Hot Degenerates in the MCT Survey. III. A Sample of White Dwarf Stars in the Southern Hemisphere
Pierre Bergeron,F. Wesemael,G. Fontaine,Robert Lamontagne,Serge Demers,A. Bédard,M.-J. Gingras,Simon Blouin,Mike Irwin,Souza Oliveira Kepler +9 more
TLDR
In this paper, the optical spectra of 144 white dwarfs detected in the Montreal-Cambridge-Tololo (MCT) colorimetric survey were presented, including 120 DA, 12 DB, 4 DO, 1 DQ, and 7 DC stars.Abstract:
We present optical spectra of 144 white dwarfs detected in the Montreal-Cambridge-Tololo (MCT) colorimetric survey, including 120 DA, 12 DB, 4 DO, 1 DQ, and 7 DC stars. We also perform a model atmosphere analysis of all objects in our sample using the so-called spectroscopic technique, or the photometric technique in the case of DC white dwarfs. The main objective of this paper is to contribute to the ongoing effort of confirming spectroscopically all white dwarf candidates in the Gaia survey, in particular in the southern hemisphere. All our spectra are made available in the Montreal White Dwarf Database.read more
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Discovery of magnetic fields in five DC white dwarfs
TL;DR: In this paper , the authors use broadband filter polarimetry, arguably the most efficient way to detect magnetic fields in featureless WDs via continuum circular polarization, to confirm the existence of magnetism in five DC-type WDs.
Journal ArticleDOI
$\textit{Gaia}$ white dwarfs within 40 pc III: spectroscopic observations of new candidates in the southern hemisphere
M. O'Brien,Pier-Emmanuel Tremblay,Nicola Pietro Gentile Fusillo,Mark A. Hollands,B. Gaensicke,Detlev Koester,Ingrid Pelisoli,Elena Cukanovaite,Tim Cunningham,Alexandra E. Doyle,A. J. Elms,Jay Farihi,J. J. Hermes,J.B. Holberg,Stefan Jordan,Beth Klein,S. J. Kleinman,Christopher J. Manser,D. de Martino,Tom Marsh,J. McCleery,Carl Melis,Atsuko Nitta,Steven G. Parsons,Roberto Raddi,Alberto Rebassa-Mansergas,Matthias R. Schreiber,Roberto Silvotti,Danny Steeghs,Odette Toloza,Silvia Toonen,Santiago Torres,M. Weinberger,Barry Zuckerman +33 more
TL;DR: In this paper , a survey of 248 white dwarfs within 40 pc of the Sun is presented, of these 244 are in the southern hemisphere. But the results of the survey were limited to the Gaia Data Release 3 (DR3).
Journal ArticleDOI
Two substellar survivor candidates; one found and one missing
Nicole Walters,Jay Farihi,Tom Marsh,Elmé Breedt,P. Wilson Cauley,Ted von Hippel,J. J. Hermes +6 more
TL;DR: In this article , the authors present observations of two possible substellar survivors of post-main sequence engulfment, currently orbiting white dwarf stars, which suggest all closelyorbiting giant planets are consumed, which may contribute to mass loss and magnetic field generation in white dwarfs and their immediate progenitors.
Journal ArticleDOI
Data-Driven Selection and Spectral Classification of White Dwarf Stars
TL;DR: In this article , a data-driven pipeline for fast, automatic selection and spectroscopic classification of white dwarf (WD) candidates is proposed, trained using spectroscopically confirmed objects with available Gaia astrometry, photometry, and SDSS spectra with signal-to-noise ratios ≥ 9.
