J/A+A/599/A3 WASP 127, 136 and 138 RV and light curves (Lam+, 2017)
From dense hot Jupiter to low-density Neptune:
The discovery of WASP-127b, WASP-136b, and WASP-138b.
Lam K.W.F., Faedi F., Brown D.J.A., Anderson D.R., Delrez L., Gillon M.,
Hebrard G., Lendl M., Mancini L., Southworth J., Smalley B., Triaud A.H.M.,
Turner O.D., Hay K.L., Armstrong D.J., Barros S.C.C., Bonomo A.S.,
Bouchy F., Boumis P., Collier Cameron A., Doyle A.P., Hellier C.,
Henning T., Jehin E., King G., Kirk J., Louden T., Maxted P.F.L.,
McCormac J.J., Osborn H.P., Palle E., Pepe F., Pollacco D.,
Prieto-Arranz J., Queloz D., Rey J., Segransan D., Udry S., Walker S.,
West R.G., Wheatley P.J.
<Astron. Astrophys. 599, A3 (2017)>
=2017A&A...599A...3L 2017A&A...599A...3L (SIMBAD/NED BibCode)
ADC_Keywords: Stars, double and multiple ; Planets ; Radial velocities
Keywords: planetary systems - stars: individual: WASP-127 -
techniques: radial velocities - techniques: photometric -
stars: individual; WASP-136 - stars: individual; WASP-138
Abstract:
We report three newly discovered exoplanets from the SuperWASP survey.
WASP-127b is a heavily inflated super-Neptune of mass 0.18±0.02 MJ
and radius 1.37±0.04 RJ. This is one of the least massive planets
discovered by the WASP project. It orbits a bright host star
(Vmag=10.16) of spectral type G5 with a period of 4.17 days.
WASP-127b is a low-density planet that has an extended atmosphere with
a scale height of 2500±400km, making it an ideal candidate for
transmission spectroscopy. WASP-136b and WASP-138b are both hot
Jupiters with mass and radii of 1.51±0.08MJ and 1.38±0.16RJ,
and 1.22±0.08MJ and 1.09±0.05RJ, respectively. WASP-136b is in
a 5.22-day orbit around an F9 subgiant star with a mass of
1.41±0.07M☉ and a radius of 2.21±0.22R☉. The discovery
of WASP-136b could help constrain the characteristics of the giant
planet population around evolved stars. WASP-138b orbits an F7 star
with a period of 3.63 days. Its radius agrees with theoretical values
from standard models, suggesting the presence of a heavy element core
with a mass of ∼10M{earth}. The discovery of these new planets helps
in exploring the diverse compositional range of short-period planets,
and will aid our understanding of the physical characteristics of both
gas giants and low-density planets.
Description:
Photometric time-series obtained for the WASP-127, WASP-136, and
WASP-138, and RV time-series obtained for the three systems. 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) (Period(d))
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10 42 14.08 -03 50 06.3 WASP-127 = 2MASS J10421407-0350062 (P=4.178062)
00 01 18.17 -08 55 34.6 WASP-136 = 2MASS J00011818-0855347 (P=5.215357)
02 46 33.37 -00 27 50.0 WASP-138 (P=3.634433)
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table7.dat 48 41 Radial Velocity time-series and line bisector
for WASP-127
table8.dat 48 23 Radial Velocity time-series and line bisector
for WASP-136
table9.dat 48 20 Radial Velocity time-series and line bisector
for WASP-138
table10.dat 64 13905 Photometric time-series obtained by EulerCAM,
TRAPPIST, RISE, and ZEISS for WASP-127
table11.dat 65 1380 Photometric time-series obtained by EulerCAM,
and TRAPPIST for WASP-136
table12.dat 64 227 Photometric time-series obtained by EulerCAM
for WASP-138
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Byte-by-byte Description of file: table7.dat table8.dat table9.dat
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Bytes Format Units Label Explanations
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1- 12 F12.4 d BJD Barycentric Julian date
17- 22 F6.3 km/s RV Radial velocity
25- 29 F5.3 km/s e_RV rms uncertainty on RV
33- 38 F6.3 km/s Span Line bisector span
41- 48 A8 --- Inst Spectrograph name (SOPHIE, CORALIE) (1)
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Note (1): CORALIE data taken before instrumental upgrade are labeled with
'CORALIE1', while data taken after the upgrade are labeled with 'CORALIE2'.
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Byte-by-byte Description of file: table10.dat table11.dat table12.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)
17- 25 F9.6 --- Dmag Differential magnitude in Filter
34- 41 F8.6 --- e_Dmag Differential magnitude error
49- 54 A6 --- Filter Filter (z, Gunn r, I, V+R)
57- 65 A9 --- Inst Instrument name
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Acknowledgements:
Kristine Lam, w.f.lam(at)warwick.ac.uk
(End) K.W.F. Lam [Warwick, United Kingdom], Patricia Vannier [CDS] 09-Dec-2016