Polarimetry toward sightlines through ChaI Virtual Observatory Resource

Authors
  1. Andersson B.-G.
  2. Potter S.B.
  3. Published by
    CDS
Abstract

We have obtained optical multi-band polarimetry toward sightlines through the Chamaeleon I cloud, particularly in the vicinity of the young B9/A0 star HD 97300. We show, in agreement with earlier studies, that the radiation field impinging on the cloud in the projected vicinity of the star is dominated by the flux from the star, as evidenced by a local enhancement in the grain heating. By comparing the differential grain heating with the differential change in the location of the peak of the polarization curve, we show that the grain alignment is enhanced by the increase in the radiation field. We also find a weak, but measurable, variation in the grain alignment with the relative angle between the radiation field anisotropy and the magnetic field direction. Such an anisotropy in the grain alignment is consistent with a unique prediction of modern radiative alignment torque theory and provides direct support for radiatively driven grain alignment.

Keywords
  1. polarimetry
  2. visible-astronomy
  3. Wide-band photometry
  4. molecular-clouds
  5. extinction
  6. interstellar-medium
Bibliographic source Bibcode
2010ApJ...720.1045A
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/720/1045
IVOA Identifier IVOID
ivo://CDS.VizieR/J/ApJ/720/1045
Document Object Identifer DOI
doi:10.26093/cds/vizier.17201045

Access

IVOA Table Access TAP
https://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).
https://vizier.cds.unistra.fr/viz-bin/conesearch/J/ApJ/720/1045/polarim?
https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/720/1045/polarim?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/720/1045/polarim?

History

2012-07-13T07:47:22Z
Resource record created
2012-07-13T07:47:22Z
Created
2017-06-22T14:28:33Z
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