Navegação Ciências Exatas e da Terra por Assunto "Galaxies : stellar content"

Resultados 1-15 de 15

    • Circumnuclear star formation in active galaxies 

      Storchi-Bergmann, Thaisa; Rodriguez-Ardila, Alberto; Schmitt, Henrique Roberto; Wilson, Andrew S.; Baldwin, Jack A. (1996) [Artigo de periódico]
      We study the gas kinematics and chemical abundances in the inner regions of six galaxies with active galactic nuclei. The galaxies were selected for having star-forming regions in rings or spirals within a few kiloparsecs ...

    • Circumnuclear stellar population, morphology, and environment of Seyfert 2 galaxies : an evolutionary scenario 

      Storchi-Bergmann, Thaisa; González Delgado, Rosa M.; Schmitt, Henrique Roberto; Fernandes Junior, Roberto Cid; Heckman, Timothy M. (2001) [Artigo de periódico]
      We investigate the relation between the characteristics of the circumnuclear stellar population and both the galaxy morphology and the presence of close companions for a sample of 35 Seyfert 2 nuclei. Fifteen galaxies ...

    • From the bulge to the outer disc : StarHorse stellar parameters, distances, and extinctions for stars in APOGEE DR16 and other spectroscopic surveys 

      Queiroz, Anna Bárbara de Andrade; Santiago, Basilio Xavier; Zamora, Olga (2020) [Artigo de periódico]
      We combine high-resolution spectroscopic data from APOGEE-2 survey Data Release 16 (DR16) with broad-band photometric data from several sources as well as parallaxes from Gaia Data Release 2 (DR2). Using the Bayesian ...

    • Gemini NIFS survey of feeding and feedback processes in nearby active galaxies : VI. Stellar populations 

      Riffel, Rogério; Hahn, Luis Gabriel Dahmer; Riffel, Rogemar André; Storchi-Bergmann, Thaisa; Dametto, Natacha Zanon; Davies, Richard I.; Burtscher, Leonard; Bianchin, Marina; Dutra, Daniel Ruschel; Ricci, Claudio; Rosario, David (2022) [Artigo de periódico]
      We use Gemini Near-Infrared Integral Field Spectrograph (NIFS) adaptive optics assisted data cubes to map the stellar population of the inner few hundred parsec of a sample of 18 nearby Seyfert galaxies. The near-infrared ...

    • LLAMA : stellar populations in the nuclei of ultra-hard X-ray-selected AGN and matched inactive galaxies 

      Burtscher, Leonard; Davies, Richard I.; Shimizu, Taro; Riffel, Rogério; Rosario, David; Hicks, Erin K. S.; Lin, Ming-Yi; Riffel, Rogemar André; Schartmann, Marc; Müller, Allan Schnorr; Storchi-Bergmann, Thaisa; Xivry, Gilles Orban de; Veilleux, Sylvain (2021) [Artigo de periódico]
      The relation between nuclear (.50 pc) star formation and nuclear galactic activity is still elusive; theoretical models predict a link between the two, but it is unclear whether active galactic nuclei (AGNs) should appear ...

    • Mapping the stellar population and gas excitation of MaNGA galaxies with MEGACUBES : results for AGN versus control sample 

      Riffel, Rogério; Mallmann, Nícolas Dullius; Rembold, Sandro Barboza; Ilha, Gabriele da Silva; Riffel, Rogemar André; Storchi-Bergmann, Thaisa; Dutra, Daniel Ruschel; Vazdekis, Alexandre; Martín-Navarro, Ignacio; Schimoia, Jáderson da Silva; Almeida, Cristina Ramos; Costa, Luiz N. da; Verde, Glauber Costa Vila; Gatto, Lara Maria (2023) [Artigo de periódico]
      We present spaxel-by-spaxel stellar population fits for the ∼10 000 MaNGA data cubes. We provide multiple extension fits files, nominated as MEGACUBES, with maps of several properties as well as emission-line profiles that ...

    • A new giant branch clump structure in the Large Magellanic Cloud 

      Piatti, Andres E.; Geisler, Doug; Bica, Eduardo Luiz Damiani; Claria Olmedo, Juan Jose; Santos Junior, Joao Francisco Coelho dos; Sarajedini, Ata; Dottori, Horacio Alberto (1999) [Artigo de periódico]
      We present Washington C and T1 CCD photometry of 21 Ðelds located in the northern part of the Large Magellanic Cloud (LMC), and spread over a region of more than 2.5 deg² approximately 6° from the bar. The surveyed areas ...

