Listar por tema "Tecnicas astronomicas"

Mostrando ítems 1-9 de 9

    • An atlas of the circumnuclear regions of 75 Seyfert galaxies in the near-ultraviolet with the Hubble Space Telescope advanced camara for surveys 

      Muñoz Marín, Victor M.; González Delgado, Rosa M.; Schmitt, Henrique Roberto; Fernandes, Roberto Cid; Pérez Jiménez, Enrique; Storchi-Bergmann, Thaisa; Heckman, Timothy M.; Leitherer, Claus (2007) [Artículo de periódico]
      We present an atlas of the central regions of 75 Seyfert galaxies imaged in the near-UV with the Advanced Camera for Surveys of the Hubble Space Telescope at an average resolution of ~10 pc. These data complement archival ...

    • An independent method for determining the age of the universe 

      Winget, Donald Earl; Liebert, James; Horn, H.M. van; Fontaine, Gilles; Nather, R. Edward; Kepler, Souza Oliveira; Lamb, Donald Q.; Hansen, Carl J.; Hasen, C.J. (1987) [Artículo de periódico]
      The oldest white dwarf stars in the solar neighborhood are still observable, and their luminosity distribution can be used to determine directly the age of the Galactic disk and, somewhat less directly, the age of the ...

    • Dating star clusters in the Small Magellanic Cloud by means of integrated spectra 

      Ahumada, Andrea Veronica; Claria Olmedo, Juan Jose; Bica, Eduardo Luiz Damiani; Dutra, Carlos Maximiliano (2002) [Artículo de periódico]
      In this study flux-calibrated integrated spectra in the range (3600–6800) Å are presented for 16 concentrated star clusters in the Small Magellanic Cloud (SMC), approximately half of which constitute unstudied objects. We ...

    • A morphological method to determine corotation radII in spiral galaxies 

      Puerari, Ivanio; Dottori, Horacio Alberto (1997) [Artículo de periódico]
      Shock-induced star formation in a stellar density wave scenario produces an azimuthal gradient of ages across the spiral arms that has opposite signs on either side of the corotation resonance (CR). We present a method ...

    • Nonradial pulsation of the unevolved hot (gamma) scuti star cd-24 7599 discovered with the whole earth telescope 

      Handler, Gerald; Breger, M.; Sullivan, Denis J.; Peet, A.J. van der; Clemens, J. Christopher; O'Donoghue, Darragh; Chen, A.-L.; Kanaan Neto, Antonio Nemer; Sterken, C.; Claver, C.F.; Krisciunas, K.; Kleinman, Scot James; Wickramasinghe, D.T.; Wills, Beverley J.; Provencal, Judith L.; Nather, R. Edward; Winget, Donald Earl; Watson, Todd K.; Barstow, Martin A.; Buckley, David A.H. (1996) [Artículo de periódico]
      We report a frequency analysis of the δ Scuti star CD-24°7599 and the discovery that it pulsates nonradially with at least 7 frequencies between 27.01 and 38.11 cycles per day (312 to 441 μHz). These results are based on ...

    • SDSS-III : massive spectroscopic surveys of the distant universe, the Milk Way, and extra-solar planetary systems 

