abundance using both an LTE approximation and non-LTE calculations for a smaller subsample, where both transitions have been observed.

Keywords
  1. millimeter-astronomy
  2. submillimeter-astronomy
  3. molecular-clouds
  4. interstellar-medium
Bibliographic source Bibcode
2016A&A...586A.149C
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/586/A149
IVOA Identifier IVOID
ivo://CDS.VizieR/J/A+A/586/A149
Document Object Identifer DOI
doi:10.26093/cds/vizier.35860149

Access

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http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/586/A149
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http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/586/A149/table7?
IVOA Cone Search SCS
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https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/586/A149/table4?
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History

2016-02-10T08:07:21Z
Resource record created
2016-02-10T07:20:24Z
Updated
2016-02-10T08:07:21Z
Created

Contact

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CDS support team
Postal Address
CDS, Observatoire de Strasbourg, 11 rue de l'Universite, F-67000 Strasbourg, France
E-Mail
cds-question@unistra.fr