J/A+A/675/A39 TOI-615, TOI-622, TOI-2641 RVs + ground phot. (Psaridi+, 2023)
Three Saturn-mass planets transiting F-type stars revealed with TESS and HARPS.
TOI-615b, TOI-622b, and TOI-2641b.
Psaridi A., Bouchy F., Lendl M., Akinsanmi B., Stassun K.G., Smalley B.,
Armstrong D.J., Howard S., Ulmer-Moll S., Grieves N., Barkaoui K.,
Rodriguez J.E., Bryant E.M., Suarez O., Guillot T., Evans P., Attia O.,
Wittenmyer R.A., Yee S.W., Collins K.A., Zhou G., Galland F., Parc L.,
Udry S., Figueira P., Ziegler C., Mordasini C., Winn J.N., Seager S.,
Jenkins J.M., Twicken J.D., Brahm J.N., Jones M.I., Abe L., Addison B.,
Briceno C., Briegal J.T., Collins K.I., Daylan T., Eigmueller P.,
Furesz G., Guerrero N.M., Hagelberg J., Heitzmann A., Hounsell R.,
Huang C.X., Krenn A., Law N.M., Mann A.W., McCormac J., Mekarnia D.,
Mounzer D., Nielsen L.D., Osborn A., Reinarz Y., Sefako R.R., Steiner M.,
Strom P.A., Triaud A.H.M.J., Vanderspek R., Vines J.I., Watson C.A.,
Wright D.J., Zapata A.
<Astron. Astrophys. 675, A39 (2023)>
=2023A&A...675A..39P 2023A&A...675A..39P (SIMBAD/NED BibCode)
ADC_Keywords: Stars, double and multiple ; Exoplanets ; Photometry ; Optical ;
Radial velocities
Keywords: planets and satellites: individual: TOI-615b -
planets and satellites: individual: TOI-622b -
planets and satellites: individual: TOI-2641b -
techniques: photometric - techniques: radial velocities
Abstract:
While the sample of confirmed exoplanets continues to grow, the
population of transiting exoplanets around early-type stars is still
limited. These planets allow us to investigate the planet properties
and formation pathways over a wide range of stellar masses and study
the impact of high irradiation on hot Jupiters orbiting such stars. We
report the discovery of TOI-615b, TOI-622b, and TOI-2641b, three
Saturn-mass planets transiting main sequence, F-type stars. The
planets were identified by the Transiting Exoplanet Survey Satellite
(TESS) and confirmed with complementary ground-based and radial
velocity observations. TOI-615b is a highly irradiated
(∼1277F⊕) and bloated Saturn-mass planet
(1.69+0.05-0.06RJup and 0.43+0.09-0.08MJup) in a 4.66 day
orbit transiting a 6850K star. TOI-622b has a radius of
0.82+0.03-0.03RJup and a mass of 0.30+0.07-0.08MJup in a
6.40 day orbit. Despite its high insolation flux (∼600F⊕),
TOI-622b does not show any evidence of radius inflation. TOI-2641b is
a 0.39+0.02-0.04MJup planet in a 4.88 day orbit with a grazing
transit (b=1.04+0.05-0.06) that results in a poorly constrained
radius of 1.61+0.46-0.64RJup. Additionally, TOI-615b is
considered attractive for atmospheric studies via transmission
spectroscopy with ground-based spectrographs and JWST. Future
atmospheric and spin-orbit alignment observations are essential since
they can provide information on the atmospheric composition, formation
and migration of exoplanets across various stellar types.
Description:
Ground-based photometric fluxes for the observation of TOI-615,
TOI-622 and TOI-2641 with El Sauce, ASTEP, ECAM, LCO and NGTS.
We obtained radial velocity measurements for TOI-615, TOI-622 and
TOI-2641 with different spectrographs, HARPS, CORALIE and CHIRON,
MINERVAAustralis, FIDEOS, and NRES, in order to identify the nature of
the candidates, determine its mass and measure its orbital parameters.
Objects:
-----------------------------------------
RA (2000) DE Designation(s)
-----------------------------------------
08 53 38.11 -40 32 37.72 TOI-615
08 21 13.22 -46 29 03.20 TOI-622
11 24 31.34 -42 43 55.55 TOI-2641
-----------------------------------------
File Summary:
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FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
stars.dat 33 3 Studied stars
lcs.dat 109 3919 Ground-based photometry for TOI-615, TOI-622
and TOI-2641
rvs.dat 47 217 Radial velocities for TOI-615, TOI-622
and TOI-2641
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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
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 8 A8 --- TOI Target name
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)
--------------------------------------------------------------------------------
Byte-by-byte Description of file: lcs.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 8 A8 --- TOI Target name
10- 17 A8 --- Inst Instrument
19- 32 F14.8 d BJD Barycentric Julian date (BJD-2400000)
34- 43 F10.8 --- Flux Relative flux
45- 53 F9.7 --- e_Flux Relative flux uncertainty
55- 63 F9.4 --- xshift X-shifts
65- 73 F9.4 --- yshift Y-shifts
75- 82 F8.4 --- AM Airmass
84- 92 F9.4 --- FWHM FWHM
94-103 F10.4 --- sky Background sky
105-109 F5.2 s ExpTime Exposure time
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Byte-by-byte Description of file: rvs.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 8 A8 --- TOI Target name
10- 16 A7 --- Inst Instrument
18- 30 F13.7 d BJD Barycentric Julian date (BJD-2400000)
32- 40 F9.2 m/s RV Radial velocity
42- 47 F6.2 m/s e_RV Radial velocity uncertainty
--------------------------------------------------------------------------------
Acknowledgements:
Angelica Psaridi, angeliki.psaridi(at)unige.ch
(End) Patricia Vannier [CDS] 04-May-2023