O. Wertz
University of Bonn
7 Papers
33 Citations
O. Wertz is an academic researcher from University of Bonn. The author has contributed to research in topics: Astrometry & Gravitational lens. The author has an hindex of 5, co-authored 7 publications. Previous affiliations of O. Wertz include University of Liège.
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Papers
Gaia Data Release 2. Kinematics of globular clusters and dwarf galaxies around the Milky Way
Amina Helmi,F. van Leeuwen,Paul J. McMillan,Davide Massari,Teresa Antoja,Teresa Antoja,Annie C. Robin,Lennart Lindegren,Ulrich Bastian,Frédéric Arenou,C. Babusiaux,M. Biermann,Maarten A. Breddels,David Hobbs,Carme Jordi,Elena Pancino,Elena Pancino,Céline Reylé,Jovan Veljanoski,A. G. A. Brown,Antonella Vallenari,T. Prusti,Jhj de Bruijne,C. A. L. Bailer-Jones,D. W. Evans,L. Eyer,F. A. Jansen,Sergei A. Klioner,Uwe Lammers,Xavier Luri,Francois Mignard,C. Panem,Dimitri Pourbaix,Sofia Randich,P. Sartoretti,H. I. Siddiqui,Caroline Soubiran,Nicholas A. Walton,Mark Cropper,R. Drimmel,D. Katz,Mario G. Lattanzi,J. Bakker,Carla Cacciari,J. Castañeda,L. Chaoul,N. Cheek,F. De Angeli,C. Fabricius,Raphael Guerra,B. Holl,Eduard Masana,R. Messineo,Nami Mowlavi,K. Nienartowicz,P. Panuzzo,Jordi Portell,M. Riello,George M. Seabroke,Paolo Tanga,F. Thévenin,G. Gracia-Abril,G. Comoretto,M. Garcia-Reinaldos,D. Teyssier,Martin Altmann,Rene Andrae,Marc Audard,I. Bellas-Velidis,Kevin Benson,Jérôme Berthier,R. Blomme,P. Burgess,G. Busso,Benoit Carry,Alberto Cellino,G. Clementini,M. Clotet,O. L. Creevey,Michael Davidson,J. De Ridder,Ludovic Delchambre,Aldo Dell'Oro,C. Ducourant,J. Fernández-Hernández,Morgan Fouesneau,Yves Fremat,Laurent Galluccio,Miguel García-Torres,J. González-Núñez,J. González-Núñez,J. J. González-Vidal,Eric Gosset,Leanne P. Guy,J. L. Halbwachs,Nigel Hambly,D. L. Harrison,Jose M Hernandez,Daniel Hestroffer,Simon Hodgkin,A. Hutton,G. Jasniewicz,A. Jean-Antoine-Piccolo,Stefan Jordan,Andreas Korn,Alberto Krone-Martins,A. C. Lanzafame,T. Lebzelter,W. Loeffler,Minia Manteiga,P. M. Marrese,P. M. Marrese,J. M. Martín-Fleitas,André Moitinho,A. Mora,Karri Muinonen,Karri Muinonen,J. Osinde,T. Pauwels,J. M. Petit,Alejandra Recio-Blanco,P. J. Richards,L. Rimoldini,L. M. Sarro,Christos Siopis,Mike Smith,Alessandro Sozzetti,M. Sueveges,J. Torra,W. van Reeven,Ummi Abbas,A. Abreu Aramburu,S. Accart,Conny Aerts,Conny Aerts,G. Altavilla,G. Altavilla,M. A. Álvarez,R Alvarez,João Alves,Richard I. Anderson,Richard I. Anderson,Alexandre Humberto Andrei,Alexandre Humberto Andrei,Alexandre Humberto Andrei,E. Anglada Varela,E. Antiche,Bernardino Arcay,Tri L. Astraatmadja,Tri L. Astraatmadja,N. Bach,S. G. Baker,L. Balaguer-Núñez,P. Balm,Christophe Barache,C. Barata,D Barbato,D Barbato,F. Barblan,Paul S. Barklem,David Barrado,M. Barros,Martin A. Barstow,S. Bartholomé Muñoz,J.