585 citations · 4.3k across the 74 of their papers we have counts for
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The TOI-1117 Multi-planetary System: 3 sub-Neptunes, 1 in both the Neptunian Desert and Radius Valley
Isobel S. Lockley, David J. Armstrong, Jorge Fernández Fernández +33
We present the discovery of three sub-Neptune planets around TOI-1117, a Sun-like star with mass , radius , age Gyr and ef…
The NCORES Program: Precise planetary masses, null results, and insight into the planet mass distribution near the radius gap
David J. Armstrong, Ares Osborn, Remo Burn +39
NCORES was a large observing program on the ESO HARPS spectrograph, dedicated to measuring the masses of Neptune-like and smaller transiting planets discovered by the TESS satellit…
KOBE-1: The first planetary system from the KOBE survey. Two planets likely residing in the sub-Neptune mass regime around a late K-dwarf
O. Balsalobre-Ruza, J. Lillo-Box, A. M. Silva +35
K-dwarf stars are promising targets in the exploration of potentially habitable planets. Their properties, falling between G and M dwarfs, provide an optimal trade-off between the…
A low-mass sub-Neptune planet transiting the bright active star HD 73344
S. Sulis, I. J. M. Crossfield, A. Santerne +33
Context. Planets with radii of between 2-4 RE closely orbiting solar-type stars are of significant importance for studying the transition from rocky to giant planets. Aims. Our goa…
Density discrepancy between transit-timing variations and radial velocity: Insights from the host star composition
V. Adibekyan, S. G. Sousa, S. C. C. Barros +5
The determination of planetary densities from the masses derived with the radial velocity (RV) and transit-timing variation (TTV) methods reveals discrepancies. Specifically, plane…
Planets around evolved intermediate-mass stars III. Planet candidates and long-term activity signals in six open clusters
E. Delgado Mena, J. Gomes da Silva, J. P. Faria +6
[abridged]The aim of this work is to search for planets around evolved stars, with a special focus on stars more massive than 2\,M in light of previous findings that show a…
A compact multi-planet system transiting HIP 29442 (TOI-469) discovered by TESS and ESPRESSO. Radial velocities lead to the detection of transits with low signal-to-noise ratio
M. Damasso, J. Rodrigues, A. Castro-González +52
We followed-up with ESPRESSO the K0V star HIP 29442 (TOI-469), already known to host a validated sub-Neptune companion TOI-469.01. We aim to verify the planetary nature of TOI-469.…
TOI-908: a planet at the edge of the Neptune desert transiting a G-type star
Faith Hawthorn, Daniel Bayliss, David J. Armstrong +36
We present the discovery of an exoplanet transiting TOI-908 (TIC-350153977) using data from TESS sectors 1, 12, 13, 27, 28 and 39. TOI-908 is a T = 10.7 mag G-dwarf ( = 56…
TOI-2498 b: A hot bloated super-Neptune within the Neptune desert
Ginger Frame, David J. Armstrong, Heather M. Cegla +39
We present the discovery and confirmation of a transiting hot, bloated Super-Neptune using photometry from TESS and LCOGT and radial velocity measurements from HARPS. The host star…
The young mini-Neptune HD 207496b that is either a naked core or on the verge of becoming one
S. C. C. Barros, O. D. S. Demangeon, D. J. Armstrong +40
We report the discovery and characterisation of the transiting mini-Neptune HD~207496~b (TOI-1099) as part of a large programme that aims to characterise naked core planets. We obt…
Composition of super-Earths, super-Mercuries, and their host stars
V. Adibekyan, N. C. Santos, C. Dorn +11
Because of their common origin, it was assumed that the composition of planet building blocks should, to a first order, correlate with stellar atmospheric composition, especially f…
The HD 137496 system: A dense, hot super-Mercury and a cold Jupiter
T. Azevedo Silva, O. D. S. Demangeon, S. C. C. Barros +28
Most of the currently known planets are small worlds with radii between that of the Earth and that of Neptune. The characterization of planets in this regime shows a large diversit…
HD207897 b: A dense sub-Neptune transiting a nearby and bright K-type star
N. Heidari, I. Boisse, J. Orell-Mique +90
We present the discovery and characterization of a transiting sub-Neptune orbiting with a 16.20 day period around a nearby (28 pc) and bright(V=8.37) K0V star HD207897 (TOI-1611).…
TOI-431/HIP 26013: a super-Earth and a sub-Neptune transiting a bright, early K dwarf, with a third RV planet
Ares Osborn, David J. Armstrong, Bryson Cale +125
We present the bright (V), multi-planet system TOI-431, characterised with photometry and radial velocities. We estimate the stellar rotation period to be $30.5 \pm…
TOI-220 : a warm sub-Neptune discovered by TESS
S. Hoyer, D. Gandolfi, D. J. Armstrong +77
In this paper we report the discovery of TOI-220 , a new sub-Neptune detected by the Transiting Exoplanet Survey Satellite (TESS) and confirmed by radial velocity follow-up obse…
K2-111: an old system with two planets in near-resonance
A. Mortier, M. R. Zapatero Osorio, L. Malavolta +64
This paper reports on the detailed characterisation of the K2-111 planetary system with K2, WASP, and ASAS-SN photometry as well as high-resolution spectroscopic data from HARPS-N…
A remnant planetary core in the hot-Neptune desert
David J. Armstrong, Théo A. Lopez, Vardan Adibekyan +91
The interiors of giant planets remain poorly understood. Even for the planets in the Solar System, difficulties in observation lead to large uncertainties in the properties of plan…
An extremely low-density and temperate giant exoplanet
A. Santerne, L. Malavolta, M. R. Kosiarek +68
Transiting extrasolar planets are key objects in the study of the formation, migration, and evolution of planetary systems. In particular, the exploration of the atmospheres of gia…
HD219666b: A hot-Neptune from TESS Sector 1
M. Esposito, D. J. Armstrong, D. Gandolfi +73
We report on the confirmation and mass determination of a transiting planet orbiting the old and inactive G7 dwarf star HD219666 (Mstar = 0.92 +/- 0.03 MSun, Rstar = 1.03 +/- 0.03…
Can we really detect planets around evolved massive stars?
E. Delgado Mena
The discovery of planets around massive stars is important for understanding how planet formation and evolution is conditioned by different stellar environments. However, current p…
K2-265 b: A Transiting Rocky Super-Earth
K. W. F. Lam, A. Santerne, S. G. Sousa +34
We report the discovery of the super-Earth K2-265 b detected with K2 photometry. The planet orbits a bright (V_mag = 11.1) star of spectral type G8V with a period of 2.37 days. We…
Planets around evolved intermediate-mass stars in open clusters II. Are there really planets around IC4651No9122, NGC2423No3 and NGC4349No127?
E. Delgado Mena, C. Lovis, N. C. Santos +10
(shorter version)The aim of this work is to search for planets around intermediate-mass stars in open clusters by using RV data obtained with HARPS from an extensive survey with mo…
Chemical abundances of neutron capture elements in exoplanet-hosting stars
E. Delgado Mena, V. Zh. Adibekyan, P. Figueira +7
To understand the formation and composition of planetary systems it is important to study their host stars composition since both are formed in the same stellar nebula. In this wor…
Precise masses for the transiting planetary system HD 106315 with HARPS
S. C. C. Barros, H. Gosselin, J. Lillo-Box +45
The multi-planetary system HD 106315 was recently found in K2 data . The planets have periods of and days, and radii of a…