R
Ronald Roelfsema
Researcher at ASTRON
Publications - 84
Citations - 6898
Ronald Roelfsema is an academic researcher from ASTRON. The author has contributed to research in topics: Exoplanet & Planet. The author has an hindex of 32, co-authored 83 publications receiving 5534 citations. Previous affiliations of Ronald Roelfsema include Nova Southeastern University & University of Groningen.
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Journal ArticleDOI
X-shooter, the new wide band intermediate resolution spectrograph at the ESO Very Large Telescope
Joel Vernet,Hans Dekker,S. D'Odorico,Lex Kaper,Per Kjaergaard,Francois Hammer,Sofia Randich,Filippo Maria Zerbi,P. M. Groot,Jens Hjorth,Isabelle Guinouard,Ramón Navarro,T. Adolfse,P. W. Albers,J. P. Amans,Johannes Andersen,Michael I. Andersen,P. Binetruy,Paul Bristow,R. Castillo,Fanny Chemla,Lise Christensen,Paolo Conconi,Ralf Conzelmann,J. Dam,V. De Caprio,A. de Ugarte Postigo,Bernard Delabre,P. Di Marcantonio,Mark Downing,Eddy Elswijk,Gert Finger,G. Fischer,Hector Flores,P. Francois,P. Goldoni,L. Guglielmi,R. Haigron,H. Hanenburg,I. Hendriks,Matthew Horrobin,David Horville,Niels Christian Jessen,Florian Kerber,L. Kern,Mario Kiekebusch,P. Kleszcz,J. Klougart,Jan Kragt,H. H. Larsen,J.-L. Lizon,C. Lucuix,Vincenzo Mainieri,R. Manuputy,Christophe Martayan,Elena Mason,R. Mazzoleni,N. Michaelsen,Andrea Modigliani,Sabine Moehler,Palle Møller,A. Norup Sørensen,P. Nørregaard,Celine Peroux,Ferdinando Patat,E. Pena,Johan Pragt,C. Reinero,F. Riga,Marco Riva,Ronald Roelfsema,F. Royer,G. G. Sacco,Paolo Santin,T. Schoenmaker,P. Spano,E. Sweers,R. ter Horst,M. Tintori,Niels Tromp,P. van Dael,H. van der Vliet,Lars Venema,M. Vidali,J. Vinther,Pascal Vola,R. Winters,D. Wistisen,Gerben Wulterkens,Andrea Zacchei +89 more
TL;DR: X-shooter as mentioned in this paper is the first 2nd generation instrument of the ESO Very Large Telescope (VLT), which was installed at the Cassegrain focus of UT2 in 2009.
Proceedings ArticleDOI
SPHERE: A ‘Planet Finder’ Instrument for the VLT
Jean-Luc Beuzit,Markus Feldt,Kjetil Dohlen,David Mouillet,Pascal Puget,Francois Wildi,Lyu Abe,Jacopo Antichi,Andrea Baruffolo,Pierre Baudoz,Anthony Boccaletti,Marcel Carbillet,Julien Charton,Riccardo Claudi,Mark Downing,Christophe Fabron,Philippe Feautrier,Enrico Fedrigo,Thierry Fusco,Jean-Luc Gach,Raffaele Gratton,Thomas Henning,Norbert Hubin,F. Joos,Markus Kasper,Maud Langlois,Rainer Lenzen,C. Moutou,A. Pavlov,Cyril Petit,Johan Pragt,Patrick Rabou,F. Rigal,Ronald Roelfsema,Gérard Rousset,Michel Saisse,H. M. Schmid,Eric Stadler,Christian Thalmann,Massimo Turatto,Stéphane Udry,Farrokh Vakili,Rens Waters +42 more
TL;DR: The SPHERE instrument as discussed by the authors was designed for direct detection and spectral characterization of extra-solar planets, where the main challenge consists in the very large contrast between the host star and the planet, typically inside the seeing halo.
