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The CORALIE survey for southern extra-solar planets XI. The return of the giant planet orbiting HD192263 | | N.C. Santos
; S. Udry
; M. Mayor
; D. Naef
; F. Pepe
; D. Queloz
; G. Burki
; N. Cramer
; B. Nicolet
; | | Date: |
22 May 2003 | | Journal: | Astron.Astrophys. 406 (2003) 373-382 | | Subject: | astro-ph | | Affiliation: | 1 and 2), S. Udry , M. Mayor , D. Naef , F. Pepe , D. Queloz , G. Burki , N. Cramer , B. Nicolet ( Geneva Observatory, Switzerland, Observatory of Lisbon, Portugal | | Abstract: | The presence of a planet around the K dwarf HD192263 was recently called into question by the detection of a periodic photometric signal with the same period as the one observed in radial velocity. In this paper, we investigate this possibility, using a combination of radial-velocity, photometry, and bisector measurements obtained simultaneously. The results show that while the observed radial-velocity variation is always very stable in phase, period, and amplitude, the photometric signal changes with time. The combined information strongly suggests that the observed radial-velocity variation is being produced by the presence of a planet, as firstly proposed. The photometric variations are either not connected to the planetary companion, or can eventually be induced by the interaction between the planet and the star. Finally, the radial-velocity data further show the presence of a long term trend, whose origin, still not clear, might be related to the presence of another companion to the system. | | Source: | arXiv, astro-ph/0305434 | | Services: | Forum | Review | PDF | Favorites | |
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