J/A+A/690/A18 TOI-2420 b and TOI-2485 b velocity curves (Carleo+, 2024)
Mass determination of two Jupiter-sized planets orbiting slightly evolved stars:
TOI-2420 b and TOI-2485 b.
Carleo I., Barragan O., Persson M.C., Fridlund M., Lam F.K.W., Messina S.,
Gandolfi D., Smith M.S.A., Johnson C.M., Cochran W., Osborne L.M.H.,
Brahm R., Ciardi R.D., Collins K.A., Everett E.M., Giacalone S.,
Guenther W.E., Hatzes A., Hellier C., Horner J., Kabath P., Korth J.,
MacQueen P., Masseron T., Murgas F., Nowak G., Rodriguez E.J., Watkins C.N.,
Wittenmyer R., Zhou G., Ziegler C., Bieryla A., Boyd T.P., Clark A.C.,
Dressing D.C., Eastman J.D., Eberhardt J., Endl M., Espinoza N.,
Fausnaugh M., Guerrero M.N., Henning T., Hesse K., Hobson M.J., Howell B.S.,
Jordan A., Latham W.D., Lund B.M., Mireles I., Narita N., Tala Pinto M.,
Pugh T., Quinn N.S., Ricker G., Rodriguez R.D., Rojas F.I., Rose E.M.,
Rudat A., Sarkis P., Savel B.A., Schlecker M., Schwarz P.R., Seager S.,
Shporer A., Smith C.J., Stassun G.K., Stockdale C., Trifonov T.,
Vanderspek R., Winn N.J., Wright D.
<Astron. Astrophys. 690, A18 (2024)>
=2024A&A...690A..18C 2024A&A...690A..18C (SIMBAD/NED BibCode)
ADC_Keywords: Stars, double and multiple ; Exoplanets ; Radial velocities ;
Optical
Keywords: planets and satellites: detection -
planets and satellites: gaseous planets
Abstract:
Hot and warm Jupiters might have undergone the same formation and
evolution path, but the two populations exhibit different
distributions of orbital parameters, challenging our understanding on
their actual origin.
The present work, which is the results of our warm Jupiters survey
carried out with the CHIRON spectrograph within the KESPRINT
collaboration, aims to address this challenge by studying two planets
that could help bridge the gap between the two populations.
We report the confirmation and mass determination of a hot Jupiter
(orbital period shorter than 10 days), TOI-2420 b, and a warm Jupiter,
TOI-2485 b. We performed a joint analysis using a wide variety of
spectral and photometric data in order to characterize these planetary
systems.
We found that TOI-2420 b has an orbital period of Pb=5.8 days, a
mass of Mb=0.9MJ and a radius of Rb=1.3RJ, with a planetary
density of 0.477g/cm3; while TOI-2485 b has an orbital period of
Pb=11.2 days, a mass of Mb=2.4MJ and a radius of Rb=1.1RJ
with density 2.36g/cm3. With current parameters, the migration
history for TOI-2420 b and TOI-2485 b is unclear: the
high-eccentricity migration scenarios cannot be ruled out, and
TOI-2485 b's characteristics may rather support this scenario.
Description:
This paper presents the discovery of two Jupiter-sized planets.
TOI-2420 b has been observed by TESS in Sectors 3 and 30, followed-up
through LCO ground-based photometry and CHIRON TULL and
Minerva-Australis spectroscopy. We found TOI-2420 b to have an orbital
period of 5.8 days, a mass of 0.9MJ and a radius of 1.3RJ.
TOI-2485 b has been observed by TESS during Sectors 23 and 50. We
collected LCO photometry, and CHIRON, FEROS and TRES RVs data in order
to constrain the orbital properties. TOI-2485 b has an orbital period
of 11.2 days, a mass of 2.4MJ and a radius of 1.1RJ.
Radial velocity curves of TOI-2420 b and TOI-2420 b.
Objects:
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RA (2000) DE Designation(s)
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00 59 18.44 -19 46 16.19 TOI-2420 = TIC 268532343
13 40 49.04 +22 59 02.29 TOI-2485 = TIC 328934463
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
toi-2420.dat 54 136 Radial velocities acquired for TOI-2420
toi-2485.dat 54 40 Radial velocities acquired for TOI-2485
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Byte-by-byte Description of file: toi-2420.dat toi-2485.dat
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Bytes Format Units Label Explanations
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1- 18 F18.12 d JD Julian Date (JD-2450000)
21- 34 F14.10 km/s RV Radial velocity or relative radial velocity
for TRES data of TOI-2485
36- 47 F12.10 km/s e_RV Radial velocity uncertainty
49- 54 A6 --- Inst Name of the Instrument
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Acknowledgements:
Ilaria Carleo, ilariacarleo.astro(at)gmail.com
(End) Patricia Vannier [CDS] 21-Aug-2024