J/A+A/656/A124 TOI-1201 RV and activity index (Kossakowski+, 2021)
TOI-1201 b: A mini-Neptune transiting a bright and moderately young M dwarf.
Kossakowski D., Kemmer J., Bluhm P., Stock S., Caballero J.A., Bejar V.J.S.,
Cardona Guillen C., Lodieu N., Collins K.A., Oshagh M., Schlecker M.,
Espinoza N., Palle E., Henning Th., Kreidberg L., Kuerster M., Amado P.J.,
Anderson D.R., Morales J.C., Cartwright S., Charbonneau D., Chaturvedi P.,
Cifuentes C., Conti D.M., Cortes-Contreras M., Dreizler S.,
Galadi-Enriquez D., Guerra P., Hart R., Hellier C., Henze C., Herrero E.,
Jeffers S.V., Jenkins J.M., Jensen E.L.N., Kaminski A., Kielkopf J.F.,
Kunimoto M., Lafarga M., Latham D.W., Lillo-Box J., Luque R.,
Molvaerdikhani K., Montes D., Morello G., Morgan E.H., Nowak G., Pavlov A.,
Perger M., Quintana E.V., Quirrenbach A., Reffert S., Reiners A., Ricker G.,
Ribas I., Rodriguez Lopez C., Zapatero Osorio M.R., Seager S., Schoefer P.,
Schweitzer A., Trifonov T., Vanaverbeke S., Vanderspek R., West R., Winn J.,
Zechmeister M.
<Astron. Astrophys. 656, A124 (2021)>
=2021A&A...656A.124K 2021A&A...656A.124K (SIMBAD/NED BibCode)
ADC_Keywords: Stars, double and multiple ; Exoplanets ; Radial velocities ;
Optical
Keywords: techniques: photometric - techniques: radial velocities -
planetary systems - stars: individual: TOI-1201 -
stars: individual: TIC-29960110 - stars: low-mass
Abstract:
We present the discovery of a transiting mini-Neptune around TOI-1201,
a relatively bright and moderately young early M dwarf (J∼9.5mag,
∼600-800Myr) in an equal-mass ∼8arcsecond-wide binary system, using
data from the Transiting Exoplanet Survey Satellite (TESS), along with
follow-up transit observations. With an orbital period of 2.49d,
TOI-1201∼b is a warm mini-Neptune with a radius of
Rb=2.415±0.090R⊕. This signal is also present in the
precise radial velocity measurements from CARMENES, confirming the
existence of the planet and providing a planetary mass of
Mb=6.28±0.88M⊕ and, thus, an estimated bulk density of
2.45+0.48-0.42g/cm3. The spectroscopic observations additionally
show evidence of a signal with a period of 19d and a long periodic
variation of undetermined origin. In combination with ground-based
photometric monitoring from WASP-South and ASAS-SN, we attribute the
19d signal to the stellar rotation period (Prot=19-23d), although we
cannot rule out that the variation seen in photometry belongs to the
visually close binary companion. We calculate precise stellar
parameters for both TOI-1201 and its companion. The transiting planet
is an excellent target for atmosphere characterization (the
transmission spectroscopy metric is 97+21-16) with the upcoming
James Webb Space Telescope. It is also feasible to measure its
spin-orbit alignment via the Rossiter-McLaughlin effect using current
state-of-the-art spectrographs with submeter per second radial
velocity precision.
Description:
High-resolution spectroscopy taken with the CARMENES VIS instrument
for the two M dwarfs in a binary system, TOI-1201 and its companion
(PM J02489-1432E). Likewise, the stellar activity indicators are
output from the SERVAL pipeline (Zechmeister et al.
2018A&A...609A..12Z 2018A&A...609A..12Z), namely, this entails the chromatic index (CRX),
the differential line width (dLW), the Halpha index, the Calcium
triplet lines (CAIRT). The photospheric TiO absorption band indices
(at 7050Å, 8430Å, and 8860Å) following Schoefer et al.
(2019A&A...623A..44S 2019A&A...623A..44S, Cat. J/A+A/623/A44) are included. Also, the
cross-correlation function parameters, as provided following Lafarga
et al. (2020A&A...636A..36L 2020A&A...636A..36L, Cat. J/A+A/636/A36), are included and
these are: bisector velocity span (BVS), contrast (CTR), and full
width at half maximum (FWHM).
Most observations are simultaneously, however there are 33 data points
for TOI-1201 (Nov. 2019 - Feb. 2020) and 23 for PM J02489-1432E
(Nov. 2019 - Jan. 2020).
Objects:
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RA (2000) DE Designation(s)
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02 48 59.27 -14 32 14.9 TOI-1201 = PM J02489-1432W = 2MASS J02485926-1432152
02 48 59.83 -14 32 16.2 TOI-393 = PM J02489-1432E = 2MASS J02485981-1432164
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tablee1.dat 478 33 TOI-1201: RVs and various stellar activity
indicators from CARMENES VIS
tablee2.dat 478 23 PM J02489-1432E: RVs fand various stellar
activity indicators from CARMENES VIS
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Byte-by-byte Description of file: tablee?.dat
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Bytes Format Units Label Explanations
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1- 13 F13.5 d BJD Barycentric Julian date
15- 35 F21.17 m/s RV Radial velocity
37- 54 F18.16 m/s e_RV Radial velocity uncertainty
56- 76 F21.17 --- CRX Chromatic index (in m/s/Np)
78- 95 F18.15 --- e_CRX Chromatic index uncertainty(in m/s/Np)
97-113 F17.13 1000m2/s2 dLW Differential line width
115-127 F13.11 1000m2/s2 e_dLW Differential line width uncertainty
129-146 F18.16 --- Cairt1 CaII-IRT1 index (8498.02) (-15,15)km/s
148-168 F21.19 --- e_Cairt1 CaII-IRT1 index uncertainty
170-188 F19.17 --- Cairt2 CaII-IRT2 index (8542.09) (-15,15)km/s
190-210 F21.19 --- e_Cairt2 CaII-IRT2 index uncertainty
212-230 F19.17 --- Cairt3 CaII-IRT3 index (8662.14) (-15,15)km/s
232-252 F21.19 --- e_Cairt3 CaII-IRT3 index uncertainty
254-271 F18.16 --- Halpha Hα index
273-293 F21.19 --- e_Halpha Hα index uncertainty
295-304 F10.8 --- TiO7050 Photospheric TiO absorption band index
at 7050Å
306-326 F21.19 --- e_TiO7050 Photospheric TiO absorption band index
at 7050Å uncertainty
328-337 F10.8 --- TiO8430 Photospheric TiO absorption band index
at 8430Å index
339-359 F21.19 --- e_TiO8430 Photospheric TiO absorption band index
at 8430Å index uncertainty
361-370 F10.8 --- TiO8860 Photospheric TiO absorption band index
at 8860Å index
372-392 F21.19 --- e_TiO8860 Photospheric TiO absorption band index
at 8860Å index uncertainty
394-414 F21.17 km/s BVS CCF bisector velocity span
416-433 F18.15 km/s e_BVS CCF Bisector velocity span uncertainty
435-445 F11.8 % CTR CCF contrast
447-456 F10.8 % e_CTR CCF contrast uncertainty
458-467 F10.8 km/s FWHM CCF full width at half maximum
469-478 F10.8 km/s e_FWHM CCF full width at half maximum uncertainty
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Acknowledgements:
Diana Kossakowski, kossakowski(at)pia.de
(End) Patricia Vannier [CDS] 17-Sep-2021