J/AJ/159/145 RVs and opt. photometry of the host star TOI-677 (Jordan+, 2020)
TOI-677b: a warm Jupiter (P=11.2days) on an eccentric orbit transiting a late
F-type star.
Jordan A., Brahm R., Espinoza N., Henning T., Jones M.I., Kossakowski D.,
Sarkis P., Trifonov T., Rojas F., Torres P., Drass H., Nandakumar S.,
Barbieri M., Davis A., Wang S., Bayliss D., Bouma L., Dragomir D.,
Eastman J.D., Daylan T., Guerrero N., Barclay T., Ting E.B., Henze C.E.,
Ricker G., Vanderspek R., Latham D.W., Seager S., Winn J., Jenkins J.M.,
Wittenmyer R.A., Bowler B.P., Crossfield I., Horner J., Kane S.R.,
Kielkopf J.F., Morton T.D., Plavchan P., Tinney C.G., Addison B.,
Mengel M.W., Okumura J., Shahaf S., Mazeh T., Rabus M., Shporer A.,
Ziegler C., Mann A.W., Hart R.
<Astron. J., 159, 145 (2020)>
=2020AJ....159..145J 2020AJ....159..145J
ADC_Keywords: Stars, F-type; Exoplanets; Spectra, optical; Photometry, RI;
Radial velocities
Keywords: Exoplanets ; Extrasolar gas giants ; Exoplanet astronomy ;
Transit photometry ; Radial velocity ; Planet hosting stars
Abstract:
We report the discovery of TOI-677b, first identified as a candidate
in light curves obtained within Sectors 9 and 10 of the Transiting
Exoplanet Survey Satellite (TESS) mission and confirmed with radial
velocities. TOI-677b has a mass of Mp=1.236-0.067+0.069MJ, a
radius of RP=1.170±0.03RJ, and orbits its bright host star
(V=9.8mag) with an orbital period of 11.23660±0.00011d, on an
eccentric orbit with e=0.435±0.024. The host star has a mass of
M*=1.181±0.058M☉, a radius of
R*=1.28-0.03+0.03R☉, an age of 2.92-0.73+0.80Gyr and
solar metallicity, properties consistent with a main-sequence late-F
star with Teff=6295±77K. We find evidence in the radial velocity
measurements of a secondary long-term signal, which could be due to an
outer companion. The TOI-677b system is a well-suited target for
Rossiter-Mclaughlin observations that can constrain migration
mechanisms of close-in giant planets.
Description:
Between 2019 March 1 and 2019 April 22, the Transiting Exoplanet
Survey Satellite (TESS) mission observed TOI-677 during the monitoring
of Sectors 9 and 10, using camera 3 and CCDs 1 and 2, respectively.
TOI-677 was observed on the night of UTC 2019-05-09 with the
University of Louisville's Shared Skies MKO-CDK700 (SSMKO) 0.7m
telescope at Mt. Kent Observatory of the University of Southern
Queensland, Australia for ground-based photometry. Images with an
exposure time of 64s were taken through a Sloan i' filter.
We followed up TOI-677 with several spectrographs in order to confirm
the TESS transiting planet candidate and to measure its mass:
(1) TOI-677 was monitored with The Fiber-fed Extended Range Optical
Spectrograph (FEROS; R∼48000) mounted at the MPG 2.2m telescope at La
Silla Observatory between 2019 May and July, where 26 spectra were
obtained.
(2) We monitored TOI-677 with the Coralie spectrograph (R∼60000) mounted
on the Swiss-Euler 1.2m telescope in six different epochs.
(3) We collected a total of 11 spectra of TOI-677 using the CHIRON
high-resolution spectrograph (R∼80000) between 2019 May 17 and June 19.
CHIRON is mounted on the Small and Moderate Aperture Research
Telescope System (SMARTS) 1.5m telescope at the Cerro Tololo
Inter-American observatory in Chile.
(4) Las Cumbres Observatory's Network of Robotic Echelle Spectrographs
(NRES) is a global array of echelle spectrographs mounted on 1m
telescopes, with a resolving power of ∼53000. TOI-677 was observed at
12 epochs with the NRES node located at the Cerro Tololo
Inter-American Observatory.
(5) We obtained 17 observations on nine separate nights with the
Minerva-Australis telescope array at Mount Kent Observatory in
Queensland, Australia. All of the telescopes in the Minerva-Australis
array simultaneously feed a single Kiwispec R4-100 high-resolution
(R∼80000) spectrograph with a wavelength coverage from 500 to 630nm
over 26 echelle orders.