-L. Bassilana,Ugo Becciani,Michele Bellazzini,A. Berihuete,Stefano Bertone,Luciana Bianchi,Olivier Bienaymé,Sergi Blanco-Cuaresma,Sergi Blanco-Cuaresma,Sergi Blanco-Cuaresma,T. Boch,C Boeche,Alex Bombrun,R. Borrachero,Diego Bossini,S. Bouquillon,G Bourda,Angela Bragaglia,L. Bramante,Alessandro Bressan,N. Brouillet,T. Bruesemeister,E. Brugaletta,Beatrice Bucciarelli,A. Burlacu,Deborah Busonero,A. G. Butkevich,R. Buzzi,Elisabetta Caffau,Rossella Cancelliere,Giacomo Cannizzaro,Giacomo Cannizzaro,Tristan Cantat-Gaudin,Tristan Cantat-Gaudin,Ruth Carballo,T. Carlucci,J. M. Carrasco,Laia Casamiquela,Marco Castellani,Alfred Castro-Ginard,Patrick Charlot,Laurent Chemin,Andrea Chiavassa,G. Cocozza,G. Costigan,S. Cowell,F. Crifo,Mariateresa Crosta,C. Crowley,J. Cuypers,Carlos Dafonte,Yassine Damerdji,A. Dapergolas,P. David,M. David,P. de Laverny,F. De Luise,R. De March,D. de Martino,R. E. de Souza,A. de Torres,Jonas Debosscher,E. del Pozo,Marco Delbo,A. Delgado,H. E. Delgado,P. Di Matteo,S. Diakite,C. Diener,Elisa Distefano,C. Dolding,P. Drazinos,J. Durán,Bengt Edvardsson,Harry Enke,Kjell Eriksson,P. Esquej,GE Bontemps,C. Fabre,M. Fabrizio,M. Fabrizio,Simchon Faigler,A. J. Falcão,M. Farràs Casas,Luciana Federici,Grigori Fedorets,Pierre Fernique,Francesca Figueras,F. Filippi,K. Findeisen,A. Fonti,E. Fraile,Morgan Fraser,Morgan Fraser,B. Frezouls,Mario Gai,S. Galleti,D. Garabato,F. García-Sedano,A. Garofalo,A. Garofalo,N. Garralda,A. Gavel,P. Gavras,J. Gerssen,R. Geyer,Paolo Giacobbe,Gerard Gilmore,S. Girona,G. Giuffrida,G. Giuffrida,F. Glass,M. Gomes,Mikael Granvik,Mikael Granvik,A. Gueguen,A. Guerrier,J. Guiraud,R. Gutiérrez-Sánchez,W. Hofmann,G. Holland,H. E. Huckle,A. Hypki,A. Hypki,Icardi,K. Janssen,GJ de Fombelle,Peter G. Jonker,Peter G. Jonker,Á. L. Juhász,Á. L. Juhász,F. Julbe,A. Karampelas,A. Kewley,Joakim Klar,A. Kochoska,A. Kochoska,R. Kohley,Katrien Kolenberg,Katrien Kolenberg,Katrien Kolenberg,M. Kontizas,E. Kontizas,Sergey E. Koposov,Sergey E. Koposov,Georges Kordopatis,Z. Kostrzewa-Rutkowska,Z. Kostrzewa-Rutkowska,P. Koubsky,Sébastien Lambert,Antonino F. Lanza,Y. Lasne,J.-B. Lavigne,Y. Le Fustec,C. Le Poncin-Lafitte,Yveline Lebreton,Silvio Leccia,N. Leclerc,Isabelle Lecoeur-Taïbi,H. Lenhardt,F. Leroux,Shilong Liao,Shilong Liao,E. Licata,H. E. P. Lindstrøm,T. A. Lister,E. Livanou,Alex Lobel,M. López,S. Managau,Robert G. Mann,G. Mantelet,O. Marchal,Jon Marchant,Marcella Marconi,S. Marinoni,S. Marinoni,G. Marschalkó,G. Marschalkó,D. J. Marshall,M. Martino,Gábor Marton,Nicolas Mary,Gal Matijevic,Tsevi Mazeh,S. Messina,Daniel Michalik,N. R. Millar,D. Molina,Roberto Molinaro,László Molnár,Paolo Montegriffo,R. Mor,Roberto Morbidelli,Thierry Morel,Derek W. Morris,A. F. Mulone,Tatiana Muraveva,Ilaria Musella,Gijs Nelemans,Gijs Nelemans,Luciano Nicastro,L. Noval,William O'Mullane,C. Ordenovic,D. Ordóñez-Blanco,P. Osborne,C. Pagani,Isabella Pagano,F. Pailler,H. Palacin,L. Palaversa,L. Palaversa,A. Panahi,Michał Pawlak,Michał Pawlak,A. M. Piersimoni,F. X. Pineau,Emese Plachy,G. Plum,E. Poggio,E. Poggio,E. Poujoulet,Andrej Prsa,L. Pulone,E. Racero,S. Ragaini,Nicolas Rambaux,M. Ramos-Lerate,S. Regibo,F. Riclet,Ripepi,Alberto Riva,A. Rivard,Guy Rixon,T Roegiers,Maroussia Roelens,M. Romero-Gómez,Nicholas Rowell,Frédéric Royer,L. Ruiz-Dern,G. Sadowski,TS Selles,Johannes Sahlmann,Johannes Sahlmann,Jesus Salgado,E. Salguero,Nicoletta Sanna,Toni Santana-Ros,M. Sarasso,H. Savietto,M. Schultheis,Eva Sciacca,M. Segol,J. C. Segovia,Damien Ségransan,I-C. Shih,L. Siltala,A. F. Silva,Richard L. Smart,K. W. Smith,Enrique Solano,F. Solitro,Rosanna Sordo,Sonia Nieto,J. Souchay,Alessandro Spagna,Federica Spoto,U. Stampa,Iain A. Steele,H. Steidelmueller,C.A. Stephenson,H. Stoev,F. F. Suess,Jean Surdej,Laszlo Szabados,E. Szegedi-Elek,D. Tapiador,D. Tapiador,Francois