References
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Journal ArticleDOI
Gaia Data Release 2: Observational Hertzsprung-Russell diagrams
C. Babusiaux,F. van Leeuwen,Martin A. Barstow,Carme Jordi,Antonella Vallenari,Diego Bossini,A. Bressan,Tristan Cantat-Gaudin,M. van Leeuwen,A. G. A. Brown,T. Prusti,J. H. J. de Bruijne,Coryn A. L. Bailer-Jones,M. Biermann,D. W. Evans,L. Eyer,F. A. Jansen,Sergei A. Klioner,Uwe Lammers,Lennart Lindegren,Xavier Luri,Francois Mignard,C. Panem,Dimitri Pourbaix,Sofia Randich,P. Sartoretti,H. Siddiqui,Caroline Soubiran,Nicholas A. Walton,Frédéric Arenou,Ulrich Bastian,Mark Cropper,R. Drimmel,D. Katz,Massimiliano Lattanzi,Joost M. Bakker,Carla Cacciari,J. Castañeda,L. Chaoul,N. Cheek,F. DeAngeli,C. Fabricius,Raphael Guerra,B. Holl,Eduard Masana,R. Messineo,Nami Mowlavi,Krzysztof Nienartowicz,P. Panuzzo,Jordi Portell,M. Riello,George M. Seabroke,Paolo Tanga,F. Thévenin,G. Gracia-Abril,Giovanni Comoretto,M. Garcia-Reinaldos,D. Teyssier,Martin Altmann,Rene Andrae,Marc Audard,I. Bellas-Velidis,Kevin Benson,Jérôme Berthier,R. Blomme,Paul W. Burgess,G. Busso,Benoit Carry,Alberto Cellino,G. 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Panahi,Michał Pawlak,A. M. Piersimoni,F. X. Pineau,Emese Plachy,G. Plum,E. Poggio,E. Poujoulet,Andrej Prsa,L. Pulone,E. Racero,S. Ragaini,Nicolas Rambaux,M. Ramos-Lerate,S. Regibo,Céline Reylé,F. Riclet,V. Ripepi,Alberto Riva,A. Rivard,Guy Rixon,T. Roegiers,Maroussia Roelens,M. Romero-Gómez,Nicholas Rowell,Frédéric Royer,L. Ruiz-Dern,G. Sadowski,T. Sagristà Sellés,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,E. Solano,F. Solitro,Rosanna Sordo,S. SoriaNieto,J. Souchay,A. Spagna,Federica Spoto,U. Stampa,Iain A. Steele,H. Steidelmüller,C.A. Stephenson,H. Stoev,F. F. Suess,Jean Surdej,László Szabados,E. Szegedi-Elek,D. Tapiador,Francois Taris,G. Tauran,Mark Taylor,Ramachrisna Teixeira,David Terrett,P. Teyssandier,William Thuillot,A. Titarenko,F. TorraClotet,C. Turon,Ana Ulla,E. Utrilla,S. Uzzi,M. Vaillant,Gaetano Valentini,V. Valette,A. vanElteren,E. Van Hemelryck,M. Vaschetto,Alberto Vecchiato,Jovan Veljanoski,Y. Viala,D. Vicente,Steven S. Vogt,C. vonEssen,H. Voss,Viktor Votruba,S. Voutsinas,G. Walmsley,M. Weiler,Olivier Wertz,Thomas Wevers,Łukasz Wyrzykowski,A. Yoldas,M. Žerjal,H. Ziaeepour,J. Zorec,Sven Zschocke,Shay Zucker,C. Zurbach,Tomaz Zwitter +451 more
TL;DR: In this article, the power of the Gaia DR2 in studying many fine structures of the Hertzsprung-Russell diagram (HRD) was highlighted, depending in particular on stellar population selections.
Journal ArticleDOI
Gaia Data Release 2 - Observational Hertzsprung-Russell diagrams
C. Babusiaux,F. van Leeuwen,M. A. Barstow,Carme Jordi,Antonella Vallenari,Diego Bossini,Alessandro Bressan,Tristan Cantat-Gaudin,M. van Leeuwen,Anthony G. A. Brown,T. Prusti,J. H. J. de Bruijne,Coryn A. L. Bailer-Jones,M. Biermann,D. W. Evans,L. Eyer,F. Jansen,Sergei A. Klioner,U. Lammers,Lennart Lindegren,Xavier Luri,Francois Mignard,C. Panem,Dimitri Pourbaix,Sofia Randich,P. Sartoretti,H. I. Siddiqui,Caroline Soubiran,Nicholas A. Walton,Frédéric Arenou,Ulrich Bastian,Mark Cropper,R. Drimmel,D. Katz,M. G. Lattanzi,Joost M. Bakker,C. Cacciari,J. Castañeda,L. Chaoul,N. Cheek,F. De Angeli,C. Fabricius,Raphael