Related papers: Double stars and astrometric uncertainties in Gaia…

Gaia Data Release 1: Astrometry - one billion positions, two million proper motions and parallaxes

Gaia Data Release 1 (Gaia DR1) contains astrometric results for more than 1 billion stars brighter than magnitude 20.7 based on observations collected by the Gaia satellite during the first 14 months of its operational phase. We give a…

Astrophysics of Galaxies · Physics 2016-11-30 L. Lindegren , U. Lammers , U. Bastian , J. Hernández , S. Klioner , D. Hobbs , A. Bombrun , D. Michalik , M. Ramos-Lerate , A. Butkevich , G. Comoretto , E. Joliet , B. Holl , A. Hutton , P. Parsons , H. Steidelmüller , U. Abbas , M. Altmann , A. Andrei , S. Anton , N. Bach , C. Barache , U. Becciani , J. Berthier , L. Bianchi , M. Biermann , S. Bouquillon , G. Bourda , T. Brüsemeister , B. Bucciarelli , D. Busonero , T. Carlucci , J. Castañeda , P. Charlot , M. Clotet , M. Crosta , M. Davidson , F. de Felice , R. Drimmel , C. Fabricius , A. Fienga , F. Figueras , E. Fraile , M. Gai , N. Garralda , R. Geyer , J. J. González-Vidal , R. Guerra , N. C. Hambly , M. Hauser , S. Jordan , M. G. Lattanzi , H. Lenhardt , S. Liao , W. Löffler , P. J. McMillan , F. Mignard , A. Mora , R. Morbidelli , J. Portell , A. Riva , M. Sarasso , I. Serraller , H. Siddiqui , R. Smart , A. Spagna , U. Stampa , I. Steele , F. Taris , J. Torra , W. van Reeven , A. Vecchiato , S. Zschocke , J. de Bruijne , G. Gracia , F. Raison , T. Lister , J. Marchant , R. Messineo , M. Soffel , J. Osorio , A. de Torres , W. O'Mullane

Gaia Data Release 1. Summary of the astrometric, photometric, and survey properties

At about 1000 days after the launch of Gaia we present the first Gaia data release, Gaia DR1, consisting of astrometry and photometry for over 1 billion sources brighter than magnitude 20.7. We summarize Gaia DR1 and provide illustrations…

Instrumentation and Methods for Astrophysics · Physics 2016-09-15 Gaia Collaboration , A. G. A. Brown , A. Vallenari , T. Prusti , J. de Bruijne , F. Mignard , R. Drimmel , 585 co-authors

Speckle Interferometry of 25 Gaia Two-Parameter Potential Binaries

Gaia two-parameter (G2P) stars have cumulative errors in parallax and proper motion so great that only their mean positions were reported in DR3. One potential cause of these high errors is another star as indicated by two intensity peaks…

Solar and Stellar Astrophysics · Physics 2026-04-07 Paul McCudden , Russell Genet , John Major , Zachary Hartman , A. U. Kovic , Rick Wasson , Michael-James Ellis , Lou Jackson , Bradley Brungardt , Zaida Weems , Astrid Wehlitz , Evan Wille , Leon Bewersdorff , Nick Hardy , Rachel Freed , David Rowe , Thomas C. Smith , Reed Estrada , Thomas Meneghini , Reggie Jones , Tom Mason , Dwight Collins , Mark Copper

Gaia Data Release 1. Open cluster astrometry: performance, limitations, and future prospects

Context. The first Gaia Data Release contains the Tycho-Gaia Astrometric Solution (TGAS). This is a subset of about 2 million stars for which, besides the position and photometry, the proper motion and parallax are calculated using…

