WISE/NEOWISE OBSERVATIONS OF THE JOVIAN TROJANS: PRELIMINARY RESULTS
| Autor: | T. Grav, A. K. Mainzer, J. Bauer, J. Masiero, T. Spahr, R. S. McMillan, R. Walker, R. Cutri, E. Wright, P. R. M. Eisenhardt, E. Blauvelt, E. DeBaun, D. Elsbury, T. Gautier, S. Gomillion, E. Hand, A. Wilkins |
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| Rok vydání: | 2011 |
| Předmět: |
Earth and Planetary Astrophysics (astro-ph.EP)
Physics education.field_of_study Infrared Population Mean value FOS: Physical sciences Astronomy and Astrophysics Astrophysics Albedo Jovian Preliminary analysis Space and Planetary Science Trojan education Order of magnitude Astrophysics - Earth and Planetary Astrophysics |
| Zdroj: | The Astrophysical Journal. 742:40 |
| ISSN: | 1538-4357 0004-637X |
| DOI: | 10.1088/0004-637x/742/1/40 |
| Popis: | We present the preliminary analysis of over 1739 known and 349 candidate Jovian Trojans observed by the NEOWISE component of the Wide-field Infrared Survey Explorer (WISE). With this survey the available diameters, albedos and beaming parameters for the Jovian Trojans have been increased by more than an order of magnitude compared to previous surveys. We find that the Jovian Trojan population is very homogenous for sizes larger than $\sim10$km (close to the detection limit of WISE for these objects). The observed sample consists almost exclusively of low albedo objects, having a mean albedo value of $0.07\pm0.03$. The beaming parameter was also derived for a large fraction of the observed sample, and it is also very homogenous with an observed mean value of $0.88\pm0.13$. Preliminary debiasing of the survey shows our observed sample is consistent with the leading cloud containing more objects than the trailing cloud. We estimate the fraction to be N(leading)/N(trailing) $\sim 1.4 \pm 0.2$, lower than the $1.6 \pm 0.1$ value derived by others. Accepted for publication in Astrophysical Journal. Electronic table will be available at the publishers website |
| Databáze: | OpenAIRE |
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