J/A+A/650/A205 Search for transiting planets around sdBs (Van Grootel+, 2021)
A search for transiting planets around hot subdwarfs. I.
Methods and performance tests on light curves from Kepler, K2, TESS, and CHEOPS.
Van Grootel V., Pozuelos F.J., Thuillier A., Charpinet S., Delrez L.,
Beck M., Fortier A., Hoyer S., Sousa S.G., Barlow B.N., Billot N.,
Devora-Pajares M., Ostensen R.H., Alibert Y., Alonso R., Anglada Escude G.,
Asquier J., Barrado D., Barros S.C.C., Baumjohann W., Beck T., Bekkelien A.,
Benz W., Bonfils X., Brandeker A., Broeg C., Bruno G., Barczy T.,
Cabrera J., Cameron A.C., Charnoz S., Davies M.B., Deleuil M.,
Demangeon O.D.S., Demory B.-O., Ehrenreich D., Erikson A., Fossati L.,
Fridlund M., Futyan D., Gandolfi D., Gillon M., Guedel M., Heng K.,
Isaak K.G., Kiss L., Laskar J., Lecavelier des Etangs A., Lendl M.,
Lovis C., Magrin D., Maxted P.F.L., Mecina M., Mustill A.J., Nascimbeni V.,
Olofsson G., Ottensamer R., Pagano I., Palle E., Peter G., Piotto G.,
Plesseria J.-Y., Pollacco D., Queloz D., Ragazzoni R., Rando N., Rauer H.,
Ribas I., Santos N.C., Scandariato G., Segransan D., Silvotti R.,
Simon A.E., Smith A.M.S., Steller M., Szabo G.M., Thomas N., Udry S.,
Viotto V., Walton N.A., Westerdorff K., Wilson T.G.
<Astron. Astrophys. 650, A205 (2021)>
=2021A&A...650A.205V 2021A&A...650A.205V (SIMBAD/NED BibCode)
ADC_Keywords: Stars, subdwarf ; Photometry ; Optical
Keywords: planet-star interactions - planetary systems -
stars: horizontal branch - subdwarfs - techniques: photometric
Abstract:
Hot subdwarfs experienced strong mass loss on the red giant branch
(RGB) and are now hot and small He-burning objects. These stars
constitute excellent opportunities for addressing the question of the
evolution of exoplanetary systems directly after the RGB phase of
evolution. In this project we aim to perform a transit survey in all
available light curves of hot subdwarfs from space-based telescopes
(Kepler, K2, TESS, and CHEOPS) with our custom-made pipeline SHERLOCK
in order to determine the occurrence rate of planets around these
stars as a function of orbital period and planetary radius. We also
aim to determine whether planets that were previously engulfed in the
envelope of their red giant host star can survive, even partially, as
a planetary remnant. For this first paper, we performed
injection-and-recovery tests of synthetic transits for a selection of
representative Kepler, K2, and TESS light curves to determine which
transiting bodies in terms of object radius and orbital period we will
be able to detect with our tools. We also provide estimates for CHEOPS
data, which we analyzed with the pycheops package. Transiting objects
with a radius ≲1.0R⊕ can be detected in most of the Kepler,
K2, and CHEOPS targets for the shortest orbital periods (1d and
shorter), reaching values as low as ∼0.3R⊕ in the best cases.
Sub-Earth-sized bodies are only reached for the brightest TESS
targets and for those that were observed in a significant number
of sectors. We also give a series of representative results for
larger planets at greater distances, which strongly depend on the
target magnitude and on the length and quality of the data. The
TESS sample will provide the most important statistics for the global
aim of measuring the planet occurrence rate around hot subdwarfs. The
Kepler, K2, and CHEOPS data will allow us to search for planetary
remnants, that is, very close and small (possibly disintegrating)
objects.
Description:
We present the Hot subdwarf catalogues for TESS.
In addition, we present the photometric light curves observed by
CHEOPS for the candidates: HD 149382 in its fifth visit, CW83 1419-09
in its first visit, TYC 982-6141 in its fourth visit, and
TYC 499-2297-1 in its fourth visit.
