P
P. Guajardo
Researcher at European Southern Observatory
Publications - 14
Citations - 675
P. Guajardo is an academic researcher from European Southern Observatory. The author has contributed to research in topics: Interferometry & Very Large Telescope. The author has an hindex of 6, co-authored 12 publications receiving 488 citations. Previous affiliations of P. Guajardo include Max Planck Society.
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Journal ArticleDOI
Detection of orbital motions near the last stable circular orbit of the massive black hole SgrA
Roberto Abuter,António Amorim,M. Bauböck,Jean-Philippe Berger,H. Bonnet,Wolfgang Brandner,Yann Clénet,V. Coudé du Foresto,P. T. de Zeeuw,P. T. de Zeeuw,Casey Deen,Jason Dexter,Gilles Duvert,Andreas Eckart,Andreas Eckart,Frank Eisenhauer,N. M. Förster Schreiber,Paulo J. V. Garcia,Paulo J. V. Garcia,Paulo J. V. Garcia,Feng Gao,Eric Gendron,Reinhard Genzel,Reinhard Genzel,Stefan Gillessen,P. Guajardo,Maryam Habibi,Xavier Haubois,Th. Henning,Stefan Hippler,Matthew Horrobin,Armin Huber,A. Jiménez-Rosales,Laurent Jocou,Pierre Kervella,Sylvestre Lacour,Sylvestre Lacour,V. Lapeyrère,Bernard Lazareff,J.-B. Le Bouquin,Pierre Léna,Magdalena Lippa,Thomas Ott,Johana Panduro,Thibaut Paumard,Karine Perraut,Guy Perrin,Oliver Pfuhl,P. M. Plewa,Sebastian Rabien,G. Rodríguez-Coira,Gérard Rousset,Amiel Sternberg,Amiel Sternberg,Odele Straub,Christian Straubmeier,Eckhard Sturm,Linda J. Tacconi,Frederic H. Vincent,S. von Fellenberg,Idel Waisberg,Felix Widmann,Ekkehard Wieprecht,Erich Wiezorrek,Julien Woillez,S. Yazici,S. Yazici +66 more
TL;DR: In this article, the position centroids exhibit clockwise looped motion on the sky, on scales of typically 150 μ as over a few tens of minutes, corresponding to about 30% the speed of light.
Journal ArticleDOI
Detection of orbital motions near the last stable circular orbit of the massive black hole SgrA
R. Abuter,António Amorim,M. Bauböck,Jean-Philippe Berger,H. Bonnet,Wolfgang Brandner,Yann Clénet,V. Coudé du Foresto,P. T. de Zeeuw,Casey Deen,Jason Dexter,Gilles Duvert,Andreas Eckart,Frank Eisenhauer,N. M. Förster Schreiber,Paulo J. V. Garcia,Feng Gao,Eric Gendron,Reinhard Genzel,Stefan Gillessen,P. Guajardo,Maryam Habibi,Xavier Haubois,Th. Henning,Stefan Hippler,Matthew Horrobin,Armin Huber,A. Jiménez-Rosales,Laurent Jocou,Pierre Kervella,Sylvestre Lacour,Vincent Lapeyrere,B. Lazareff,J.-B. Le Bouquin,Pierre Léna,Magdalena Lippa,Thomas Ott,Johana Panduro,Thibaut Paumard,Karine Perraut,Guy Perrin,O. Pfuhl,P. M. Plewa,Sebastian Rabien,G. Rodríguez-Coira,G. Rousset,Amiel Sternberg,Odele Straub,Christian Straubmeier,Eckhard Sturm,Linda J. Tacconi,F. H. Vincent,S. von Fellenberg,Idel Waisberg,Felix Widmann,Ekkehard Wieprecht,Erich Wiezorrek,Julien Woillez,Senol Yazici +58 more
TL;DR: In this article, the authors reported the detection of continuous positional and polarization changes of SgrA* in high states of its variable near- infrared emission with the near-infrared GRAVITY-Very Large Telescope Interferometer (VLTI) beam-combining instrument.
