J/A+A/664/A94 8 TOI RV curves and 2 TOI light curves (Psaridi+, 2022)
Three new brown dwarfs and a massive hot Jupiter revealed by TESS around
early-type stars.
Psaridi A., Bouchy F., Lendl M., Grieves N., Stassun K.G., Carmichael T.,
Gill S., Pena Rojas P.A., Gan T., Shporer A., Bieryla A.,
Christiansen J.L., Crossfield I.J.M., Galland F. Hooton M.J.,
Jenkins J.M., Jenkins J.S, Latham D.W, Lund M.B, Rodriguez J.E,
Ting E.B, Udry S., Ulmer-Moll S., Wittenmyer R.A, Zhang Y., Zhou G.,
Addison B., Cointepas M., Collins K.A., Collins K.I., Deline A.,
Dressing C.D., Evans P., Giacalone S., Heitzmann A., Mireles I.,
Mounzer D., Otegi J., Radford D.J., Rudat A., Schlieder J.E.,
Schwarz R.P., Srdoc G., Stockdale C., Suarez O., Wright D.J., Zhao Y.
<Astron. Astrophys. 664, A94 (2022)>
=2022A&A...664A..94P 2022A&A...664A..94P (SIMBAD/NED BibCode)
ADC_Keywords: Stars, double and multiple ; Stars, brown dwarf ; Exoplanets ;
Photometry ; Radial velocities ; Optical
Keywords: brown dwarfs - planetary systems - techniques: photometric -
techniques: radial velocities - stars: early-type -
binaries: eclipsing
Abstract:
The detection and characterization of exoplanets and brown dwarfs
around massive AF-type stars is essential to investigate and constrain
the impact of stellar mass on planet properties. However, such targets
are still poorly explored in radial velocity (RV) surveys because they
only feature a small number of stellar lines and those are usually
broadened and blended by stellar rotation as well as stellar jitter.
As a result, the available information about the formation and
evolution of planets and brown dwarfs around hot stars is limited.
We aim to increase the sample and precisely measure the masses and
eccentricities of giant planets and brown dwarfs transiting early-type
stars detected by the Transiting Exoplanet Survey Satellite (TESS).
We followed bright (V<12mag) stars with Teff>6200K that host
giant companions (R>7R⊕) using ground-based photometric
observations as well as high precision radial velocity measurements
from the CORALIE, CHIRON, TRES, FEROS, and MINERVA-Australis
spectrographs.
In the context of the search for exoplanets and brown dwarfs around
early-type stars, we present the discovery of three brown dwarf
companions, TOI-629b, TOI-1982b, and TOI-2543b, and one massive
planet, TOI-1107b. From the joint analysis of TESS and ground-based
photometry in combination with high precision radial velocity
measurements, we find the brown dwarfs have masses between 66 and
68MJup, periods between 7.54 and 17.17 days, and radii between 0.95
and 1.11RJup. The hot Jupiter TOI-1107b has an orbital period of
4.08 days, a radius of 1.30RJup, and a mass of 3.35MJup. As a
by-product of this program, we identified four low-mass eclipsing
components (TOI-288b, TOI-446b, TOI-478b, and TOI-764b).
Both TOI-1107b and TOI-1982b present an anomalously inflated radius
with respect to the age of these systems. TOI-629 is among the hottest
stars with a known transiting brown dwarf. TOI-629b and TOI-1982b are
among the most eccentric brown dwarfs. The massive planet and the
three brown dwarfs add to the growing population of well-characterized
giant planets and brown dwarfs transiting AF-type stars and they
reduce the apparent paucity.
Description:
Ground-based photometric fluxes for the observation of TOI-1107 and
TOI-1982 with El Sauce, ASTEP, Brierfield, Hazelwood and LCOGT. The
first column corresponds to the time of the observation in BJD_TDB.
The second and third columns correspond respectively to the flux and
flux_error on the raw light curves. The fourth column corresponds to
the name of the instrument. The fifth column corresponds to the name
of the target.
We obtained radial velocity measurements for TOI-1107, TOI-629,
TOI-1982 and TOI-2543 with different spectrographs, CORALIE, CHIRON,
TRES, FEROS, and MINERVA-Australis, in order to identify the nature of
the candidate, determine its mass and measure its orbital parameters.
We obtained radial velocity measurements as a by-product of this RV
follow-up and identified four low mass, single-lined spectral
eclipsing binaries, TOI-288, TOI-446, TOI-478 and TOI-764.
Objects:
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RA (2000) DE Designation(s)
-----------------------------------------------------
10 22 25.82 -82 13 07.97 TOI-1107 = TIC 394561119
06 23 18.69 +00 53 00.11 TOI-629 = TIC 293853437
13 50 20.36 -23 23 00.16 TOI-1982 = TIC 437329044
09 06 23.26 +03 34 03.61 TOI-2543 = TIC 270604417
22 41 13.85 -28 01 57.57 TOI-288 = TIC 47316976
05 00 41.18 -35 12 09.63 TOI-446 = TIC 1449640
06 40 38.13 -27 34 16.54 TOI-478 = TIC 172464366
11 37 12.68 -38 18 25.89 TOI-764 = TIC 181159386
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File Summary:
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FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
stars.dat 65 8 List of studied stars
lcs1.dat 48 1617 Ground based photometric fluxes for TOI-1107
from ASTEP, Brierfield and LCOGT
lcs2.dat 48 870 Ground based photometric fluxes for TOI-1982
from El Sauce, Hazelwood and LCOGT
rvs1.dat 49 156 Radial velocity time series of TOI-1107, TOI-629,
TOI-1982 and TOI-2543 from
CORALIE, MINERVA, TRES, FEROS and CHIRON
rvs2.dat 48 57 Radial velocity time series of TOI-288, TOI-446,
TOI-478 and TOI-764 from CORALIE
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See also:
IV/38 : TESS Input Catalog - v8.0 (TIC-8) (Stassun+, 2019)
Byte-by-byte Description of file: stars.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 8 A8 --- Name Star name (TOI-NNNN)
10- 11 I2 h RAh Right ascension (J2000)
13- 14 I2 min RAm Right ascension (J2000)
16- 20 F5.2 s RAs Right ascension (J2000)
22 A1 --- DE- Declination sign (J2000)
23- 24 I2 deg DEd Declination (J2000)
26- 27 I2 arcmin DEm Declination (J2000)
29- 33 F5.2 arcsec DEs Declination (J2000)
35- 47 A13 --- OName Other name (TIC NNNNNNNNN)
49- 56 A8 --- FileName1 Name of file with photometric data
58- 65 A8 --- FileName2 Name of file with radial velocity data
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Byte-by-byte Description of file: lcs1.dat lcs2.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 13 F13.5 d BJD Time of observation in BJD_TDB
15- 21 F7.5 --- Flux Normalized raw flux
23- 29 F7.5 --- e_Flux Error on Flux
31- 39 A9 --- Inst Instrument used
41- 48 A8 --- Target Name of the target
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Byte-by-byte Description of file: rvs1.dat rvs2.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 14 F14.6 d BJD Time of observation in BJD_TDB
16- 24 F9.5 km/s RV Radial velocity
26- 32 F7.5 km/s e_RV Uncertainty in RV
34- 40 A7 --- Inst Instrument used
42- 49 A8 --- Target Name of the target
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Acknowledgements:
Angelica Psaridi, angeliki.psaridi(at)unige.ch
(End) Patricia Vannier [CDS] 13-May-2022