CH_3_OH and H_2_O Galactic center masers Virtual Observatory Resource

Authors
  1. Chambers E.T.
  2. Yusef-Zadeh F.
  3. Ott J.
  4. Published by
    CDS
Abstract

We present a study of star formation in the central molecular zone (CMZ) of our Galaxy through the association of three star formation indicators: 6.7GHz CH_3_OH masers, 22GHz H_2_O masers, and enhanced 4.5{mu}m emission ('green') sources. We explore how star formation in the CMZ (|l|<1.3{deg}, |b|<10') compares with that of the Galactic disk (6{deg}>l>345{deg}, |b|<2{deg}). Using an automated algorithm, we search for green sources toward 6.7GHz CH_3_OH masers detected in the Parkes Methanol Multibeam Survey. We combine these results with lists of 22GHz H_2_O masers, including our Mopra survey of the CMZ. We find that the correlation of CH_3_OH masers with green sources is a function of Galactic latitude, with a minimum close to b=0 and increasing with |b| (toward the central part of the Galaxy, 6{deg}>l>345{deg}, |b|<2{deg}). We find no significant difference between the correlation rate of CH_3_OH masers with green sources in the CMZ and the disk. This suggests that although the physical conditions of the gas are different in the CMZ from that of the Galactic disk, once gravitational instability sets in at sufficiently high densities, signatures of star formation appear to be similar in both regions. Moreover, the detection of green sources, even at the distance of the Galactic center, shows that our technique can easily identify the early stages of star formation, especially in low-extinction regions of the Galaxy. Through the association of H_2_O and CH_3_OH masers, we identify 15 star-forming sites in the CMZ. We find a higher correlation rate of coincident H_2_O and CH_3_OH masers within the CMZ compared to the Galactic disk, indicating a difference in the maser evolutionary sequence for star-forming cores in these two regions.

Keywords
  1. astrophysical-masers
  2. radio-astronomy
Bibliographic source Bibcode
2014A&A...563A..68C
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/563/A68
IVOA Identifier IVOID
ivo://CDS.VizieR/J/A+A/563/A68
Document Object Identifer DOI
doi:10.26093/cds/vizier.35630068

Access

Web browser access HTML
http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/563/A68
https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/A+A/563/A68
http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/A+A/563/A68
IVOA Table Access TAP
http://tapvizier.cds.unistra.fr/TAPVizieR/tap
Run SQL-like queries with TAP-enabled clients (e.g., TOPCAT).
IVOA Cone Search SCS
For use with a cone search client (e.g., TOPCAT).
http://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/563/A68/table2?
https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/563/A68/table2?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/563/A68/table2?
IVOA Cone Search SCS
For use with a cone search client (e.g., TOPCAT).
http://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/563/A68/tableb1?
https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/563/A68/tableb1?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/563/A68/tableb1?
IVOA Cone Search SCS
For use with a cone search client (e.g., TOPCAT).
http://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/563/A68/tableb2?
https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/563/A68/tableb2?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/563/A68/tableb2?
IVOA Cone Search SCS
For use with a cone search client (e.g., TOPCAT).
http://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/563/A68/tableb3?
https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/563/A68/tableb3?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/563/A68/tableb3?
IVOA Cone Search SCS
For use with a cone search client (e.g., TOPCAT).
http://vizier.cds.unistra.fr/viz-bin/conesearch/J/A+A/563/A68/tableb4?
https://vizier.iucaa.in/viz-bin/conesearch/J/A+A/563/A68/tableb4?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/A+A/563/A68/tableb4?

History

2014-06-25T14:46:04Z
Resource record created
2014-06-25T14:46:04Z
Created
2017-10-12T13:00:43Z
Updated

Contact

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