J/AJ/151/138 Discovery of 2 hot Jupiters KELT-14b & KELT-15b (Rodriguez+, 2016)
KELT-14b and KELT-15b: an independent discovery of WASP-122b and a new hot
Jupiter.
Rodriguez J.E., Colon K.D., Stassun K.G., Wright D., Cargile P.A.,
Bayliss D., Pepper J., Collins K.A., Kuhn R.B., Lund M.B., Siverd R.J.,
Zhou G., Gaudi B.S., Tinney C.G., Penev K., Tan T.G., Stockdale C.,
Curtis I.A., James D., Udry S., Segransan D., Bieryla A., Latham D.W.,
Beatty T.G., Eastman J.D., Myers G., Bartz J., Bento J., Jensen E.L.N.,
Oberst T.E., Stevens D.J.
<Astron. J., 151, 138-138 (2016)>
=2016AJ....151..138R 2016AJ....151..138R (SIMBAD/NED BibCode)
ADC_Keywords: Exoplanets ; Radial velocities
Keywords: planetary systems - stars: individual: KELT-14, KELT-15 -
techniques: photometric - techniques: radial velocities -
techniques: spectroscopic
Abstract:
We report the discovery of KELT-14b and KELT-15b, two hot Jupiters
from the KELT-South survey. KELT-14b, an independent discovery of the
recently announced WASP-122b, is an inflated Jupiter mass planet that
orbits a ∼5.0-0.7+0.3 Gyr, V=11.0, G2 star that is near the main
sequence turnoff. The host star, KELT-14 (TYC 7638-981-1), has an
inferred mass M*=1.18-0.07+0.05 M☉ and radius
R*=1.37±0.08 R☉, and has Teff=5802-92+95 K,
log g*=4.23-0.04+0.05 and [Fe/H]=0.33±0.09. The planet orbits
with a period of 1.7100588±0.0000025 days (T0=2457091.02863±0.00047)
and has a radius Rp=1.52-0.11+0.12 RJ and mass
Mp=1.196±0.072 MJ, and the eccentricity is consistent with zero.
KELT-15b is another inflated Jupiter mass planet that orbits a
∼4.6-0.4+0.5 Gyr, V=11.2, G0 star (TYC 8146-86-1) that is near the
"blue hook" stage of evolution prior to the Hertzsprung gap, and has
an inferred mass M*=1.181-0.050+0.051 M☉ and radius
R*=1.48-0.04+0.09 R☉, and Teff=6003-52+56 K,
log g*=4.17-0.04+0.02 and [Fe/H]=0.05±0.03. The planet orbits
on a period of 3.329441±0.000016 days (T0=2457029.1663±0.0073)
and has a radius Rp=1.443-0.057+0.11 RJ and mass
Mp=0.91-0.22+0.21 MJ and an eccentricity consistent with zero.
KELT-14b has the second largest expected emission signal in the K-band
for known transiting planets brighter than K<10.5. Both KELT-14b and
KELT-15b are predicted to have large enough emission signals that
their secondary eclipses should be detectable using ground-based
observatories.
Description:
Spectroscopic observations of KELT-14 and KELT-15 were carried out
using the CYCLOPS2 fiber feed with the UCLES spectrograph instrument
on the Anglo-Australian Telescope (AAT) over two observing runs:
UT 2015 February 02-UT 2015 March 01 and UT 2015 May 6-UT 2015 May 13.
The instrumental set-up and observing strategy for these observations
closely follow that described in earlier CYCLOPS RV papers (Addison et al.
2013ApJ...774L...9A 2013ApJ...774L...9A, 2014ApJ...792..112A 2014ApJ...792..112A).
CORALIE is a fiber-fed echelle spectrograph (Queloz et al.
2001Msngr.105....1Q 2001Msngr.105....1Q) attached to the Swiss 1.2 m Leonard Euler telescope
at the ESO La Silla Observatory in Chile. It has a spectral resolution
of R∼60000, a wavelength range of 3900-6800 Å, and is able to measure
radial velocities of bright stars to a precision of 3 m/s or better
(Pepe et al. 2002, J/A+A/388/632). We obtained spectra at five epochs of
KELT-15 from UT 2015 September 02 to UT 2015 September 14.
Objects:
------------------------------------------------------
RA (ICRS) DE Designation(s)
------------------------------------------------------
07 13 12.35 -42 24 35.1 KELT-14 = WASP-122
07 13 12.35 -42 24 35.2 KELT-14b = WASP-122b
07 49 39.61 -52 07 13.6 KELT-15 = TYC 8146-86-1
07 49 39.60 -52 07 13.5 KELT-15b = KELT-15b
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File Summary:
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FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table5.dat 42 15 KELT-14 Radial Velocity Observations with
CYCLOPS2
table6.dat 42 19 KELT-15 Radial Velocity Observations with
CYCLOPS2 and CORALIE
table9.dat 46 8 Transit Times for KELT-14b
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See also:
J/A+A/388/632 : Radial-velocity of HD 108147 and HD 168746 (Pepe+, 2002)
J/ApJ/757/18 : Radial velocities for 16 hot Jupiter host stars
(Albrecht+, 2012)
J/ApJ/761/123 : KELT-1 photometry and spectroscopy follow-up (Siverd+, 2012)
J/AJ/152/136 : Follow-up photometry and spectroscopy of KELT-17 (Zhou+, 2016)
J/AJ/153/215 : Photometry and spectroscopy of KELT-11 (Pepper+, 2017)
Byte-by-byte Description of file: table5.dat table6.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 17 F17.9 d BJD Barycentric Julian Date; TBD (G1)
19- 26 F8.2 m/s RV [12057.5/34794.2] Radial velocity
28- 33 F6.2 m/s e_RV [5.2/118] Uncertainty in RV
35- 42 A8 --- Inst Instrument (CYCLOPS2 or CORALIE)
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Byte-by-byte Description of file: table9.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 3 I3 --- Epoch [-29/13] Epoch
5- 18 F14.6 d TC Time of inferior conjunction, TC, in Barycentric
Julian Date; TBD (G1)
20- 22 I3 s e_TC Uncertainty in TC (σTC)
24- 30 F7.2 s O-C1 [-316.62/455.19] Transit time residual
32- 36 F5.2 s O-C2 [-2.78/3.37] The (O-C) value for σTC
38- 46 A9 --- Tel Telescope (1)
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Note (1): Telescope as follows:
PEST = Perth Exoplanet Survey Telescope (PEST) observatory, a backyard
observatory owned and operated by ThiamGuan (TG) Tan, located in
Perth, Australia;
ICO = The Adelaide Observatory, owned and operated by Ivan Curtis is
located in Adelaide, Australia (labeled "ICO");
Hazelwood = The Hazelwood Observatory, operated by Chris Stockdale in
Victoria, Australia;
LCOGT = A 1 m telescope in the Las Cumbres Observatory Global Telescope
(LCOGT) network (http://lcogt.net/) located at Cerro Tololo
Inter-American Observatory (CTIO) in Chile.
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Global notes:
Note (G1): Times are in the BJDTDB standard, Eastman et al.
(2010PASP..122..935E 2010PASP..122..935E).
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History:
From electronic version of the journal
(End) Prepared by [AAS], Tiphaine Pouvreau [CDS] 09-Apr-2018