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27 papers · 2 filters
SOPHIE velocimetry of Kepler transit candidates: X KOI-142c: first radial velocity confirmation of a non-transiting exoplanet discovered by transit timing
S. C. C. Barros, R. F. Diaz, A. Santerne +9
The exoplanet KOI-142b (Kepler-88b) shows transit timing variations (TTVs) with a semi-amplitude of hours, earning the nickname of "king of transit variations". Only th…
Herschel and IRAM-30m Observations of Comet C/2012 S1 (ISON) at 4.5 AU from the Sun
L. O'Rourke, D. Bockelée-Morvan, N. Biver +9
Our goal was to characterize the distant gaseous and dust activity of comet C\2012 S1 (ISON), inbound, from observations of H2O, CO and the dust coma in the far-infrared and submil…
The SOPHIE search for northern extrasolar planets: VI. Three new hot Jupiters in multi-planet extrasolar systems
C. Moutou, G. Hebrard, F. Bouchy +21
We present high-precision radial-velocity measurements of three solar-type stars: HD 13908, HD 159243, and HIP 91258. The observations were made with the SOPHIE spectrograph at the…
Characterizing the Dust Coma of Comet C/2012 S1 (ISON) at 4.15 AU from the Sun
Jian-Yang Li, Michael S. P. Kelley, Matthew M. Knight +7
We report results from broadband visible images of comet C/2012 S1 (ISON) obtained with the Hubble Space Telescope Wide Field Camera 3 on 2013 April 10. C/ISON's coma brightness fo…
Three irradiated and bloated hot Jupiters: WASP-76b, WASP-82b & WASP-90b
R. G. West, J. -M. Almenara, D. R. Anderson +22
We report three new transiting hot-Jupiter planets discovered from the WASP surveys combined with radial velocities from OHP/SOPHIE and Euler/CORALIE and photometry from Euler and…
Gas and dust productions of comet 103P/Hartley 2 from millimetre observations: interpreting rotation-induced time variations
J. Boissier, D. Bockelée-Morvan, N. Biver +7
Comet 103P/Hartley 2 made a close approach to the Earth in October 2010. It was the target of an extensive observing campaign and was visited by the Deep Impact spacecraft (mission…
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 +19
In the frame 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 HD…
Characterizing small planets transiting small stars with SPIRou
A. Santerne, J. -F. Donati, R. Doyon +9
SPIRou, a near infrared spectropolarimeter, is a project of new instrument to be mounted at the Canada France Hawaii Telescope in 2017. One of the main objectives of SPIRou is to r…
Structure, stability and evolution of 3D Rossby vortices in protoplanetary disks
Samuel Richard, Pierre Barge, Stephane Le Dizes
Large-scale persistent vortices are known to form easily in 2D disks via the Rossby wave or the baroclinic instability. In 3D, however, their formation and stability is a complex i…
SOPHIE velocimetry of Kepler transit candidates IX. KOI-415 b: a long-period, eccentric transiting brown dwarf to an evolved Sun
C. Moutou, A. S. Bonomo, G. Bruno +8
We report the discovery of a long-period brown-dwarf transiting companion of the solar-type star KOI-415. The transits were detected by the Kepler space telescope. We conducted Dop…
The contribution of secondary eclipses as astrophysical false positives to exoplanet transit surveys
A. Santerne, F. Fressin, R. F. Díaz +3
We investigate in this paper the astrophysical false-positive configuration in exoplanet-transit surveys that involves eclipsing binaries and giant planets which present only a sec…
Millimetre continuum observations of comet C/2009 P1 (Garradd)
J. Boissier, D. Bockelée-Morvan, O. Groussin +7
Little is known about the physical properties of the nuclei of Oort cloud comets. Measuring the thermal emission of a nucleus is one of the few means for deriving its size and cons…
