BEBOP II: sensitivity to sub-Saturn circumbinary planets using radial-velocities [PDF]
, 2022 BEBOP is a radial-velocity survey that monitors a sample of single-lined eclipsing binaries, in search of circumbinary planets by using high-resolution spectrographs.
Hellier, Maxted
core +1 more source
The young HD 73583 (TOI-560) planetary system: two 10-M-circle plus mini-Neptunes transiting a 500-Myr-old, bright, and active K dwarf [PDF]
, 2022 We present the discovery and characterization of two transiting planets observed by TESS in the light curves of the young and bright (V = 9.67) star HD73583 (TOI-560).
Hellier
core +1 more source
The HD 260655 system: Two rocky worlds transiting a bright M dwarf at 10 pc [PDF]
, 2022 We report the discovery of a multiplanetary system transiting the M0 V dwarf HD 260655 (GJ 239, TOI-4599). The system consists of at least two transiting planets, namely HD 260655 b, with a period of 2.77 d, a radius of Rb = 1.240 ± 0.023 R?, a mass of ...
Hellier
core +1 more source
Discovery and characterization of the exoplanets WASP-148b and c - A transiting system with two interacting giant planets [PDF]
, 2020 We present the discovery and characterization of WASP-148, a new extrasolar system that includes at least two giant planets. The host star is a slowly rotating inactive late-G dwarf with a V = 12 magnitude.
Smalley, Hellier, Maxted
core +1 more source
WASP-117b: a 10-day-period Saturn in an eccentric and misaligned orbit [PDF]
, 2014 We report the discovery of WASP-117b, the first planet with a period beyond 10 days found by the WASP survey. The planet has a mass of Mp = 0.2755 ± 0.0089 MJ, a radius of and is in an eccentric (e = 0.302 ± 0.023), 10.02165 ± 0.00055 d orbit around a ...
Smalley, Hellier, Maxted
core +1 more source
Consistent radial velocities of classical Cepheids from the cross-correlation technique [PDF]
Astronomy & Astrophysics, 2019 Context. Accurate radial velocities (vrad) of Cepheids are mandatory within the context of Cepheid distance measurements using the Baade-Wesselink technique. The most common vrad derivation method consists in cross-correlating the observed stellar spectra with a binary template and measuring a velocity on the resulting mean profile.
Borgniet, S. +13 more
openaire +3 more sources
A and F stars as probes of outer Galactic disc kinematics [PDF]
, 2018 Previous studies of the rotation law in the outer Galactic disc have mainly used gas tracers or clump giants. Here, we explore A and F stars as alternatives: these provide a much denser sampling in the outer disc than gas tracers and have experienced ...
Wright
core +1 more source
A hot terrestrial planet orbiting the bright M dwarf L 168-9 unveiled by TESS [PDF]
, 2020 We report the detection of a transiting super-Earth-sized planet (R = 1.39 ± 0.09 R?) in a 1.4-day orbit around L 168-9 (TOI-134), a bright M1V dwarf (V = 11, K = 7.1) located at 25.15 ± 0.02 pc.
Hellier
core +1 more source
Astronomy & Astrophysics, 2022 Context.Active regions on the photosphere of a star have been the major obstacle for detecting Earth-like exoplanets using the radial velocity (RV) method. A commonly employed solution for addressing stellar activity is to assume a linear relationship between the RV observations and the activity indicators along the entire time series, and then remove ...
Simola, U. +5 more
openaire +4 more sources
Detecting planets around very cool dwarfs at near infrared wavelengths with the radial velocity technique [PDF]
Astronomy & Astrophysics, 2011 Context. Radial velocity monitoring of very cool dwarfs such as late M- and hot L-dwarfs has become a promising tool to search for rocky planets as well as to follow-up planetary candidates around dwarfs found by transit surveys. These stars are faint at optical wavelengths, as their spectral flux distribution peaks at near-infrared (NIR) wavelengths ...
F. Rodler +7 more
openaire +2 more sources