Objects:
---------------------------------------------------------------------
RA (2000) DE Designation(s) Period
---------------------------------------------------------------------
15 32 17.85 -22 21 29.8 TOI-677 = HD 297549 (P=11.236)
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File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table2.dat 32 2961 Relative photometry for TOI-677
table4.dat 43 87 Radial velocities and bisector spans for TOI-677
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See also:
I/345 : Gaia DR2 (Gaia Collaboration, 2018)
IV/38 : TESS Input Catalog - v8.0 (TIC-8) (Stassun+, 2019)
J/ApJ/724/866 : Follow-up observations of HAT-P-15 (Kovacs+, 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/757/18 : Radial velocities of 16 hot Jupiter host stars (Albrecht+,2012)
J/ApJS/200/15 : HARPS-TERRA project. I. (Anglada-Escude+, 2012)
J/ApJ/772/80 : Radial velocities of HAT-P-17 (Fulton+, 2013)
J/AJ/148/29 : Spectroscopy & differential photometry of HATS-4 (Jordan+,2014)
J/A+A/568/A81 : WASP-117b photometry and radial velocities (Lendl+, 2014)
J/AJ/150/33 : Photometry and spectroscopy of HATS-9 and HATS-10 (Brahm+,2015)
J/ApJ/809/77 : Transiting Exoplanet Survey Satellite (TESS) (Sullivan+, 2015)
J/AJ/151/89 : Spectroscopy and photometry of HATS-17 (Brahm+, 2016)
J/A+A/606/A73 : MASCARA-1 b (HD201585) light curves and spectra (Talens+, 2017)
J/ApJS/239/2 : Simulated exoplanets from TESS list of targets (Barclay+, 2018)
J/AJ/158/45 : TESS light curve & radial velocities for HD 1397 (Brahm+, 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/157/191 : Light curve & radial velocities for TOI-172 (Rodriguez+, 2019)
J/AJ/159/19 : SOAR TESS survey. I. (Ziegler+, 2020)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 12 F12.6 d BJD [58547/58615] Barycentric Julian Date of
observation; BJD-2400000
14- 20 F7.3 --- Flux [-13.3/3.56] Relative flux in parts per thousand
22- 26 F5.3 --- e_Flux [0.69/0.89] Uncertainty in Flux
28- 32 A5 --- Inst Instrument used ("TESS" or "SSMKO") (1)
--------------------------------------------------------------------------------
Note (1): Instruments as follows:
SSMKO = Shared Skies Telescope at Mt. Kent Observatory (92 occurrences)
TESS = Transiting Exoplanet Survey Satellite (2869 occurrences)
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Byte-by-byte Description of file: table4.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 12 F12.6 d BJD [58615/58677] Barycentric Julian Date of
observation; BJD-2400000
14- 20 F7.2 m/s RV [-138/138] Radial Velocity (1)
22- 25 F4.1 m/s e_RV [4/53] Uncertainty in RV
27- 29 I3 m/s BIS [-77/104]? Bisector span
31- 32 I2 m/s e_BIS [8/38]? Uncertainty in BIS
34- 43 A10 --- Inst Instrument used (2)
--------------------------------------------------------------------------------
Note (1): For convenience, the mean has been subtracted from the originally
measured radial velocities for each instrument, and the
instrument-dependent radial velocity zeropoints reported in Table 2
are with respect to these mean-subtracted values.
The mean values m (in m/s) which should be added to recover the
original measurements are: mFEROS=37656.23, mCoralie=37665.27,
mCHIRON=20.1, mNRES=38228.49 and mMinerva=37844.01
Note (2): Instruments as follows:
CHIRON = CTIO 1.5m/CHIRON high-resolution spectrograph (9 occurrences)
Coralie = Euler 1.3m/Coralie spectrograph (6 occurrences)
FEROS = MPG 2.2m/FEROS (26 occurrences)
Minerva_T3 = Mount Kent Observatory Minerva-Australis array, telescope 3
(16 occurrences)
Minerva_T4 = MKO Minerva-Australis array, telescope 4 (13 occurrences)
Minerva_T5 = MKO Minerva-Australis array, telescope 5 (5 occurrences)
NRES = LCOGT 1m/Network of Robotic Echelle Spectrographs (12 occurrences)
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History:
From electronic version of the journal
(End) Prepared by [AAS], Coralie Fix [CDS], 06-May-2020