Kinematic distance ambiguity in HII regions Virtual Observatory Resource

Authors
  1. Jones C.
  2. Dickey J.M.
  3. Published by
    CDS
Abstract

Using H I absorption spectra from the International Galactic Plane Survey, a new method is implemented to resolve the kinematic distance ambiguity for 75 H II regions with known systemic velocities from radio recombination lines. A further 40 kinematic distance determinations are made for H II region candidates without known systemic velocities through an investigation of the presence of H I absorption around the terminal velocity. New kinematic distance determinations can be used to further constrain spiral arm parameters and the location and extent of other structures in the Milky Way disk. H I absorption toward continuum sources beyond the solar circle is also investigated. Follow-up studies of H I at higher resolution than the 1' to 2' of existing Galactic Plane Surveys will provide kinematic distances to many more H II regions on the far side of the Galactic center. On the basis of the velocity channel summation technique developed in this paper, a much larger sample of H II regions will be analyzed in a future paper to remove the near-far distance ambiguity.

Keywords
  1. h-ii-regions
  2. h-i-line-emission
  3. infrared-sources
  4. radio-sources
Bibliographic source Bibcode
2012ApJ...753...62J
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/753/62
IVOA Identifier IVOID
ivo://CDS.VizieR/J/ApJ/753/62
Document Object Identifer DOI
doi:10.26093/cds/vizier.17530062

Access

Web browser access HTML
http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/753/62
https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/753/62
http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/753/62
IVOA Table Access TAP
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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/ApJ/753/62/table2?
https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/753/62/table2?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/753/62/table2?

History

2014-03-12T08:43:27Z
Resource record created
2014-03-12T08:43:27Z
Created
2017-11-29T11:48:41Z
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