J/MNRAS/511/1043 Sub-Neptunes transiting TOI-1064 (Wilson+, 2022)
A pair of sub-Neptunes transiting the bright K-dwarf TOI-1064 characterized
with CHEOPS.
Wilson T.G., Goffo E., Alibert Y., Gandolfi D., Bonfanti A., Persson C.M.,
Collier Cameron A., Fridlund M., Fossati L., Korth J., Benz W., Deline A.,
Floren H.-G., Guterman P., Adibekyan V., Hooton M.J., Hoyer S., Leleu A.,
Mustill A.J., Salmon S., Sousa S.G., Suarez O., Abe L., Agabi A.,
Alonso R., Anglada G., Asquier J., Barczy T., Barrado Navascues D.,
Barros S.C.C., Baumjohann W., Beck M., Beck T., Billot N., Bonfils X.,
Brandeker A., Broeg C., Bryant E.M., Burleigh M.R., Buttu M., Cabrera J.,
Charnoz S., Ciardi D.R., Cloutier R., Cochran W.D., Collins K.A.,
Colon K.D., Crouzet N., Csizmadia S., Davies M.B., Deleuil M., Delrez L.,
Demangeon O., Demory B.-O., Dragomir D., Dransfield G., Ehrenreich D.,
Erikson A., Fortier A., Gan T., Gill S., Gillon M., Gnilka C.L.,
Grieves N., Grziwa S., Gudel M., Guillot T., Haldemann J., Heng K.,
Horne K., Howell S.B., Isaak K.G., Jenkins J.M., Jensen E.L.N., Kiss L.,
Lacedelli G., Lam K., Laskar J., Latham D.W., Lecavelier des Etangs A.,
Lendl M., Lester K.V., Levine A.M., Livingston J., Lovis C., Luque R.,
Magrin D., Marie-Sainte W., Maxted P.F.L., Mayo A.W., McLean B., Mecina M.,
Mekarnia D., Nascimbeni V., Nielsen L.D., Olofsson G., Osborn H.P.,
Osborne H.L.M., Ottensamer R., Pagano I., Palle E., Peter G., Piotto G.,
Pollacco D., Queloz D., Ragazzoni R., Rando N., Rauer H., Redfield S.,
Ribas I., Ricker G.R., Rieder M., Santos N.C., Scandariato G.,
Schmider F.-X., Schwarz R.P., Scott N.J., Seager S., Segransan D.,
Serrano L.M., Simon A.E., Smith A.M.S., Steller M., Stockdale C., Szabo G.,
Thomas N., Ting E.B., Triaud A.H.M.J., Udry S., Van Eylen V.,
Van Grootel V., Vanderspek R.K., Viotto V., Walton N., Winn J.N.
<Mon. Not. R. Astron. Soc., 511, 1043-1071 (2022)>
=2022MNRAS.511.1043W 2022MNRAS.511.1043W (SIMBAD/NED BibCode)
ADC_Keywords: Stars, double and multiple ; Exoplanets ; Radial velocities ;
Optical
Keywords: techniques: photometric - techniques: radial velocities -
planets and satellites: composition -
planets and satellites: detection -
planets and satellites: interiors -
stars: individual: TOI-1064
(TIC 79748331; Gaia EDR3 6683371847364921088)
Abstract:
We report the discovery and characterization of a pair of sub-Neptunes
transiting the bright K-dwarf TOI-1064 (TIC 79748331), initially
detected in the Transiting Exoplanet Survey Satellite (TESS)
photometry. To characterize the system, we performed and retrieved the
CHaracterising ExOPlanets Satellite (CHEOPS), TESS, and ground-based
photometry, the High Accuracy Radial velocity Planet Searcher (HARPS)
high-resolution spectroscopy, and Gemini speckle imaging. We
characterize the host star and determine Teff,*=4734±67K,
R*=0.726±0.007R☉, and M*=0.748±0.032M☉. We present
a novel detrending method based on point spread function shape-change
modelling and demonstrate its suitability to correct flux variations
in CHEOPS data. We confirm the planetary nature of both bodies and
find that TOI-1064 b has an orbital period of Pb=6.44387±0.00003d, a
radius of Rb=2.59±0.04R⊕, and a mass of
Mb=13.5+1.7-1.8M⊕, whilst TOI-1064 c has an orbital
period of Pc=12.22657+0.00005-0.00004d, a radius of
