J/AJ/160/129 HARPS, HIRES and AAT Radial Velocities of HD 136352 (Kane+, 2020)
Transits of known planets orbiting a naked-eye star.
Kane S.R., Yalcinkaya S., Osborn H.P., Dalba P.A., Nielsen L.D.,
Vanderburg A., Mocnik T., Hinkel N.R., Ostberg C., Esmer E.M., Udry S.,
Fetherolf T., Basturk O., Ricker G.R., Vanderspek R., Latham D.W.,
Seager S., Winn J.N., Jenkins J.M., Allart R., Bailey J., Bean J.L.,
Bouchy F., Butler R.P., Campante T.L., Carter B.D., Daylan T., Deleuil M.,
Diaz R.F., Dumusque X., Ehrenreich D., Horner J., Howard A.W., Isaacson H.,
Jones H.R.A., Kristiansen M.H., Lovis C., Marcy G.W., Marmier M.,
O'Toole S.J., Pepe F., Ragozzine D., Segransan D., Tinney C.G.,
Turnbull M.C., Wittenmyer R.A., Wright D.J., Wright J.T.
<Astron. J., 160, 129 (2020)>
=2020AJ....160..129K 2020AJ....160..129K
ADC_Keywords: Exoplanets; Stars, G-type; Spectra, optical; Radial velocities
Keywords: Exoplanets ; Exoplanet atmospheres ; Exoplanet structure ;
Transit photometry ; Radial velocity
Abstract:
Some of the most scientifically valuable transiting planets are those
that were already known from radial velocity (RV) surveys. This is
primarily because their orbits are well characterized and they
preferentially orbit bright stars that are the targets of RV surveys.
The Transiting Exoplanet Survey Satellite (TESS) provides an
opportunity to survey most of the known exoplanet systems in a
systematic fashion to detect possible transits of their planets.
HD136352 (Nu Lupi) is a naked-eye (V=5.78) G-type main-sequence star
that was discovered to host three planets with orbital periods of
11.6, 27.6, and 108.1days via RV monitoring with the High Accuracy
Radial velocity Planet Searcher (HARPS) spectrograph. We present the
detection and characterization of transits for the two inner planets
of the HD136352 system, revealing radii of 1.482-0.056+0.058
R⊕ and 2.608-0.077+0.078 R⊕ for planets b and c,
respectively. We combine new HARPS observations with RV data from the
Keck/High Resolution Echelle Spectrometer and the Anglo-Australian
Telescope, along with TESS photometry from Sector 12, to perform a
complete analysis of the system parameters. The combined data analysis
results in extracted bulk density values of
ρb=7.8-1.1+1.2g/cm3 and ρc=3.50-0.36+0.41g/cm3 for
planets b and c, respectively, thus placing them on either side of the
radius valley. The combination of the multitransiting planet system,
the bright host star, and the diversity of planetary interiors and
atmospheres means this will likely become a cornerstone system for
atmospheric and orbital characterization of small worlds.
Description:
The radial velocity (RV) data used for this analysis were acquired
from three different observing facilities.
The first data set consists of 246 RV measurements obtained over a
period of 13.2yr using the High Accuracy Radial velocity Planet
Searcher spectrograph (HARPS).
The second data set consists of 169 RV measurements obtained over a
period of 17.3yr using the University College London Echelle
Spectrograph (UCLES) high-resolution spectrograph on the 3.9m
Anglo-Australian Telescope (AAT). The instrument uses an iodine
absorption cell to provide wavelength calibration from 5000 to
6200Å.
The third data set consists of 43 RV measurements obtained over a
period of 12.0yr using the High Resolution Echelle Spectrometer
(HIRES) echelle spectrograph on the Keck I telescope.
Objects:
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RA (2000) DE Designation(s)
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15 21 48.15 -48 19 03.5 HD136352 = HD 136352
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 29 458 HD136352 radial velocities
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See also:
I/345 : Gaia DR2 (Gaia Collaboration, 2018)
IV/38 : TESS Input Catalog - v8.0 (TIC-8) (Stassun+, 2019)
J/A+A/356/238 : Atmospheric param. in metal-poor stars. III. (Carretta+, 2000)
J/A+A/375/L27 : HD 80606b, planet on an extremely elongated orbit (Naef+,2001)
J/ApJ/754/37 : HD 192263 radial velocities and photometry (Dragomir+, 2012)
J/ApJ/761/46 : HD 37605 radial velocities and photometry (Wang+, 2012)
J/ApJ/768/155 : Radial velocities & photometry of HD38529 system (Henry+, 2013)
J/AJ/148/54 : The Hypatia Catalog ((Hinkel+, 2014)
J/AJ/150/169 : Radial velocities of HD 6434 (Hinkel+, 2015)
J/A+A/584/A72 : Transiting rocky planet at 6.5pc from the Sun (Motalebi+, 2015)
J/AJ/154/109 : California-Kepler Survey. III. Planet radii (Fulton+, 2017)
J/AJ/156/102 : The TESS Input Catalog & Candidate Target List (Stassun+,2018)
J/AJ/159/241 : TESS-Keck Survey. I. HD332231 Radial Velocities (Dalba+, 2020)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 5 A5 --- Inst Instrument (1)
7- 15 F9.4 d BJD [915/8629] Barycentric Julian Date; BJD-2450000
17- 23 F7.3 m/s RVel [-13.6/20.3] Radial velocity
25- 29 F5.3 m/s e_RVel [0.27/3.38] Uncertainty in RVel
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Note (1): Instruments as follows:
AAT = 3.9 m Anglo-Australian Telescope (169 occurrences)
HARPS = High Accuracy Radial velocity Planet Searcher spectrograph
(246 occurrences)
HIRES = High Resolution Echelle Spectrometer (43 occurrences)
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History:
From electronic version of the journal
(End) Prepared by [AAS], Coralie Fix [CDS], 23-Oct-2020