Taris,G. Tauran,Mark Taylor,Ramachrisna Teixeira,D. Terrett,P. Teyssandier,William Thuillot,A. Titarenko,F. Torra Clotet,C. Turon,Ana Ulla,E. Utrilla,S Uzzi,M. Vaillant,Gaetano Valentini,Valette,A. van Elteren,E. Van Hemelryck,M. van Leeuwen,M Vaschetto,Alberto Vecchiato,Y. Viala,D. Vicente,Steven S. Vogt,C. von Essen,Holger Voss,Votruba,S. Voutsinas,G. Walmsley,M. Weiler,O. Wertz,T. Wevems,T. Wevems,L. Wyrzykowski,A. Yoldas,M. Zerjal,H. Ziaeepour,Juan Zorec,Sven Zschocke,Shay Zucker,C. Zurbach,Tomaz Zwitter +484 more
TL;DR: In this paper, the second data release of the Gaia mission and its power for constraining many different aspects of the dynamics of the satellites of the Milky Way is demonstrated. But the accuracy of the errors, statistical and systematic, are relatively well understood.
Gaia GraL: Gaia DR2 Gravitational Lens Systems - III. A systematic blind search for new lensed systems
Ludovic Delchambre,Alberto Krone-Martins,O. Wertz,C. Ducourant,Laurent Galluccio,J. Klüter,Francois Mignard,Ramachrisna Teixeira,S. G. Djorgovski,D. Stern,Matthew J. Graham,Jean Surdej,Ulrich Bastian,Joachim Wambsganss,Joachim Wambsganss,J. F. Le Campion,Eric Slezak +16 more
TL;DR: In this article, the authors used a regular grid of parameters characterizing a non-singular isothermal ellipsoid lens model in the presence of an external shear.
Gaia GraL: Gaia DR2 gravitational lens systems - I. New quadruply imaged quasar candidates around known quasars
Alberto Krone-Martins,Ludovic Delchambre,O. Wertz,C. Ducourant,Francois Mignard,Ramachrisna Teixeira,J. Klüter,J. F. Le Campion,Laurent Galluccio,Jean Surdej,Ulrich Bastian,Joachim Wambsganss,Matthew J. Graham,S. G. Djorgovski,Eric Slezak +14 more
TL;DR: In this article, the most promising new quasar lens candidates were discovered from Gaia DR2 and a simple singular isothermal ellipsoid lens model is able to reproduce their image positions to within ~1 mas.
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Characterization of low-mass companion HD 142527 B
Valentin Christiaens,Valentin Christiaens,Simon Casassus,Olivier Absil,Stefan Kimeswenger,Stefan Kimeswenger,C. A. Gomez Gonzalez,Jean Girard,Rocío Escandón Ramírez,O. Wertz,O. Wertz,Alice Zurlo,Zahed Wahhaj,Cecilia Flores,V. Salinas,Andrés Jordán,D. Mawet,D. Mawet +17 more
TL;DR: In this paper, a low-mass companion, HD 142527 B, was found orbiting the primary star at ~14 au, which could help explain its impact on the peculiar geometry of the disk.
Gaia GraL: Gaia DR2 gravitational lens systems. IV. Keck/LRIS spectroscopic confirmation of GRAL 113100−441959 and model prediction of time delays
O. Wertz,D. Stern,Alberto Krone-Martins,Ludovic Delchambre,C. Ducourant,U. Gråe Jørgensen,Martin Dominik,Martin Burgdorf,Jean Surdej,Francois Mignard,Ramachrisna Teixeira,Laurent Galluccio,J. Klüter,S. G. Djorgovski,Matthew J. Graham,Ulrich Bastian,Joachim Wambsganss,Joachim Wambsganss,Celine Boehm,J. F. Lecampion,Eric Slezak +20 more
TL;DR: In this article, the authors report the spectroscopic confirmation and modeling of the quadruply imaged quasar GRAL 113100-441959, the first gravitational lens (GL) to be discovered from a machine learning technique that only relies on the relative positions and fluxes of the observed images without considering colour informations.