Solar and Stellar Astrophysics · Physics 2017-04-26 Gaia Collaboration , F. van Leeuwen , A. Vallenari , C. Jordi , L. Lindegren , U. Bastian , T. Prusti , J. H. J. de Bruijne , A. G. A. Brown , C. Babusiaux , C. A. L. Bailer-Jones , M. Biermann , D. W. Evans , L. Eyer , F. Jansen , S. A. Klioner , U. Lammers , X. Luri , F. Mignard , C. Panem , D. Pourbaix , S. Randich , P. Sartoretti , H. I. Siddiqui , C. Soubiran , V. Valette , N. A. Walton , C. Aerts , F. Arenou , M. Cropper , R. Drimmel , E. Høg , D. Katz , M. G. Lattanzi , W. O'Mullane , E. K. Grebel , A. D. Holland , C. Huc , X. Passot , M. Perryman , L. Bramante , C. Cacciari , J. Castañeda , L. Chaoul , N. Cheek , F. De Angeli , C. Fabricius , R. Guerra , J. Hernández , A. Jean-Antoine-Piccolo , E. Masana , R. Messineo , N. Mowlavi , K. Nienartowicz , D. Ordóñez-Blanco , P. Panuzzo , J. Portell , P. J. Richards , M. Riello , G. M. Seabroke , P. Tanga , F. Thévenin , J. Torra , S. G. Els , G. Gracia-Abril , G. Comoretto , M. Garcia-Reinaldos , T. Lock , E. Mercier , M. Altmann , R. Andrae , T. L. Astraatmadja , I. Bellas-Velidis , K. Benson , J. Berthier , R. Blomme , G. Busso , B. Carry , A. Cellino , G. Clementini , S. Cowell , O. Creevey , J. Cuypers , M. Davidson , J. De Ridder , A. de Torres , L. Delchambre , A. Dell'Oro , C. Ducourant , Y. Frémat , M. García-Torres , E. Gosset , J. -L. Halbwachs , N. C. Hambly , D. L. Harrison , M. Hauser , D. Hestroffer , S. T. Hodgkin , H. E. Huckle , A. Hutton , G. Jasniewicz , S. Jordan , M. Kontizas , A. J. Korn , A. C. Lanzafame , M. Manteiga , A. Moitinho , K. Muinonen , J. Osinde , E. Pancino , T. Pauwels , J. -M. Petit , A. Recio-Blanco , A. C. Robin , L. M. Sarro , C. Siopis , M. Smith , K. W. Smith , A. Sozzetti , W. Thuillot , W. van Reeven , Y. Viala , U. Abbas , A. Abreu Aramburu , S. Accart , J. J. Aguado , P. M. Allan , W. Allasia , G. Altavilla , M. A. Álvarez , J. Alves , R. I. Anderson , A. H. Andrei , E. Anglada Varela , E. Antiche , T. Antoja , S. Antón , B. Arcay , N. Bach , S. G. Baker , L. Balaguer-Núñez , C. Barache , C. Barata , A. Barbier , F. Barblan , D. Barrado y Navascués , M. Barros , M. A. Barstow , U. Becciani , M. Bellazzini , A. Bello García , V. Belokurov , P. Bendjoya , A. Berihuete , L. Bianchi , O. Bienaymé , F. Billebaud , N. Blagorodnova , S. Blanco-Cuaresma , T. Boch , A. Bombrun , R. Borrachero , S. Bouquillon , G. Bourda , H. Bouy , A. Bragaglia , M. A. Breddels , N. Brouillet , T. Brüsemeister , B. Bucciarelli , P. Burgess , R. Burgon , A. Burlacu , D. Busonero , R. Buzzi , E. Caffau , J. Cambras , H. Campbell , R. Cancelliere , T. Cantat-Gaudin , T. Carlucci , J. M. Carrasco , M. Castellani , P. Charlot , J. Charnas , A. Chiavassa , M. Clotet , G. Cocozza , R. S. Collins , G. Costigan , F. Crifo , N. J. G. Cross , M. Crosta , C. Crowley , C. Dafonte , Y. Damerdji , A. Dapergolas , P. David , M. David , P. De Cat , F. de Felice , P. de Laverny , F. De Luise , R. De March , D. de Martino , R. de Souza , J. Debosscher , E. del Pozo , M. Delbo , A. Delgado , H. E. Delgado , P. Di Matteo , S. Diakite , E. Distefano , C. Dolding , S. Dos Anjos , P. Drazinos , J. Durán , Y. Dzigan , B. Edvardsson , H. Enke , N. W. Evans , G. Eynard Bontemps , C. Fabre , M. Fabrizio , S. Faigler , A. J. Falcão , M. Farràs Casas , L. Federici , G. Fedorets , J. Fernández-Hernández , P. Fernique , A. Fienga , F. Figueras , F. Filippi , K. Findeisen , A. Fonti , M. Fouesneau , E. Fraile , M. Fraser , J. Fuchs , M. Gai , S. Galleti , L. Galluccio , D. Garabato , F. García-Sedano , A. Garofalo , N. Garralda , P. Gavras , J. Gerssen , R. Geyer , G. Gilmore , S. Girona , G. Giuffrida , M. Gomes , A. González-Marcos , J. González-Núñez , J. J. González-Vidal , M. Granvik , A. Guerrier , P. Guillout , J. Guiraud , A. Gúrpide , R. Gutiérrez-Sánchez , L. P. Guy , R. Haigron , D. Hatzidimitriou , M. Haywood , U. Heiter , A. Helmi , D. Hobbs , W. Hofmann , B. Holl , G. Holland , J. A. S. Hunt , A. Hypki , V. Icardi , M. Irwin , G. Jevardat de Fombelle , P. Jofré , P. G. Jonker , A. Jorissen , F. Julbe , A. Karampelas , A. Kochoska , R. Kohley , K. Kolenberg , E. Kontizas , S. E. Koposov , G. Kordopatis , P. Koubsky , A. Krone-Martins , M. Kudryashova , I. Kull , R. K. Bachchan , F. Lacoste-Seris , A. F. Lanza , J. -B. Lavigne , C. Le Poncin-Lafitte , Y. Lebreton , T. Lebzelter , S. Leccia , N. Leclerc , I. Lecoeur-Taibi , V. Lemaitre , H. Lenhardt , F. Leroux , S. Liao , E. Licata , H. E. P. Lindstrøm , T. A. Lister , E. Livanou , A. Lobel , W. Löffer , M. López , D. Lorenz , I. MacDonald , T. Magalhães Fernandes , S. Managau , R. G. Mann , G. Mantelet , O. Marchal , J. M. Marchant , M. Marconi , S. Marinoni , P. M. Marrese , G. Marschalkó , D. J. Marshall , J. M. Martín-Fleitas , M. Martino , N. Mary , G. Matijevič , T. Mazeh , P. J. McMillan , S. Messina , D. Michalik , N. R. Millar , B. M. H. Miranda , D. Molina , R. Molinaro , M. Molinaro , L. Molnár , M. Moniez , P. Montegrio , R. Mor , A. Mora , R. Morbidelli , T. Morel , S. Morgenthaler , D. Morris , A. F. Mulone , T. Muraveva , I. Musella , J. Narbonne , G. Nelemans , L. Nicastro , L. Noval , C. Ordénovic , J. Ordieres-Meré , P. Osborne , C. Pagani , I. Pagano , F. Pailler , H. Palacin , L. Palaversa , P. Parsons , M. Pecoraro , R. Pedrosa , H. Pentikäinen , B. Pichon , A. M. Piersimoni , F. -X. Pineau , E. Plachy , G. Plum , E. Poujoulet , A. Prša , L. Pulone , S. Ragaini , S. Rago , N. Rambaux , M. Ramos-Lerate , P. Ranalli , G. Rauw , A. Read , S. Regibo , C. Reylé , R. A. Ribeiro , L. Rimoldini , V. Ripepi , A. Riva , G. Rixon , M. Roelens , M. Romero-Gómez , N. Rowell , F. Royer , L. Ruiz-Dern , G. Sadowski , T. Sagristà Sellés , J. Sahlmann , J. Salgado , E. Salguero , M. Sarasso , H. Savietto , M. Schultheis , E. Sciacca , M. Segol , J. C. Segovia , D. Segransan , I-C. Shih , R. Smareglia , R. L. Smart , E. Solano , F. Solitro , R. Sordo , S. Soria Nieto , J. Souchay , A. Spagna , F. Spoto , U. Stampa , I. A. Steele , H. Steidelmüller , C. A. Stephenson , H. Stoev , F. F. Suess , M. Süveges , J. Surdej , L. Szabados , E. Szegedi-Elek , D. Tapiador , F. Taris , G. Tauran , M. B. Taylor , R. Teixeira , D. Terrett , B. Tingley , S. C. Trager , C. Turon , A. Ulla , E. Utrilla , G. Valentini , A. van Elteren , E. Van Hemelryck , M. van Leeuwen , M. Varadi , A. Vecchiato , J. Veljanoski , T. Via , D. Vicente , S. Vogt , H. Voss , V. Votruba , S. Voutsinas , G. Walmsley , M. Weiler , K. Weingril , T. Wevers , Ł. Wyrzykowski , A. Yoldas , M. Žerjal , S. Zucker , C. Zurbach , T. Zwitter , A. Alecu , M. Allen , C. Allende Prieto , A. Amorim , G. Anglada-Escudé , V. Arsenijevic , S. Azaz , P. Balm , M. Beck , H. -H. Bernsteiny , L. Bigot , A. Bijaoui , C. Blasco , M. Bonfigli , G. Bono , S. Boudreault , A. Bressan , S. Brown , P. -M. Brunet , P. Bunclarky , R. Buonanno , A. G. Butkevich , C. Carret , C. Carrion , L. Chemin , F. Chéreau , L. Corcione , E. Darmigny , K. S. de Boer , P. de Teodoro , P. T. de Zeeuw , C. Delle Luche , C. D. Domingues , P. Dubath , F. Fodor , B. Frézouls , A. Fries , D. Fustes , D. Fyfe , E. Gallardo , J. Gallegos , D. Gardio , M. Gebran , A. Gomboc , A. Gómez , E. Grux , A. Gueguen , A. Heyrovsky , J. Hoar , G. Iannicola , Y. Isasi Parache , A. -M. Janotto , E. Joliet , A. Jonckheere , R. Keil , D. -W. Kim , P. Klagyivik , J. Klar , J. Knude , O. Kochukhov , I. Kolka , J. Kos , A. Kutka , V. Lainey , D. LeBouquin , C. Liu , D. Loreggia , V. V. Makarov , M. G. Marseille , C. Martayan , O. Martinez-Rubi , B. Massart , F. Meynadier , S. Mignot , U. Munari , A. -T. Nguyen , T. Nordlander , K. S. O'Flaherty , P. Ocvirk , A. Olias Sanz , P. Ortiz , J. Osorio , D. Oszkiewicz , A. Ouzounis , M. Palmer , P. Park , E. Pasquato , C. Peltzer , J. Peralta , F. Péturaud , T. Pieniluoma , E. Pigozzi , J. Poelsy , G. Prat , T. Prod'homme , F. Raison , J. M. Rebordao , D. Risquez , B. Rocca-Volmerange , S. Rosen , M. I. Ruiz-Fuertes , F. Russo , S. Sembay , I. Serraller Vizcaino , A. Short , A. Siebert , H. Silva , D. Sinachopoulos , E. Slezak , M. Soffel , D. Sosnowska , V. Straižys , M. ter Linden , D. Terrell , S. Theil , C. Tiede , L. Troisi , P. Tsalmantza , D. Tur , M. Vaccari , F. Vachier , P. Valles , W. Van Hamme , L. Veltz , J. Virtanen , J. -M. Wallut , R. Wichmann , M. I. Wilkinson , H. Ziaeepour , S. Zschocke

