174 citations · 898 across the 26 of their papers we have counts for
26 papers
An M dwarf accompanied by a close-in giant orbiter with SPECULOOS
Amaury H. M. J. Triaud, Georgina Dransfield, Taiki Kagetani +40
In the last decade, a dozen close-in giant planets have been discovered orbiting stars with spectral types ranging from M0 to M4, a mystery since known formation pathways do not pr…
TOI-2084 b and TOI-4184 b: two new sub-Neptunes around M dwarf stars
K. Barkaoui, M. Timmermans, A. Soubkiou +67
We present the discovery and validation of two TESS exoplanets orbiting nearby M dwarfs: TOI-2084b, and TOI-4184b. We characterized the host stars by combining spectra from Shane/K…
Continuous Ultraviolet to Blue-Green Astrocomb
Yuk Shan Cheng, Kamalesh Dadi, Toby Mitchell +6
The characterization of Earth-like exoplanets and precision tests of cosmological models using next-generation telescopes such as the ELT will demand precise calibration of astroph…
A super-Earth and a mini-Neptune near the 2:1 MMR straddling the radius valley around the nearby mid-M dwarf TOI-2096
F. J. Pozuelos, M. Timmermans, B. V. Rackham +72
Several planetary formation models have been proposed to explain the observed abundance and variety of compositions of super-Earths and mini-Neptunes. In this context, multitransit…
Precise near-infrared photometry, accounting for precipitable water vapour at SPECULOOS Southern Observatory
Peter P. Pedersen, C. A. Murray, D. Queloz +20
The variability induced by precipitable water vapour (PWV) can heavily affect the accuracy of time-series photometric measurements gathered from the ground, especially in the near-…
Two temperate super-Earths transiting a nearby late-type M dwarf
L. Delrez, C. A. Murray, F. J. Pozuelos +82
In the age of JWST, temperate terrestrial exoplanets transiting nearby late-type M dwarfs provide unique opportunities for characterising their atmospheres, as well as searching fo…
ABORAS: polarimetric, 10cm/s RV observations of the Sun as a star
Casper Farret Jentink, Annelies Mortier, Frans Snik +4
We present a description of A dual-Beam pOlarimetric Robotic Aperture for the Sun (ABORAS), to serve as a Solar input with a dedicated Stokes V polarimeter for the HARPS3 high-reso…
A Study of Flares in the Ultra-Cool Regime from SPECULOOS-South
C. A. Murray, D. Queloz, M. Gillon +22
We present a study of photometric flares on 154 low-mass () objects observed by the SPECULOOS-South Observatory from 1st June 2018 to 23rd March 2020.…
TESS discovery of a sub-Neptune orbiting a mid-M dwarf TOI-2136
Tianjun Gan, Abderahmane Soubkiou, Sharon X. Wang +60
We present the discovery of TOI-2136b, a sub-Neptune planet transiting every 7.85 days a nearby M4.5V-type star, identified through photometric measurements from the TESS mission.…
NGTS clusters survey -- III: A low-mass eclipsing binary in the Blanco 1 open cluster spanning the fully convective boundary
Gareth D. Smith, Edward Gillen, Didier Queloz +27
We present the discovery and characterisation of an eclipsing binary identified by the Next Generation Transit Survey in the 115 Myr old Blanco 1 open cluster. NGTS J0002-29…
Extreme Precision Radial Velocity Working Group Final Report
Jonathan Crass, B. Scott Gaudi, Stephanie Leifer +33
Precise mass measurements of exoplanets discovered by the direct imaging or transit technique are required to determine planet bulk properties and potential habitability. Furthermo…
A transit timing variation observed for the long-period extremely low density exoplanet HIP 41378f
Edward M. Bryant, Daniel Bayliss, Alexandre Santerne +47
HIP 41378 f is a temperate planet with period of 542.08 days and an extremely low density of g cm. It transits the bright star HIP 41378…