      Eisenstein, Daniel, J.; Weinberg, D.H.; Agol, Eric; Aihara, H.; Allende Prieto, Carlos; Anderson, S.F.; Arns, James A.; Aubourg, Éric; Bailey, Stephen; Balbinot, Eduardo; Barkhouser, Robert; Beers, T.C.; Berlind, Andreas A.; Bickerton, S.J.; Bizyaev, D.; Blanton, M.R.; Bochanski, J.J.; Bolton, Adam S.; Bosman, Casey T.; Bovy, Jo; Brandt, W.N.; Breslauer, Ben; Brewington, Howard J.; Brinkmann, Jon; Brown, Peter J.; Brownstein, Joel R.; Burger, Dan; Busca, Nicolas G.; Campbell, Heather; Cargile, Phillip A.; Carithers, William C.; Carlberg, J.K.; Carr, M.A.; Chang, Liang; Chen, Yanmei; Chiappini, C.C.M.; Comparat, Johan; Connolly, Natalia; Cortes, Marina; Croft, Rupert A.C.; Cunha, Katia; Costa, Luiz N. da; Davenport, J.R.A.; Dawson, K.S.; De Lee, Nathan M.; Mello, Gustavo Frederico Porto de; De Simoni, Fernando S.; Dean, Janice; Dhital, S.; Ealet, Anne; Ebelke, Garrett L.; Edmondson, E.M.; Eiting, J.M.; Escoffier, Stephanie; Esposito, Massimiliano; Evans, M.L.; Fan, Xiaohui; Femenía Castellá, B.; Ferreira, Letícia D.; Fitzgerald, Greg; Fleming, S.W.; Font-Ribera, A.; Ford, Eric B.; Frinchaboy, P.M.; García Pérez, Ana Elia; Gaudi, B. S.; Ge, Jian; Ghezzi, Luan; Gillespie, Bruce A.; Gilmore, Gerry; Girardi, Leo Alberto; Gott, J. Richard; Gould, Andrew; Grebel, Eva K.; Gunn, James E.; Hamilton, J.C.; Harding, Paul; Harris, D.W.; Hawley, Suzanne L.; Hearty, Frederick R.; Hennawi, J.F.; González Hernández, Jonay I.; Ho, Shirley; Hogg, D.W.; Holtzman, J.A.; Honscheid, K.; Inada, Naohisa; Ivans, Inese I.; Jiang, L.; Jiang, Peng; Johnson, J.A.; Jordan, Cathy; Jordan, W.P.; Kauffmann, Guinevere; Kazin, Eyal A.; Kirkby, David; Klaene, Mark A.; Knapp, G. R.; Kneib, J.P.; Kochanek, C.S.; Koesterke, L.; Kollmeier, Juna A.; Kron, Richard G.; Lampeitl, Hubert; Lang, Dustin; Lawler, J.E.; Le Goff, Jean-Marc; Lee, B.L.; Lee, Y.S.; Leisenring, J.M.; Lin, Y.-T.; Liu, Jian; Long, Daniel C.; Loomis, Craig P.; Lucatello, Sara; Lundgren, B.; Lupton, R.H.; Ma, Bo; Ma, Zhibo; Macdonald, Nicholas; Mack, C. E.; Mahadevan, Suvrath; Maia, Marcio Antonio Geimba; Majewski, Steven Raymond; Makler, Martín; Malanushenko, E.; Malanushenko, V.; Mandelbaum, Rachel; Maraston, Claudia; Margala, D.; Maseman, P.A.; Masters, K.L.; McBride, Cameron K.; McDonald, Patrick; McGreer, Ian D.; McMahon, Richard G.; Mena Requejo, Olga; Ménard, Brice; Miralda-Escudé, J.; Morrison, H.L.; Mullally, Fergal; Muna, Demitri; Murayama, H.; Myers, A.D.; Naugle, Tracy; Fausti Neto, Angelo; Nguyen, D.C.; Nichol, Robert C.; Nidever, D.L.; O'Connell, Robert West; Ogando, Ricardo L.C.; Olmstead, Matthew D.; Oravetz, Daniel J.; Padmanabhan, N.; Paegert, Martin; Palanque-Delabrouille, Nathalie; Pan, K.; Pandey, Parul; Parejko, J.K.; Pâris, Isabelle; Pellegrini, Paulo Sérgio de Souza; Pepper, J.; Percival, Will J.; Petitjean, P.; Pfaffenberger, Robert; Pforr, J.; Phleps, Stefanie; Pichon, C,; Pieri, Matthew M.; Prada, F.; Price-Whelan, Adrian M.; Raddick, M. Jordan; Ramos, Beatriz H.F.; Reid, I. Neill; Reylé, Céline; Rich, J.; Richards, G.T.; Rieke, G.H.; Rieke, M.J.; Rix, H.-W.; Robin, A.C.; Rocha-Pinto, H.J.; Rockosi, C.M.; Roe, Natalie A.; Rollinde, Emmanuel; Ross, A.J.; Ross, Nicholas P.; Rossetto, Bruno M.; Sánchez, Ariel G.; Santiago, Basilio Xavier; Sayres, Conor; Schiavon, Ricardo P.; Schlegel, David J.; Schlesinger, K.J.; Schmidt, Sarah. J.; Schneider, D.P.; Sellgren, K.; Bradley, Alaina C. Shelden; Sheldon, Erin; Shetrone, M.; Shu, Yiping; Silverman, J.D.; Simmerer, Jennifer; Simmons, Audrey E.; Sivarani, Thirupathi; Skrutskie, M.F.; Slosar, A.; Smee, Stephen; Smith, Verne V.; Snedden, S.A.; Stassun, Keivan G.; Steele, Oliver; Steinmetz, M.; Stockett, Mark H.; Stollberg, Todd; Strauss, Michael A.; Szalay, A.S.; Tanaka, M.; Thakar, Aniruddha; Thomas, D.; Tinker, Jeremy; Tofflemire, Benjamin M.; Tojeiro, R.; Tremonti, Christy A.; Vargas Magaña, Mariana; Verde, Licia; Vogt, N.P.; Wake, D.A.; Wan, Xiaoke; Wang, Ji; Weaver, Benjamin A.; White, M.; White, Simon D. M.; Wilson, J.C.; Wisniewski, J.P.; Wood-Vasey, W.M.; Yanny, Brian; Yasuda, Naoki; Yèche, Christophe; York, Donald G.; Young, E.; Zasowski, G.; Zehavi, I.; Zhao, Bo (2011) [Artículo de periódico]
      Building on the legacy of the Sloan Digital Sky Survey (SDSS-I and II), SDSS-III is a program of four spectroscopic surveys on three scientific themes: dark energy and cosmological parameters, the history and structure of ...