Journal ArticleDOI
Discovery of a planetary-mass companion within the gap of the transition disk around PDS 70
Miriam Keppler,Myriam Benisty,Myriam Benisty,André Müller,Th. Henning,R. van Boekel,Faustine Cantalloube,Christian Ginski,Christian Ginski,R. G. van Holstein,Anne-Lise Maire,Adriana Pohl,Matthias Samland,Henning Avenhaus,Jean-Loup Baudino,Anthony Boccaletti,J. de Boer,M. Bonnefoy,Gael Chauvin,Gael Chauvin,Silvano Desidera,Maud Langlois,Maud Langlois,C. Lazzoni,G.-D. Marleau,G.-D. Marleau,Christoph Mordasini,N. Pawellek,N. Pawellek,Tomas Stolker,Arthur Vigan,Alice Zurlo,Alice Zurlo,Tilman Birnstiel,Wolfgang Brandner,M. Feldt,Mario Flock,Mario Flock,Mario Flock,Julien Girard,Julien Girard,Raffaele Gratton,Janis Hagelberg,Andrea Isella,Markus Janson,Markus Janson,Attila Juhasz,J. Kemmer,Quentin Kral,Quentin Kral,Anne-Marie Lagrange,Ralf Launhardt,Alexis Matter,Francois Menard,Julien Milli,P. Mollière,Johan Olofsson,Johan Olofsson,Laura M. Pérez,Paola Pinilla,Christophe Pinte,Christophe Pinte,Christophe Pinte,Sascha P. Quanz,T. Schmidt,Stéphane Udry,Zahed Wahhaj,Jonathan Williams,Esther Buenzli,M. Cudel,Carsten Dominik,Raphaël Galicher,M. Kasper,J. Lannier,Dino Mesa,Dino Mesa,David Mouillet,S. Peretti,C. Perrot,Graeme Salter,E. Sissa,Francois Wildi,L. Abe,Jacopo Antichi,Jean-Charles Augereau,Andrea Baruffolo,Pierre Baudoz,Andreas Bazzon,Jean-Luc Beuzit,P. Blanchard,S. S. Brems,Tristan Buey,V. De Caprio,Marcel Carbillet,M. Carle,Enrico Cascone,A. Cheetham,Riccardo Claudi,Anne Costille,A. Delboulbe,Kjetil Dohlen,Daniela Fantinel,Philippe Feautrier,Thierry Fusco,Enrico Giro,L. Gluck,Cecile Gry,Norbert Hubin,Emmanuel Hugot,M. Jaquet,D. Le Mignant,M. Llored,F. Madec,Yves Magnard,Patrice Martinez,D. Maurel,Michael Meyer,Michael Meyer,O. Möller-Nilsson,Thibaut Moulin,Laurent M. Mugnier,Alain Origne,A. Pavlov,D. Perret,Cyril Petit,J. Pragt,Pascal Puget,P. Rabou,Joany Andreina Manjarres Ramos,F. Rigal,S. Rochat,Ronald Roelfsema,Gérard Rousset,A. Roux,Bernardo Salasnich,Jean-François Sauvage,Arnaud Sevin,Christian Soenke,Eric Stadler,M. Suarez,Massimo Turatto,L. Weber +141 more
TL;DR: In this article, the authors detect a point source within the gap of the transition disk at about 195 mas (~22 au) projected separation and detect a signal from an inner disk component.
Journal ArticleDOI
Discovery of a planetary-mass companion within the gap of the transition disk around PDS 70
Miriam Keppler,Myriam Benisty,André Müller,Th. Henning,R. van Boekel,Faustine Cantalloube,Christian Ginski,R. G. van Holstein,Anne-Lise Maire,A. Pohl,M. Samland,Henning Avenhaus,Jean-Loup Baudino,Anthony Boccaletti,J. de Boer,M. Bonnefoy,Gael Chauvin,Silvano Desidera,Maud Langlois,C. Lazzoni,G.