Astrofísicas: Materia circunestelar

  • Charla
    Distribution of the Wind from the Cool Giants in Symbiotic Binary Stars
    In symbiotic stars, two different physical regimes of circumstellar material exist side by side. Around the donor red giant star, there is a cool and dense...
  • Publicación
    Dust around R Coronae Borealis Stars. I. Spitzer/Infrared Spectrograph Observations
    Spitzer/infrared spectrograph (IRS) spectra from 5 to 37 μm for a complete sample of 31 R Coronae Borealis stars (RCBs) are presented. These spectra are...
  • Publicación
    Dust Around R Coronae Borealis Stars. II. Infrared Emission Features in an H-poor Environment
    Residual Spitzer/Infrared Spectrograph spectra for a sample of 31 R Coronae Borealis (RCB) stars are presented and discussed in terms of narrow emission...
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    Dust properties in the circumstellar shells of evolved stars: Observational constraints from ISO and Spitzer infrared spectroscopy
    We present the results of a systematic analysis of the solid state features identified in the circumstellar environments of a large sample of evolved stars with...
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    Dynamics of the circumstellar gas in the Herbig Ae stars BF Orionis, SV Cephei, WW Vulpeculae and XY Persei
    We present high resolution (λ/Δ λ = 49 000) échelle spectra of the intermediate mass, pre-main sequence stars BF Ori, SV Cep, WW Wul and XY Per. The spectra...
  • Publicación
    Episodic dust formation by HD 192641 (WR 137) - II
    We present new infrared photometry of the WC7-type Wolf-Rayet star HD 192641 (WR137) from 1985 to 1999. These data track the cooling of the dust cloud formed in...
  • Publicación
    EX Lupi in quiescence
    Aims: EX Lupi is the prototype of EXors, a subclass of low-mass pre-main sequence stars whose episodic eruptions are attributed to temporarily increased...
  • Publicación
    Exploring the circumstellar environment of the young eruptive star V2492 Cygni
    Context. V2492 Cyg is a young eruptive star that went into outburst in 2010. The near-infrared color changes observed since the outburst peak suggest that the...
  • Publicación
    EXPORT: Optical photometry and polarimetry of Vega-type and pre-main sequence stars
    This paper presents optical UBVRI broadband photo-polarimetry of the EXPORT sample obtained at the 2.5 m Nordic Optical Telescope. The database consists of...