J/A+A/712/A157 Radial velocities of TOI-2147 and TOI-6019 stars (Thomas+, 2026)
TOI-2147 b and TOI-6019 br: Two eccentric Warm Jupiters detected and
characterized with TESS and MaHPS.
Thomas L., Nielsen L.D., Kellermann H., Prinoth B., Liu Y., Ozden E.Z.,
Riffeser A., Goessl C., Grupp F., de Leon J., Collins K.A., Bieryla A.,
Acuna-Aguirre L., Baka K., Busmann M., Ciardi D.R., Clark C.A., Ehrhardt J.,
Everett M.E., Fukui A., Harre J.-V., Isogai K., Li Y., Murgas F., Narita N.,
Palle E., Parviainen H., Pippert J.-N., Ries C., Safonov B.S., Schaefer T.,
Schmidt M., Schwarz R.P., Schoeller L., Srdoc G., Strakhov I.A., Taylor S.,
Zhou W., Zoeller R.
<Astron. Astrophys. 712, A157 (2026)>
=2026A&A...712A.157T 2026A&A...712A.157T (SIMBAD/NED BibCode)
ADC_Keywords: Radial velocities ; Spectroscopy ; Optical ; Exoplanets
Keywords: techniques: photometric - techniques: radial velocities -
planets and satellites: detection -
planets and satellites: gaseous planets - planetary systems
Abstract:
The population of Jupiter-sized exoplanets with orbital periods
between 10 and 200 days (WJs) exhibits a broad range of orbital
eccentricities and system architectures, suggesting a diversity of
formation and migration pathways. In this work, we report the
detection and characterization of two new eccentric WJs, TOI-2147 b
and TOI-6019 b, initially identified as planet candidates by the
Transiting Exoplanet Survey Satellite (TESS). We combined TESS
photometry with ground-based follow-up observations, including
multiband photometry from LCOGT and MuSCAT2, high-angular-resolution
speckle imaging, and high-precision radial velocity measurements from
the high-resolution Manfred Hirt Planet Finder Spectrograph (MaHPS).
Using these data, we were able to confirm the planetary nature of both
candidates. TOI-2147 b has a radius of 10.5±0.3R⊕ and a mass
of 116±22M⊕. It orbits its slightly metal-poor
([Fe/H]=-0.29-0.08+0.07) G-type host star on an eccentric orbit
(e=0.29±0.07) with a period of 26.2 days. TOI-6019 b has a radius of
12.3±0.3R⊕ and a mass of 149±15M⊕. It orbits a
slightly evolved, solar-metallicity G-type sub-giant with a period of
14.5 days on a significantly eccentric orbit (e=0.48-0.04+0.05).
Both planets have bulk densities below that of Jupiter, indicating
mildly inflated radii, with interior structure modeling using GASTLI.
This suggests that tidal heating from the nonzero eccentricities
likely contributes to this inflation and disfavors large atmospheric
metal enrichment. No significant signals from additional companions
were detected in the radial velocity time series or transit timing
variations. Together with the elevated eccentricities, this is
consistent with a high-eccentricity migration origin for both systems.
Description:
We report the detection and characterization of two new eccentric warm
Jupiters, TOI-2147 b and TOI-6019 b, identified as planet candidates
by TESS and confirmed with high-precision radial velocities from MaHPS
at the Wendelstein Observatory. TOI-2147 b has a radius of
10.5±0.3R⊕, a mass of 116±22M⊕, and orbits on an
eccentric orbit (e=0.29±0.07) with a period of 26.2 days. TOI-6019 b
has a radius of 12.3±0.3R⊕, a mass of 149±15M⊕,
and orbits a mildly evolved sub-giant with a period of 14.5 days on a
significantly eccentric orbit (e=0.48+0.05-0.04). Interior
structure modelling with GASTLI indicates tidal heating likely
contributes to the mildly inflated radii of both planets.
We present respectively for TOI-2147 and TOI-6019 in table5.dat and
table6.dat, radial velocities time series measurements obtained with
the high-resolution echelle spectrograph Manfred Hirt Planet MaHPS at
the 2m telescope of Wendelstein Observatory.
Objects:
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RA (2000) DE Designation(s)
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10 22 34.15 +83 05 01.3 TOI-2147 = 2MASS J10223416+8305013
23 40 21.93 +35 56 27.0 TOI-6019 = 2MASS J23402193+3556271
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table5.dat 41 136 Radial velocities of TOI-2147
table6.dat 41 93 Radial velocities of TOI-6019
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Byte-by-byte Description of file: table5.dat table6.dat
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Bytes Format Units Label Explanations
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1- 16 F16.8 d BJD Barycentric Julian Date in Barycentric Dynamical
Time TDB standard (BJD_TDB)
18- 26 F9.4 m/s RV Radial velocity extracted using the GAMSE and
MARMOT pipelines (RV)
28- 35 F8.4 m/s e_RV Uncertainty on radial velocity (e_RV)
37- 41 A5 --- Inst Instrument name which is always MaHPS as Manfred
Hirt Planet Spectrograph high-resolution echelle
spectrograph at the 2m telescope of Wendelstein
Observatory (Inst)
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Acknowledgements:
Luis Thomas, lthomas(at)usm.lmu.de
License: CC-BY-4.0
(End) Luis Thomas [MPE], Luc Trabelsi [CDS] 01-Jun-2026