Astrofísicas: Nebulosas

  • Charla
    New Advances in Nebular Spectroscopy of Heavy Elements
    The origins of neutron(n)-capture elements (atomic number Z > 30) have historically been discerned from the interpretation of stellar spectra. However, in the...
  • Publicación
    New insights into a familiar friend - CO J = 2-1 mapping of the bipolar outflow source NGC 1333 (HH 7-11)
    The bipolar outflow source NGC 1333 (HH 7-11) was observed in the J = 2-1 transition of (C-12)O, and evidence was found for a strong westerly termination of the...
  • Publicación
    On the chemodynamics of Wolf-Rayet ring nebulae - NGC 6888
    Results of a chemodynamical study of the W-R ring nebula NGC 6888 around the WN6 star WR 136 are presented; the observations combine high spatial and spectral...
  • Publicación
    On the determination of temperatures of ionizing stars in H II regions
    Following earlier work by Shields and Searle and by Mathis, the authors define a radiation softness parameter η = (O+/O++)(S++/S+), which they recommend as a...
  • Noticia
    Posible evidencia de formación planetaria en la Nebulosa de Orión
    Una investigación internacional, dirigida por científicos del Instituto de Astrofísica de Canarias (IAC), ha mostrado la existencia de compuestos sólidos de...
  • Publicación
    Radio and infrared structures of type I post-main sequence nebulae
    High-resolution VLA radio mapping at 1.46, 4.84, and 15.0 GHz is presented together with NIR J,H,K,L, and M mapping and photometry of a broad range of type I...
  • Publicación
    Radio mapping of type I post-main-sequence nebulae
    Type I post-main-sequence nebulae appear to be characterised by a range of unusual, and in certain cases extreme physical characteristics, including high...
  • Publicación
    Spatially resolved spectroscopy of WR ring nebulae. I - NGC 2359 and RCW 78
    We report detailed spatially resolved spectroscopy of the WR nebulae NGC 2359 and RCW 78 surrounding the WN 5 HD 56925 and WN 8 HD 117688 stars. The aim of this...
  • Publicación
    Spatially resolved spectroscopy of WR ring nebulae. II - M1-67
    Detailed, high spatial resolution spectroscopy of the WR ring nebula M1-67 surrounding the WN 8 star WR 124 is presented. Abundances for 4 positions in M1-67...