J/AJ/168/135 The TESS-Keck survey. XXII. TOI-1437 (Pidhorodetska+, 2024)
The TESS-Keck Survey.
XXII. A sub-Neptune orbiting TOI-1437.
Pidhorodetska D., Gilbert E.A., Kane S.R., Barclay T., Polanski A.S.,
Hill M.L., Stassun K.G., Giacalone S., Ciardi D.R., Boyle A.W.,
Howell S.B., Lillo-Box J., MacDougall M.G., Fetherolf T., Batalha N.M.,
Crossfield I.J.M., Dressing C., Fulton B., Howard A.W., Huber D.,
Isaacson H., Petigura E.A., Robertson P., Weiss L.M., Angelo I., Beard C.,
Behmard A., Blunt S., Brinkman C.L., Chontos A., Dai F., Dalba P.A.,
Holcomb R., Lubin J., Mayo A.W., Murphy J.M.A., Rice M., Rubenzahl R.,
Scarsdale N., Turtelboom E.V., Tyler D., van Zandt J., Schwieterman E.W.
<Astron. J. 168, 135 (2024)>
=2024AJ....168..135P 2024AJ....168..135P (SIMBAD/NED BibCode)
ADC_Keywords: Stars, double and multiple; Exoplanets; Radial velocities;
Spectra, optical; Infrared sources; Surveys
Keywords: Exoplanets; Radial velocity; Mini Neptunes
Abstract:
Exoplanet discoveries have revealed a dramatic diversity of planet
sizes across a vast array of orbital architectures. Sub-Neptunes are
of particular interest; due to their absence in our own solar system,
we rely on demographics of exoplanets to better understand their bulk
composition and formation scenarios. Here, we present the discovery
and characterization of TOI-1437 b, a sub-Neptune with a 18.84 day
orbit around a near-solar analog (M*=1.10±0.10M☉,
R*=1.17±0.12R☉). The planet was detected using photometric
data from the Transiting Exoplanet Survey Satellite (TESS) mission and
radial velocity (RV) follow-up observations were carried out as a part
of the TESS-Keck Survey using both the HIRES instrument at Keck
Observatory and the Levy Spectrograph on the Automated Planet Finder
telescope. A combined analysis of these data reveal a planet radius of
Rp=2.24±0.23R⊕ and a mass measurement of
Mp=9.6±3.9M⊕). TOI-1437 b is one of few (∼50) known
transiting sub-Neptunes orbiting a solar-mass star that has a RV mass
measurement. As the formation pathway of these worlds remains an
unanswered question, the precise mass characterization of TOI-1437 b
may provide further insight into this class of planet.
Description:
TOI-1437 lies within the northern Continuous Viewing Zone, which has
been observed exhaustively by TESS over its full mission lifetime.
TESS observed TOI-1437 in year 2 of operations at a 2 minute cadence
during Sectors 14-26. TOI-1437 was also observed in Sectors 40, 41,
and 47-60, at both 20s and 2 minute cadences. TOI-1437 will be
reobserved by TESS in upcoming Sectors 73-83. See Section 2.1.
TOI-1437 was observed over 88 nights with the HIRES instrument at the
Keck Observatory between UT 2019 November 28 and UT 2023 June 26.
HIRES uses the iodine technique, where the wavelength range for RV
measurements is 5000-6300Å. Our HIRES RVs have a median binned
uncertainty of 1.49m/s and a median exposure time of 329s.
In addition to the Keck/HIRES observations, we collected 106 spectra
of TOI-1437 with the Levy Spectrograph on the Automated Planet Finder
(APF) telescope between UT 2019 December 13 and 2022 July 30. The APF
is a 2.4m telescope located at the Mt. Hamilton station of UCO/Lick
Observatory. APF uses the same iodine technique as HIRES, taking RV
measurements between 5000 and 6300Å. Our APF RVs have a median
binned uncertainty of 5.22m/s and a median exposure time of 1800s.
See Section 2.2.
We observed TOI-1437 with high-resolution near-infrared adaptive
optics (AO) imaging at Palomar and Lick Observatories and in the
optical with lucky imaging at Calar Alto and speckle imaging at Gemini
North. See Section 2.3.
