IR polarization data in the BN region Virtual Observatory Resource

Authors
  1. Poidevin F.
  2. Bastien P.
  3. Jones T.J.
  4. Published by
    CDS
Abstract

New visible and K-band polarization measurements of stars surrounding molecular clouds in Orion A and stars in the Becklin-Neugebauer (BN) vicinity are presented. Our results confirm that magnetic fields located inside the Orion A molecular clouds and in their close neighborhood are spatially connected. On and around the BN object, we measured the angular offsets between the K-band polarization data and available submillimeter (submm) data. We find high values of the polarization degree, P_K_, and of the optical depth, {tau}_K_, close to an angular offset position of 90{deg} whereas lower values of P_K_ and {tau}_K_ are observed for smaller angular offsets. We interpret these results as evidence for the presence of various magnetic field components toward lines of sight in the vicinity of BN. On a larger scale, we measured the distribution of angular offsets between available H-band polarization data and the same submm data set. Here we find an increase of <P_H_> with angular offset, which we interpret as a rotation of the magnetic field by <~60{deg}. This trend generalizes previous results on small scales toward and around lines of sight to BN and is consistent with a twist of the magnetic field on a larger scale toward OMC-1. A comparison of our results with several other studies suggests that a two-component magnetic field, perhaps helical, could be wrapping the OMC-1 filament.

Keywords
  1. molecular-clouds
  2. polarimetry
  3. infrared-sources
  4. magnetic-fields
Bibliographic source Bibcode
2011ApJ...741..112P
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/741/112
IVOA Identifier IVOID
ivo://CDS.VizieR/J/ApJ/741/112
Document Object Identifer DOI
doi:10.26093/cds/vizier.17410112

Access

Web browser access HTML
https://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/741/112
https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/741/112
http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/741/112
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/741/112/table5?
https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/741/112/table5?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/741/112/table5?

History

2017-09-11T09:26:24Z
Resource record created
2017-09-11T09:26:24Z
Created
2017-10-09T08:09:26Z
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