-D. Marleau,Christoph Mordasini,N. Pawellek,Tomas Stolker,Arthur Vigan,Alice Zurlo,Tilman Birnstiel,Wolfgang Brandner,M. Feldt,Mario Flock,Julien Girard,Raffaele Gratton,Janis Hagelberg,Andrea Isella,Markus Janson,Attila Juhasz,J. Kemmer,Quentin Kral,Anne-Marie Lagrange,Ralf Launhardt,Alexis Matter,Francois Menard,Julien Milli,Paul Mollière,Johan Olofsson,Laura M. Pérez,P. Pinilla,Christophe Pinte,Sascha P. Quanz,T. O. B. Schmidt,Stéphane Udry,Zahed Wahhaj,Jonathan Williams,Esther Buenzli,M. Cudel,Carsten Dominik,Raphaël Galicher,M. Kasper,J. Lannier,Dino Mesa,David Mouillet,S. Peretti,C. Perrot,G. Salter,E. Sissa,Francois Wildi,L. Abe,J. Antichi,Jean-Charles Augereau,Andrea Baruffolo,Pierre Baudoz,Andreas Bazzon,Jean-Luc Beuzit,P. Blanchard,S. S. Brems,Tristan Buey,V. De Caprio,Marcel Carbillet,M. Carle,Enrico Cascone,Anthony Cheetham,Riccardo Claudi,Anne Costille,A. Delboulbe,Kjetil Dohlen,D. Fantinel,Philippe Feautrier,Thierry Fusco,Enrico Giro,D. Gisler,L. Gluck,Cecile Gry,N. Hubin,Emmanuel Hugot,M. Jaquet,D. Le Mignant,M. Llored,F. Madec,Yves Magnard,P. Martinez,D. Maurel,Michael Meyer,O. Moeller-Nilsson,Thibaut Moulin,Laurent M. Mugnier,Alain Origne,A. Pavlov,D. Perret,Cyril Petit,J. Pragt,Pascal Puget,Patrick Rabou,Juan-Luis Ramos,F. Rigal,Sylvain Rochat,Ronald Roelfsema,G. Rousset,A. Roux,Bernardo Salasnich,Jean-François Sauvage,Arnaud Sevin,Christian Soenke,Eric Stadler,Marcos Suarez,Massimo Turatto,L. Weber +125 more
TL;DR: In this paper, a point source was detected within the gap of the transition disk at about 195 mas (about 22 au) projected separation, and the detection was confirmed at five different epochs, in three filter bands and using different instruments.
Journal ArticleDOI
SPHERE: the exoplanet imager for the Very Large Telescope
Jean-Luc Beuzit,Arthur Vigan,David Mouillet,Kjetil Dohlen,Raffaele Gratton,Anthony Boccaletti,Jean-François Sauvage,H. M. Schmid,Maud Langlois,Cyril Petit,Andrea Baruffolo,M. Feldt,Julien Milli,Zahed Wahhaj,L. Abe,U. Anselmi,J. Antichi,Rudy Barette,J. Baudrand,Pierre Baudoz,Andreas Bazzon,P. Bernardi,P. Blanchard,R. Brast,Pietro Bruno,Tristan Buey,Marcel Carbillet,M. Carle,Enrico Cascone,F. Chapron,Gael Chauvin,Julien Charton,Riccardo Claudi,Anne Costille,V. De Caprio,A. Delboulbe,Silvano Desidera,Carsten Dominik,Mark Downing,O. Dupuis,Christophe Fabron,D. Fantinel,G. Farisato,Philippe Feautrier,Enrico Fedrigo,T. Fusco,P. Gigan,Christian Ginski,Julien Girard,Enrico Giro,D. Gisler,L. Gluck,Cecile Gry,Th. Henning,N. Hubin,Emmanuel Hugot,S. Incorvaia,M. Jaquet,M. Kasper,Eric Lagadec,Anne-Marie Lagrange,H. Le Coroller,D. Le Mignant,B. Le Ruyet,G. Lessio,J. L. Lizon,M. Llored,Lars Lundin,F. Madec,Yves Magnard,M. Marteaud,P. Martinez,D. Maurel,Francois Menard,Dino Mesa,O. Möller-Nilsson,Thibaut Moulin,C. Moutou,Alain Origne,J. Parisot,A. Pavlov,D. Perret,J. Pragt,Pascal Puget,Patrick Rabou,Juan-Luis Ramos,Jean Michel Reess,F. Rigal,Sylvain Rochat,Ronald Roelfsema,G. Rousset,A. Roux,Michel Saisse,Bernardo Salasnich,E. Sant'Ambrogio,Salvo Scuderi,D. Segransan,Arnaud Sevin,Ralf Siebenmorgen,Christian Soenke,Eric Stadler,Marcos Suarez,Didier Tiphene,Massimo Turatto,Stéphane Udry,Farrokh Vakili,L. B. F. M. Waters,L. Weber,Francois Wildi,Gérard Zins,Alice Zurlo +110 more
TL;DR: The Spectro-Polarimetic High contrast imager for Exoplanets REsearch (SPHERE) was designed and built for the ESO Very Large Telescope (VLT) in Chile as mentioned in this paper.