Guerra,B. Holl,E. Masana,R. Messineo,Nami Mowlavi,K. Nienartowicz,P. Panuzzo,J. Portell,M. Riello,George M. Seabroke,Paolo Tanga,F. Thévenin,G. Gracia-Abril,G. Comoretto,M. Garcia-Reinaldos,D. Teyssier,Martin Altmann,Rene Andrae,M. Audard,I. Bellas-Velidis,K. Benson,Jérôme Berthier,R. Blomme,P. Burgess,G. Busso,Benoit Carry,Alberto Cellino,G. Clementini,M. Clotet,O. Creevey,M. Davidson,J. De Ridder,Ludovic Delchambre,A. Dell'Oro,C. Ducourant,J. Fernández-Hernández,Morgan Fouesneau,Yves Fremat,Laurent Galluccio,Miguel García-Torres,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,S. T. Hodgkin,A. Hutton,G. Jasniewicz,A. Jean-Antoine-Piccolo,Stefan Jordan,Andreas Korn,Alberto Krone-Martins,A. C. Lanzafame,T. Lebzelter,W. Löffler,Minia Manteiga,P. M. Marrese,J. M. Martín-Fleitas,André Moitinho,A. Mora,Karri Muinonen,J. Osinde,E. Pancino,T. Pauwels,J.-M. Petit,Alejandra Recio-Blanco,P. J. Richards,L. Rimoldini,Annie C. Robin,L. M. Sarro,Christos Siopis,M. J. S. Smith,Alessandro Sozzetti,Maria Süveges,J. Torra,W. van Reeven,U. Abbas,A. Abreu Aramburu,S. Accart,Conny Aerts,G. Altavilla,M. A. Álvarez,R. Alvarez,João Alves,Richard I. Anderson,Alexandre Humberto Andrei,E. Anglada Varela,E. Antiche,Teresa Antoja,Bernardino Arcay,Tri L. Astraatmadja,N. Bach,S. G. Baker,L. Balaguer-Núñez,P. Balm,C. Barache,C. Barata,D. Barbato,F. Barblan,Paul S. Barklem,David Barrado,M. Barros,L. Bartholomé Muñoz,J.-L. Bassilana,Ugo Becciani,M. Bellazzini,A. Berihuete,Stefano Bertone,Luciana Bianchi,O. Bienaymé,S. Blanco-Cuaresma,T. Boch,C. Boeche,Alex Bombrun,R. Borrachero,S. Bouquillon,G. Bourda,Angela Bragaglia,L. Bramante,Maarten A. Breddels,N. Brouillet,T. Brüsemeister,E. Brugaletta,B. Bucciarelli,A. Burlacu,D. Busonero,A. G. Butkevich,R. Buzzi,Elisabetta Caffau,R. Cancelliere,G. Cannizzaro,R. Carballo,T. Carlucci,J. M. Carrasco,Laia Casamiquela,Marco Castellani,Alfred Castro-Ginard,P. Charlot,L. Chemin,Andrea Chiavassa,G. Cocozza,G. Costigan,S. Cowell,F. Crifo,M. 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. S. de Souza,A. de Torres,J. Debosscher,E. del Pozo,Marco Delbo,A. Delgado,H. E. Delgado,S. Diakite,C. Diener,E. Distefano,C. Dolding,P. Drazinos,J. Durán,B. Edvardsson,H. Enke,K. Eriksson,P. Esquej,G. Eynard Bontemps,C. Fabre,M. Fabrizio,S. Faigler,A. J. Falcão,M. Farràs Casas,L. Federici,Grigori Fedorets,P. Fernique,F. Figueras,Francesco Filippi,K. Findeisen,A. Fonti,E. Fraile,Morgan Fraser,B. Frézouls,Mario Gai,S. Galleti,D. Garabato,F. García-Sedano,A. Garofalo,N. Garralda,A. Gavel,P. Gavras,J. Gerssen,R. Geyer,P. Giacobbe,Gerard Gilmore,S. Girona,G. Giuffrida,F. Glass,M. Gomes,Mikael Granvik,A. Gueguen,A. Guerrier,J. Guiraud,R. Gutié,R. Haigron,Despina Hatzidimitriou,M. Hauser,M. Haywood,Ulrike Heiter,Amina Helmi,J. Heu,Thomas Hilger,David Hobbs,Werner Hofmann,G. Holland,H. E. Huckle,A. Hypki,V. Icardi,K. Janßen,G. Jevardat de Fombelle,Peter G. Jonker,Attila Juhasz,F. Julbe,A. Karampelas,A. Kewley,Joakim Klar,A. Kochoska,R. Kohley,K. Kolenberg,M. Kontizas,E. Kontizas,Sergey E. Koposov,Georges Kordopatis,Z. Kostrzewa-Rutkowska,P. Koubsky,Sébastien Lambert,Antonino F. Lanza,Y. Lasne,J.