Objects:
----------------------------------------------------------
RA (ICRS) DE Designation(s)
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17 04 33.27 +56 50 33.4 TOI-1437 = HD 154840
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File Summary:
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FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 46 194 Radial velocity measurements
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See also:
IV/34 : K2 Ecliptic Plane Input Catalog (EPIC) (Huber+, 2017)
I/356 : Gaia DR3 Part 2. Extra-galactic (Gaia Collaboration, 2022)
I/357 : Gaia DR3 Part 3. Non-single stars (Gaia Collaboration, 2022)
I/358 : Gaia DR3 Part 4. Variability (Gaia Collaboration, 2022)
I/359 : Gaia DR3 Part 5. Solar System (Gaia Collaboration, 2022)
I/360 : Gaia DR3 Part 6. Performance verification (Gaia Collaboration, 2022)
J/other/A+ARV/18.67 : Accurate masses and radii of normal stars (Torres+, 2010)
J/ApJ/725/875 : Chromospheric activity for CPS stars (Isaacson+, 2010)
J/AJ/142/19 : Speckle observations of KOI (Howell+, 2011)
J/A+A/546/A10 : Mult. in transiting planet-host stars (Lillo-Box+, 2012)
J/ApJ/767/95 : Stellar parameters of smallest KIC stars (Dressing+, 2013)
J/A+A/566/A103 : Kepler planet host candidates imaging (Lillo-Box+, 2014)
J/ApJ/809/8 : Terrestrial planet occurrence rates for KOIs (Burke+, 2015)
J/ApJ/825/19 : Mass-radius relationship for planets, Rp<4 (Wolfgang+, 2016)
J/AJ/152/180 : Bolometric fluxes of EBs in Tycho-2 (Stassun+, 2016)
J/AJ/153/71 : Kepler follow-up observation program. I. (Furlan+, 2017)
J/AJ/153/136 : Planets & host stars with Gaia parallaxes (Stassun+, 2017)
J/AJ/154/109 : California-Kepler Survey (CKS). III. Radii (Fulton+, 2017)
J/AJ/158/109 : Occurrence rates of planets orbiting FGK stars (Hsu+, 2019)
J/AJ/159/19 : SOAR TESS survey. I. (Ziegler+, 2020)
J/ApJS/250/20 : Rot. periods in TESS objects of interest (TOIs) (Canto+, 2020)
J/ApJ/898/47 : Fe & radii from blended sp. of simulated bin. (Furlan+, 2020)
J/AN/341/996 : Stellar companions of (C)TOIs (Mugrauer+, 2020)
J/A+A/639/A35 : RV jitter & photometric var. correlation (Hojjatpanah+, 2020)
J/ApJS/254/39 : Exoplanet candidates from TESS first 2yr obs (Guerrero+, 2021)
J/AJ/162/75 : Speckle obs. TESS exoplanet host stars. II. (Lester+, 2021)
J/AJ/166/33 : The TESS-Keck Survey. XV. 108 TESS Planets (MacDougall+, 2023)
J/AJ/166/271 : FEROS spectra for 3 giants exoplanets (Eberhardt+, 2023)
J/AJ/167/282 : TESS/HIRES RVel follow up of TOI-1824 (Lange+, 2024)
J/A+A/686/A232 : AstraLux-TESS planet candidates (Lillo-Box+, 2024)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 14 F14.6 d BJD Barycentric Julian Date; TDB
16- 21 F6.2 m/s RVel [-48/31] Relative radial velocity
23- 27 F5.2 m/s e_RVel [1.2/19] Uncertainty in RVel
29- 34 F6.4 --- SHK [0.038/0.31] The SHK Value
36- 40 F5.3 --- e_SHK [0.001/0.002] Uncertainty in SHK
42- 48 A7 --- Inst Instrument (1)
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Note (1): Instrument as follows:
APF = the Levy Spectrograph on the Automated Planet Finder telescope
(107 occurrences)
HIRES = the High Resolution Echelle Spectrometer instrument at the
Keck Observatory (87 occurrences)
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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 Cat. J/AJ/161/119
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
Van Zandt et al. Paper XIV. 2023AJ....165...60V 2023AJ....165...60V Cat. J/AJ/165/60
MacDougall et al. Paper XV. 2023AJ....166...33M 2023AJ....166...33M Cat. J/AJ/166/33
Murphy et al. Paper XVI. 2023AJ....166..153M 2023AJ....166..153M Cat. J/AJ/166/153
Beard et al. Paper XVII. 2024AJ....167...70B 2024AJ....167...70B Cat. J/AJ/167/70
Desai et al. Paper XVIII. 2024AJ....167..194D 2024AJ....167..194D Cat. J/AJ/167/194
Hill et al. Paper XIX. 2024AJ....167..151H 2024AJ....167..151H
Polanski et al. Paper XX. 2024ApJS..272...32P 2024ApJS..272...32P
Pidhorodetska et al. Paper XXII. 2024AJ....168..135P 2024AJ....168..135P This catalog
(End) Prepared by [AAS], Emmanuelle Perret [CDS] 12-Mar-2025