J/AJ/165/265 Properties of 363 M-dwarfs from TESS (Ment+, 2023)
The Occurrence Rate of Terrestrial Planets Orbiting Nearby Mid-to-late M Dwarfs
from TESS Sectors 1-42.
Ment K., Charbonneau D.
<Astron. J., 165, 265 (2023)>
=2023AJ....165..265M 2023AJ....165..265M
ADC_Keywords: Exoplanets; Stars, M-type; Optical; Stars, masses;
Stars, diameters
Keywords: Transit photometry ; Exoplanet systems ; Exoplanets ; Low mass
stars ; Transits
Abstract:
We present an analysis of a volume-complete sample of 363 mid-to-late
M-dwarfs within 15pc of the Sun with masses between 0.1 and 0.3M☉
observed by TESS within sectors 1-42. The median stellar mass of the
sample is 0.17M☉. We search the TESS light curves for transiting
planets with orbital periods below 7 days and recover all six known
planets within the sample, as well as a likely planet candidate
orbiting LHS-475. Each of these planets is consistent with a
terrestrial composition, with planet radii between 0.91 and
1.31R⊕. We characterize the transit detection sensitivity for
each star as a function of planet radius, insolation, and orbital
period. We obtain a cumulative occurrence rate of 0.61-0.19+0.24
terrestrial planets per star with radii above 0.5R⊕ and orbital
periods between 0.4 and 7days. We find that for comparable
insolations, planets larger than 1.5R⊕ (sub-Neptunes) are
significantly less abundant around mid-to-late M dwarfs compared to
earlier-type stars, while the occurrence rate of terrestrial planets
is comparable to that of more massive M-dwarfs. We estimate that
overall, terrestrials outnumber sub-Neptunes around mid-to-late
M-dwarfs by 14 to 1, in contrast to GK dwarfs, where they are roughly
equinumerous. We place a 1σ upper limit of 0.07 planets larger
than 1.5R⊕ per star within the orbital period range of
0.5-7days. We find evidence for a downturn in occurrence rates for
planet radii below 0.9R⊕, suggesting that Earth-sized and larger
terrestrials may be more common around mid-to-late M-dwarfs.
Description:
This paper includes data collected by the TESS mission, which are
publicly available from the Mikulski Archive for Space Telescopes
(MAST). All of the TESS data used in this paper can be found in MAST:
(http://archive.stsci.edu/doi/resolve/resolve.html?doi=10.17909/jc9t-3m87).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 146 363 Properties of target stars
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See also:
J/ApJ/757/112 : Stellar diameters. II. K and M-stars (Boyajian+, 2012)
J/A+A/549/A109 : HARPS XXXI. The M-dwarf sample (Bonfils+, 2013)
J/ApJ/767/95 : Improv stellar parameters of small KIC stars (Dressing+, 2013)
J/AJ/147/85 : Solar neighborhood. XXXIII. 45 M dwarfs (Riedel+, 2014)
J/ApJ/807/45 : Potentially habitable planets orbit M dwarfs (Dressing+, 2015)
J/ApJ/804/64 : Empirical and model parameters of 183 M dwarfs (Mann+, 2015)
J/ApJ/814/130 : Planet occurrence rates calculated for KOIs (Mulders+, 2015)
J/ApJ/831/125 : ALMA 887µm obs. of ChaI SFR (Pascucci+, 2016)
J/AJ/154/109 : California-Kepler Survey. III. Planet radii (Fulton+, 2017)
J/A+A/618/A142 : Radial velocity for GJ 1132 (Bonfils+, 2018)
J/A+A/618/A20 : Limb-darkening for TESS, Kepler, Corot, MOST (Claret, 2018)
J/AJ/156/264 : California-Kepler Survey VII Planet radius gap (Fulton+, 2018)
J/AJ/155/89 : California-Kepler Survey (CKS). IV. Planets (Petigura+, 2018)
J/AJ/155/122 : HAZMAT. III. Lowmass stars GALEX photometry (Schneider+, 2018)
J/AJ/156/102 : TESS Input Catalog and Candidate Target List (Stassun+, 2018)
J/AJ/158/75 : Mid-type Mdwarfs planet occurrence (Hardegree-Ullman+, 2019)
J/AJ/158/109 : Occurrence rates of planets orbiting FGK stars (Hsu+, 2019)
J/AJ/159/211 : Exoplanets parameters from Kepler and K2 (Cloutier+, 2020)
J/AJ/160/253 : IR photometry of late-type dwarfs in Kepler Field (Lu+, 2020)
J/AJ/162/174 : HARPS radial velocity follow up of GJ 1214 (Cloutier+, 2021)
J/AJ/161/23 : RVel & light curve of low mass star TOI 540 (Ment+, 2021)
J/AJ/161/63 : Mdwarfs masses 0.1≲M/M☉≲0.3 within 15pc (Winters+, 2021)
J/other/Sci/377.1211 : RV and LC of 8 M dwarf stars with planets (Luque+, 2022)
J/AJ/163/168 : Photometry and radial velocity of LTT 1445A (Winters+, 2022)
http://archive.stsci.edu/doi/resolve/resolve.html?doi=10.17909/jc9t-3m87 : MAST
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 9 I9 -- TIC TESS Input Catalog ID
11- 72 A62 -- Sector TESS Sectors
74- 89 A16 -- 2MASS 2MASS Catalog ID
91- 91 A1 -- Comp Component identifier; if a multiple system
93-100 F8.4 arcsec Sep [0.001/804]? Component separatio
102-107 F6.3 pc Dist [1.3/15] Distance
109-113 F5.2 mag Vmag [9.69/100] Apparent V band magnitude
115-120 F6.3 mag Jmag [5.35/11.4] Apparent J band magnitude
122-126 F5.3 Msun Mass [0.1/0.3] Mass
128-132 F5.3 Rsun Rad [0.15/0.3] Radius
134-140 F7.5 Lsun Lum [0/0.02] Luminosity
142-146 F5.3 d PRot [0.08/5.28]? Rotation period
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History:
From electronic version of the journal
(End) Prepared by [AAS], Coralie Fix [CDS], 16-Oct-2023