Navegação Ciências Exatas e da Terra por Autor "Koposov, Sergey E."

Resultados 1-3 de 3

    • The discovery of a five-image lensed quasar at z = 3.34 using PanSTARRS1 and Gaia 

      Ostrovski, F.; Lemon, Cameron A.; Auger, Matthew W.; McMahon, Richard G.; Fassnacht, Christopher D.; Chen, Geoff C.-F.; Connolly, Andrew J.; Koposov, Sergey E.; Pons, Estelle; Reed, Sophie L.; Rusu, Cristian Eduard (2018) [Artigo de periódico]
      We report the discovery, spectroscopic confirmation and mass modelling of the gravitationally lensed quasar system PS J0630−1201. The lens was discovered by matching a photometric quasar catalogue compiled from Pan-STARRS1 ...

    • The Gaia-ESO survey : radial metallicity gradients and age-metallicity relation of stars in the Milky Way disk 

      Bergemann, Maria; Ruchti, Gregory; Serenelli, Aldo M.; Feltzing, Sofia; Alves-Brito, Alan; Asplund, Martin; Bensby, Thomas L.; Gruyters, Pieter; Heiter, Ulrike; Hourihane, Anna; Korn, Andreas J.; Lind, Karin; Marino, Anna F.; Jofre, Paula; Nordlander, Thomas; Ryde, Nils A. E.; Worley, Clare C.; Gilmore, Gerard Fitzgerald; Randich, Sofia; Ferguson, Annette M. N.; Jeffries, Rob D.; Micela, Giuseppina; Negueruela, Ignacio; Prusti, Timo; Rix, H.-W.; Vallenari, Antonella; Alfaro, Emilio Javier; Allende Prieto, Carlos; Bragaglia, Angela; Koposov, Sergey E.; Lanzafame, Alessandro C.; Pancino, Elena; Recio-Blanco, Alejandra; Smiljanic, Rodolfo Henrique Silva; Walton, Nicholas A.; Costado, María Teresa; Franciosini, Elena; Hill, Vanessa; Lardo, Carmela; De Laverny, Patrick‏; Magrini, Laura; Maiorca, Enrico; Masseron, Thomas; Morbidelli, Lorenzo; Sacco, Germano; Kordopatis, Georges; Tautvaišiene, Gražina (2014) [Artigo de periódico]
      We study the relationship between age, metallicity, and α-enhancement of FGK stars in the Galactic disk. The results are based upon the analysis of high-resolution UVES spectra from the Gaia-ESO large stellar survey. We ...

    • VDES J2325−5229 a z = 2.7 gravitationally lensed quasar discovered using morphology-independent supervised machine learning 

      Ostrovski, F.; McMahon, Richard G.; Connolly, Andrew J.; Lemon, Cameron A.; Auger, Matthew W.; Banerji, M.; Hung, Johnathan M.; Koposov, Sergey E.; Lidman, Chris; Reed, Sophie L.; Allam, Sahar S.; Benoit-Lévy, Aurélien; Bertin, Emmanuel; Brooks, D.; Buckley-Geer, Elizabeth; Carnero Rosell, Aurelio; Carrasco Kind, Matías; Carretero Palacios, Jorge; Cunha, Carlos Eduardo; Costa, Luiz N. da; Desai, S.; Diehl, H. Thomas; Dietrich, Jörg P.; Evrard, August E.; Finley, David A.; Flaugher, Brenna; Fosalba Vela, Pablo; Frieman, Joshua A.; Gerdes, David W.; Goldstein, Daniel Abraham; Gruen, Daniel; Gruendl, Robert A.; Gutierrez, Gaston R.; Honscheid, K.; James, David J.; Kuehn, Kyler; Kuropatkin, Nikolay P.; Lima, Marcos Vinicius Borges Teixeira; Lin, H.; Maia, Marcio Antonio Geimba; Marshall, Jennifer L.; Martini, Paul; Melchior, Peter M.; Miquel, Ramon; Ogando, Ricardo L.C.; Plazas Malagón, Andrés Alejandro; Reil, Kevin; Romer, Kathy; Sanchez-Alvaro, Eusebio; Santiago, Basilio Xavier; Scarpine, Victor Emanuel; Sevilla Noarbe, Ignacio; Soares-Santos, Marcelle; Sobreira, Flávia; Suchyta, Eric; Tarle, Gregory; Thomas, D.; Tucker, Douglas L.; Walker, Alistair (2017) [Artigo de periódico]
      We present the discovery and preliminary characterization of a gravitationally lensed quasar with a source redshift zs = 2.74 and image separation of 2.9 arcsec lensed by a foreground zl = 0.40 elliptical galaxy. Since ...