J/A+A/675/A115 TOI-1130 radial velocities (Korth+, 2023)
TOI-1130: A photodynamical analysis of a hot Jupiter in resonance with an
inner low-mass planet.
Korth J., Gandolfi D., Subjak J., Howard S., Ataiee S., Collins K.A.,
Quinn S.N., Mustill A.J., Guillot T., Lodieu N., Smith A.M.S., Esposito M.,
Rodler F., Muresan A., Abe L., Albrecht S.H., Alqasim A., Barkaoui K.,
Beck P.G., Burke C.J., Butler R.P., Conti D.M., Collins K.I., Crane J.D.,
Dai F., Deeg H.J., Evans P., Grziwa S., Hatzes A.P., Hirano T., Horne K.,
Huang C.X., Jenkins J.M., Kabath P., Kielkopf J.F., Knudstrup E.,
Latham D.W., Livingston J., Luque R., Mathur S., Murgas F., Osborne H.L.M.,
Palle E., Persson C.M., Rodriguez J.E., Rose M., Rowden P., Schwarz R.P.,
Seager S., Serrano L.M., Sha L., Shectman S.A., Shporer A., Srdoc G.,
Stockdale C., Tan T.-G., Teske J.K., Van Eylen V., Vanderburg A.,
Vanderspek R., Wang S.X., Winn J.N.
<Astron. Astrophys., 675, A115 (2023)>
=2023A&A...675A.115K 2023A&A...675A.115K (SIMBAD/NED BibCode)
ADC_Keywords: Stars, double and multiple ; Exoplanets ; Radial velocities ;
Optical
Keywords: planetary systems - planets and satellites: individual: TOI-1130 -
techniques: photometric - techniques: radial velocities -
techniques: radial velocities
Abstract:
The TOI-1130 is a known planetary system around a K-dwarf consisting
of a gas giant planet, TOI-1130 c on an 8.4-day orbit that is
accompanied by an inner Neptune-sized planet, TOI-1130 b, with an
orbital period of 4.1 days. We collected precise radial velocity (RV)
measurements of TOI-1130 with the HARPS and PFS spectrographs as part
of our ongoing RV follow-up program. We performed a photodynamical
modeling of the HARPS and PFS RVs, along with transit photometry from
the Transiting Exoplanet Survey Satellite (TESS) and the TESS
Follow-up Observing Program (TFOP). We determined the planet masses
and radii of TOI-1130 b and TOI-1130 c to be Mb=19.28±0.97MEarth
and Rb=3.56±0.13REarth, and Mc=325.59±5.59MEarth and
Rc=13.32-1.41+1.55^R☉, respectively. We have
spectroscopically confirmed the existence of TOI-1130 b, which had
previously only been validated. We find that the two planets have
orbits with small eccentricities in a 2:1 resonant configuration. This
is the first known system with a hot Jupiter and an inner lower mass
planet locked in a mean-motion resonance. TOI-1130 belongs to the
small, yet growing population of hot Jupiters with an inner low-mass
planet that poses a challenge to the pathway scenario for hot Jupiter
formation. We also detected a linear RV trend that is possibly due to
the presence of an outer massive companion.
Description:
We acquired 49 high-resolution (R∼115000) spectra using the High
Accuracy Radial velocity Planet Searcher (HARPS) spectrograph mounted
at the 3.6-m telescope of the European Southern Observatory (ESO), La
Silla, Chile. The observations were performed between 2019 Sep. 18 and
19 as part of ESO programs 1102.C-0923 (PI: Gandolfi), and 60.A-9709
(technical night). In total, we observed the target on 41 individual
nights with exposure times of 35 minutes.
We also observed TOI-1130 with the Planet Finder Spectrograph (PFS),
which is mounted on the 6.5-m Magellan II (Clay) Telescope at Las
Campanas Observatory in Chile. PFS is a slit-fed echelle spectrograph
with a wavelength coverage of 3910-7340Å. We used a 0.3" slit and
1x2 binning, which yields a resolving power of R∼133000. Wavelength
calibration is achieved via an iodine gas cell, which also allows the
characterization of the instrumental profile. We obtained 20 spectra,
observed through iodine, between 2019 Sep. 12 and Oct. 12, leading to
six individual observation nights with typical exposure times of 20
minutes for each exposure.
Objects:
----------------------------------------------------
RA (2000) DE Designation(s)
----------------------------------------------------
19 05 30.22 -41 26 15.0 TOI-1130 = TIC 254113311
----------------------------------------------------
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
tablea1.dat 69 49 Radial velocity measurements and spectroscopic
activity indicators for TOI-1130
from HARPS spectra
tablea2.dat 61 20 Radial velocity measurements and spectroscopic
activity indicators for TOI-1130
from PFS spectra
--------------------------------------------------------------------------------
Byte-by-byte Description of file: tablea1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 11 F11.6 d BJD Baricentric Julian Date, TDB (BJD-2457000)
14- 21 F8.2 m/s RV Radial velocity
24- 27 F4.2 m/s e_RV Radial velocity error
30- 34 F5.2 m/s BIS Bissector span of the cross-correlation function
37- 43 F7.2 m/s FWHM FWHM of the cross-correlation function
46- 50 F5.3 --- Sindex Mont-Wilson S index
53- 57 F5.3 --- e_Sindex Mont-Wilson S index error
60- 63 F4.1 --- S/N Signal-to-noise ratio at 550nm
66- 69 I4 s texp Exposure time
--------------------------------------------------------------------------------
Byte-by-byte Description of file: tablea2.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 11 F11.6 d BJD Baricentric Julian Dare, TDB (BJD-2457000)
14- 19 F6.2 m/s RV Radial velocity
22- 25 F4.2 m/s e_RV Radial velocity error
28- 32 F5.3 --- Sindex Mont-Wilson S index (1)
35- 39 F5.3 --- e_Sindex Mont-Wilson S index error (1)
42- 47 F6.4 --- Ha Hα-index (1)
50- 55 F6.4 --- e_Ha Hα-index error (1)
58- 61 I4 s texp Exposure time
--------------------------------------------------------------------------------
Note (1): A 5% fractional uncertainty is assumed for the S-index and
the Hα-index.
--------------------------------------------------------------------------------
History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 02-Nov-2023