Published 2007
| Version v1
Journal article
Deep imaging survey of the environment of alpha Centauri. II. CCD imaging with the NTT-SUSI2 camera
Creators
Contributors
Others:
- Laboratoire d'études spatiales et d'instrumentation en astrophysique (LESIA (UMR_8109)) ; Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de Paris ; Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)
- Laboratoire de Cosmologie, Astrophysique Stellaire & Solaire, de Planétologie et de Mécanique des Fluides (CASSIOPEE) ; Université Nice Sophia Antipolis (1965 - 2019) (UNS) ; COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Institut national des sciences de l'Univers (INSU - CNRS)-Observatoire de la Côte d'Azur ; COMUE Université Côte d'Azur (2015-2019) (COMUE UCA)-Université Côte d'Azur (UCA)-Université Côte d'Azur (UCA)-Centre National de la Recherche Scientifique (CNRS)
Description
Context: Thanks to its proximity, alpha Centauri is an outstanding target for an imaging search for extrasolar planets.
Aims: We searched for faint comoving companions to alpha Cen located at angular distances of a few tens of arcseconds, up to 2-3 arcmin.
Methods: We obtained CCD images from the NTT-SUSI2 instrument in the Bessel V, R, I, and Z bands, and archive data from 2MASS.
Results: We present a catalogue of the detected objects inside a 5.5 arcmin box around this star. A total of 4313 sources down to mV ≈ 24 and mI ≈ 22 were detected in the SUSI2 images. The infrared photometry of part of these sources has been extracted from the 2MASS images.
Conclusions: .No comoving companion to alpha Centauri were detected between 100 and 300 AU, down to a maximum mass of ≈15 times Jupiter. We also mostly exclude the presence of a companion more massive than 30 MJ between 50 and 100 AU.
Aims: We searched for faint comoving companions to alpha Cen located at angular distances of a few tens of arcseconds, up to 2-3 arcmin.
Methods: We obtained CCD images from the NTT-SUSI2 instrument in the Bessel V, R, I, and Z bands, and archive data from 2MASS.
Results: We present a catalogue of the detected objects inside a 5.5 arcmin box around this star. A total of 4313 sources down to mV ≈ 24 and mI ≈ 22 were detected in the SUSI2 images. The infrared photometry of part of these sources has been extracted from the 2MASS images.
Conclusions: .No comoving companion to alpha Centauri were detected between 100 and 300 AU, down to a maximum mass of ≈15 times Jupiter. We also mostly exclude the presence of a companion more massive than 30 MJ between 50 and 100 AU.
Abstract
Astronomy and Astrophysics, 464, pp. 373-375, http://dx.doi.org./10.1051/0004-6361:20066432Abstract
International audienceAdditional details
Identifiers
- URL
- https://hal.archives-ouvertes.fr/hal-00388124
- URN
- urn:oai:HAL:hal-00388124v1
Origin repository
- Origin repository
- UNICA