Listar Ciencias Exactas y Naturales por tema "ISM : Abundances"

Mostrando ítems 1-4 de 4

    • Chemical abundances in Seyfert galaxies : X. sulphur abundance estimates 

      Dors Júnior, Oli Luiz; Valerdi, Mabel; Riffel, Rogemar André; Riffel, Rogério; Cardaci, Mónica V.; Hägelle, Guillermo Federico; Armah, Mark; Revalski, Mitchell; Flury, Sophia; Freitas-Lemes, Priscila; Amôres, Eduardo Brescansin de; Krabbe, Angela Cristina; Binette, Luc; Feltre, Anna; Storchi-Bergmann, Thaisa (2023) [Artículo de periódico]
      For the first time, the sulphur abundance relative to hydrogen (S/H) in the narrow-line regions of a sample of Seyfert 2 nuclei (Sy 2s) has been derived via direct estimation of the electron temperature. Narrow emission-line ...

    • Gas metallicity distributions in SDSS-IV MaNGA galaxies : what drives gradients and local trends? 

      Boardman, Nicholas Fraser; Wild, Vivienne; Heckman, Timothy M.; Sánchez, Sebastián F.; Riffel, Rogério; Riffel, Rogemar André; Zasowski, G. (2023) [Artículo de periódico]
      The gas metallicity distributions across individual galaxies and across galaxy samples can teach us much about how galaxies evolve. Massive galaxies typically possess negative metallicity gradients, and mass and metallicity ...

    • How well do local relations predict gas-phase metallicity gradients? : results from SDSS-IV MaNGA 

      Boardman, Nicholas Fraser; Zasowski, G.; Newman, Jeffrey A.; Sánchez, Sebastián F.; Andrews, Brett H.; Barrera-Ballesteros, Jorge; Lian, Jianhui; Riffel, Rogério; Riffel, Rogemar André; Schaefer, Adam L.; Bundy, Kevin (2022) [Artículo de periódico]
      Gas-phase metallicity gradients in galaxies provide important clues to those galaxies’ formation histories. Using SDSS-IV MaNGA data, we previously demonstrated that gas metallicity gradients vary systematically and ...

    • The metal-poor dwarf irregular galaxy candidate next to Mrk 1172 

      Lassen, Augusto Eduardo; Riffel, Rogério; Chies-Santos, Ana Leonor; Johnston, Evelyn J.; Haußler, Boris; Azevedo, Gabriel Maciel; Dutra, Daniel Ruschel; Riffel, Rogemar André (2021) [Artículo de periódico]
      In this work, we characterize the properties of the object SDSS J020536.84−081424.7, an extended nebular region with projected extension of 14 × 14 kpc2 in the line of sight of the ETG Mrk 1172, using unprecedented ...