WISE/NEOWISE observations of Hilda asteroids Virtual Observatory Resource

Authors
  1. Grav T.
  2. Mainzer A.K.
  3. Bauer J.
  4. Masiero J.
  5. Spahr T.
  6. McMillan R.S.,Walker R.
  7. Cutri R.
  8. Wright E.
  9. Eisenhardt P.R.
  10. Blauvelt E.
  11. DeBaun E.,Elsbury D.
  12. Gautier T.
  13. Gomillion S.
  14. Hand E.
  15. Wilkins A.
  16. Published by
    CDS
Abstract

We present the preliminary analysis of 1023 known asteroids in the Hilda region of the solar system observed by the NEOWISE component of the Wide-field Infrared Survey Explorer (WISE). The sizes of the Hildas observed range from ~3 to 200km. We find no size-albedo dependency as reported by other projects. The albedos of our sample are low, with a weighted mean value of p_V_=0.055+/-0.018, for all sizes sampled by the NEOWISE survey. We observed a significant fraction of the objects in the two known collisional families in the Hilda population. It is found that the Hilda collisional family is brighter, with a weighted mean albedo of p_V_=0.061+/-0.011, than the general population and dominated by D-type asteroids, while the Schubart collisional family is darker, with a weighted mean albedo of p_V_=0.039+/-0.013. Using the reflected sunlight in the two shortest WISE bandpasses, we are able to derive a method for taxonomic classification of ~10% of the Hildas detected in the NEOWISE survey. For the Hildas with diameter larger than 30km, there are 67^+7^_-15_% D-type asteroids and 26^+17^_-5_% C-/P-type asteroids (with the majority of these being P-types).

Keywords
  1. asteroids
  2. infrared-sources
  3. surveys
Bibliographic source Bibcode
2012ApJ...744..197G
See also HTML
https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/744/197
IVOA Identifier IVOID
ivo://CDS.VizieR/J/ApJ/744/197
Document Object Identifer DOI
doi:10.26093/cds/vizier.17440197

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http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/744/197
https://vizier.iucaa.in/viz-bin/VizieR-2?-source=J/ApJ/744/197
http://vizieridia.saao.ac.za/viz-bin/VizieR-2?-source=J/ApJ/744/197
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History

2013-08-05T08:46:46Z
Resource record created
2013-08-05T08:46:46Z
Created
2017-11-06T12:24:02Z
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