    • Optical spectroscopic properties of a sample of interacting galaxies 

      Donzelli, Carlos J.; Pastoriza, Miriani Griselda (1997) [Artigo de periódico]
      We present spectroscopic observations of 83 galaxies from a sample of 49 pairs of optically selected interacting galaxies, most of them previously unobserved. These pairs consist of a main galaxy (component A) and a companion ...

    • A revised and extended catalog of Magellanic System clusters, associations, and emission nebulae. II. The Large Magellanic Cloud 

      Bica, Eduardo Luiz Damiani; Schmitt, Henrique Roberto; Dutra, Carlos Maximiliano; Oliveira, Humberto Luz (1999) [Artigo de periódico]
      A survey of extended objects in the Large Magellanic Cloud was carried out on the ESO/SERC R and J Sky Survey Atlases, checking entries in previous catalogs and searching for new objects. The census provided 6659 objects ...

    • Spatially resolved self-consistent spectral modelling of jellyfish galaxies from MUSE with FADO : trends with mass and stripping intensity 

      Azevedo, Gabriel Maciel; Chies-Santos, Ana Leonor; Riffel, Rogério; Gomes, Jean Michel Silva de Miranda; Lassen, Augusto Eduardo; Benedetti, João Pedro Verardo; Souza, Rafael da Silva de; Xu, Quanfeng (2023) [Artigo de periódico]
      We present a spatially resolved stellar population analysis of 61 jellyfish galaxies and 47 control galaxies observed with ESO/MUSE attempting to understand the general trends of the stellar populations as a function of ...

    • Spectroscopy monitoring of active galactic nuclei from CTIO. I. NGC 3227 

      Winge, Claudia; Peterson, Bradley M.; Horne, Keith; Pogge, Richard William; Pastoriza, Miriani Griselda; Storchi-Bergmann, Thaisa (1995) [Artigo de periódico]
      The results of a five-month monitoring campaign on the Seyfert 1.5 galaxy NGC 3227 are presented. Variability was detected in the continuum and in the broad emission lines. Cross correlations of the 4200 Å continuum light ...

    • Statistics of stellar populations of star clusters and surrounding fields in the outer disk of the Large Magallanic Cloud 

      Santos Junior, Joao Francisco Coelho dos; Piatti, Andres E.; Claria Olmedo, Juan Jose; Bica, Eduardo Luiz Damiani; Geisler, Doug; Dottori, Horacio Alberto (1999) [Artigo de periódico]
      A comparative analysis of Washington color-magnitude diagrams (CMDs) for 14 star clusters and respective surrounding fields in the Large Magellanic Cloud (LMC) outer disk is presented. Each CCD frame including field and ...

    • The frequency of nuclear star formation in Seyfert 2 galaxies 

      Storchi-Bergmann, Thaisa; Raimann, Daniel Iunes; Bica, Eduardo Luiz Damiani; Fraquelli, Henrique Aita (2000) [Artigo de periódico]
      We investigate the detectability of starburst signatures in the nuclear spectrum of Seyfert 2 galaxies by constructing spectral models in the wavelength range λλ3500-4100, combining the spectrum of a bulge population (of ...

    • The nature of the optical light in Seyfert 2 galaxies with polarized continua 

      Storchi-Bergmann, Thaisa; Fernandes Junior, Roberto Cid; Schmitt, Henrique Roberto (1998) [Artigo de periódico]
      We investigate the nature of the optical continuum and stellar population in the central kiloparsec of the Seyfert 2 galaxies Mrk 348, Mrk 573, NGC 1358, and Mrk 1210 using high signal-to-noise−ratio, long-slit spectra ...

    • The puzzling origin of massive compact galaxies in MaNGA 

      Müller, Allan Schnorr; Trevisan, Marina; Riffel, Rogério; Chies-Santos, Ana Leonor; Furlanetto, Cristina; Ricci, Tiago Vecchi; Lohmann, Felipe Schmidt; Freitas, Rodrigo Flores de; Mallmann, Nícolas Dullius; Alamo-Martínez, Karla A. (2021) [Artigo de periódico]
      We characterized the kinematics, morphology, and stellar population (SP) properties of a sample of massive compact quiescent galaxies (MCGs, 10 log M /M 11 and re ∼ 1–3 kpc) in the MaNGA Survey, with the goal of constraining ...