Search Publications
Low-mass young stars in the Milky Way unveiled by DBSCAN and Gaia EDR3: Mapping the star forming regions within 1.5 kpc
Alcalá, J. M.; Micela, G.; Jeffries, R. D. +6 more
Context. With an unprecedented astrometric and photometric data precision, Gaia EDR3 provides, for the first time, the opportunity to systematically detect and map, in the optical bands, the low-mass populations of the star forming regions (SFRs) in the Milky Way.
Aims: We aim to provide a catalogue of the Gαiα EDR3 data (photometry, proper m…
TOI-1759 b: A transiting sub-Neptune around a low mass star characterized with SPIRou and TESS
Moutou, C.; Carmona, A.; Donati, J. -F. +57 more
We report the detection and characterization of the transiting sub-Neptune TOI-1759 b, using photometric time series from the Transiting Exoplanet Survey Satellite (TESS) and near-infrared spectropolarimetric data from the Spectro-Polarimètre Infra Rouge (SPIRou) on the Canada-France-Hawaii Telescope. TOI-1759 b orbits a moderately active M0V star…
Characterisation of Galactic carbon stars and related stars from Gaia EDR3
de Laverny, P.; Figueras, F.; Romero-Gómez, M. +1 more
The third early Gaia data release (EDR3) has improved the accuracy of the astrometric parameters of numerous long-period variable (LPV) stars. Many of these stars are on the asymptotic giant branch (AGB), showing either a C-rich or O-rich envelope and are characterised by high luminosity, changing surface composition, and intense mass loss. This m…
The SAPP pipeline for the determination of stellar abundances and atmospheric parameters of stars in the core program of the PLATO mission
Kovalev, Mikhail; Casagrande, Luca; Serenelli, Aldo +25 more
We introduce the SAPP (Stellar Abundances and atmospheric Parameters Pipeline), the prototype of the code that will be used to determine parameters of stars observed within the core program of the PLATO space mission. The pipeline is based on the Bayesian inference and provides effective temperature, surface gravity, metallicity, chemical abundanc…
HST/WFC3 transmission spectroscopy of the cold rocky planet TRAPPIST-1h
Gillon, M.; Wakeford, H. R.; Lewis, N. K. +4 more
Aims: TRAPPIST-1 is a nearby ultra-cool dwarf star transited by seven rocky planets. We observed three transits of its outermost planet, TRAPPIST-1h, using the G141 grism of the Wide Field Camera 3 instrument aboard the Hubble Space Telescope to place constraints on its potentially cold atmosphere.
Methods: In order to deal with the effe…
CHEOPS geometric albedo of the hot Jupiter HD 209458 b
Guterman, P.; Alonso, R.; Deleuil, M. +74 more
We report the detection of the secondary eclipse of the hot Jupiter HD 209458 b in optical/visible light using the CHEOPS space telescope. Our measurement of 20.4−3.3+3.2 parts per million translates into a geometric albedo of Ag = 0.096 ± 0.016. The previously estimated dayside temperature of about 1500 K implies …
What drives decayless kink oscillations in active-region coronal loops on the Sun?
Teriaca, Luca; Solanki, Sami K.; Long, David M. +19 more
Here, we present a study of the phenomena of decayless kink oscillations in a system of active-region (AR) coronal loops. Using high-resolution observations from two different instruments, namely the Extreme Ultraviolet Imager (EUI) on board Solar Orbiter and the Atmospheric Imaging Assembly (AIA) on board the Solar Dynamics Observatory, we follow…
Stellar limb darkening. A new MPS-ATLAS library for Kepler, TESS, CHEOPS, and PLATO passbands
Solanki, S. K.; Shapiro, A. I.; Maxted, P. F. L. +4 more
Context. The detection of the first exoplanet paved the way for the era of transit-photometry space missions with revolutionary photometric precision, whose aim is to discover new exoplanetary systems around different types of stars. With this high precision, it is possible to derive the radii of exoplanets very accurately, which is crucial for co…
Evidence of a vertical kinematic oscillation beyond the Radcliffe wave
Benjamin, R. A.; Gallagher, J. S., III; Drimmel, R. +5 more
The Radcliffe wave (RW) is a recently discovered sinusoidal vertical feature of dense gas in the proximity of the Sun. In the disk plane, it is aligned with the Local Arm. However, the origin of its vertical undulation is still unknown. This study constrains the kinematics of the RW, using young stars and open clusters as tracers, and explores the…
Self-absorption in [C II], 12CO, and H I in RCW120. Building up a geometrical and physical model of the region
Schneider, N.; Zavagno, A.; Stutzki, J. +19 more
Aims: Revealing the 3D dynamics of H II region bubbles and their associated molecular clouds and H I envelopes is important for developing an understanding of the longstanding problem as to how stellar feedback affects the density structure and kinematics of the different phases of the interstellar medium.
Methods: We employed observatio…