J/A+A/636/A58 L 168-9 radial velocity curve (Astudillo-Defru+, 2020)
A hot terrestrial planet orbiting the bright M dwarf L 168-9 unveiled by TESS.
Astudillo-Defru N., Cloutier R., Wang S.X., Teske J., Brahm R., Hellier C.,
Ricker G., Vanderspek R., Latham D., Seager S., Winn J.N., Jenkins J.M.,
Collins K.A., Stassun K.G., Ziegler C., Almenara J.M., Anderson D.R.,
Artigau E., Bonfils X., Bouchy F., Briceno C., Butler R.P., Charbonneau D.,
Conti D.M., Crane J., Crossfield I.J.M., Davies M., Delfosse X., Diaz R.F.,
Doyon R., Dragomir D., Eastman J.D., Espinoza N., Essack Z., Feng F.,
Figueira P., Forveille T., Gan T., Glidden A., Guerrero N., Hart R.,
Henning Th., Horch E.P., Isopi G., Jenkins J.S., Jordan A., Kielkopf J.F.,
Law N., Lovis C., Mallia F., Mann A.W., de Medeiros J.R., Melo C.,
Mennickent R.E., Mignon L., Murgas F., Nusdeo D.A., Pepe F., Relles H.M.,
Rose M., Santos N.C., Segransan D., Shectman S., Shporer A., Smith J.C.,
Torres P., Udry S., Villasenor J., Winters J .G., Zhou G.
<Astron. Astrophys. 636, A58 (2020)>
=2020A&A...636A..58A 2020A&A...636A..58A (SIMBAD/NED BibCode)
ADC_Keywords: Stars, double and multiple ; Exoplanets ; Radial velocities
Keywords: stars: individual: L 168-9 - planetary systems - stars: late-type -
technique: photometric - radial velocities
Abstract:
We report the detection of a transiting super-Earth-sized planet
(R=1.39±0.09R⊕) in a 1.4-day orbit around L 168-9 (TOI-134),
a bright M1V dwarf (V=11, K=7.1) located at 25.15±0.02pc. The host
star was observed in the first sector of the Transiting Exoplanet
Survey Satellite (TESS) mission. For confirmation and planet mass
measurement purposes, this was followed up with ground-based
photometry, seeing-limited and high-resolution imaging, and precise
radial velocity (PRV) observations using the HARPS and Magellan/PFS
spectrographs. By combining the TESS data and PRV observations, we
find the mass of L 168-9 b to be 4.60±0.56M⊕ and thus the
bulk density to be 1.74+0.44-0.33 times higher than that of the
Earth. The orbital eccentricity is smaller than 0.21 (95% confidence).
This planet is a level one candidate for the TESS mission's
scientific objective of measuring the masses of 50 small planets, and
it is one of the most observationally accessible terrestrial planets
for future atmospheric characterization.
Description:
We acquired high resolution spectra with HARPS and PFS to compute
precise radial velocities.
Objects:
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RA (2000) DE Designation(s)
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23 20 07.52 -60 03 54.6 L 168-9 = CD-60 8051
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
tableb1.dat 101 49 HARPS time series for L 168-9
tableb2.dat 36 76 PFS time series for L 168-9
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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- 11 F11.6 d BJD Barycentric Julian date (BJD-2450000)
13- 20 F8.2 m/s RV Radial velocity
22- 25 F4.2 m/s s_RV Radial velocity dispersion
27- 33 F7.5 --- Ha Halpha index
35- 41 F7.5 --- s_Ha Halpha index dispersion
43- 49 F7.5 --- Hb Hbeta index
51- 57 F7.5 --- s_Hb Hbeta index dispersion
59- 65 F7.5 --- Hg Hgamma index
67- 73 F7.5 --- s_Hg Hgamma index dispersion
75- 81 F7.5 --- NaD NaD-index
83- 89 F7.5 --- s_NaD NaD-index dispersion
91- 95 F5.3 --- S S-index
97-101 F5.3 --- s_S S-index dispersion
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Byte-by-byte Description of file: tableb2.dat
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Bytes Format Units Label Explanations
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1- 10 F10.5 d BJD Barycentric Julian date (BJD-2450000)
12- 17 F6.2 m/s RV Radial velocity
19- 22 F4.2 m/s s_RV Radial velocity dispersion
24- 28 F5.3 --- Ha Halpha index
30- 36 F7.5 --- S S-index
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Acknowledgements:
Nicola Astudillo-Defru, nastudillo(at)ucsc.cl
(End) Patricia Vannier [CDS] 12-Feb-2020