    • A simple prescription for simulating and characterizing gravitational arcs 

      Furlanetto, Cristina; Santiago, Basilio Xavier; Makler, Martín; De Bom, Clécio Roque; Brandt, Carlos Henrique; Fausti Neto, Angelo; Ferreira, Pedro da Cunha; Costa, Luiz N. da; Maia, Marcio Antonio Geimba (2013) [Artículo de periódico]
      Simple models of gravitational arcs are crucial for simulating large samples of these objects with full control of the input parameters. These models also provide approximate and automated estimates of the shape and structure ...

    • Target selection for the Apache Point Observatory Galactic Evolution Experiment (APOGEE) 

      Zasowski, G.; Johnson, J.A.; Frinchaboy, P.M.; Majewski, Steven Raymond; Nidever, D.L.; Rocha-Pinto, H.J.; Girardi, Leo Alberto; Andrews, Brett H.; Chojnowski, Stephen Drew; Cudworth, Kyle McC.; Jackson, Kelly M.; Munn, Jeffrey, A.; Skrutskie, M.F.; Beaton, Rachael Lynn; Blake, Cullen H.; Covey, Kevin; Deshpande, Rohit; Epstein, Courtney; Fabbian, Damian; Fleming, S.W.; García-Hernández, D. A.; Herrero Davó, Artemio; Mahadevan, Suvrath; Mészáros, S.; Schultheis, Mathias; Sellgren, K.; Terrien, Ryan C.; van Saders, Jennifer L.; Allende Prieto, Carlos; Bizyaev, D.; Burton, Adam; Cunha, Katia; Costa, Luiz N. da; Hasselquist, Sten; Hearty, Frederick R.; Holtzman, J.A.; García Pérez, Ana Elia; Maia, Marcio Antonio Geimba; O'Connell, Robert West; O’Donnell, C.; Pinsonneault, Marc H.; Santiago, Basilio Xavier; Schiavon, Ricardo P.; Shetrone, M.; Smith, Verne V.; Wilson, J.C. (2013) [Artículo de periódico]
      The Apache Point Observatory Galactic Evolution Experiment (APOGEE) is a high-resolution infrared spectroscopic survey spanning all Galactic environments (i.e., bulge, disk, and halo), with the principal goal of constraining ...

    • The relationship between the Sérsic law profiles measured along the major and minor axes of elliptical galaxies 

      Ferrari, Fabricio; Dottori, Horacio Alberto; Caon, Nicola; Nóbrega, Antonio José Farias; Pavani, Daniela Borges (2004) [Artículo de periódico]
      In this paper we discuss the reason why the parameters of the Sérsic model best-fitting the major axis light profile of elliptical galaxies can differ significantly from those derived for the minor axis profile.We show ...