Navegação Ciências Exatas e da Terra por Assunto "Circumstellar matter"

Resultados 1-4 de 4

    • HST/WFPC2 and VLT/ISAAC observations of proplyds in the giant H II region NGC 3603 

      Brandner, Wolfgang; Grebel, Eva K.; Chu, You-Hua; Dottori, Horacio Alberto; Brandl, Bernhard; Richling, Sabine; Yorke, Harold W.; Points, Sean D.; Zinnecker, Hans (2000) [Artigo de periódico]
      We report the discovery of three proplyd-like structures in the giant H II region NGC 3603. The emission nebulae are clearly resolved in narrowband and broadband HST/WFPC2 observations in the optical and broadband VLT/ISAAC ...

    • Probing the near-infrared stellar population of Seyfert galaxies 

      Riffel, Rogério; Pastoriza, Miriani Griselda; Rodriguez-Ardila, Alberto; Bonatto, Charles Jose (2009) [Artigo de periódico]
      We employ Infrared Telescope Facility SpeX near-infrared (NIR; 0.8–2.4 μm) spectra to investigate the stellar population (SP), active galactic nuclei (AGN) featureless continuum (FC) and hot dust properties in nine Sy 1 ...

    • The frequency of gaseous debris discs around white dwarfs 

      Manser, Christopher; Gänsicke, Boris; Fusillo, Nicola Pietro Gentile; Ashley, Richard P.; Breedt, Elmé; Hollands, Mark; Izquierdo, Paula; Pelisoli, Ingrid Domingos (2020) [Artigo de periódico]
      A total of 1–3 per cent of white dwarfs are orbited by planetary dusty debris detectable as infrared emission in excess above the white dwarf flux. In a rare subset of these systems, a gaseous disc component is also detected ...

    • The stellar populations of starburst galaxies through near-infrared spectroscopy 

      Riffel, Rogério; Pastoriza, Miriani Griselda; Rodriguez-Ardila, Alberto; Maraston, Claudia (2008) [Artigo de periódico]
      We study the central (inner few hundred parsecs) stellar populations of four starburst galaxies (NGC 34, 1614, 3310 and 7714) in the near-infrared (NIR), from 0.8 to 2.4 μm, by fitting combinations of stellar population ...