Astrofísicas: Materia circunestelar

  • Publicación
    The Onset of Photoionization in Post-AGB Stars
    During the post-AGB phase the dust shell detaches from the central star and dust temperatures varies between 100 and 200 K. In order to study the onset of photo...
  • Publicación
    The outburst and nature of two young eruptive stars in the North America/Pelican Nebula Complex
    Context. The sudden optical brightening of two young stellar objects, HBC 722 and VSX J205126.1+440523, located in the North America/Pelican Nebula Complex, was...
  • Publicación
    The outburst of the eruptive young star OO Serpentis between 1995 and 2006
    Aims:OO Serpentis is a deeply embedded pre-main sequence star in the Serpens NW star-forming region. The star went into outburst in 1995 and gradually faded...
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    The post-common envelope central stars of the planetary nebulae Henize 2-155 and Henize 2-161
    We present a study of Hen 2-155 and Hen 2-161, two planetary nebulae which bear striking morphological similarities to other planetary nebulae known to host...
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    The post-common-envelope, binary central star of the planetary nebula Hen 2-11
    We present a detailed photometric study of the central star system of the planetary nebula Hen 2-11, selected for study because of its low-ionisation filaments...
  • Publicación
    The Role of Evolutionary Age and Metallicity in the Formation of Classical Be Circumstellar Disks. II. Assessing the Evolutionary Nature of Candidate Disk Systems
    We present the first detailed imaging polarization observations of six SMC and six LMC clusters, known to have large populations of B-type stars that exhibit...
  • Publicación
    The SN Ia runaway LP 398-9: detection of circumstellar material and surface rotation
    A promising progenitor scenario for Type Ia supernovae (SNeIa) is the thermonuclear detonation of a white dwarf in a close binary system with another white...
  • Publicación
    The spectral type of CHS 7797 - an intriguing very low mass periodic variable in the Orion Nebula Cluster
    Aims: We present the spectroscopic characterization of the unusual high-amplitude very low mass pre-main-sequence periodic variable CHS 7797. Methods: This...
  • Publicación
    The Weakening Outburst of the Young Eruptive Star V582 Aur
    V582 Aur is a pre-main-sequence FU Orionis type eruptive star, which entered a brightness minimum in 2016 March due to changes in the line-of-sight extinction...