Development of the SPECULOOS exoplanet search project
D. Sebastian, P. P. Pedersen, C. A. Murray +20
SPECULOOS (Search for habitable Planets EClipsing ULtra-cOOl Stars) aims to perform a transit search on the nearest (pc) ultracool (K) dwarf stars. The project's main m…
Three Years of HARPS-N High-Resolution Spectroscopy and Precise Radial Velocity Data for the Sun
X. Dumusque, M. Cretignier, D. Sosnowska +35
The solar telescope connected to HARPS-N has been observing the Sun since the summer of 2015. Such high-cadence, long-baseline data set is crucial for understanding spurious radial…
EarthFinder Probe Mission Concept Study: Characterizing nearby stellar exoplanet systems with Earth-mass analogs for future direct imaging
Peter Plavchan, Gautam Vasisht, Chas Beichman +52
EarthFinder is a NASA Astrophysics Probe mission concept selected for study as input to the 2020 Astrophysics National Academies Decadal Survey. The EarthFinder concept is based on…
Earth: a 3.14-day Earth-sized Planet from 's Kitchen Served Warm by the SPECULOOS Team
Prajwal Niraula, Julien de Wit, Benjamin V. Rackham +25
We report on the discovery of a transiting Earth-sized (0.95) planet around an M3.5 dwarf star at 57pc, K2-315b. The planet has a period of 3.14 days, i.e. ${\s…
An Eclipsing Substellar Binary in a Young Triple System discovered by SPECULOOS
Amaury H. M. J. Triaud, Adam J. Burgasser, Artem Burdanov +18
Mass, radius, and age are three of the most fundamental parameters for celestial objects, enabling studies of the evolution and internal physics of stars, brown dwarfs, and planets…
The EBLM Project V. Physical properties of ten fully convective, very-low-mass stars
Alexander von Boetticher, Amaury H. M. J. Triaud, Didier Queloz +28
Measurements of the physical properties of stars at the lower end of the main sequence are scarce. In this context we report masses, radii and surface gravities of ten very-low-mas…
NGTS-4b: A sub-Neptune Transiting in the Desert
Richard G. West, Edward Gillen, Daniel Bayliss +48
We report the discovery of NGTS-4b, a sub-Neptune-sized planet transiting a 13th magnitude K-dwarf in a 1.34d orbit. NGTS-4b has a mass M=M_E and radius R=…
The Origin of RNA Precursors on Exoplanets
Paul Brandon Rimmer, Jianfeng Xu, Samantha Thompson +3
Given that the macromolecular building blocks of life were likely produced photochemically in the presence of ultraviolet (UV) light, we identify some general constraints on which…
SPECULOOS: a network of robotic telescopes to hunt for terrestrial planets around the nearest ultracool dwarfs
Laetitia Delrez, Michael Gillon, Didier Queloz +18
We present here SPECULOOS, a new exoplanet transit search based on a network of 1m-class robotic telescopes targeting the 1200 ultracool (spectral type M7 and later) dwarfs b…
On the Feasibility of Intense Radial Velocity Surveys for Earth-twin Discoveries
Richard D. Hall, Samantha J. Thompson, Will Handley +1
This work assesses the potential capability of the next generation of high-precision Radial Velocity (RV) instruments for Earth-twin exoplanet detection. From the perspective of th…
Unmasking the hidden NGTS-3Ab: a hot Jupiter in an unresolved binary system
Maximilian N. Günther, Didier Queloz, Edward Gillen +36
We present the discovery of NGTS-3Ab, a hot Jupiter found transiting the primary star of an unresolved binary system. We develop a joint analysis of multi-colour photometry, centro…
EarthFinder: A Precise Radial Velocity Probe Mission Concept For the Detection of Earth-Mass Planets Orbiting Sun-like Stars
Peter Plavchan, Bryson Cale, Patrick Newman +40
EarthFinder is a Probe Mission concept selected for study by NASA for input to the 2020 astronomy decadal survey. This study is currently active and a final white paper report is d…