Journal ArticleDOI
Multiple star systems in the Orion nebula
M. Karl,Oliver Pfuhl,Frank Eisenhauer,Reinhard Genzel,R. Grellmann,Maryam Habibi,Roberto Abuter,Matteo Accardo,António Amorim,Narsireddy Anugu,Gerardo Avila,Myriam Benisty,Jean-Philippe Berger,N. Blind,Henri Bonnet,Pierre Bourget,Wolfgang Brandner,R. Brast,A. Buron,Alessio Caratti o Garatti,F. Chapron,Yann Clénet,C. Collin,Vincent Coude du Foresto,Willem-Jan de Wit,Tim de Zeeuw,Casey Deen,F. Delplancke-Ströbele,Roderick Dembet,Frederic Derie,Jason Dexter,Gilles Duvert,M. Ebert,Andreas Eckart,Michael Esselborn,Pierre Fedou,G. Finger,Paulo J. V. Garcia,Cesar Enrique Garcia Dabo,Rebeca Garcia Lopez,Feng Gao,Eric Gendron,Stefan Gillessen,Frédéric Gonté,Paulo Gordo,Ulrich Grözinger,P. Guajardo,S. Guieu,Pierre Haguenauer,O. Hans,Xavier Haubois,Marcus Haug,F. Haußmann,Thomas Henning,Stefan Hippler,Matthew Horrobin,Armin Huber,Z. Hubert,N. Hubin,Gerd Jakob,Lieselotte Jochum,Laurent Jocou,Andreas Kaufer,Stefan Kellner,Sarah Kendrew,L. Kern,Pierre Kervella,Mario Kiekebusch,Ralf Klein,Rainer Köhler,Johan Kolb,Martin Kulas,Sylvestre Lacour,Vincent Lapeyrere,Bernard Lazareff,Jean-Baptiste Le Bouquin,Pierre Léna,Rainer Lenzen,Samuel Lévêque,Chien-Cheng Lin,Magdalena Lippa,Yves Magnard,Leander Mehrgan,Antoine Mérand,Thibaut Moulin,E. Müller,F. Müller,Udo Neumann,S. Oberti,Thomas Ott,L. Pallanca,Johana Panduro,Luca Pasquini,Thibaut Paumard,Isabelle Percheron,Karine Perraut,Guy Perrin,A. Pflüger,Thanh Phan Duc,P. M. Plewa,Dan Popovic,Sebastian Rabien,A. Ramirez,Jose Ramos,C. Rau,M. Riquelme,G. Rodríguez-Coira,Ralf-Rainer Rohloff,Alejandra Rosales,G. Rousset,J. Sanchez-Bermudez,Silvia Scheithauer,Markus Schöller,Nicolas Schuhler,Jason Spyromilio,Odele Straub,Christian Straubmeier,Eckhard Sturm,Marcos Suarez,Konrad R. W. Tristram,Noel Ventura,F. Vincent,Idel Waisberg,Imke Wank,Felix Widmann,Ekkehard Wieprecht,M. Wiest,Erich Wiezorrek,Markus Wittkowski,Julien Woillez,Burkhard Wolff,Senol Yazici,D. Ziegler,Gérard Zins +133 more
TL;DR: In this article, an interferometric study of the massive-binary fraction in the Orion Trapezium cluster with the recently comissioned GRAVITY instrument is presented. And the authors obtain a total number of 22 companions with separations up to 600 AU.
