Listar por autor "Álvarez, M. A."

Mostrando ítems 1-20 de 29

    • Analysis and Knowledge Discovery by Means of Self-Organizing Maps for Gaia Data Releases 

      Álvarez, M. A.; Dafonte, Carlos; Garabato, D.; Manteiga, Minia (Springer, 2016)
      [Abstract]: A billion stars: this is the approximate amount of visible objects estimated to be observed by the Gaia satellite, representing roughly 1 % of the objects in the Galaxy. It constitutes the biggest amount of ...

    • Distributed Fast Self-Organized Maps for Massive Spectrophotometric Data Analysis 

      Dafonte, Carlos; Garabato, D.; Álvarez, M. A.; Manteiga, Minia (MDPI AG, 2018-05-03)
      [Abstract] Analyzing huge amounts of data becomes essential in the era of Big Data, where databases are populated with hundreds of Gigabytes that must be processed to extract knowledge. Hence, classical algorithms must be ...

    • Distributed Fast Self-Organized Maps for Massive Spectrophotometric Data Analysis 

      Dafonte, Carlos; Garabato, D.; Álvarez, M. A.; Manteiga, Minia (MDPI, 2018-11)
      [Abstract]: Analyzing huge amounts of data becomes essential in the era of Big Data, where databases are populated with hundreds of Gigabytes that must be processed to extract knowledge. Hence, classical algorithms must ...

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

      Brown, A. G. A.; Vallenari, A.; Prusti, T.; Bruijne, J. H.J. de; Manteiga, M.; Álvarez, M. A.; Arcay, B.; Dafonte, C.; Garabato, D.; Fustes, D. (EDP Sciences, 2016-11)
      [Abstract]: Context. 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. Aims. A ...

    • Gaia Data Release 2: Summary of the contents and survey properties 

      Brown, A. G. A.; Vallenari, A.; Prusti, T.; Bruijne, J. H.J. de; Babusiaux, C.; Manteiga, M.; Álvarez, M. A.; Arcay, B.; Dafonte, C.; Garabato, D. (EDP Sciences, 2018-08)
      [Abstract]: Context. We present the second Gaia data release, Gaia DR2, consisting of astrometry, photometry, radial velocities, and information on astrophysical parameters and variability, for sources brighter than magnitude ...

    • Gaia Data Release 3: Analysis of the Gaia BP/RP spectra using the General Stellar Parameterizer from Photometry 

      Andrae, R.; Álvarez, M. A.; Dafonte, Carlos; Garabato, D.; Gómez, Ángel; González Santamaría, I.; Manteiga, Minia; Pallas-Quintela, Lara; Santoveña, Raúl; Silvelo, Arturo; Torralba Elipe, Guillermo (EDP Sciences, 2023-06)
      [Abstract]: Context. The astrophysical characterisation of sources is among the major new data products in the third Gaia Data Release (DR3). In particular, there are stellar parameters for 471 million sources estimated ...

    • Gaia Data Release 3: Apsis. II. Stellar parameters 

      Fouesneau, M.; Álvarez, M. A.; Garabato, D.; Dafonte, Carlos; Gómez, Ángel; González Santamaría, I.; Manteiga, Minia; Pallas-Quintela, Lara; Santoveña, Raúl; Silvelo, Arturo; Torralba Elipe, Guillermo (EDP Sciences, 2023-06)
      [Abstract]: Context. The third Gaia data release (Gaia DR3) contains, beyond the astrometry and photometry, dispersed light for hundreds of millions of sources from the Gaia prism spectra (BP and RP) and the spectrograph ...

    • Gaia Data Release 3: Apsis. III. Non-stellar content and source classification 

      Delchambre, L.; Garabato, D.; Dafonte, Carlos; Manteiga, Minia; Silvelo, Arturo; Álvarez, M. A.; Gómez, Ángel; González Santamaría, I.; Pallas-Quintela, Lara; Santoveña, Raúl; Torralba Elipe, Guillermo (EDP Sciences, 2023-06)
      [Abstract]: Context. As part of the third Gaia Data Release, we present the contributions of the non-stellar and classification modules from the eighth coordination unit (CU8) of the Data Processing and Analysis Consortium, ...

