N
Nicola Astudillo-Defru
Researcher at Catholic University of the Most Holy Conception
Publications - 139
Citations - 5133
Nicola Astudillo-Defru is an academic researcher from Catholic University of the Most Holy Conception. The author has contributed to research in topics: Planet & Exoplanet. The author has an hindex of 36, co-authored 127 publications receiving 3906 citations. Previous affiliations of Nicola Astudillo-Defru include University of Concepción & Centre national de la recherche scientifique.
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Journal ArticleDOI
A temperate rocky super-Earth transiting a nearby cool star
Jason A. Dittmann,Jonathan Irwin,David Charbonneau,Xavier Bonfils,Xavier Bonfils,Nicola Astudillo-Defru,Raphaëlle D. Haywood,Zachory K. Berta-Thompson,Elisabeth R. Newton,Joseph E. Rodriguez,Jennifer G. Winters,Thiam-Guan Tan,J. M. Almenara,J. M. Almenara,J. M. Almenara,François Bouchy,X. Delfosse,X. Delfosse,T. Forveille,T. Forveille,Christophe Lovis,Felipe Murgas,Felipe Murgas,Felipe Murgas,Francesco Pepe,Nuno C. Santos,Stéphane Udry,A. Wunsche,A. Wunsche,Gilbert A. Esquerdo,David W. Latham,Courtney D. Dressing +31 more
TL;DR: Observations of LHS 1140b, a planet with a radius of 1.4 Earth radii transiting a small, cool star (L HS 1140) 12 parsecs away, measure the mass of the planet to be 6.6 times that of Earth, consistent with a rocky bulk composition, and place an upper limit on the orbital eccentricity.
Journal ArticleDOI
A rocky planet transiting a nearby low-mass star
Zachory K. Berta-Thompson,Jonathan Irwin,David Charbonneau,Elisabeth R. Newton,Jason A. Dittmann,Nicola Astudillo-Defru,Xavier Bonfils,Michaël Gillon,Emmanuel Jehin,Antony A. Stark,B. Stalder,Francois Bouchy,Xavier Delfosse,Thierry Forveille,Christophe Lovis,Michel Mayor,V. Neves,Francesco Pepe,Nuno C. Santos,Stéphane Udry,A. Wunsche +20 more
TL;DR: In this paper, the authors reported observations of GJ 1132b, a planet with a size of 1.2 Earth radii that is transiting a small star 12 parsecs away.
Journal ArticleDOI
Atmospheric characterization of Proxima b by coupling the SPHERE high-contrast imager to the ESPRESSO spectrograph
C. Lovis,Ignas Snellen,David Mouillet,David Mouillet,Francesco Pepe,Francois Wildi,Nicola Astudillo-Defru,J. L. Beuzit,J. L. Beuzit,Xavier Bonfils,Xavier Bonfils,Anthony Cheetham,U. Conod,X. Delfosse,X. Delfosse,David Ehrenreich,Pedro Figueira,T. Forveille,T. Forveille,J. H. C. Martins,J. H. C. Martins,Sascha P. Quanz,Nuno C. Santos,H. M. Schmid,Damien Ségransan,Stéphane Udry +25 more
TL;DR: In this paper, a coupling interface between the SPHERE high-contrast imager and the ESPRESSO spectrograph is proposed to detect Proxima b and characterize its atmosphere by spatially resolving the planet and obtaining high-resolution reflected-light spectra.
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Magnetic activity in the HARPS M dwarf sample. The rotation-activity relationship for very low-mass stars through R' HK
Nicola Astudillo-Defru,Nicola Astudillo-Defru,Nicola Astudillo-Defru,Xavier Delfosse,Xavier Delfosse,Xavier Bonfils,Xavier Bonfils,Thierry Forveille,Thierry Forveille,Christophe Lovis,Julien Rameau,Julien Rameau,Julien Rameau +12 more
TL;DR: In this paper, a calibration of the R' HK index for FGK-dwarfs is presented, which shows a saturated correlation with rotation, with saturation setting in around a ten days rotation period.
Journal ArticleDOI
Orbital misalignment of the Neptune-mass exoplanet GJ 436b with the spin of its cool star.
Vincent Bourrier,Christophe Lovis,Hervé Beust,David Ehrenreich,Gregory W. Henry,Nicola Astudillo-Defru,Romain Allart,Xavier Bonfils,Damien Ségransan,X. Delfosse,Heather M. Cegla,Aurélien Wyttenbach,Kevin Heng,Baptiste Lavie,Francesco Pepe +14 more
TL;DR: Three-dimensional characterization of the trajectory of an exoplanet around an M dwarf star is reported, derived by mapping the spectrum of the stellar photosphere along the chord transited by the planet.