Site Map
Contacts
Follow us on Facebook Follow us on Twitter YouTube channel
Centro de Astrofísica da Universidade do Porto

Extrasolar planets and brown dwarfs around A-F type stars.
VIII. A giant planet orbiting the young star HD113337

S. Borgniet, I. Boisse, A.-M. Lagrange, F. Bouchy, L. Arnold, R. F. Díaz, F. Galland, P. Delorme, G. Hébrard, A. Santerne, D. Ehrenreich, D. Ségransan, X. Bonfils, X. Delfosse, N. C. Santos, T. Forveille, C. Moutou, S. Udry, A. Eggenberger, F. Pepe, N. Astudillo, G. Montagnier

Abstract
Aims. In the context of the search for extrasolar planets and brown dwarfs around early-type main-sequence stars, we present the detection of a giant planet around the young F-type star HD113337.We estimated the age of the system to be 150+100-50 Myr. Interestingly, an IR excess attributed to a cold debris disk was previously detected on this star.
Methods. The SOPHIE spectrograph on the 1.93m telescope at Observatoire de Haute-Provence was used to obtain ≃ 300 spectra over 6 years. We used our SAFIR tool, dedicated to the spectra analysis of A and F stars, to derive the radial velocity variations.
Results. The data reveal a 324.0+1.7-3.3 days period that we attribute to a giant planet with a minimum mass of 2.83 ± 0.24 MJup in an eccentric orbit with e = 0.46 ± 0.04. A long-term quadratic drift, that we assign to be probably of stellar origin, is superimposed to the Keplerian solution.

Keywords
techniques: radial velocities - stars: early-type - stars: planetary systems - stars: individual: HD113337

Notes
Based on observations made with the SOPHIE spectrograph at the Observatoire de Haute-Provence (CNRS, France).
Table 2 is only available in electronic form at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via http://cdsarc.u-strasbg.fr/viz-bin/qcat?J/A+A/561/A65

Astronomy and Astrophysics
Volume 561, Page A65_1
January 2014

>> PDF>> ADS>> DOI

Institute of Astrophysics and Space Sciences

Institute of Astrophysics and Space Sciences (IA) is a new but long anticipated research infrastructure with a national dimension. It embodies a bold but feasible vision for the development of Astronomy, Astrophysics and Space Sciences in Portugal, taking full advantage and fully realizing the potential created by the national membership of the European Space Agency (ESA) and the European Southern Observatory (ESO). IA resulted from the merging the two most prominent research units in the field in Portugal: the Centre for Astrophysics of the University of Porto (CAUP) and the Center for Astronomy and Astrophysics of the University of Lisbon (CAAUL). It currently hosts more than two-thirds of all active researchers working in Space Sciences in Portugal, and is responsible for an even greater fraction of the national productivity in international ISI journals in the area of Space Sciences. This is the scientific area with the highest relative impact factor (1.65 times above the international average) and the field with the highest average number of citations per article for Portugal.

Proceed on CAUP's website|Go to IA website