    • Gaia Data Release 3: Astrophysical parameters inference system (Apsis). I. Methods and content overview 

      Creevey, O. L.; Garabato, D.; Torralba Elipe, Guillermo; Álvarez, M. A.; Dafonte, Carlos; Gómez, Ángel; González Santamaría, I.; Manteiga, Minia; Pallas-Quintela, Lara; Santoveña, Raúl; Silvelo, Arturo (EDP Sciences, 2023-06)
      [Abstract]: Gaia Data Release 3 contains a wealth of new data products for the community. Astrophysical parameters are a major component of this release, and were produced by the Astrophysical parameters inference system ...

    • Gaia Data Release 3: Catalogue validation 

      Babusiaux, C.; Álvarez, M. A.; Dafonte, Carlos; Manteiga, Minia; Santoveña, Raúl; Torralba Elipe, Guillermo (EDP Sciences, 2023-06)
      [Abstract]: Context. The third Gaia data release (DR3) provides a wealth of new data products. The early part of the release, Gaia EDR3, already provided the astrometric and photometric data for nearly two billion sources. ...

    • Gaia Data Release 3: Chemical cartography of the Milky Way 

      Recio-Blanco, A.; Garabato, D.; Álvarez, M. A.; Dafonte, Carlos; Gómez, Ángel; González Santamaría, I.; Pallas-Quintela, Lara; Santoveña, Raúl; Silvelo, Arturo; Torralba Elipe, Guillermo; Manteiga, Minia (EDP Sciences, 2023-06)
      [Abstract]: Context. The motion of stars has been used to reveal details of the complex history of the Milky Way, in constant interaction with its environment. Nevertheless, to reconstruct the Galactic history puzzle in ...

    • Gaia Data Release 3: Exploring and mapping the diffuse interstellar band at 862 nm 

      Schultheis, M.; Garabato, D.; Álvarez, M. A.; Dafonte, Carlos; Gómez, Ángel; Manteiga, Minia; González Santamaría, I.; Pallas-Quintela, Lara; Santoveña, Raúl; Silvelo, Arturo; Torralba Elipe, Guillermo (EDP Sciences, 2023-01)
      [Abstract]: Context. Diffuse interstellar bands (DIBs) are common interstellar absorption features in spectroscopic observations but their origins remain unclear. DIBs play an important role in the life cycle of the ...

    • Gaia Data Release 3: Stellar chromospheric activity and mass accretion from Ca II IRT observed by the Radial Velocity Spectrometer 

      Lanzafame, A. C.; Álvarez, M. A.; Dafonte, Carlos; Garabato, D.; Gómez, Ángel; González Santamaría, I.; Manteiga, Minia; Pallas-Quintela, Lara; Santoveña, Raúl; Silvelo, Arturo; Torralba Elipe, Guillermo (EDP Sciences, 2023-06)
      [Abstract]: Context. The Gaia Radial Velocity Spectrometer (RVS) provides the unique opportunity of a spectroscopic analysis of millions of stars at medium resolution (λ/I λ'a '11'500) in the near-infrared (845'872 nm). ...

    • Gaia Data Release 3: The extragalactic content 

      Bailer-Jones, C. A. L.; Garabato, D.; Álvarez, M. A.; Dafonte, Carlos; Gómez, Ángel; González Santamaría, I.; Manteiga, Minia; Pallas-Quintela, Lara; Santoveña, Raúl; Silvelo, Arturo; Torralba Elipe, Guillermo (EDP Sciences, 2023-06)
      [Abstract]: The Gaia Galactic survey mission is designed and optimized to obtain astrometry, photometry, and spectroscopy of nearly two billion stars in our Galaxy. Yet as an all-sky multi-epoch survey, Gaia also observes ...

    • Gaia Data Release 3: The Galaxy in your preferred colours: Synthetic photometry from Gaia low-resolution spectra 

      Montegriffo, P.; Garabato, D.; Manteiga, Minia; Santoveña, Raúl; Álvarez, M. A.; Dafonte, Carlos; Gómez, Ángel; González Santamaría, I.; Pallas-Quintela, Lara; Silvelo, Arturo; Torralba Elipe, Guillermo (EDP Sciences, 2023-06)
      [Abstract]: Gaia Data Release 3 provides novel flux-calibrated low-resolution spectrophotometry for '220 million sources in the wavelength range 330 nm ≤ λ ≤ 1050 nm (XP spectra). Synthetic photometry directly tied to a ...