Journal ArticleDOI
Multiple Star Systems in the Orion Nebula
M. Karl,Oliver Pfuhl,Frank Eisenhauer,Reinhard Genzel,R. Grellmann,Maryam Habibi,Roberto Abuter,Matteo Accardo,António Amorim,Narsireddy Anugu,Gerardo Avila,Myriam Benisty,Jean-Philippe Berger,Nicolas Bland,Henri Bonnet,Pierre Bourget,Wolfgang Brandner,R. Brast,A. Buron,Alessio Caratti o Garatti,F. Chapron,Yann Clénet,C. Collin,Vincent Coudé du Foresto,Willem-Jan de Wit,Tim de Zeeuw,Casey Deen,F. Delplancke-Ströbele,Roderick Dembet,Frederic Derie,Jason Dexter,Gilles Duvert,M. Ebert,Andreas Eckart,Michael Esselborn,Pierre Fedou,Gert Finger,Paulo J. V. Garcia,Cesar Enrique Garcia Dabo,Rebeca Garcia Lopez,Feng Gao,Éric Gandron,Stefan Gillessen,Frédéric Gonté,Paulo Gordo,Ulrich Grözinger,P. Guajardo,S. Guieu,Pierre Haguenauer,O. Hans,Xavier Haubois,Marcus Haug,F. Haußmann,Thomas Henning,Stefan Hippler,Matthew Horrobin,Armin Huber,Zoltan Hubert,Norbert Hubin,Christian A. Hummel,Gerd Jakob,Lieselotte Jochum,Laurent Jocou,Andreas Kaufer,Stefan Kellner,Sarah Kandrew,L. Kern,Pierre Kervella,Mario Kiekebusch,Ralf Klein,Rainer Köhler,Johan Kolb,Martin Kulas,Sylvestre Lacour,Vincent Lapeyrere,Bernard Lazareff,Jean-Baptiste Le Bouquin,Pierre Léna,Rainer Lenzen,Samuel Lévêque,Chien-Cheng Lin,Magdalena Lippa,Yves Magnard,Leander Mehrgan,Antoine Mérand,Thibaut Moulin,E. Müller,F. Müller,Udo Neumann,Sylvain Oberti,Thomas Ott,Laurent Pallanca,Johana Panduro,Luca Pasquini,Thibaut Paumard,Isabelle Percheron,Karine Perraut,Guy Perrin,A. Pflüger,Thanh Phan Duc,P. M. Plewa,Dan Popovic,Sebastian Rabien,A. Ramirez,Jose Ramos,C. Rau,M. Riquelme,G. Rodríguez-Coira,Ralf-Rainer Rohloff,Alejandra Rosales,Gérard Rousset,J. Sanchez-Bermudez,Silvia Scheithauer,Markus Schöller,Nicolas Schuhler,Jason Spyromilio,Odele Straub,Christian Straubmeier,Eckhard Sturm,Marcos Suarez,Konrad R. W. Tristram,Noel Ventura,F. Vincent,Idel Waisberg,Imke Wank,Felix Widmann,Ekkehard Wieprecht,M. Wiest,Erich Wiezorrek,Markus Wittkowski,Julien Woillez,Burkhard Wolff,Senol Yazici,D. Ziegler,Gérard Zins +134 more
TL;DR: In this article, an interferometric study of the massive-binary fraction in the Orion Trapezium Cluster with the recently comissioned GRAVITY instrument is presented. And the separation distribution hints towards a bimodality.
Proceedings ArticleDOI
VLTI status update: a decade of operations and beyond
Antoine Mérand,Roberto Abuter,Emmanuel Aller-Carpentier,Luigi Andolfato,Jaime Alonso,Jean-Philippe Berger,Guillaume Blanchard,Henri M. J. Boffin,Pierre Bourget,Paul Bristow,Claudia Cid,Willem-Jan de Wit,Diego Del Valle,Franccoise Delplancke-Stroebele,Frederic Derie,Lorena Faundez,Steve Ertel,R. Grellmann,Philippe B. Gitton,Andreas Glindemann,P. Guajardo,S. Guieu,Stephane Guisard,Serge Guniat,Pierre Haguenauer,Christian Herrera,Christian A. Hummel,Carlos La Fuente,Marcelo Lopez,Pedro Mardones,Sebastien Morel,Andre Mueller,Isabelle Percheron,Than Phan Duc,Andres Pino,Sébastien Poupar,Eszter Pozna,A. Ramirez,Sridharan Rengaswamy,Lionel Rivas,Thomas Rivinius,Alex Segovia,Christian Schmid,Markus Schoeller,Nicolas Schuhler,Julien Woillez,Markus Wittkowski +46 more
TL;DR: In this article, the authors present the latest update of the European Southern Observatory's Very Large Telescope interferometer (VLTI) and also quantify the operational improvements using a performance metric, and take the opportunity of the first decade of operations to reflect on the VLTI community which is analyzed quantitatively and qualitatively.