Rc=2.65±0.04R⊕, and a 3σ upper mass limit of
8.5M⊕. From the high-precision photometry we obtain radius
uncertainties of ∼1.6 per cent, allowing us to conduct internal
structure and atmospheric escape modelling. TOI-1064 b is one of the
densest, well-characterized sub-Neptunes, with a tenuous atmosphere
that can be explained by the loss of a primordial envelope following
migration through the protoplanetary disc. It is likely that
TOI-1064 c has an extended atmosphere due to the tentative low
density, however further radial velocities are needed to confirm this
scenario and the similar radii, different masses nature of this
system. The high-precision data and modelling of TOI-1064 b are
important for planets in this region of mass-radius space, and it
allow us to identify a trend in bulk density-stellar metallicity for
massive sub-Neptunes that may hint at the formation of this population
of planets.
Description:
Raw and detrended data from CHEOPS, TESS, LCOGT, NGTS, ASTEP, ASAS-SN,
WASP, HARPS, and Gemini-South; PSF and CCF SCALPELS data from CHEOPS
and HARPS analyses.
Objects:
-----------------------------------------------------
RA (2000) DE Designation(s)
-----------------------------------------------------
19 44 00.95 -47 33 41.75 TOI-1064 = TIC 79748331
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File Summary:
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FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
cheoraw1.dat 187 440 CHEOPS visit 1 raw data
cheoraw2.dat 187 278 CHEOPS visit 2 raw data
cheoraw3.dat 187 282 CHEOPS visit 3 raw data
cheoraw4.dat 187 254 CHEOPS visit 4 raw data
cheoraw5.dat 187 231 CHEOPS visit 5 raw data
cheoraw6.dat 187 762 CHEOPS visit 6 raw data
cheopsf1.dat 621 440 CHEOPS visit 1 PSF SCALPELS data
cheopsf2.dat 469 278 CHEOPS visit 2 PSF SCALPELS data
cheopsf3.dat 599 282 CHEOPS visit 3 PSF SCALPELS data
cheopsf4.dat 318 254 CHEOPS visit 4 PSF SCALPELS data
cheopsf5.dat 665 231 CHEOPS visit 5 PSF SCALPELS data
cheopsf6.dat 1001 762 CHEOPS visit 6 PSF SCALPELS data
cheodet1.dat 55 440 CHEOPS visit 1 detrended data
cheodet2.dat 55 278 CHEOPS visit 2 detrended data
cheodet3.dat 55 282 CHEOPS visit 3 detrended data
cheodet4.dat 55 254 CHEOPS visit 4 detrended data
cheodet5.dat 55 231 CHEOPS visit 5 detrended data
cheodet6.dat 55 762 CHEOPS visit 6 detrended data
traws13.dat 59 17939 TESS sector 13 raw data
traws27.dat 59 71703 TESS sector 27 raw data
tdets13.dat 59 17939 TESS sector 13 detrended data
tdets27.dat 59 71703 TESS sector 27 detrended data
harpsraw.dat 98 26 HARPS raw data
harpsccf.dat 107 26 HARPS CCF SCALPELS data
ctiozs.dat 55 255 LCOGT CTIO Zs data
saaob.dat 46 122 LCOGT SAAO B data
saaozs1.dat 55 453 LCOGT SAAO Zs visit 1 data
saaozs2.dat 55 368 LCOGT SAAO Zs visit 2 data
saaozs3.dat 55 343 LCOGT SAAO Zs visit 4 data
ngtsraw.dat 75 1811 NGTS raw data
ngtsdet.dat 48 1811 NGTS detrended data
astep1.dat 46 297 ASTEP visit 1 data
astep2.dat 46 421 ASTEP visit 2 data
astep3.dat 46 267 ASTEP visit 3 data
astep4.dat 46 178 ASTEP visit 3 data
asassn.dat 58 401 ASAS-SN data
wasp.dat 59 66832 WASP data
gems562.dat 19 119 Gemini-South 562 data
gems832.dat 19 120 Gemini-South 832 data
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Byte-by-byte Description of file: cheoraw*.dat