    • Gaia Early Data Release 3: Acceleration of the Solar System from Gaia Astrometry 

      Manteiga, Minia; Álvarez, M. A.; Dafonte, Carlos; Garabato, D.; Gómez García, Ángel; González Santamaría, I.; Santoveña, Raúl (EDP Sciences, 2021)
      [Abstract] Context. Gaia Early Data Release 3 (Gaia EDR3) provides accurate astrometry for about 1.6 million compact (QSO-like) extragalactic sources, 1.2 million of which have the best-quality five-parameter astrometric ...

    • Gaia Early Data Release 3: Structure and Properties of the Magellanic Clouds 

      Manteiga, Minia; Álvarez, M. A.; Dafonte, Carlos; Garabato, D.; Gómez García, Ángel; González Santamaría, I.; Santoveña, Raúl (EDP Sciences, 2021)
      [Abstract] Context. This work is part of the Gaia Data Processing and Analysis Consortium papers published with the Gaia Early Data Release 3 (EDR3). It is one of the demonstration papers aiming to highlight the improvements ...

    • Gaia Early Data Release 3: Summary of the Contents and Survey Properties 

      Manteiga, Minia; Álvarez, M. A.; Dafonte, Carlos; Garabato, D.; Gómez García, Ángel; González Santamaría, I.; Santoveña, Raúl (EDP Sciences, 2021)
      [Abstract] Context. We present the early installment of the third Gaia data release, Gaia EDR3, consisting of astrometry and photometry for 1.8 billion sources brighter than magnitude 21, complemented with the list of ...

    • Gaia Early Data Release 3: The celestial reference frame (Gaia-CRF3) 

