X-ray and IR sources in RCW 108 Virtual Observatory Resource

Authors
  1. Wolk S.J.
  2. Spitzbart B.D.
  3. Bourke T.L.
  4. Gutermuth R.A.
  5. Vigil M.,Comeron F.
  6. Published by
    CDS
Abstract

We report on the results of an approximately 90ks Chandra observation of a complex region that hosts multiple sites of recent and active star formation in ARA OB1a. The field is centered on the embedded cluster RCW 108-IR and includes a large portion of the open cluster NGC 6193. We detect over 420 X-ray sources in the field and combined these data with deep near-IR, Spitzer/IRAC and Midcourse Space Experiment (MSX) mid-IR data. We find about 360 of the X-ray sources have near-IR counterparts. We divide the region into five parts based on the X-ray point source characteristics and extended 8um emission. The most clearly defined regions are the central region, identified by embedded sources with high luminosities in both the near-IR and X-ray as well as high X-ray temperatures (~3keV), and the eastern region, identified by low extinction and ~1keV X-ray temperatures. The cluster members range in X-ray luminosity from 10^29^ to 10^33^erg/s. Over 18% of the cluster members with over 100 counts exhibit flares. All sources with over 350 counts are variable. Overall about 10% (16% in RCW 108-IR) appear to have optically thick disks as derived from their position in the (J-H), (H-K) diagram. The disk fraction becomes much higher when IRAC data are employed. We fit the bulk of the X-ray spectra as absorbed Raymond-Smith-type plasmas, and find that the column to the RCW 108-IR members varies from 10^21^ to 10^23^cm^-2^. We find that the field contains 41 candidate O or B stars, and estimate that the total number of pre-main-sequence stars in the field is about 1600+/-200.

Keywords
  1. h-ii-regions
  2. infrared-photometry
  3. x-ray-sources
Bibliographic source Bibcode
2008AJ....135..693W
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/135/693
IVOA Identifier IVOID
ivo://CDS.VizieR/J/AJ/135/693
Document Object Identifer DOI
doi:10.26093/cds/vizier.51350693

Access

Web browser access HTML
https://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/135/693
https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/AJ/135/693
http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/AJ/135/693
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/AJ/135/693/sources?
https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/135/693/sources?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/135/693/sources?
IVOA Cone Search SCS
For use with a cone search client (e.g., TOPCAT).
https://vizier.cds.unistra.fr/viz-bin/conesearch/J/AJ/135/693/table10?
https://vizier.iucaa.in/viz-bin/conesearch/J/AJ/135/693/table10?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/AJ/135/693/table10?

History

2010-07-21T13:55:53Z
Resource record created
2010-07-21T13:55:53Z
Created
2017-06-28T06:57:52Z
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