Gaia: on the road to DR2

The second Gaia data release (DR2) is scheduled for April 2018. While Gaia DR1 had increased the number of stars with parallaxes by a factor 20 with respect to the Hipparcos catalogue, Gaia DR2 will bring another factor 500 increase, with…

Astrophysics of Galaxies · Physics 2017-11-06 D. Katz , A. G. A. Brown

Distance Dependent Offsets between Parallaxes for Nearby Stars and Gaia DR1 Parallaxes

We use 612 single stars with previously published trigonometric parallaxes placing them within 25 pc to evaluate parallaxes released in Gaia's first data release (DR1). We find that the Gaia parallaxes are, on average, $0.24 \pm 0.02$ mas…

Solar and Stellar Astrophysics · Physics 2016-11-23 Wei-Chun Jao , Todd J. Henry , Adric R. Riedel , Jennifer G. Winters , Kenneth J. Slatten , Douglas R. Gies

Gaia Data Release 2: The astrometric solution

Gaia Data Release 2 (Gaia DR2) contains results for 1693 million sources in the magnitude range 3 to 21 based on observations collected by the European Space Agency Gaia satellite during the first 22 months of its operational phase. We…

Instrumentation and Methods for Astrophysics · Physics 2018-08-15 L. Lindegren , J. Hernandez , A. Bombrun , S. Klioner , U. Bastian , M. Ramos-Lerate , A. de Torres , H. Steidelmuller , C. Stephenson , D. Hobbs , U. Lammers , M. Biermann , R. Geyer , T. Hilger , D. Michalik , U. Stampa , P. J. McMillan , J. Castaneda , M. Clotet , G. Comoretto , M. Davidson , C. Fabricius , G. Gracia , N. C. Hambly , A. Hutton , A. Mora , J. Portell , F. van Leeuwen , U. Abbas , A. Abreu , M. Altmann , A. Andrei , E. Anglada , L. Balaguer-Nunez , C. Barache , U. Becciani , S. Bertone , L. Bianchi , S. Bouquillon , G. Bourda , T. Brusemeister , B. Bucciarelli , D. Busonero , R. Buzzi , R. Cancelliere , T. Carlucci , P. Charlot , N. Cheek , M. Crosta , C. Crowley , J. de Bruijne , F. de Felice , R. Drimmel , P. Esquej , A. Fienga , E. Fraile , M. Gai , N. Garralda , J. J. Gonzalez-Vidal , R. Guerra , M. Hauser , W. Hofmann , B. Holl , S. Jordan , M. G. Lattanzi , H. Lenhardt , S. Liao , E. Licata , T. Lister , W. Loffler , J. Marchant , J. -M. Martin-Fleitas , R. Messineo , F. Mignard , R. Morbidelli , E. Poggio , A. Riva , N. Rowell , E. Salguero , M. Sarasso , E. Sciacca , H. Siddiqui , R. L. Smart , A. Spagna , I. Steele , F. Taris , J. Torra , A. van Elteren , W. van Reeven , A. Vecchiato

Gaia Data Release 2: using Gaia parallaxes

The second Gaia data release (GDR2) provides precise five-parameter astrometric data (positions, proper motions and parallaxes) for an unprecedented amount of sources (more than $1.3$ billion, mostly stars). The use of this wealth of…

Instrumentation and Methods for Astrophysics · Physics 2018-08-15 X. Luri , A. G. A. Brown , L. M. Sarro , F. Arenou , C. A. L. Bailer-Jones , A. Castro-Ginard , J. de Bruijne , T. Prusti , C. Babusiaux , H. E. Delgado

Two-epoch orbit estimation for wide binaries resolved in Hipparcos and Gaia

The Hipparcos catalog and its Double and Multiple System Annex (DMSA) lists 4099 components with individual proper motions and coordinates on the epoch 1991.25. Many of these long-period binary stars are also present in the Gaia Data…

Solar and Stellar Astrophysics · Physics 2020-12-02 Valeri V. Makarov

The Gaia sky: version 1.0

In this contribution I provide a brief summary of the contents of Gaia DR1. This is followed by a discussion of studies in the literature that attempt to characterize the quality of the Tycho-Gaia Astrometric Solution parallaxes in Gaia…

Astrophysics of Galaxies · Physics 2018-06-13 Anthony G. A. Brown

Comoving stars in Gaia DR1: An abundance of very wide separation co-moving pairs

The primary sample of the {\it Gaia} Data Release 1 is the Tycho-Gaia Astrometric Solution (TGAS): $\approx$ 2 million Tycho-2 sources with improved parallaxes and proper motions relative to the initial catalog. This increased astrometric…

Solar and Stellar Astrophysics · Physics 2017-06-05 Semyeong Oh , Adrian M. Price-Whelan , David W. Hogg , Timothy D. Morton , David N. Spergel