      Klioner, Sergei; Lindegren, Lennart; Mignard, François; Hernández, J.; Ramos-Lerate, M.; Bastian, U.; Biermann, M.; Bombrun, A.; Torres, A. de; Gerlach, E.; Geyer, R.; Hilger, T.; Hobbs, D.; Lammers, U. L.; McMillan, P. J.; Steidelmüller, H.; Teyssier, D.; Raiteri, C. M.; Bartolomé, S.; Bernet, M.; Castañeda, J.; Clotet, M.; Davidson, M.; Fabricius, C.; Garralda Torres, N.; González-Vidal, J. J.; Portell, J.; Rowell, N.; Torra, F.; Torra, J.; Brown, A. G. A.; Vallenari, A.; Prusti1, T.; de Bruijne, J. H. J.; Arenou, F.; Babusiaux, C.; Creevey, O. L.; Ducourant, C.; Evans, D. W.; Eyer, L.; Guerra, R.; Hutton, A.; Jordi, C.; Luri, X.; Panem, C.; Pourbaix, D.; Randich, S.; Sartoretti, P.; Soubiran, C.; Tanga, P.; Walton, N. A.; Bailer-Jones, C. A. L.; Drimmel, R.; Jansen, F.; Katz, D.; Lattanzi, M. G.; van Leeuwen, F.; Bakker, J.; Cacciari, C.; De Angeli, F.; Fouesneau, M.; Frémat, Y.; Galluccio, L.; Guerrier, A.; Heiter, U.; Masana, E.; Messineo, R.; Mowlavi, N.; Nicolas, C.; Nienartowicz, K.; Pailler, F.; Panuzzo, P.; Riclet, F.; Roux, W.; Seabroke, G. M.; Sordo, R.; Thévenin, F.; Gracia-Abril, G.; Altmann, M.; Andrae, R.; Audard, M.; Bellas-Velidis, I.; Benson, K.; Berthier, J.; Blomme, R.; Burgess, P. W.; Busonero, D.; Busso, G.; Cánovas, H.; Carry, B.; Cellino, A.; Cheek, N.; Clementini, G.; Damerdji, Y.; de Teodoro, P.; Núñez Campos, M.; Delchambre, L.; Dell’Oro, A.; Esquej, P.; Fernández-Hernández, J.; Fraile, E.; Garabato, D.; García-Lario, P.; Gosset, E.; Haigron, R.; Halbwachs, J.-L.; Hambly, N. C.; Harrison, D. L.; Hestroffer, D.; Hodgkin, S. T.; Holl, B.; Janßen, K.; Jevardat de Fombelle, G.; Jordan, S.; Krone-Martins, A.; Lanzafame, A. C.; Löffler, W.; Marchal, O.; Marrese, P. M.; Moitinho, A.; Muinonen, K.; Osborne, P.; Pancino, E.; Pauwels, T.; Recio-Blanco, A.; Reylé, C.; Riello, M.; Rimoldini, L.; Roegiers, T.; Rybizki, J.; Sarro, L. M.; Siopis, C.; Smith, M.; Sozzetti, A.; Utrilla, E.; van Leeuwen, M.; Abbas, U.; Ábrahám, P.; Abreu Aramburu, A.; Aerts, C.; Aguado, J. J.; Ajaj, M.; Aldea-Montero, F.; Altavilla, G.; Álvarez, M. A.; Alves, J.; Anderson, R. I.; Anglada Varela, E.; Antoja, T.; Baines, D.; Baker, Steven; Balaguer-Núñez, L.; Balbinot, E.; Balog, Z.; Barache, C.; Barbato, D.; Barros, M.; Barstow, M. A.; Bassilana, J.-L.; Bauchet, N.; Becciani, U.; Bellazzini, M.; Berihuete, A.; Bertone, S.; Bianchi, L.; Binnenfeld, A.; Blanco-Cuaresma, S.; Boch, T.; Bossini, D.; Bouquillon, S.; Bragaglia, A.; Bramante, L.; Breedt, E.; Bressan, A.; Brouillet, N.; Brugaletta, E.; Bucciarelli, B.; Burlacu, A.; Butkevich, A. G.; Buzzi, R.; Caffau, E.; Cancelliere, R.; Cantat-Gaudin, T.; Carballo, R.; Carlucci, T.; Carnerero, M. I.; Carrasco, J. M.; Casamiquela, L.; Castellani, M.; Castro-Ginard, A.; Chaoul, L.; Charlot, P.; Chemin, L.; Chiaramida, V.; Chiavassa, A.; Chornay, N.; Comoretto, G.; Contursi, G.; Cooper, W. J.; Cornez, T.; Cowell, S.; Crifo, F.; Cropper, M.; Crosta, M.; Crowley, C.; Dafonte, Carlos; Dapergolas, A.; David, P.; Laverny, P. de; De Luise, F.; De March, R.; De Ridder, J.; de Souza, R.; Peloso, E. F. del; Pozo, E. del; Delbo, M.; Delgado, A.; Delisle, J.