J/A+A/669/A109 TOI-969 light and RV curves (Lillo-Box+, 2023)
TOI-969: a late-K dwarf with a hot mini-Neptune in the desert and
an eccentric cold Jupiter.
Lillo-Box J., Gandolfi G., Armstrong D.J., Collins K.A., Nielsen L.D.,
Luque R., Korth J., Sousa S.G., Quinn S.N., Acuna L., Howell S.B.,
Morello G., Hellier C., Giacalone S., Hoyer S., Stassun K., Palle E.,
Aguichine A., Mousis O., Adibekyan V., Azevedo Silva T., Barrado D.,
Deleuil M., Eastman J.D., Fukui A., Hawthorn F., Irwin J.M., Jenkins J.M.,
Latham D.W., Muresan A., Narita N., Persson C.M., Santerne A., Santos N.C.,
Savel A.B., Osborn H.P., Teske J., Wheatley P.J., Winn J.N., Barros S.C.C.,
Butler R.P., Caldwell D.A., Charbonneau D., Cloutier R., Crane J.D.,
Demangeon O.D.S., Diaz R.F., Dumusque X., Esposito M., Falk B., Gill H.,
Hojjatpanah S., Kreidberg L., Mireles I., Osborn A., Ricker G.R.,
Rodriguez J.E., Schwarz R.P., Seager S., Serrano Bell J., Shectman S.A.,
Shporer A., Vezie M., Wang S.X., Zhou G.
<Astron. Astrophys. 669, A109 (2023)>
=2023A&A...669A.109L 2023A&A...669A.109L (SIMBAD/NED BibCode)
ADC_Keywords: Stars, double and multiple ; Exoplanets ; Radial velocities ;
Photometry ; Optical
Keywords: planets and satellites: detection -
planets and satellites: fundamental parameters -
planets and satellites: composition -
techniques: radial velocities - techniques: photometric -
stars: individual: TOI-969
Abstract:
The current architecture of a given multi-planetary system is a key
fingerprint of its past formation and dynamical evolution history.
Long-term follow-up observations are key to complete their picture.
In this paper we focus on the confirmation and characterization of the
components of the TOI-969 planetary system, where TESS detected a
Neptune-size planet candidate in a very close-in orbit around a late
K-dwarf star.
We use a set of precise radial velocity observations from HARPS, PFS
and CORALIE instruments covering more than two years in combination
with the TESS photometric light curve and other ground-based follow-up
observations to confirm and characterize the components of this
planetary system.
We find that TOI-969 b is a transiting close-in (Pb∼1.82days)
mini-Neptune planet (mb=9.1+1.11.0M⊕,
Rb=2.765+0.0880.097R⊕), thus placing it on the {lower
boundary} of the hot-Neptune desert (Teq,b=941±31K). The analysis
of its internal structure shows that TOI-969 b is a volatile-rich
planet, suggesting it underwent an inward migration. The radial
velocity model also favors the presence of a second massive body in
the system, TOI-969 c, with a long period of Pc=1700+290280days
and a minimum mass of mcsinic=11.3+1.10.9MJup, and with a
highly-eccentric orbit of ec=0.628+0.0430.036.
The TOI-969 planetary system is one of the few around K-dwarfs known
to have this extended configuration going from a very close-in planet
to a wide-separation gaseous giant. TOI-969 b has a transmission
spectroscopy metric of 93, and it orbits a moderately bright
(G=11.3mag) star, thus becoming an excellent target for atmospheric
studies. The architecture of this planetary system can also provide
valuable information about migration and formation of planetary
systems.
Description:
Detection and characterization of the planet TOI-969b and its external
long-period planetary-mass companion with radial velocity,
high-spatial resolution imaging and high-precision photometry.
Objects:
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RA (2000) DE Designation(s)
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07 40 32.83 +02 05 56.1 TOI-969 = TIC 280437559
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tess.dat 59 4402 TESS light curve time series (table A1)
gb.dat 71 5864 Ground-based light curves of TOI-969 from the
LCOGT and MEarth facilities (table A2)
wasp.dat 34 11114 Photometric time series from WASP (table A3)
rv.dat 122 94 RV data set for TOI-969 (table A4)
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Byte-by-byte Description of file: tess.dat
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Bytes Format Units Label Explanations
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1- 16 F16.8 d BJD Barycentric Julian date
18- 25 F8.6 --- PDCSAP TESS PDCSAP relative flux
27- 34 F8.6 --- e_PDCSAP TESS PDCSAP relative flux uncertainty
36- 43 F8.6 --- Fluxdet Detrended TESS relative flux from joint MCMC fit
45- 52 F8.6 --- e_Fluxdet Detrended TESS relative flux uncertainty from
joint MCMC fit
54- 59 A6 --- Inst Instrument (TESS07 or TESS34)
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Byte-by-byte Description of file: gb.dat
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Bytes Format Units Label Explanations
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1- 16 F16.8 d BJD Barycentric Julian date
18- 25 F8.6 --- Flux Raw relative flux
27- 34 F8.6 --- e_Flux Raw relative flux uncertainty
36- 43 F8.6 --- Fluxdet Detrended relative flux from joint MCMC fit
45- 52 F8.6 --- e_Fluxdet Detrended relative flux unc from joint MCMC fit
54- 61 F8.6 --- Airmass Airmass
63- 71 A9 --- Inst Instrument (1)
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Note (1): LCOHAL_gp, LCOHAL_ip, LCOHAL_rp, LCOHAL_zs or MEarth
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Byte-by-byte Description of file: wasp.dat
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Bytes Format Units Label Explanations
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1- 16 F16.8 d BJD Barycentric Julian date
18- 25 F8.6 --- Flux Raw relative flux
27- 34 F8.6 --- e_Flux Raw relative flux uncertainty
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Byte-by-byte Description of file: rv.dat
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Bytes Format Units Label Explanations
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1- 14 F14.6 d BJD Barycentric Julian date
16- 23 F8.5 km/s RV Radial velocity
25- 31 F7.5 km/s e_RV Radial velocity uncertainty
33- 40 F8.5 km/s FWHM ?=- FWHM of the CCF
42- 48 F7.5 km/s e_FWHM ?=- FWHM uncertainty of the CCF
50- 56 F7.5 --- BIS ?=- BIS-SPAN of the CCF
58- 64 F7.5 --- e_BIS ?=- BIS-SPAN uncertainty of the CCF
66- 73 F8.5 --- Cont ?=- CONTRAST of the CCF
75- 81 F7.5 --- e_Cont ?=- CONTRAST uncertainty of the CCF
83- 89 F7.5 --- Sindex ?=- S-index with Mount-Wilson calibration
91- 97 F7.5 --- e_Sindex ?=- S-index uncertainty
99-106 F8.5 [-] logRHK ?=- logRHK index
108-114 F7.5 [-] e_logRHK ?=- logRHK index uncertainty
116-122 A7 --- Inst Instrument (CORALIE, HARPS or PFS)
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Acknowledgements:
Jorge Lillo-Box, Jorge.Lillo(at)cab.inta-csic.es
(End) Lillo-Box Jorge [CAB], Patricia Vannier [CDS] 25-Nov-2022