146 citations · 629 across the 22 of their papers we have counts for
14 papers · 1 filter
Connecting photometric and spectroscopic granulation signals with CHEOPS and ESPRESSO
S. Sulis, M. Lendl, H. Cegla +83
Stellar granulation generates fluctuations in photometric and spectroscopic data whose properties depend on the stellar type, composition, and evolutionary state. In this study, we…
Scaling relations of convective granulation noise across the HR diagram from 3D stellar atmosphere models
Luisa Fernanda Rodríguez Díaz, Lionel Bigot, Víctor Aguirre Børsen-Koch +5
High-precision photometric data from space missions have improved our understanding of stellar granulation. These observations have shown with precision the stochastic brightness f…
The SAPP pipeline for the determination of stellar abundances and atmospheric parameters of stars in the core program of the PLATO mission
Matthew Raymond Gent, Maria Bergemann, Aldo Serenelli +25
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 cor…
Sun-like Oscillations in the Population II giant HD 122563
Orlagh Creevey, Frédéric Thévenin, Frank Grundahl +8
We have been monitoring the metal-poor Population II giant, HD 122563, for radial velocity variations since 2016 using the SONG telescope on Tenerife. We have detected the global s…
First detection of oscillations in the Halo giant HD 122563: validation of seismic scaling relations and new fundamental parameters
Orlagh Creevey, Frank Grundahl, Frédéric Thévenin +8
The nearby metal-poor giant HD122563 is an important astrophysical laboratory for which to test stellar atmospheric and interior physics. It is also a benchmark star for which to c…
The Stagger-grid: A grid of 3D stellar atmosphere models V. Synthetic stellar spectra and broad-band photometry
A. Chiavassa, L. Casagrande, R. Collet +4
Context. The surface structures and dynamics of cool stars are characterized by the presence of convective motions and turbulent flows which shape the emergent spectrum. Aims. We u…
Science cases for a visible interferometer
Philippe Stee, France Allard, Myriam Benisty +54
High spatial resolution is the key for the understanding various astrophysical phenomena. But even with the future E-ELT, single dish instruments are limited to a spatial resolutio…
Asymmetries on red giant branch surfaces from CHARA/MIRC optical interferometry
A. Chiavassa, R. Norris, M. Montargès +14
Context. Red giant branch (RGB) stars are very bright objects in galaxies and are often used as standard candles. Interferometry is the ideal tool to characterize the dynamics and…
Probing seismic solar analogues through observations with the NASA Kepler space telescope and HERMES high-resolution spectrograph
P. G. Beck, D. Salabert, R. A. García +21
Stars similar to the Sun, known as solar analogues, provide an excellent opportunity to study the preceding and following evolutionary phases of our host star. The unprecedented qu…
Three-dimensional interferometric, spectrometric, and planetary views of Procyon
A. Chiavassa, L. Bigot, P. Kervella +5
We used a new realistic 3D radiative-hydrodynamical model atmosphere of Procyon generated with the Stagger Code and synthetic spectra computed with the radiative transfer code Opti…
Theoretical light curves of dipole oscillations in roAp stars
L. Bigot, D. W. Kurtz
Context. The dipole modes are the most common geometry of oscillations in roAp stars inferred from photometric measurements and are therefore of special interest for asteroseismic…
The diameter of the CoRoT target HD 49933. Combining the 3D limb darkening, asteroseismology, and interferometry
L. Bigot, D. Mourard, P. Berio +21
Context. The interpretation of stellar pulsations in terms of internal structure depends on the knowledge of the fundamental stellar parameters. Long-base interferometers permit us…
A grid of NLTE corrections for magnesium and calcium in late-type giant and supergiant stars: application to Gaia
Thibault Merle, Frédéric Thévenin, Bernard Pichon +1
We investigate NLTE effects for magnesium and calcium in the atmospheres of late-type giant and supergiant stars. The aim of this paper is to provide a grid of NLTE/LTE equivalent…
The first evidence for multiple pulsation axes: a new roAp star in the Kepler field, KIC 10195926
D. W. Kurtz, M. S. Cunha, H. Saio +14
We have discovered a new rapidly oscillating Ap star among the Kepler Mission target stars, KIC 10195926. This star shows two pulsation modes with periods that are amongst the long…