-B.; Demouchy, C.; Dharmawardena, T. E.; Diakite, S.; Diener, C.; Distefano, E.; Dolding, C.; Enke, H.; Fabre, C.; Fabrizio, M.; Faigler, S.; Fedorets, G.; Fernique, P.; Fienga, A.; Figueras, F.; Fournier, Y.; Fouron, C.; Fragkoudi, F.; Gai, M.; García-Gutiérrez, A.; García-Reinaldos, M.; García-Torres, M.; Garofalo, A.; Gavel, A.; Gavras, P.; Giacobbe, P.; Gilmore, G.; Girona, S.; Giuffrida, G.; Gomel, R.; Gómez, Ángel; González-Núñez, J.; González Santamaría, I.; Granvik, M.; Guillout, P.; Guiraud, J.; Gutiérrez-Sánchez, R.; Guy, L. P.; Hatzidimitriou, D.; Hauser, M.; Haywood, M.; Helmer, A.; Helmi, A.; Sarmiento, M. H.; Hidalgo, S. L.; Hładczuk, N.; Holland, G.; Huckle, H. E.; Jardine, K.; Jasniewicz, G.; Jean-Antoine Piccolo, A.; Jiménez-Arranz, Ó.; Juaristi Campillo, J.; Julbe, F.; Karbevska, L.; Kervella, P.; Khanna, S.; Kordopatis, G.; Korn, A. J.; Kóspál, Á.; Kostrzewa-Rutkowska, Z.; Kruszynska, K.; Kun, M.; Laizeau, P.; Lambert, S.; Lanza, A. F.; Lasne, Y.; Le Campion, J.-F.; Lebreton, Y.; Lebzelter, T.; Leccia, S.; Leclerc, N.; Lecoeur-Taibi, I.; Liao, S.; Licata, E. L.; Lindstrøm, H. E. P.; Lister, T. A.; Livanou, E; Lobel, A.; Lorca, A.; Loup, C.; Madrero Pardo, P.; Magdaleno Romeo, A.; Managau, S.; Mann, R. G.; Manteiga, Minia; Marchant, J. M.; Marconi, M.; Marcos, J.; Marcos Santos, M. M. S.; Marín Pina, D.; Marinoni, S.; Marocco, F.; Marshall, D. J.; Martin Polo, L.; Martín-Fleitas, J. M.; Marton, G.; Mary, N.; Masip, A.; Massari, D.; Mastrobuono-Battisti, A.; Mazeh, T.; Messina, S.; Michalik, D.; Millar, N. R.; Mints, A.; Molina, D.; Molinaro, R.; Molnár, L.; Monari, G.; Monguió, M.; Montegriffo, P.; Montero, A.; Mor, R.; Mora, A.; Morbidelli, R.; Morel, T.; Morris, D.; Muraveva, T.; Murphy, C. P.; Musella, I.; Nagy, Z.; Noval, L.; Ocaña, F.; Ogden, A.; Ordenovic, C.; Osinde, J. O.; Pagani, C.; Pagano, I.; Palaversa, L.; Palicio, P. A.; Pallas-Quintela, Lara; Panahi, A.; Payne-Wardenaar, S.; Peñalosa Esteller, X.; Penttilä, A.; Pichon, B.; Piersimoni, A. M.; Pineau, F.-X.; Plachy, E.; Plum, G.; Poggio, E.; Prš, A.; Pulone, L.; Racero, E.; Ragaini, S.; Rainer, M.; Rambaux, N.; Ramos, P.; Re Fiorentin, P.; Regibo, S.; Richards, P. J.; Rios Diaz, C.; Ripepi, V.; Riva, A.; Rix, H.-W.; Rixon, G.; Robichon, N.; Robin, A. C.; Robin, C.; Roelens, M.; Rogues, H. R. O.; Rohrbasser, L.; Romero-Gómez, M.; Royer, F.; Ruz Mieres, D.; Rybicki, K. A.; Sadowski, G.; Sáez Núñez, A.; Sagristà Sellés, A.; Sahlmann, J.; Salguero, E.; Samaras, N.; Sánchez Giménez, V.; Sanna, N.; Santoveña, Raúl; Sarasso, M.; Schultheis, M.; Sciacca, E.; Segol, M.; Segovia, J. C.; Ségransan, D.; Semeux, D.; Shahaf, S.; Siddiqui, H. I.; Siebert, A.; Siltala, L.; Slezak, E.; Slezak, I.; Smart, R. L.; Snaith, O. N.; Solano, E.; Solitro, F.; Souami, D.; Souchay, J.; Spagna, A.; Spina, L.; Spoto, F.; Steele, I. A.; Stephenson, C. A.; Süveges, M.; Surdej, J.; Szabados, L.; Szegedi-Elek, E.; Taris, F.; Taylor, M. B.; Teixeira, R.; Tolomei, L.; Tonello, N.; Torralba Elipe, Guillermo; Silvelo, Arturo; Trabucchi, M.; Tsounis, A. T.; Turon, C.; Ulla, A.; Unger, N.; Vaillant, M. V.; van Dillen, E.; van Reeven, W.; Vanel, O.; Vecchiato, A.; Viala, Y.; Vicente, D.; Voutsinas, S.; Weiler, M.; Wevers, T.; Wyrzykowski, L.; Yoldas, A.; Yvard, P.; Zhao, H.; Zorec, J.; Zucker, S.; Zwitter, T. (EDP Sciences, 2022-11-23)
      [Abstract]: Context. Gaia-CRF3 is the celestial reference frame for positions and proper motions in the third release of data from the Gaia mission, Gaia DR3 (and for the early third release, Gaia EDR3, which contains ...

    • Gaia Early Data Release 3: The Gaia Catalogue of Nearby Stars 

      Manteiga, Minia; Álvarez, M. A.; Dafonte, Carlos; Garabato, D.; Gómez García, Ángel; González Santamaría, I.; Santoveña, Raúl (EDP Sciences, 2021)
      [Abstract] Aims. We produce a clean and well-characterised catalogue of objects within 100 pc of the Sun from the Gaia Early Data Release 3. We characterise the catalogue through comparisons to the full data release, ...