J/A+A/572/A49 WASP-94AB photometry and radial velocities (Neveu-VanMalle+, 2014)
WASP-94 A and B planets: hot-Jupiter cousins in a twin star system.
Neveu-VanMalle M., Queloz D., Anderson D.R., Charbonnel C.,
Collier-Cameron A., Delrez L., Gillon M., Hellier C., Jehin E., Lendl M.,
Maxted P.F.L., Pepe F., Pollacco D., Segransan D., Smalley B., Smith A.M.S.,
Southworth J., Triaud A.H.M.J., Udry S., West R.G.
<Astron. Astrophys. 572, A49 (2014)>
=2014A&A...572A..49N 2014A&A...572A..49N
ADC_Keywords: Stars, double and multiple ; Planets ; Photometry ;
Radial velocities
Keywords: planetary systems - stars: individual: WASP-94 -
techniques: photometric - techniques: radial velocities -
techniques: spectroscopic - binaries: visual
Abstract:
We report the discovery of two hot-Jupiter planets, one orbiting each
star of a wide binary system. WASP-94A (2MASS 20550794-3408079) is an
F8 type star hosting a transiting planet with a radius of
1.72±0.06RJup, a mass of 0.445+/ 0.026MJup and an orbital period
of 3.95 days. The Rossiter-McLaughlin effect is clearly detected and
the measured projected spin-orbit angle indicates that the planet
occupies a retrograde orbit. WASP-94B (2MASS 20550915-3408078) is an
F9 stellar companion at an angular separation of 15" (projected
separation 2700AU), hosting a gas giant of minimum mass
0.617±0.028MJup with a period of 2.008-days, detected by Doppler
measurements. The orbital planes of the two planets are inclined
relative to each other, indicating that at least one of them is
inclined relative to the plane of the stellar binary. These hot
Jupiters in a binary system bring new insights into the formation of
close-in giant planets and the role of stellar multiplicity.
Description:
Photometric time-series obtained for the hot Jupiter WASP-94A b, and
RV time-series obtained for the two hot Jupiters WASP-94A b and
WASP-94B b. The photometric time-series were obtained using the
TRAPPIST and Euler-Swiss telescopes. The RVs were obtained using the
Euler/CORALIE spectrograph.
Objects:
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RA (2000) DE Designation(s)
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20 55 07.94 -34 08 07.9 WASP-94A = 2MASS J20550794-3408079
20 55 09.16 -34 08 07.9 WASP-94B = 2MASS J20550915-3408078
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
w94a_rv.dat 59 48 Radial Velocity time-series obtained by
Euler/CORALIE for WASP-94A
w94b_rv.dat 59 21 Radial Velocity time-series obtained by
Euler/CORALIE for WASP-94B
w94a_phr.dat 63 556 Gunn-r' filter photometric time-series
obtained by Euler for WASP-94A
w94a_phz.dat 63 283 z' filter photometric time-series obtained
by TRAPPIST for WASP-94A
w94a_piz.dat 63 2590 I+z filter photometric time-series obtained
by TRAPPIST for WASP-94A
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See also:
J/A+A/563/A143 : WASP-68b, WASP-73b, WASP-88b transits (Delrez+, 2014)
J/A+A/568/A81 : WASP-117b photometry and radial velocities (Lendl+, 2014)
Byte-by-byte Description of file: w94a_rv.dat w94b_rv.dat
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Bytes Format Units Label Explanations
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1- 11 F11.6 d BJD Barycentric Julian Date (BJD-2450000)
15- 22 F8.5 km/s RV Radial velocity
26- 32 F7.5 km/s e_RV Radial velocity error (photon noise)
36- 43 F8.5 km/s FWHM CCF Full Width Half Maximum
47- 52 F6.3 km/s Span Bisector span
56- 59 I4 s ExpTime Exposure time
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Byte-by-byte Description of file: w94a_phr.dat w94a_phz.dat w94a_piz.dat
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Bytes Format Units Label Explanations
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1- 11 F11.6 d HJD Heliocentric Julian Date (HJD-2450000)
13- 20 F8.6 --- Flux Normalized Flux
22- 29 F8.6 --- e_Flux Normalized Flux error
31- 35 F5.2 pix xshift Pixel shift in x-direction
37- 42 F6.2 pix yshift Pixel shift in y-direction
44- 47 F4.2 --- AirM Airmass
49- 53 F5.2 pix FWHM Stellar Full-Width at Half Maximum
55- 60 F6.2 --- Sky Sky level (Flux)
62- 63 I2 s ExpTime [8/40] Exposure time
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Acknowledgements:
Marion Neveu-VanMalle, marion.neveu(at)unige.ch
(End) M. Neveu-VanMalle [Obs Geneva, Switzerland], P. Vannier [CDS] 23-Sep-2014