WISE IR excesses among main sequence stars Virtual Observatory Resource

Authors
  1. Da Costa A.D.
  2. Canto Martins B.L.
  3. Leao I.C.
  4. Lima Jr J.E.,Freire da Silva D.
  5. de Freitas D.B.
  6. de Medeiros J.R.
  7. Published by
    CDS
Abstract

This study presents a search for infrared (IR) excess in the 3.4, 4.6, 12, and 22{mu}m bands in a sample of 216 targets, composed of solar sibling, twin, and analog stars observed by the Wide-field Infrared Survey Explorer (WISE) mission. In general, an IR excess suggests the existence of warm dust around a star. We detected 12{mu}m and/or 22{mu}m excesses at the 3{sigma} level of confidence in five solar analog stars, corresponding to a frequency of 4.1% of the entire sample of solar analogs analyzed, and in one out of 29 solar sibling candidates, confirming previous studies. The estimation of the dust properties shows that the sources with IR excesses possess circumstellar material with temperatures that, within the uncertainties, are similar to that of the material found in the asteroid belt in our solar system. No photospheric flux excess was identified at the W1 (3.4{mu}m) and W2 (4.6{mu}m) WISE bands, indicating that, in the majority of stars of the present sample, no detectable dust is generated. Interestingly, among the 60 solar twin stars analyzed in this work, no WISE photospheric flux excess was detected. However, a null-detection excess does not necessarily indicate the absence of dust around a star because different causes, including dynamic processes and instrument limitations, can mask its presence.

Keywords
  1. g-stars
  2. infrared-photometry
Bibliographic source Bibcode
2017ApJ...837...15D
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/837/15
IVOA Identifier IVOID
ivo://CDS.VizieR/J/ApJ/837/15
Document Object Identifer DOI
doi:10.26093/cds/vizier.18370015

Access

Web browser access HTML
http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/837/15
https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/837/15
http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/837/15
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/ApJ/837/15/table1?
https://vizier.iucaa.in/viz-bin/conesearch/J/ApJ/837/15/table1?
http://vizieridia.saao.ac.za/viz-bin/conesearch/J/ApJ/837/15/table1?

History

2017-11-09T15:10:21Z
Resource record created
2017-11-09T15:10:21Z
Created
2017-12-13T19:54:13Z
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