Astrophysical: Circumstellar matter

  • Publication
    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...
  • Publication
    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...
  • Publication
    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...
  • Publication
    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...
  • Publication
    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...
  • Publication
    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...
  • Publication
    Unveiling the Structure of the Planetary Nebula M2-48
    The PN M2-48 is formed by three main structures, namely, a bipolar central region (CR), a set of knots tracing a semicircular shell surrounding CR, and two...
  • Publication
    Variability of the transitional T Tauri star T Chamaeleontis
    Context: It is known that for solar-mass stars planet formation begins in a circumstellar disc. The study of transitional objects exhibiting clear signs of...
  • Publication
    Variation of Fluxes of RR Tel Emission Lines Measured in 2000 with Respect to 1996
    The aim of this work is to make available unpublished non-Fe+ emission line fluxes from optical spectra of the symbiotic nova RR Tel, which were taken in 2000...