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Bytes Format Units Label Explanations
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1- 18 F18.10 d BJD Barycentric Julian date
20- 37 F18.16 --- Flux Normalised flux
39- 60 F22.20 --- e_Flux Normalised flux error
62- 75 E14.7 pix Xoffset X centroid position offset
77- 88 F12.9 pix Yoffset Y centroid position offset
90-108 F19.15 --- Roll Roll angle
110-129 F20.18 ct Contam Contamination
131-150 F20.18 ct Bckg Background
152-173 E22.16 ct Smear Smear
175-187 F13.10 --- DeltaT Delta temperature
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Byte-by-byte Description of file: cheopsf*.dat
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Bytes Format Units Label Explanations
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1- 16 F16.8 d BJD Barycentric Julian date
18- 34 F17.15 --- Flux Normalised flux
36- 52 F17.15 --- e_Flux Normalised flux error
54- 70 F17.15 --- Fluxd Normalised detrended flux
72- 88 F17.15 --- e_Fluxd Normalised detrended flux error
90- 106 F17.15 --- Fluxpsfmodel PSF SCALPELS PSF shape change model
108- 128 E21.13 --- Theta0 1st PSF SCALPELS principal component
130- 150 E21.12 --- Theta1 2nd PSF SCALPELS principal component
151- 168 F18.15 --- Theta2 3rd PSF SCALPELS principal component
170- 190 E21.13 --- Theta3 4th PSF SCALPELS principal component
192- 209 F18.15 --- Theta4 5th PSF SCALPELS principal component
211- 231 E21.13 --- Theta5 6th PSF SCALPELS principal component
233- 253 E21.13 --- Theta6 7th PSF SCALPELS principal component
255- 274 E20.12 --- Theta7 8th PSF SCALPELS principal component
276- 296 E21.13 --- Theta8 9th PSF SCALPELS principal component
298- 318 E21.13 --- Theta9 10th PSF SCALPELS principal component
320- 339 E20.12 --- Theta10 ? 11th PSF SCALPELS principal component
341- 361 E21.12 --- Theta11 ? 12th PSF SCALPELS principal component
362- 382 E21.13 --- Theta12 ? 13th PSF SCALPELS principal component
384- 404 E21.13 --- Theta13 ? 14th PSF SCALPELS principal component
406- 426 E21.13 --- Theta14 ? 15th PSF SCALPELS principal component
428- 448 E21.13 --- Theta15 ? 16th PSF SCALPELS principal component
449- 469 E21.13 --- Theta16 ? 17th PSF SCALPELS principal component
471- 491 E21.13 --- Theta17 ? 18th PSF SCALPELS principal component
493- 512 E20.12 --- Theta18 ? 19th PSF SCALPELS principal component
514- 534 E21.13 --- Theta19 ? 20th PSF SCALPELS principal component
536- 556 E21.13 --- Theta20 ? 21st PSF SCALPELS principal component
558- 578 E21.13 --- Theta21 ? 22nd PSF SCALPELS principal component
580- 599 E20.12 --- Theta22 ? 23rd PSF SCALPELS principal component
601- 621 E21.13 --- Theta23 ? 24th PSF SCALPELS principal component
623- 643 E21.13 --- Theta24 ? 25th PSF SCALPELS principal component
645- 665 E21.13 --- Theta25 ? 26th PSF SCALPELS principal component
667- 686 E20.12 --- Theta26 ? 27th PSF SCALPELS principal component
688- 707 E20.12 --- Theta27 ? 28th PSF SCALPELS principal component
709- 729 E21.13 --- Theta28 ? 29th PSF SCALPELS principal component
731- 751 E21.13 --- Theta29 ? 30th PSF SCALPELS principal component
753- 773 E21.13 --- Theta30 ? 31st PSF SCALPELS principal component
775- 795 E21.13 --- Theta31 ? 32nd PSF SCALPELS principal component
797- 814 F18.15 --- Theta32 ? 33rd PSF SCALPELS principal component
