Navegação Ciências Exatas e da Terra por Assunto "Galaxies: statistics"

Resultados 1-8 de 8

    • An atlas of calcium triplet spectra of active galaxies 

      Garcia-Rissmann, Aurea; Neme, Luis Rodolfo Vega; Asari, Natalia Vale; Fernandes Junior, Roberto Cid; Schmitt, Henrique Roberto; González Delgado, Rosa M.; Storchi-Bergmann, Thaisa (2005) [Artigo de periódico]
      We present a spectroscopic atlas of active galactic nuclei covering the region around the λλ8498, 8542, 8662 calcium triplet (CaT). The sample comprises 78 objects, divided into 43 Seyfert 2s, 26 Seyfert 1s, three starburst ...

    • J-PLUS : morphological star/galaxy classification by PDF analysis 

      López San Juan, Carlos; Chies-Santos, Ana Leonor; Sodre Junior, Laerte (2019) [Artigo de periódico]
      Aims. Our goal is to morphologically classify the sources identified in the images of the J-PLUS early data release (EDR) as compact (stars) or extended (galaxies) using a dedicated Bayesian classifier. Methods. J-PLUS ...

    • Mapping and simulating systematics due to spatially varying observing conditions in DES Science Verification data 

      Leistedt, Boris; Peiris, Hiranya V.; Elsner, Franz; Benoit-Lévy, Aurélien; Amara, Adam; Bauer, Anne Hollister; Becker, Matthew R.; Bonnett, Christopher; Bruderer, Claudio; Busha, M. T.; Carrasco Kind, Matías; Chang, Chihway; Crocce, Martin; Costa, Luiz N. da; Gaztañaga, Enrique; Huff, Eric; Lahav, Ofer; Palmese, A.; Percival, Will J.; Refregier, Alexandre; Ross, A.J.; Rozo, Eduardo; Rykoff, Eli; Sánchez Alonso, Carles; Sadeh, Iftach; Sevilla Noarbe, Ignacio; Sobreira, Flávia; Suchyta, Eric; Swanson, Molly E. C.; Wechsler, Risa H.; Abdalla, Filipe B.; Allam, Sahar S.; Banerji, M.; Bernstein, Gary M.; Bernstein, Rebecca A.; Bertin, Emmanuel; Bridle, Sarah Louise; Brooks, D.; Buckley-Geer, Elizabeth; Burke, David Lyle; Capozzi, Diego; Carnero Rosell, Aurelio; Carretero Palacios, Jorge; Cunha, Carlos Eduardo; D'Andrea, Christopher B.; DePoy, Darren L.; Desai, S.; Diehl, H. Thomas; Doel, Peter; Eifler, Tim; Evrard, August E.; Fausti Neto, Angelo; Flaugher, Brenna; Fosalba Vela, Pablo; Frieman, Joshua A.; Gerdes, David W.; Gruen, Daniel; Gruendl, Robert A.; Gutierrez, Gaston R.; Honscheid, K.; James, David J.; Jarvis, Michael; Kent, Stephen M.; Kuehn, Kyler; Kuropatkin, Nikolay P.; Li, T. S.; Lima, Marcos Vinicius Borges Teixeira; Maia, Marcio Antonio Geimba; March, Marisa Cristina; Marshall, Jennifer L.; Martini, Paul; Melchior, Peter M.; Miller, Christopher J.; Miquel, Ramon; Nichol, Robert C.; Nord, Brian Dennis; Ogando, Ricardo L.C.; Plazas Malagón, Andrés Alejandro; Reil, Kevin; Romer, Anita K.; Roodman, Aaron; Sanchez-Alvaro, Eusebio; Santiago, Basilio Xavier; Scarpine, Victor Emanuel; Schubnell, Michael; Smith, Robert Christopher; Soares-Santos, Marcelle; Tarle, Gregory; Thaler, Jon J.; Thomas, D.; Vikram, Vinu; Walker, Alistair; Wester, William Carl; Zhang, Yuanyuan; Zuntz, J. (2016) [Artigo de periódico]
      Spatially varying depth and the characteristics of observing conditions, such as seeing, airmass, or sky background, are major sources of systematic uncertainties in modern galaxy survey analyses, particularly in deep ...

