J/AJ/167/175 Radial velocity and photometry of TOI-677 (Hu+, 2024)
The PFS View of TOI-677 b: A Spin-Orbit Aligned Warm Jupiter in a Dynamically
Hot System.
Hu Q., Rice M., Wang X.-Y., Wang S., Shporer A., Teske J.K., Yee S.W.,
Butler R.P., Shectman S., Crane J.D., Collins K.A., Collins K.I.
<Astron. J., 167, 175 (2024)>
=2024AJ....167..175H 2024AJ....167..175H
ADC_Keywords: Exoplanets; Stars, dwarfs; Spectra, optical;
Photometry, infrared ; Radial velocities
Keywords: Planetary theory ; Exoplanet tides ; Exoplanet migration ;
Planetary dynamics ; Exoplanets ; Hot Jupiters ; Exoplanet
systems ; Star-planet interactions ; Planetary alignment ;
Exoplanet evolution ; Exoplanet astronomy ; Exoplanet dynamics
Abstract:
TOI-677b is part of an emerging class of "tidally detached" gas giants
(a/R*≳11) that exhibit large orbital eccentricities and yet low
stellar obliquities. Such sources pose a challenge for models of giant
planet formation, which must account for the excitation of high
eccentricities without large changes in the orbital inclination. In
this work, we present a new Rossiter-McLaughlin measurement of the
tidally detached warm Jupiter TOI-677b, obtained using high-precision
radial velocity observations with Magellan's Planet Finder
Spectrograph (PFS). Combined with previously published observations
from the Very Large Telescope's ESPRESSO spectrograph, we derive one
of the most precisely constrained sky-projected spin-orbit angle
measurements to date for an exoplanet. The combined fit offers a
refined set of self-consistent parameters, including a low
sky-projected stellar obliquity of λ=3.2-1.5+1.6deg and a
moderately high eccentricity of e=0.460-0.018+0.019, which further
constrain the puzzling architecture of this system. We examine several
potential scenarios that may have produced the current TOI-677 orbital
configuration, ultimately concluding that TOI-677b most likely had its
eccentricity excited through disk-planet interactions. This system
adds to a growing population of aligned warm Jupiters on eccentric
orbits around hot (Teff>6100K) stars.
Description:
We observed the RM effect across one full transit of TOI-677b from UT
02:19 to 09:24 on 2023 February 10 using PFS on the 6.5m Magellan Clay
telescope. In addition to the transit itself, our observation included
2.5hr of pretransit and 2hr of posttransit baseline observations.
TOI-677 (TIC 20182165) was observed at 2 minute cadence in TESS
Sectors 9, 10, 35, 36, 62, and 63, including 12 transits in total.
We obtained photometry of TOI-677 that was simultaneous with the RM
observation using two 1 m and two 0.4m telescopes within the Las
Cumbres Observatory Global Telescope (LCOGT) network on 2023 February
10. All LCOGT observations were obtained with the Pan-STARRS zs
filter. 12 One of the 1m telescopes did not successfully defocus and
nearly saturated the target star; however, a reasonable light curve
could still be extracted. The second 1m telescope, as well as the two
0.4m telescopes, successfully defocused with no problems.
Objects:
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RA (2000) DE Designation(s) (Period)
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10 14 51.77 -47 09 24.1 TOI-667 = ** GJ 1132A (P=11.2365985d)
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 24 29 PFS radial velocities and uncertainties across a
single transit of TOI-677b
table2.dat 26 80171 *Detrended TESS photometric data for TOI-677
table3.dat 38 1179 *LCO photometric data for the TOI-677b transits
examined in this work
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Note on table2.dat and table3.dat: Relative flux values have been
normalized to a baseline of 1.00
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See also:
I/337 : Gaia DR1 (Gaia Collaboration, 2016)
J/ApJ/700/302 : Relative photometry of XO-3 (Winn+, 2009)
J/A+A/524/A25 : Radial Velocities on 6 exoplanet host stars (Triaud+, 2010)
J/ApJ/757/18 : Radial velocities 16 hot Jupiter host stars (Albrecht+, 2012)
J/A+A/572/A49 : WASP-94AB photom. & radial velocities (Neveu-VanMalle+, 2014)
J/AJ/155/255 : Radial velocity & activity measures of HAT-P-11 (Yee+, 2018)
J/A+A/635/A205 : Ultra-hot Jupiter WASP-121b transits (Bourrier+, 2020)
J/AJ/159/145 : RVs & opt. photometry of the host star TOI-677 (Jordan+, 2020)
J/AJ/164/26 : 102 hot Jupiters isochrone & stellar modeling (Hamer+, 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/163/158 : BRV light curve of XO-3 (Worku+, 2022)
J/AJ/166/266 : Photometry obtained for TOI-2202b (Rice+, 2023)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 11 F11.6 d BJD [9985/9986] Barycentric Julian date, BJD-2450000
13- 19 F7.2 m/s RVel [-102/91] Radial Velocity
21- 24 F4.2 m/s e_RVel [2/4] Uncertainty in RVel
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 12 F12.6 d BJD [8543/10015] Barycentric Julian date, BJD-2450000
14- 20 F7.3 --- Flux [-10.5/6.5] Relative flux, parts per thousand, ppt
22- 26 F5.3 --- e_Flux [0.6/0.9] Uncertainty in flux, ppt
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 11 F11.6 d BJD [9985/9986] Barycentric Julian date, BJD-2450000
13- 19 F7.3 --- Flux [-21/15] Relative flux, parts per thousand, ppt
21- 25 F5.3 --- e_Flux [0.6/9] Uncertainty in flux, ppt
27- 38 A12 --- Instr Description of Instrument (1)
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Note (1): The two 0.4m LCO telescopes and the two 1m LCO telescopes
are distinguished with the markers (1) and (2).
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History:
From electronic version of the journal
(End) Prepared by [AAS], Coralie Fix [CDS], 29-May-2024