Estimating distances from parallaxes IV: Distances to 1.33 billion stars in Gaia Data Release 2

For the vast majority of stars in the second Gaia data release, reliable distances cannot be obtained by inverting the parallax. A correct inference procedure must instead be used to account for the nonlinearity of the transformation and…

Solar and Stellar Astrophysics · Physics 2018-08-08 C. A. L. Bailer-Jones , J. Rybizki , M. Fouesneau , G. Mantelet , R. Andrae

Gaia and VLT astrometry of faint stars: Precision of Gaia DR1 positions and updated VLT parallaxes of ultracool dwarfs

We compared positions of the Gaia first data release (DR1) secondary data set at its faint limit with CCD positions of stars in 20 fields observed with the VLT/FORS2 camera. The FORS2 position uncertainties are smaller than one…

Instrumentation and Methods for Astrophysics · Physics 2017-10-25 P. F. Lazorenko , J. Sahlmann

Visual binary stars with known orbits in Gaia EDR3

3350 objects from the Sixth catalog of orbits of visual binary stars (ORB6) are investigated to validate Gaia EDR3 parallaxes and provide mass estimates for the systems. We show that 2/3 of binaries with 0.2 - 0.5 arcsec separation are left…

Solar and Stellar Astrophysics · Physics 2022-10-12 Dmitry Chulkov , Oleg Malkov

Modeling and Calibration of Gaia, Hipparcos, and Tycho-2 astrometric data for the detection of dark companions

Hidden within the Gaia satellite's multiple data releases lies a valuable cache of dark companions. To facilitate the efficient and reliable detection of these companions via combined analyses involving Gaia, Hipparcos, and Tycho-2…

Solar and Stellar Astrophysics · Physics 2024-02-08 Fabo Feng , Yicheng Rui , Yifan Xuan , Hugh R. A. Jones

A test of Gaia Data Release 1 parallaxes: implications for the local distance scale

We present a comparison of Gaia Data Release 1 (DR1) parallaxes with photometric parallaxes for a sample of 212 Galactic Cepheids at a median distance of 2~kpc, and explore their implications on the distance scale and the local value of the…

Instrumentation and Methods for Astrophysics · Physics 2017-03-08 Stefano Casertano , Adam G. Riess , Beatrice Bucciarelli , Mario G. Lattanzi

Comparison of Gaia and Hipparcos parallaxes of close visual binary stars and the impact on determinations of their masses

Precise measurement of the fundamental parameters of stellar systems, including mass and radius, depends critically on how well the stellar distances are known. Astrometry from space provides parallax measurements of unprecented accuracy,…

Solar and Stellar Astrophysics · Physics 2021-11-10 Mashhoor Ahmad Al-Wardat , Abdallah M. Hussein , Hamid M. Al-Naimiy , Martin A. Barstow

A million binaries from Gaia eDR3: sample selection and validation of Gaia parallax uncertainties

We construct from Gaia eDR3 an extensive catalog of spatially resolved binary stars within $\approx$ 1 kpc of the Sun, with projected separations ranging from a few au to 1 pc. We estimate the probability that each pair is a chance…

Solar and Stellar Astrophysics · Physics 2021-02-17 Kareem El-Badry , Hans-Walter Rix , Tyler M. Heintz

Detecting New Visual Binaries in Gaia DR3 with Gaia and 2MASS Photometry I. New Candidate Binaries Within 200 pc of the Sun

We present a method to identify likely visual binaries in Gaia eDR3 that does not rely on parallax or proper motion. This method utilizes the various PSF sizes of 2MASS/Gaia, where at $<2.5$" two stars may be unresolved in 2MASS but…

Solar and Stellar Astrophysics · Physics 2023-11-03 Ilija Medan , Sébastien Lépine

The Hipparcos-Gaia Catalog of Accelerations

This paper presents a cross-calibrated catalog of Hipparcos and Gaia astrometry to enable their use in measuring changes in proper motion, i.e., accelerations in the plane of the sky. The final catalog adopts the reference frame of the…

Solar and Stellar Astrophysics · Physics 2018-12-12 Timothy D. Brandt