J/AJ/160/235 Optical photometry and RVs of TOI-481b and TOI-892b (Brahm+, 2020)
TOI-481 b and TOI-892 b: two long-period hot Jupiters from the Transiting
Exoplanet Survey Satellite.
Brahm R., Nielsen L.D., Wittenmyer R.A., Wang S., Rodriguez J.E.,
Espinoza N., Jones M.I., Jordan A., Henning T., Hobson M., Kossakowski D.,
Rojas F., Sarkis P., Schlecker M., Trifonov T., Shahaf S., Ricker G.,
Vanderspek R., Latham D.W., Seager S., Winn J.N., Jenkins J.M.,
Addison B.C., Bakos G.A., Bhatti W., Bayliss D., Berlind P., Bieryla A.,
Bouchy F., Bowler B.P., Briceno C., Brown T.M., Bryant E.M., Caldwell D.A.,
Charbonneau D., Collins K.A., Davis A.B., Esquerdo G.A., Fulton B.J.,
Guerrero N.M., Henze C.E., Hogan A., Horner J., Huang C.X., Irwin J.,
Kane S.R., Kielkopf J., Mann A.W., Mazeh T., McCormac J., McCully C.,
Mengel M.W., Mireles I., Okumura J., Plavchan P., Quinn S.N., Rabus M.,
Saesen S., Schlieder J.E., Segransan D., Shiao B., Shporer A., Siverd R.J.,
Stassun K.G., Suc V., Tan T.-G., Torres P., Tinney C.G., Udry S., Vanzi L.,
Vezie M., Vines J.I., Vuckovic M., Wright D.J., Yahalomi D.A., Zapata A.,
Zhang H., Ziegler C.
<Astron. J., 160, 235 (2020)>
=2020AJ....160..235B 2020AJ....160..235B
ADC_Keywords: Exoplanets; Stars, F-type; Stars, dwarfs; Optical; Photometry;
Spectra, optical; Radial velocities
Keywords: Exoplanet detection methods ; Transit photometry ; Radial velocity ;
Exoplanet astronomy
Abstract:
We present the discovery of two new 10 day period giant planets from
the Transiting Exoplanet Survey Satellite mission, whose masses were
precisely determined using a wide diversity of ground-based
facilities. TOI-481b and TOI-892b have similar radii
(0.99±0.01RJup and 1.07±0.02RJup, respectively), and
orbital periods (10.3311days and 10.6266days, respectively), but
significantly different masses (1.53±0.03M_Jup versus
0.95±0.07MJup, respectively). Both planets orbit metal-rich
stars ([Fe/H]=+0.26±0.05dex and [Fe/H]=+0.24±0.05 for TOI-481
and TOI-892, respectively) but at different evolutionary stages.
TOI-481 is a M*=1.14±0.02M☉, R*=1.66±0.02R☉
G-type star (Teff=5735±72K), that with an age of 6.7Gyr, is in the
turn-off point of the main sequence. TOI-892 on the other hand, is a
F-type dwarf star (Teff=6261±80K), which has a mass of
M*=1.28±0.03M☉ and a radius of
R*=1.39±0.02R☉. TOI-481b and TOI-892b join the scarcely
populated region of transiting gas giants with orbital periods longer
than 10days, which is important to constrain theories of the formation
and structure of hot Jupiters.
Description:
TOI-481 and TOI-892 were monitored by Transiting Exoplanet Survey
Satellite (TESS) during its first year of operation. TOI-481 was
observed in short-cadence (2minutes) mode in Sectors 6, 7, 9, 10, and
13, and in long-cadence (30minutes) mode in Sector 3. On the other
hand, TOI-892 was only observed in Sector 6, in long-cadence mode.
TOI-481 and TOI-892 were monitored with seven different spectrographs
with the goal of measuring radial velocity variations to confirm the
planetary nature of the transiting candidates and constrain their
orbital parameters and masses.
The Fiber-fed Extended Range Optical Spectrograph (FEROS) has a
resolving power of R=48000 and is installed on the Max Planck
Gesellschaft (MPG) 2.2 m telescope at La Silla Observatory in Chile.
The CHIRON instrument is a high-resolution (R=80000) and fiber-fed
spectrograph mounted on the 1.5m Smarts telescope at the Cerro Tololo
Inter-American Observatory (CTIO), Chile.
The Tillinghast Reflector Echelle Spectrograph (TRES) is a R=44000
fiber-fed instrument mounted on the 1.5m Tillinghast Reflector at the
Fred L. Whipple Observatory (FLWO) on Mt. Hopkins, Arizona.
CORALIE is a high-resolution (R=60000) fiber-fed spectrograph mounted
on the 1.2m Swiss Euler telescope at La Silla Observatory, Chile.
