G
Geert Barentsen
Researcher at Ames Research Center
Publications - 143
Citations - 11516
Geert Barentsen is an academic researcher from Ames Research Center. The author has contributed to research in topics: Exoplanet & Planet. The author has an hindex of 30, co-authored 141 publications receiving 8696 citations. Previous affiliations of Geert Barentsen include Max Planck Society & University of Hertfordshire.
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Journal ArticleDOI
The Gaia-ESO Survey: Chromospheric emission, accretion properties, and rotation in γ Velorum and Chamaeleon I
Antonio Frasca,Katia Biazzo,A. C. Lanzafame,A. C. Lanzafame,J. M. Alcalá,E. Brugaletta,E. Brugaletta,A. Klutsch,Beate Stelzer,G. G. Sacco,Lorenzo Spina,R. D. Jeffries,D. Montes,Emilio J. Alfaro,Geert Barentsen,Rosaria Bonito,Rosaria Bonito,J. F. Gameiro,Javier López-Santiago,G. Pace,Luca Pasquini,Loredana Prisinzano,S. G. Sousa,Gerard Gilmore,Sofia Randich,Giuseppina Micela,Angela Bragaglia,Ettore Flaccomio,Amelia Bayo,Amelia Bayo,M. T. Costado,E. Franciosini,Vanessa Hill,A. Hourihane,Paula Jofre,Carmela Lardo,Enrico Maiorca,Thomas Masseron,L. Morbidelli,C. C. Worley +39 more
TL;DR: In this paper, a comparative study of the main properties of the sources belonging to gamma Velorum (gamma Vel) and Chamaeleon I (Cha I) young associations was conducted, focusing on their rotation, chromospheric radiative losses, and accretion.
Posted Content
The Astropy Project: Building an inclusive, open-science project and status of the v2.0 software
Adrian M. Price-Whelan,Brigitta Sipőcz,Hans Moritz Günther,P. L. Lim,Steven M. Crawford,Simon Conseil,David L. Shupe,Matt Craig,N. Dencheva,Adam Ginsburg,Jacob T VanderPlas,Larry Bradley,David Pérez-Suárez,M. de Val-Borro,T. L. Aldcroft,Kelle L. Cruz,Thomas P. Robitaille,Erik J. Tollerud,C. Ardelean,Tomáš Babej,Matteo Bachetti,A. V. Bakanov,Steven P. Bamford,Geert Barentsen,Pauline Barmby,Andreas Baumbach,Katherine Berry,F. Biscani,Médéric Boquien,K. A. Bostroem,L. G. Bouma,Gabriel B. Brammer,Erik Bray,H. Breytenbach,H. Buddelmeijer,Douglas Burke,G. Calderone,J. L. Cano Rodríguez,Mihai Cara,José Vinícius de Miranda Cardoso,S. Cheedella,Y. Copin,Devin Crichton,D. DÁvella,Christoph Deil,Éric Depagne,J. P. Dietrich,Axel Donath,Michael Droettboom,Nicholas Earl,Thomas Erben,Sebastien Fabbro,Leonardo Ferreira,T. Finethy,R. T. Fox,Lehman H. Garrison,S. L. J. Gibbons,David Goldstein,Ralf Gommers,Johnny P. Greco,Perry Greenfield,A. M. Groener,Frédéric Grollier,Alex Hagen,Paul Hirst,Derek Homeier,Anthony Horton,Griffin Hosseinzadeh,L. Hu,J. S. Hunkeler,Željko Ivezić,A. Jain,Tim Jenness,G. Kanarek,Sarah Kendrew,Nicholas S. Kern,Wolfgang Kerzendorf,A. Khvalko,J. King,D. Kirkby,A. M. Kulkarni,Ashok Kumar,Antony Lee,D. Lenz,S. P. Littlefair,Zhiyuan Ma,D. M. Macleod,M. Mastropietro,C. McCully,S. Montagnac,Brett M. Morris,Michael Mueller,Stuart Mumford,Demitri Muna,Nicholas A. Murphy,Stefan Nelson,G. H. Nguyen,Joe Philip Ninan,M. Nöthe,S. Ogaz +99 more
TL;DR: The Astropy project as discussed by the authors is an open-source and openly developed Python packages that provide commonly-needed functionality to the astronomical community, including the core package Astropy, which serves as the foundation for more specialized projects and packages.
Journal ArticleDOI
T Tauri candidates and accretion rates using IPHAS: method and application to IC1396
Geert Barentsen,Jorick S. Vink,Janet E. Drew,Robert Greimel,Nicholas J. Wright,J. J. Drake,E. L. Martín,L. Valdivielso,Romano L. M. Corradi +8 more
TL;DR: In this paper, the INT Photometric H-Alpha Survey (IPHAS) is used to reliably select classical T Tauri star candidates and constrain the mass accretion rates with an estimated relative uncertainty of 0.6 dex.
Journal ArticleDOI
The Gaia-ESO Survey: Chromospheric Emission, Accretion Properties, and Rotation in $\gamma$ Velorum and Chamaeleon I
Antonio Frasca,K. Biazzo,A. C. Lanzafame,J. M. Alcalá,E. Brugaletta,A. Klutsch,Beate Stelzer,G. G. Sacco,Lorenzo Spina,R. D. Jeffries,D. Montes,Emilio J. Alfaro,Geert Barentsen,R. Bonito,J. F. Gameiro,Javier Lopez-Santiago,G. Pace,Luca Pasquini,Loredana Prisinzano,S. G. Sousa,Gerry Gilmore,Sofia Randich,Giuseppina Micela,A. Bragaglia,Ettore Flaccomio,Amelia Bayo,M. T. Costado,E. Franciosini,V. Hill,A. Hourihane,Paula Jofre,Carmela Lardo,Enrico Maiorca,Thomas Masseron,L. Morbidelli,C. C. Worley +35 more
TL;DR: In this paper, the authors used the fundamental parameters delivered by the GES consortium in the first internal data release to select the members of $\gamma$ Vel and Cha I among the UVES and GIRAFFE spectroscopic observations.
Journal ArticleDOI
Beyond the Kepler/K2 bright limit: Variability in the seven brightest members of the Pleiades
Timothy R. White,Timothy R. White,Timothy R. White,Benjamin J. S. Pope,Victoria Antoci,Péter Pápics,Conny Aerts,Conny Aerts,D. R. Gies,Kathryn Gordon,Daniel Huber,Gail Schaefer,Suzanne Aigrain,Simon Albrecht,Thomas Barclay,Geert Barentsen,Paul G. Beck,Timothy R. Bedding,Timothy R. Bedding,M. Fredslund Andersen,Frank Grundahl,Steve B. Howell,Michael J. Ireland,Simon J. Murphy,Simon J. Murphy,Martin Bo Nielsen,Martin Bo Nielsen,V. Silva Aguirre,Peter G. Tuthill +28 more
TL;DR: In this paper, a new photometric technique, called Halo photometry, was developed to observe very bright stars using a limited number of pixels, which is simple, fast and does not require extensive pixel allocation, and will allow us to use K2 and other photometric missions, such as TESS, to observe the stars for asteroseismology and search for transiting exoplanets.