816- 836 E21.13 --- Theta33 ? 34th PSF SCALPELS principal component
838- 855 F18.15 --- Theta34 ? 35th PSF SCALPELS principal component
857- 876 E20.12 --- Theta35 ? 36th PSF SCALPELS principal component
878- 895 F18.15 --- Theta36 ? 37th PSF SCALPELS principal component
897- 917 E21.13 --- Theta37 ? 38th PSF SCALPELS principal component
919- 939 E21.13 --- Theta38 ? 39th PSF SCALPELS principal component
941- 961 E21.13 --- Theta39 ? 40th PSF SCALPELS principal component
963- 982 E20.12 --- Theta40 ? 41st PSF SCALPELS principal component
984-1001 F18.15 --- Theta41 ? 42nd PSF SCALPELS principal component
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Byte-by-byte Description of file: cheodet*.dat ngtsdet.dat tdets*.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 18 F18.10 d BJD Barycentric Julian date
20- 37 F18.16 --- Flux Normalised detrended flux
39- 59 F21.19 --- e_Flux Normalised flux error
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Byte-by-byte Description of file: [acs]*.dat traw*.dat wasp.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 18 F18.10 d BJD Barycentric Julian date
20- 37 F18.16 --- Flux Normalised flux
39- 59 F21.19 --- e_Flux Normalised flux error
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Byte-by-byte Description of file: ngtsraw.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 16 F16.8 d BJD Barycentric Julian date
18- 27 F10.8 --- Flux Normalised flux
29- 38 F10.8 --- e_Flux Normalised flux error
40- 47 F8.6 --- Airmass Airmass
49- 57 F9.3 ct SkyBkg Sky background
59- 66 F8.3 pix X X centroid position
68- 75 F8.3 pix Y Y centroid position
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Byte-by-byte Description of file: harpsraw.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 16 F16.8 d BJD Barycentric Julian date
18- 33 F16.10 m/s RV Radial velocity
35- 50 F16.14 m/s e_RV Radial velocity error
52- 55 F4.1 m/s BIS Bisector span of the CCF
57- 62 F6.1 m/s FWHM FWHM of the CCF
64- 70 F7.4 --- Contrast Contrast of the CCF
72- 77 F6.4 --- Sindex S index
79- 84 F6.4 --- Halpha Hα activity index
86- 91 F6.4 --- NaD1 Na D1 activity index
93- 98 F6.4 --- NaD2 Na D2 activity index
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Byte-by-byte Description of file: harpsccf.dat
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Bytes Format Units Label Explanations
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1- 16 F16.8 d BJD Barycentric Julian date
18- 33 F16.10 m/s RV Radial velocity
35- 50 F16.14 m/s e_RV Radial velocity error
52- 69 F18.15 --- Theta0 1st CCF SCALPELS principal component
71- 88 F18.15 --- Theta1 2nd CCF SCALPELS principal component
90-107 F18.15 --- Theta2 3rd CCF SCALPELS principal component
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Byte-by-byte Description of file: gems562.dat gems832.dat
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Bytes Format Units Label Explanations
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1- 3 I3 nm lambda Wavelength (562 or 832)
5- 11 F7.5 arcsec Sep Separation
13- 19 F7.5 --- Deltamag Delta magnitude
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Acknowledgements:
Thomas G. Wilson, tgw1(at)st-andrews.ac.uk
(End) Patricia Vannier [CDS] 26-Apr-2022