-B. Lavigne,Y. Le Fustec,C. Le Poncin-Lafitte,Yveline Lebreton,S. Leccia,N. Leclerc,I. Lecoeur-Taïbi,H. Lenhardt,F. Leroux,S. Liao,E. Licata,H. E. P. Lindstrøm,T. A. Lister,E. Livanou,A. Lobel,M. López,S. Managau,Robert G. Mann,G. Mantelet,O. Marchal,Jon Marchant,Marcella Marconi,S. Marinoni,G. Marschalkó,D. J. Marshall,M. Martino,Gábor Marton,Nicolas Mary,Davide Massari,G. Matijevič,Tsevi Mazeh,Paul J. McMillan,S. Messina,D. Michalik,N. R. Millar,D. Molina,R. Molinaro,L. Molnár,P. Montegriffo,R. Mor,R. Morbidelli,Thierry Morel,D. Morris,A. F. Mulone,T. Muraveva,I. Musella,Gijs Nelemans,Luciano Nicastro,L. Noval,W. O'Mullane,C. Ordénovic,D. Ordóñez-Blanco,P. Osborne,C. Pagani,I. Pagano,F. Pailler,H. Palacin,L. Palaversa,A. Panahi,Michał Pawlak,A. M. Piersimoni,F.-X. Pineau,E. Plachy,G. Plum,E. Poggio,E. Poujoulet,A. Prša,L. Pulone,E. Racero,S. Ragaini,N. Rambaux,M. Ramos-Lerate,S. Regibo,Céline Reylé,F. Riclet,V. Ripepi,A. Riva,A. Rivard,G. Rixon,T. Roegiers,M. Roelens,M. Romero-Gómez,Nicholas Rowell,F. Royer,L. Ruiz-Dern,G. Sadowski,T. Sagristà Sellés,Johannes Sahlmann,J. 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,E. Solano,F. Solitro,R. Sordo,Sonia Nieto,J. Souchay,A. Spagna,Federica Spoto,U. Stampa,Iain A. Steele,H. Steidelmüller,C. A. Stephenson,H. Stoev,F. F. Suess,Jean Surdej,László Szabados,E. Szegedi-Elek,D. Tapiador,F. Taris,G. Tauran,M. B. Taylor,Ramachrisna Teixeira,D. Terrett,P. Teyssandier,W. Thuillot,A. Titarenko,F. Torra Clotet,C. Turon,A. Ulla,E. Utrilla,S. Uzzi,M. Vaillant,G. Valentini,V. Valette,A. van Elteren,E. Van Hemelryck,M. Vaschetto,Alberto Vecchiato,Jovan Veljanoski,Y. Viala,D. Vicente,Steven S. Vogt,C. von Essen,H. Voss,V. Votruba,S. Voutsinas,G. Walmsley,M. Weiler,O. Wertz,T. Wevers,Łukasz Wyrzykowski,A. Yoldas,M. Žerjal,H. Ziaeepour,J. Zorec,Sven Zschocke,Shay Zucker,C. Zurbach,T. Zwitter +451 more
TL;DR: Gaia Data Release 2 provides high-precision astrometry and three-band photometry for about 1.3 billion sources over the full sky as mentioned in this paper, which is unprecedented in both precision and coverage of the various Milky Way stellar populations and stellar evolutionary phases.
Journal ArticleDOI
The Palomar-Green Catalog of Ultraviolet-Excess Stellar Objects
TL;DR: In this paper, the authors present le catalogue de Stromgren et al. which donne les positions avec une precision de 8'', les magnitudes photographiques B a 0,29 mag pres, les types spectraux, des references and les couleurs de Stemgren, and 1715 constituent un echantillon statistiquement complet couvrant 10714 degres carres de 266 champs du Palomar
Journal ArticleDOI
A spectroscopic determination of the mass distribution of DA white dwarfs
TL;DR: In this paper, a mass distribution for a sample of 129 DA white dwarfs is presented, based on fitting hydrogen line profiles to the predictions of stellar atmosphere models, and the atmospheric parameters determined from spectroscopy are shown to be of improved accuracy over those obtained with other techniques.
Journal ArticleDOI
The Formation Rate and Mass and Luminosity Functions of DA White Dwarfs from the Palomar Green Survey
TL;DR: In this paper, the mass distribution of DA white dwarfs from the Palomar Green (PG) survey was derived and the luminosity function of the sample, weighted by 1/Vmax, was obtained and compared with other determinations.
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