SPITZER/INFRARED ARRAY CAMERA LIMITS TO PLANETARY COMPANIONS OF FOMALHAUT AND ϵ ERIDANI
| Autor: | S. T. Megeath, M. Marengo, M. W. Werner, Joseph C. Carson, Giovanni G. Fazio, Joseph L. Hora, K. R. Stapelfeldt, M. T. Schuster |
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| Rok vydání: | 2009 |
| Předmět: |
Physics
Astronomy and Astrophysics Astrophysics::Cosmology and Extragalactic Astrophysics Astrophysics Stable point law.invention Telescope Stars Fomalhaut Space and Planetary Science law Planet Astrophysics::Solar and Stellar Astrophysics Astrophysics::Earth and Planetary Astrophysics Astrophysics::Galaxy Astrophysics |
| Zdroj: | The Astrophysical Journal. 700:1647-1657 |
| ISSN: | 1538-4357 0004-637X |
| DOI: | 10.1088/0004-637x/700/2/1647 |
| Popis: | Fomalhaut and epsilon Eridani are two young, nearby stars that possess extended debris disks whose structures suggest the presence of perturbing planetary objects. With its high sensitivity and stable point spread function, Spitzer/IRAC is uniquely capable of detecting cool, Jupiter-like planetary companions whose peak emission is predicted to occur near 4.5 um. We report on deep IRAC imaging of these two stars, taken at 3.6 and 4.5 um using subarray mode and in all four channels in wider-field full array mode. Observations acquired at two different telescope roll angles allowed faint surrounding objects to be separated from the stellar diffraction pattern. No companion candidates were detected at the reported position of Fomalhaut b with 3 sigma model-dependent mass upper limits of 3 MJ (for an age of 200 Myr). Around epsilon Eridani we instead set a limit of 4 and |
| Databáze: | OpenAIRE |
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