Minerva-Australis is an array of four PlaneWave CDK700 telescopes
which can be simultaneously fiber-fed to a single KiwiSpec R4-100
high-resolution (R=80000) spectrograph. TOI-481 was monitored by
Minerva-Australis using one and/or two telescopes in the array
Minerva3 and Minerva4.
Las Cumbres Observatory's Network of Robotic Echelle Spectrographs
(NRES) is a global array of echelle spectrographs mounted on 1 m
telescopes, with a resolving power of R∼53000.
File Summary:
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FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 36 2262 Long cadence TESS light curve data for TOI-481
and TOI-892
table2.dat 47 142 Radial velocity measurements for TOI-481 and TOI-892
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See also:
I/345 : Gaia DR2 (Gaia Collaboration, 2018)
VII/233 : The 2MASS Extended sources (IPAC/UMass, 2003-2006)
J/ApJ/720/1118 : i-band photometry of HAT-P-16 (Buchhave+, 2010)
J/A+A/517/L1 : Radial velocities of WASP-8b planet (Queloz+, 2010)
J/A+A/524/A25 : Radial Velocities on 6 exoplanet host stars (Triaud+, 2010)
J/ApJ/723/L223 : Radial velocities of HAT-P-11 (Winn+, 2010)
J/A+A/527/L11 : HAT-P-6 radial velocity curve (Hebrard+, 2011)
J/ApJ/757/18 : Radial velocities for 16 hot Jupiter host (Albrecht+, 2012)
J/other/Nat/486.375 : Stellar parameters of KOI stars (Buchhave+, 2012)
J/A+A/564/A125 : AGN Torus model comparison of AGN in the CDFS (Buchner+, 2014)
J/AJ/148/29 : Spectroscopy and differ. photometry of HATS-4 (Jordan+, 2014)
J/AJ/148/81 : APASS BVgri photometry of RAVE stars. I. Data (Munari+, 2014)
J/AJ/150/33 : Photometry & spectroscopy of HATS-9 and HATS-10 (Brahm+, 2015)
J/ApJ/809/77 : Transiting Exoplanet Survey Satellite (TESS) (Sullivan+,2015)
J/ApJ/831/64 : Mass-metallicity relation for giant planets (Thorngren+,2016)
J/AJ/154/188 : Radial velocities & photometry K2-114&K2-115 (Shporer+, 2017)
J/ApJ/836/77 : A library of high-S/N optical spectra FGKM stars (Yee+, 2017)
J/A+A/615/A90 : Kepler-419 radial velocities (Almenara+, 2018)
J/ApJS/239/2 : Simulated exoplanets from TESS list of targets (Barclay+,2018)
J/A+A/613/A76 : Relative radial velocities & K2 fluxes K2-132 (Jones+, 2018)
J/AJ/156/102 : The TESS Input Catalog Candidate Target List (Stassun+, 2018)
J/AJ/158/45 : TESS light curve & radial velocities for HD 1397 (Brahm+,2019)
J/AJ/158/63 : 5 new transiting hot Jupiters (Espinoza+, 2019)
J/AJ/157/245 : High-precision radial velocities for HD 221416 (Huber+, 2019)
J/A+A/625/A16 : HD 2685 TESS photometry (Jones+, 2019)
J/AJ/157/100 : Radial velocities and bisector spans for K2-287 (Jordan+,2019)
J/AJ/157/191 : Light curve & radial velocities for TOI-172 (Rodriguez+, 2019)
J/AJ/158/141 : Differential photom. & RVs HAT-P-69 & HAT-P-70 (Zhou+, 2019)
J/AJ/159/145 : RVs & opt. photometry of the host star TOI-677 (Jordan+, 2020)
J/AJ/159/19 : SOAR TESS survey. I. (Ziegler+, 2020)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 7 A7 --- ID Star identification
9- 22 F14.6 d BJD [2458382/2458491] Barycentric Julian Date
24- 30 F7.1 e/s Flux [5852/27153]? Extracted flux
32- 34 F3.1 e/s e_Flux [2.4/5.1]? The 1σ error in Flux
36- 36 I1 --- Sector [3/6] TESS sector
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 7 A7 --- ID Star identification
9- 22 F14.6 d BJD [2458543/2458923] Barycentric Julian Date
24- 31 F8.2 m/s RVel [-318/42116] Radial velocity
33- 38 F6.2 m/s e_RVel [2.35/297] The 1σ error in RVel
40- 47 A8 --- Inst Instrument Name
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History:
From electronic version of the journal
(End) Prepared by [AAS], Coralie Fix [CDS], 26-Jan-2021