Distances to molecular clouds in fourth quadrant Virtual Observatory Resource

Authors
  1. Chen B.
  2. Wang S.
  3. Hou L.
  4. Yang Y.
  5. Li Z.
  6. Zhao H.
  7. Jiang B.
  8. Published by
    CDS
Abstract

Distance measurements to molecular clouds are essential and important. We present directly measured distances to 169 molecular clouds in the fourth quadrant of the Milky Way. Based on the near-infrared photometry from the Two Micron All Sky Survey and the Vista Variables in the Via Lactea Survey, we select red clump stars in the overlapping directions of the individual molecular clouds and infer the bin averaged extinction values and distances to these stars. We track the extinction versus distance profiles of the sightlines towards the clouds and fit them with Gaussian dust distribution models to find the distances to the clouds. We have obtained distances to 169 molecular clouds selected from Rice et al. (2016ApJ...822...52R). The clouds range in distances between 2 and 11kpc from the Sun. The typical internal uncertainties in the distances are less than 5 per cent and the systematic uncertainty is about 7 per cent. The catalogue presented in this work is one of the largest homogeneous catalogues of distant molecular clouds with the direct measurement of distances. Based on the catalogue, we have tested different spiral arm models from the literature.

Keywords
  1. molecular-clouds
  2. interstellar-medium
  3. extinction
  4. milky-way-galaxy
  5. infrared-astronomy
Bibliographic source Bibcode
2020MNRAS.496.4637C
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/MNRAS/496/4637
IVOA Identifier IVOID
ivo://CDS.VizieR/J/MNRAS/496/4637

Access

Web browser access HTML
http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/MNRAS/496/4637
https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/MNRAS/496/4637
http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/MNRAS/496/4637
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/MNRAS/496/4637/table1?
https://vizier.iucaa.in/viz-bin/conesearch/J/MNRAS/496/4637/table1?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/MNRAS/496/4637/table1?

History

2023-10-13T14:50:24Z
Resource record created
2023-10-13T13:51:00Z
Updated
2023-10-13T14:50:24Z
Created

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