Extended versions of the catalogues, including those for Kepler and K2
can be found in: https://github.com/franpoz/Hot-Subdwarfs-Catalogues
Objects:
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RA (2000) DE Designation(s)
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16 34 23.33 -04 00 52.0 HD 149382 = HIP 81145
14 22 40.32 -09 17 21.8 CW83 1419-09 = 2MASS J14224032-0917217
20 09 51.68 +03 10 31.7 TYC 499-2297-1 = 2MASS J20095165+0310317
17 16 21.54 +09 33 23.5 TYC 982-6141 = 2MASS J17162153+0933235
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
appc.dat 147 1302 List of hot subdwarfs observed in the
TESS primary mission (Sect. 1-26)
appd2.dat 147 269 List of hot subdwarfs observed in the
TESS extended mission (2-min)
appd1.dat 147 1013 List of hot subdwarfs observed in the
TESS extended mission (20-sec)
hd14dec.dat 26 227 CHEOPS LC of HD149382 (decorrelated data)
hd14raw.dat 26 233 CHEOPS LC of HD149382 (raw data)
cw83dec.dat 26 246 CHEOPS LC of CW83 1419-09 (decorrelated data)
cw83raw.dat 26 251 CHEOPS LC of CW83 1419-09 (raw data)
tyc49dec.dat 26 144 CHEOPS LC of TYC 499-2297-1 (decorrelated data)
tyc49raw.dat 26 159 CHEOPS LC of TYC 499-2297-1 (raw data)
tyc98dec.dat 26 245 CHEOPS LC of TYC 982-6141 (decorrelated data)
tyc98raw.dat 26 254 CHEOPS LC of TYC 982-6141 (raw data)
tableb1.dat 81 174 Hot subdwarfs observed in the K2 fields
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See also:
II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
I/345 : Gaia DR2 (Gaia Collaboration, 2018)
IV/38 : TESS Input Catalog - v8.0 (TIC-8) (Stassun+, 2019)
Byte-by-byte Description of file: appc.dat appd2.dat appd1.dat
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Bytes Format Units Label Explanations
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1- 10 I10 --- TIC Tess Imput Catalog ID
12- 27 A16 --- 2MASS 2MASS ID
29- 47 I19 --- GaiaDR2 GAIA DR2 ID
49- 76 A28 --- Name Name
78- 89 F12.3 pc Dist Distance
91-103 F13.3 pc e_Dist Distance error
105-114 F10.6 deg RAdeg Right ascension (J2000)
116-125 F10.6 deg DEdeg Declination (J2000)
127-136 F10.6 deg Lambda Lambda
138-147 F10.6 deg Beta Beta
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Byte-by-byte Description of file: hd14dec.dat hd14raw.dat
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Bytes Format Units Label Explanations
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1- 8 F8.6 d BJD Barycentric Julian Date (BJD-2459020)
10- 17 F8.6 --- Flux Normalized flux
19- 26 F8.6 --- e_Flux Normalized flux error
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Byte-by-byte Description of file: cw83dec.dat cw83raw.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 8 F8.6 d BJD Barycentric Julian Date (BJD-2458962)
10- 17 F8.6 --- Flux Normalized flux
19- 26 F8.6 --- e_Flux Normalized flux error
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Byte-by-byte Description of file: tyc49dec.dat tyc49raw.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 8 F8.6 d BJD Barycentric Julian Date (BJD-2459064)
10- 17 F8.6 --- Flux Normalized flux
19- 26 F8.6 --- e_Flux Normalized flux error
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Byte-by-byte Description of file: tyc98dec.dat tyc98raw.dat
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Bytes Format Units Label Explanations
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1- 8 F8.6 d BJD Barycentric Julian Date (BJD-2459027)
10- 17 F8.6 --- Flux Normalized flux
19- 26 F8.6 --- e_Flux Normalized flux error
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Byte-by-byte Description of file: tableb1.dat
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Bytes Format Units Label Explanations
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1 A1 --- Type Type (1)
3- 11 I9 --- KIC K2 (Cat. IV/34) identification number
13- 22 A10 --- Class Classification
24- 48 A25 --- OName Other name
50- 54 F5.2 mag Kpmag Kepler magnitude
57- 68 A12 ---- CSC Campaign (SC) (2)
70- 81 A12 --- CLC Campaign (LC)
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Note (1): type as follows:
A = sdB pulsators
B = sdB/sdOB non pulsators, single
C = sdB/sdOB non pulsators, in binaries
D = sdO non pulsators
E = Misc., in LC only
Note (2): T: engineering test from 4 to 13 February 2014; Campaign 0
(8 March-27 May 2014) to 18 (12 May-2 July 2018),
https://keplergo.github.io/KeplerScienceWebsite/k2-fields.html
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Acknowledgements:
Francisco Pozuelos-Romero, fjpozuelos(at)uliege.be
History:
29-Jun-2021: on-line version
14-Sep-2023: some typo on TIC numbers corrected in appd1.dat
(End) Patricia Vannier [CDS] 28-May-2021