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| DOI | 10.1088/2041-8205/738/1/L12 | ||||
| Año | 2011 | ||||
| Tipo | artículo de investigación |
Citas Totales
Autores Afiliación Chile
Instituciones Chile
% Participación
Internacional
Autores
Afiliación Extranjera
Instituciones
Extranjeras
Using a vector vortex coronagraph behind the 1.5 m well-corrected subaperture (WCS) at Palomar, we detected a second object very close to epsilon Cephei, a delta Scuti F0 IV star. The candidate companion, similar to 50 times fainter than epsilon Cephei, if physically associated, is a late-type K or early M star, and lies at an angular separation of 330 mas, or 1.1 lambda/D for the WCS, making it the smallest angle detection ever realized with a coronagraph in terms of lambda/D units. The projected separation of the putative companion is similar to 8.6 AU, most likely on a highly eccentric orbit. The recently detected near-infrared excess is thus likely not due to hot dust. Moreover, we also show that the previously reported IRAS 60 mu m excess was due to source confusion on the galactic plane.
| Ord. | Autor | Género | Institución - País |
|---|---|---|---|
| 1 | Mawet, Dimitri | Hombre |
ESO - Chile
CALTECH - Estados Unidos European Southern Observatory Santiago - Chile Jet Propulsion Laboratory - Estados Unidos Observatorio Europeo Austral - Chile |
| 2 | Mennesson, B. | Hombre |
CALTECH - Estados Unidos
Jet Propulsion Laboratory - Estados Unidos |
| 3 | Serabyn, Gene | Hombre |
CALTECH - Estados Unidos
Jet Propulsion Laboratory - Estados Unidos |
| 4 | Stapelfeldt, Karl R. | Hombre |
CALTECH - Estados Unidos
Jet Propulsion Laboratory - Estados Unidos |
| 5 | Absil, O. | Hombre |
Univ Liege - Bélgica
Universite de Liege - Bélgica |
| Agradecimiento |
|---|
| This work was carried out at the European Southern Observatory (ESO) site of Vitacura (Santiago, Chile), and the Jet Propulsion Laboratory (JPL), California Institute of Technology (Caltech), under contract with the National Aeronautics and Space Administration (NASA). The data presented in this Letter are based on observations obtained at the Hale Telescope, Palomar Observatory, as part of a continuing collaboration between Caltech, NASA/JPL, and Cornell University. This work is also based (in part) on observations made with the Spitzer Space Telescope, which is operated by the JPL, Caltech, under a contract with NASA. This research has made use of the NASA/IPAC/NExScI Star and Exoplanet Database, which is operated by the JPL, Caltech, under contract with NASA, and NASA's Astrophysics Data System and of the SIMBAD database, operated at CDS (Strasbourg, France). |