    • Photometric redshift analysis in the Dark Energy Survey science verification data 

      Sánchez Alonso, Carles; Carrasco Kind, Matías; Lin, H.; Serra Ricart, Miquel; Abdalla, Filipe B.; Amara, Adam; Banerji, M.; Bonnet, Christopher Clive; Brunner, Robert J.; Capozzi, Diego; Carnero Rosell, Aurelio; Castander Serentill, Francisco Javier; Costa, Luiz N. da; Cunha, Carlos Eduardo; Fausti Neto, Angelo; Gerdes, David W.; Greisel, N.; Gschwend, Julia de Figueiredo; Hartley, William; Jouvel, Stéphanie; Lahav, Ofer; Lima, Marcos Vinicius Borges Teixeira; Maia, Marcio Antonio Geimba; Martí, P.; Ogando, Ricardo L.C.; Ostrovski, F.; Pellegrini, Paulo Sérgio de Souza; Rau, Markus Michael; Sadeh, Iftach; Seitz, Stella; Sevilla Noarbe, Ignacio; Sypniewski, Adam J.; Vicente, J. de; Abbott, Timothy M. C.; Allam, Sahar S.; Atlee, David; Bernstein, Gary M.; Bernstein, Joseph P.; Buckley-Geer, Elizabeth; Burke, David Lyle; Childress, Michael; Davis, Tamara M.; DePoy, Darren L.; Dey, Arjun; Desai, S.; Diehl, H. Thomas; Doel, Peter; Estrada, Juan; Evrard, August E.; Fernandez, Enrique; Finley, David A.; Flaugher, Brenna; Frieman, Joshua A.; Gaztañaga, Enrique; Glazebrook, Karl; Honscheid, K.; Kim, A. G.; Kuehn, Kyler; Kuropatkin, Nikolay P.; Lidman, Chris; Makler, Martín; Marshall, Jennifer L.; Nichol, Robert C.; Roodman, Aaron; Sanchez-Alvaro, Eusebio; Santiago, Basilio Xavier; Sako, Masao; Scalzo, Richard; Smith, Robert Christopher; Swanson, Molly E. C.; Tarle, Gregory; Thomas, D.; Tucker, Douglas L.; Uddin, Syed; Valdes, Francisco; Walker, Alistair; Yuan, Fang; Zuntz, J. (2014) [Artigo de periódico]
      We present results from a study of the photometric redshift performance of the Dark Energy Survey (DES), using the early data from a Science Verification period of observations in late 2012 and early 2013 that provided ...

    • The frequency of very young galaxies in the local Universe : II. The view from SDSS spectra 

      Mamon, Gary A.; Trevisan, Marina; Thuan, Trinh Xuan; Gallazzi, Anna R.; Davé, Romeel (2020) [Artigo de periódico]
      Only a handful of galaxies in the local Universe appear to be very young. We estimate the fraction of very young galaxies (VYGs), defined as those with more than half their stellar masses formed within the last Gyr. We fit ...

    • The Herschel-ATLAS data release 2. Paper II : catalogs of far-infrared and submillimeter sources in the fields at the south and north Galactic poles 

      Maddox, Steve J.; Valiante, Elisabetta; Cigan, Phillip J.; Dunne, Loretta; Eales, Stephen A.; Smith, Matthew Wilson L.; Dye, Simon; Furlanetto, Cristina; Ibar, Eduardo; De Zotti, Gianfranco; Millard, Jenifer; Bourne, Nathan; Gomez, Haley L.; Ivison, Rob J.; Scott, Douglas J.; Valtchanov, Ivan (2018) [Artigo de periódico]
      The Herschel Astrophysical Terahertz Large Area Survey (H-ATLAS) is a survey of 660 deg2 with the PACS and SPIRE cameras in five photometric bands: 100, 160, 250, 350, and 500 μm. This is the second of three papers describing ...

    • The spatial extension of extended narrow line regions in MaNGA AGN 

      Chen, Jianhang; Shi, Yong; Dempsey, Ross; Law, David R.; Chen, Yanmei; Yan, Renbin; Bing, Longji; Rembold, Sandro Barboza; Li, Songlin; Yu, Xiaoling; Riffel, Rogemar André; Brownstein, Joel R.; Riffel, Rogério (2019) [Artigo de periódico]
      In this work, we revisit the size–luminosity relation of the extended narrow line regions (ENLRs) using a large sample of nearby active galactic nuclei (AGNs) from the Mapping Nearby Galaxies at Apache Point Observatory ...

    • The stellar populations of low-luminosity active galactic nuclei – III. Spatially resolved spectral properties 

      Fernandes Junior, Roberto Cid; González Delgado, Rosa M.; Storchi-Bergmann, Thaisa; Martins, Lucimara Pires; Schmitt, Henrique Roberto (2005) [Artigo de periódico]
      In a recently completed survey of the stellar population properties of low-ionization nuclear emission-line regions (LINERs) and LINER/H II transition objects (TOs), we have identified a numerous class of galactic nuclei ...