Thermal Properties, Sizes, and Size Distribution of Jupiter-Family Cometary Nuclei
Y. R. Fernandez, M. S. Kelley, P. L. Lamy +14
We present results from SEPPCoN, an on-going Survey of the Ensemble Physical Properties of Cometary Nuclei. In this report we discuss mid-infrared measurements of the thermal emiss…
Discovery of WASP-65b and WASP-75b: Two Hot Jupiters Without Highly Inflated Radii
Y. Gómez Maqueo Chew, F. Faedi, D. Pollacco +38
We report the discovery of two transiting hot Jupiters, WASP-65b (M_pl = 1.55 +/- 0.16 M_J; R_pl = 1.11 +/- 0.06 R_J), and WASP-75b (M_pl = 1.07 +/- 0.05 M_J; R_pl = 1.27 +/- 0.05…
CoRoT: harvest of the exoplanet program
Claire Moutou, Magali Deleuil, Tristan Guillot +7
One of the objectives of the CoRoT mission is the search for transiting extrasolar planets using high-precision photometry, and the accurate characterization of their fundamental p…
Lucky Imaging of transiting planet host stars with LuckyCam
F. Faedi, T. Staley, Y. Gomez Maqueo Chew +7
We obtained high-resolution, high-contrast optical imaging in the SDSS band with the LuckyCam camera mounted on the 2.56m Nordic Optical Telescope, to search for faint stellar…
CHEOPS: A Transit Photometry Mission for ESA's Small Mission Programme
C. Broeg, A. Fortier, D. Ehrenreich +18
Ground based radial velocity (RV) searches continue to discover exoplanets below Neptune mass down to Earth mass. Furthermore, ground based transit searches now reach milli-mag pho…
KOI-200b and KOI-889b: two transiting exoplanets detected and characterized with Kepler, SOPHIE and HARPS-N
G. Hebrard, J. -M. Almenara, A. Santerne +8
We present the detection and characterization of the two new transiting, close-in, giant extrasolar planets KOI-200b and KOI-889b. They were first identified by the Kepler team as…
Astrophysical false positives in direct imaging for exoplanets: a white dwarf close to a rejuvenated star
A. Zurlo, A. Vigan, J. Hagelberg +17
As is the case for all techniques involved in the research for exoplanets, direct imaging has to take into account the probability of so-called astrophysical false positives, which…
The Persistent Activity of Jupiter-Family Comets at 3 to 7 AU
Michael S. Kelley, Yanga R. Fernandez, Javier Licandro +14
We present an analysis of comet activity based on the Spitzer Space Telescope component of the Survey of the Ensemble Physical Properties of Cometary Nuclei. We show that the surve…
Analysis of spin-orbit alignment in the WASP-32, WASP-38, and HAT-P-27/WASP-40 systems
D. J. A. Brown, A. Collier Cameron, R. F. Díaz +14
We present measurements of the spin-orbit alignment angle, lambda, for the hot Jupiter systems WASP-32, WASP-38, and HAT-P-27/WASP-40, based on data obtained using the HARPS spectr…
CoRoT 101186644: A transiting low-mass dense M-dwarf on an eccentric 20.7-day period orbit around a late F-star
L. Tal-Or, T. Mazeh, R. Alonso +10
We present the study of the CoRoT transiting planet candidate 101186644, also named LRc01_E1_4780. Analysis of the CoRoT lightcurve and the HARPS spectroscopic follow-up observatio…
Transmitting signals over interstellar distances: Three approaches compared in the context of the Drake equation
Luc Arnold
I compare three methods for transmitting signals over interstellar distances: radio transmitters, lasers and artificial transits. The quantitative comparison is based on physical q…
The secondary eclipses of WASP-19b as seen by the ASTEP 400 telescope from Antarctica
L. Abe, I. Gonçalves, A. Agabi +29
The ASTEP (Antarctica Search for Transiting ExoPlanets) program was originally aimed at probing the quality of the Dome C, Antarctica for the discovery and characterization of exop…