J/AJ/166/266 Photometry obtained for TOI-2202b (Rice+, 2023)
Evidence for Low-level Dynamical Excitation in Near-resonant Exoplanet Systems.
Rice M., Wang X.-Y., Wang S., Shporer A., Barkaoui K., Brahm R.,
Collins K.A., Jordan A., Lowson N., Butler R.P., Crane J.D., Shectman S.,
Teske J.K., Osip D., Collins K.I., Murgas F., Boyle G., Pozuelos F.J.,
Timmermans M., Jehin E., Gillon M.
<Astron. J., 166, 266 (2023)>
=2023AJ....166..266R 2023AJ....166..266R
ADC_Keywords: Exoplanets; Photometry, infrared; Stars, dwarfs
Keywords: Exoplanet astronomy ; Exoplanet dynamics ; Exoplanet migration ;
Exoplanet formation ; Exoplanet evolution ; Orbital resonances ;
Exoplanet systems ; Exoplanets ; Planetary alignment ; Orbital
evolution
Abstract:
The geometries of near-resonant planetary systems offer a relatively
pristine window into the initial conditions of exoplanet systems.
Given that near-resonant systems have likely experienced minimal
dynamical disruptions, the spin-orbit orientations of these systems
inform the typical outcomes of quiescent planet formation, as well as
the primordial stellar obliquity distribution. However, few
measurements have been made to constrain the spin- orbit orientations
of near-resonant systems. We present a Rossiter-McLaughlin measurement
of the near-resonant warm Jupiter TOI-2202b, obtained using the
Carnegie Planet Finder Spectrograph on the 6.5m Magellan Clay
Telescope. This is the eighth result from the Stellar Obliquities in
Long-period Exoplanet Systems survey. We derive a sky-projected 2D
spin-orbit angle λ=26-15+12 and a 3D spin-orbit angle
ψ=31-11+13deg , finding that TOI-2202 b-the most massive near-
resonant exoplanet with a 3D spin-orbit constraint to date-likely
deviates from exact alignment with the host star's equator.
Incorporating the full census of spin-orbit measurements for
near-resonant systems, we demonstrate that the current set of
near-resonant systems with period ratios P2/P1≲4 is generally
consistent with a quiescent formation pathway, with some room for
low-level (≲20°) protoplanetary disk misalignments or post-disk-
dispersal spin-orbit excitation. Our result constitutes the first
population- wide analysis of spin-orbit geometries for near-resonant
planetary systems.
Description:
Our team measured the ingress of TOI-2202b's transit on UT 2022 August
24 using one of the 0.7m Minerva-Australis telescopes located at the
University of Southern Queensland's Mount Kent Observatory. The
telescope is equipped with a 2000x2000pixel Andor CCD with pixel scale
0.608", and we used a 15pixel radius (9.12") aperture to extract the
photometry.
We measured one partial transit of TOI-2202b on UT 2022 September 9
using the Las Cumbres Observatory Global Network (LCOGT) Siding Spring
Observatory (SSO) 0.4 and 1m telescopes, in New South Wales in
Australia. Observations were taken in the Sloan i' band with 170s
exposures on the 0.4m telescope and 43s exposures on the 1m telescope.
We also measured two transit ingress events for TOI-2202b on UT 2022
October 10 and 2022 October 10, as well as one full transit on UT 2022
November 4, using the LCOGT Cerro Tololo Inter-American Observatory
(CTIO) 0.4m telescope located 80km east of La Serena, Chile. The UT
2022 October 10 ingress was simultaneously observed using the LCOGT
CTIO 1m telescope. Observations were taken in the Sloan i' band, with
170s exposures for the 0.4m telescope observations and 43s exposures
for the 1m telescope observations.
We measured one transit egress event for TOI-2202b on UT 2022 October
11 using the TRAPPIST-South 0.6m robotic telescope at La Silla
Observatory in the Atacama Desert of Chile. Continuous 30s
observations were taken with the Astrodon "i+z" filter. The
TRAPPIST-South observing sequence spanned 2.16hr prior to the transit
ingress, as well as 1.76 in-transit hours of observations.
Our team measured two full transits of TOI-2202b on UT 2022 October 23
and UT 2022 November 4 using the station of the Observatoire Moana
located in El Sauce Observatory in Chile. Observations were taken in
the Sloan r band with continuous 100s exposures.
Objects:
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RA (2000) DE Designation(s)
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03 24 54.86 -73 57 27.2 TOI-2202 = 2MASS J03245487-7357273
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
fig1.dat 76 1890 Photometry obtained from the seven telescopes used
within this work
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See also:
II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
II/328 : AllWISE Data Release (Cutri+ 2013)
J/ApJS/197/8 : Kepler candidate multiple transiting planets (Lissauer+, 2011)
J/A+A/555/A92 : Transit timing variations on Qatar-1 (von Essen+, 2013)
J/ApJ/790/146 : Planets in Kepler's multi-transiting systems (Fabrycky+, 2014)
J/A+A/577/A109 : Transit times of Qatar-1b (Maciejewski+, 2015)
J/ApJS/225/9 : Kepler TTVs. IX. Full long-cadence data set (Holczer+, 2016)
J/AJ/151/17 : Eight transiting light curves of WASP-43b (Jiang+, 2016)
J/AJ/155/106 : Doppler velocity measurements of GJ 876 (Millholland+, 2018)
J/ApJ/888/L5 : Transits, occultation times and RVs of WASP-12b (Yee+, 2020)
J/A+A/649/A26 : TOI-178 six transiting planets (Leleu+, 2021)
J/AJ/161/72 : 180 Transit and occultation times for WASP-12b (Turner+, 2021)
J/AJ/162/89 : HIRES radial velocity follow up for Kepler-129 (Zhang+, 2021)
J/ApJS/259/62 : TESS transit timing of hot Jupiters (Ivshina+, 2022)
J/AJ/163/247 : HIRES, PEPSI & TRES Vel of V1298 Tau (Johnson+, 2022)
J/AJ/164/104 : NEID and HIRES radial velocity of TOI-1478 (Rice+, 2022)
J/ApJ/926/L8 : Spectroscopic and transit obs. of WASP-148 (Wang+, 2022)
J/AJ/163/175 : WASP-12 individual transit fit with TESS (Wong+, 2022)
J/AJ/165/33 : HIRES TOI-1136s planets & planet b RVels (Dai+, 2023)
Byte-by-byte Description of file: fig1.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- Set [1/10] Observation subset; one for each LC
4- 18 F15.7 --- BJD [2459816/2459888] Barycentric Julian Date at TDB
20- 28 F9.7 --- Flux [0.95/1.04] Normalized Flux
30- 38 F9.7 --- e_Flux [0/0.5] Uncertainty in Flux
40- 53 A14 --- Band Filter/Passband used; Clear, Sloani or ip
55- 76 A22 --- Tel Observatory/Telescope used; El SAuce, LCO,
MINERVA or TRAPPIST
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History:
From electronic version of the journal
(End) Prepared by [AAS], Coralie fix [CDS], 15-Apr-2024