J/AJ/157/191 Light curve & radial velocities for TOI-172 (Rodriguez+, 2019)
An eccentric massive Jupiter orbiting a subgiant on a 9.5-day period discovered
in the Transiting Exoplanet Survey Satellite full frame images.
Rodriguez J.E., Quinn S.N., Huang C.X., Vanderburg A., Penev K., Brahm R.,
Jordan A., Ikwut-Ukwa M., Tsirulik S., Latham D.W., Stassun K.G.,
Shporer A., Ziegler C., Matthews E., Eastman J.D., Gaudi B.S., Collins K.A.,
Guerrero N., Relles H.M., Barclay T., Batalha N.M., Berlind P., Bieryla A.,
Bouma L.G., Boyd P.T., Burt J., Calkins M.L., Christiansen J., Ciardi D.R.,
Colon K.D., Conti D.M., Crossfield I.J.M., Daylan T., Dittmann J.,
Dragomir D., Dynes S., Espinoza N., Esquerdo G.A., Essack Z., Soto A.G.,
Glidden A., Gunther M.N., Henning T., Jenkins J.M., Kielkopf J.F.,
Krishnamurthy A., Law N.M., Levine A.M., Lewin P., Mann A.W., Morgan E.H.,
Morris R.L., Oelkers R.J., Paegert M., Pepper J., Quintana E.V.,
Ricker G.R., Rowden P., Seager S., Sarkis P., Schlieder J.E., Sha L.,
Tokovinin A., Torres G., Vanderspek R.K., Villanueva S., Villasenor J.N.,
Winn J.N., Wohler B., Wong I., Yahalomi D.A., Yu L., Zhan Z., Zhou G.
<Astron. J., 157, 191 (2019)>
=2019AJ....157..191R 2019AJ....157..191R (SIMBAD/NED BibCode)
ADC_Keywords: Stars, G-type ; Photometry ; Spectroscopy ; Radial velocities ;
Exoplanets
Keywords: planetary systems - planets and satellites: detection -
stars: individual (TIC 29857954)
Abstract:
We report the discovery of TOI-172 b from the Transiting Exoplanet Survey
Satellite (TESS) mission, a massive hot Jupiter transiting a slightly
evolved G star with a 9.48-day orbital period. This is the first planet
to be confirmed from analysis of only the TESS full frame images, because
the host star was not chosen as a two-minute cadence target. From a global
analysis of the TESS photometry and follow-up observations carried out by
the TESS Follow-up Observing Program Working Group, TOI-172 (TIC 29857954)
is a slightly evolved star with an effective temperature of
Teff=5645±50 K, a mass of M*=1.128-0.061+0.065 M☉, radius
of R*=1.777-0.044+0.047 R☉, a surface gravity of
log g*=3.993-0.028+0.027, and an age of 7.4-1.5+1.6 Gyr. Its
planetary companion (TOI-172 b) has a radius of
RP=0.965-0.029+0.032 RJ, a mass of MP=5.42-0.20+0.22 MJ,
and is on an eccentric orbit (e=0.3806-0.0090+0.0093). TOI-172 b is
one of the few known massive giant planets on a highly eccentric
short-period orbit. Future study of the atmosphere of this planet and
its system architecture offer opportunities to understand the formation
and evolution of similar systems.
Description:
TOI-172 fell on CCD 4 of Camera 1 of the TESS spacecraft during its
first sector of observations (2018 July 25-August 22), but it was not
pre-selected for two-minute cadence observations. After the data were
downloaded from the spacecraft, we processed the calibrated 30-minute
cadence full frame images (Jenkins et al. 2016SPIE.9913E..3EJ) with the
MIT Quick Look Pipeline (QLP; C. Huang et al., in preparation).
Spectra of TOI-172 were obtained on 27 occasions with a resolving power
of R∼44000 using the Tillinghast Reflector Echelle Spectrograph (TRES)
(Furesz 2008, PhD thesis University Szeged, Hungary) mounted on the 1.5 m
Tillinghast Reflector at the Fred L. Whipple Observatory (FLWO) on
Mt. Hopkins, Arizona. We also obtained nine R=48000 spectra of TOI-172
between UT 2018 October 19 and November 5 using the Fiber-fed Extended
Range Optical Spectrograph (FEROS; Kaufer et al. 1999Msngr..95....8K 1999Msngr..95....8K)
mounted on the 2.2 m Max Planck Gesellschaft (MPG) telescope at La Silla
observatory in Chile. Each spectrum achieved a signal-to-noise ratio
of ∼60-100 per spectral resolution element with exposure times of 600 s.
Objects:
------------------------------------------------------------------
RA (ICRS) DE Designation(s) (Period)
------------------------------------------------------------------
21 06 31.66 -26 41 33.5 TIC 29857954 = TOI 172 (P=9.47725)
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File Summary:
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FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
fig1.dat 39 1096 TESS 30-minute cadence light curve of TOI-172
table2.dat 47 38 Relative radial velocities for TOI-172
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See also:
J/ApJ/809/77 : Transiting Exoplanet Survey Satellite (TESS) (Sullivan+, 2015)
J/AJ/156/82 : Radial velocity characterization of TESS planets
(Cloutier+, 2018)
J/AJ/156/102 : The TESS Input Catalog and Candidate Target List
(Stassun+, 2018)
Byte-by-byte Description of file: fig1.dat
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Bytes Format Units Label Explanations
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1- 9 F9.4 d BJD [1325.32/1353] Barycentric Julian Date
(BJDTDB-2457000)
11- 20 F10.8 --- Flux-c [0.992529/1.00655] Corrected normalized
(baseline=1) flux
22- 31 F10.8 --- Flux-f [0.995520/1.00145] Flattened normalized
(baseline=1) flux
33- 39 F7.5 --- e_Flux [0.00045] Flux error
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Byte-by-byte Description of file: table2.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 14 F14.6 d BJD [2458376.73077/2458447.5724] Barycentric Dynamical
Time (BJDTDB)
16- 22 F7.1 m/s RV [-6654.1/422.1] Relative radial velocity
24- 27 F4.1 m/s e_RV [7/46] Uncertainty in RV
29- 36 F8.3 m/s BS [-123.3/38] Bisector span
38- 41 F4.1 m/s e_BS [2.3/51.7] Uncertainty in BS
43- 47 A5 --- Inst Instrument (FEROS or TRES)
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History:
From electronic version of the journal
(End) Prepared by [AAS], Tiphaine Pouvreau [CDS] 02-Aug-2019