J/AJ/161/119 The TESS-Keck survey. IV. Rvel for WASP-107 (Rubenzahl+, 2021)
The TESS-Keck survey.
IV. A retrograde, polar orbit for the ultra-low-density, Hot super-Neptune
WASP-107b.
Rubenzahl R.A., Dai F., Howard A.W., Chontos A., Giacalone S., Lubin J.,
Rosenthal L.J., Isaacson H., Batalha N.M., Crossfield I.J.M., Dressing C.,
Fulton B., Huber D., Kane S.R., Petigura E.A., Robertson P., Roy A.,
Weiss L.M., Beard C., Hill M.L., Mayo A., Mocnik T., Murphy J.M.A.,
Scarsdale N.
<Astron. J., 161, 119 (2021)>
=2021AJ....161..119R 2021AJ....161..119R
ADC_Keywords: Surveys; Exoplanets; Stars, G-type; Radial velocities; Optical
Keywords: Exoplanet dynamics ; Orbit determination ; Radial velocity
Abstract:
We measured the Rossiter-McLaughlin effect of WASP-107b during a
single transit with Keck/HIRES. We found the sky-projected inclination
of WASP-107b's orbit, relative to its host star's rotation axis, to be
|λ|=118-19+38degrees. This confirms the misaligned/polar
orbit that was previously suggested from spot-crossing events and adds
WASP-107b to the growing population of hot Neptunes in polar orbits
around cool stars. WASP-107b is also the fourth such planet to have a
known distant planetary companion. We examined several dynamical
pathways by which this companion could have induced such an obliquity
in WASP-107b. We find that nodal precession and disk dispersal-driven
tilting can both explain the current orbital geometry while
Kozai-Lidov cycles are suppressed by general relativity. While each
hypothesis requires a mutual inclination between the two planets,
nodal precession requires a much larger angle, which for WASP-107 is
on the threshold of detectability with future Gaia astrometric data.
As nodal precession has no stellar type dependence, but disk
dispersal-driven tilting does, distinguishing between these two models
is best done on the population level. Finding and characterizing more
extrasolar systems like WASP-107 will additionally help distinguish
whether the distribution of hot-Neptune obliquities is a dichotomy of
aligned and polar orbits or if we are uniformly sampling obliquities
during nodal precession cycles.
Description:
We observed the Rossiter-McLaughlin (RM) effect for WASP-107b during a
transit on 2020 February 26 (UTC) with (High Resolution Echelle
Spectrometer) HIRES on the KeckI Telescope on Maunakea. Our HIRES
observations covered the full transit duration (∼2.7hr) with a ∼1hour
baseline on either side. (R=45000)
Objects:
--------------------------------------------------------------
RA (2000) DE Designation(s) (Period)
--------------------------------------------------------------
12 33 32.84 -10 08 46.2 WASP-107 = WASP-107 (P=5.7214742d)
--------------------------------------------------------------
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 28 22 Radial velocities of WASP-107
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See also:
I/259 : The Tycho-2 Catalogue (Hog+, 2000)
J/ApJS/159/141 : Spectroscopic properties of cool stars. I. (Valenti+, 2005)
J/A+A/517/L1 : Radial velocities of WASP-8b planet (Queloz+, 2010)
J/ApJ/723/L223 : Radial velocities of HAT-P-11 (Winn+, 2010)
J/ApJS/225/32 : Extended abundance analysis of cool stars (Brewer+, 2016)
J/ApJ/832/183 : Binary stellar evolution for Kepler systems (Kostov+, 2016)
J/ApJ/836/77 : Library of high-S/N optical spectra of FGKM stars (Yee+, 2017)
J/AJ/155/255 : Rvel and activity measurements of HAT-P-11 (Yee+, 2018)
J/AJ/159/241 : TESS-Keck Survey I. HD332231 Radial Velocities (Dalba+, 2020)
J/A+A/640/A73 : pi Men radial velocity curves (De Rosa+, 2020)
J/AJ/160/259 : HPF RVs and TESS photometry of TOI-1266 (Stefansson+, 2020)
J/AJ/161/70 : RVel for WASP-170 with HIRES & CORALIE (Piaulet+, 2021)
Byte-by-byte Description of file: table1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 13 F13.5 d BJD [2458905/2458907] Barycentric Julian Date; TDB
15- 19 F5.2 m/s RVel [-5.52/6.43] Barycentric radial velocity
21- 24 F4.2 m/s e_RVel [1.2/1.7] Uncertainty in RV
26- 28 I3 s Texp [727/900] Exposure time in seconds
--------------------------------------------------------------------------------
History:
From electronic version of the journal
References:
Dalba et al. Paper I. 2020AJ....159..241D 2020AJ....159..241D Cat. J/AJ/159/241
Weiss et al. Paper II. 2021AJ....161...56W 2021AJ....161...56W Cat. J/AJ/161/56
Dai et al. Paper III. 2020AJ....160..193D 2020AJ....160..193D
Rubenzahl et al. Paper IV. 2021AJ....161..119R 2021AJ....161..119R This catalog
Scarsdale et al. Paper V. 2021AJ....162..215S 2021AJ....162..215S Cat. J/AJ/162/215
MacDougall et al. Paper VI. 2021AJ....162..265M 2021AJ....162..265M Cat. J/AJ/162/265
Lange et al. Paper VII. 2024AJ....167..282L 2024AJ....167..282L Cat. J/AJ/167/282
Dalba et al. Paper VIII. 2022AJ....163...61D 2022AJ....163...61D Cat. J/AJ/163/61
Lubin et al. Paper IX. 2022AJ....163..101L 2022AJ....163..101L Cat. J/AJ/163/101
Turtelboom et al. Paper XI. 2022AJ....163..293T 2022AJ....163..293T Cat. J/AJ/163/293
Chontos et al. Paper XII. 2022AJ....163..297C 2022AJ....163..297C
MacDougall et al. Paper XIII. 2022AJ....164...97M 2022AJ....164...97M Cat. J/AJ/164/97
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Polanski et al. Paper XX. 2024ApJS..272...32P 2024ApJS..272...32P
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(End) Prepared by [AAS], Coralie Fix [CDS], 21-Apr-2021