Journal: Astronomy and Astrophysics

  • Publication
    The nature of arms in spiral galaxies. II. The sample
    We present here the results of an imaging study of eight grand-design and two intermediate-arm galaxies, based on CCD observations in U, B, V, R and I. We give...
  • Publication
    The nature of arms in spiral galaxies. III. Azimuthal profiles
    In this paper we analyse the structure of a small sample of galaxies using a set of CCD images in standard photometric bands presented in a previous paper (del...
  • Publication
    The nature of comet-asteroid transition object (3200) Phaethon
    Context: The study of asteroids that present sporadic cometary activity is of fundamental importance to address several astronomical problems including the end...
  • Publication
    The nature of HH 223 from long-slit spectroscopy
    Context: HH 223 is a knotty, undulating nebular emission of ˜30 arcsec length found in the L723 star-forming region. It lies projected onto the largest...
  • Publication
    The nature of LINER galaxies:. Ubiquitous hot old stars and rare accreting black holes
    Context. Galaxies, which often contain ionised gas, sometimes also exhibit a so-called low-ionisation nuclear emission line region (LINER). For 30 years, this...
  • Publication
    The nature of nuclear Hα emission in LINERs
    To get insight into the nature of the ionized gas in the nuclear region of LINERs, we performed a study of HST Hα imaging of 32 LINERs. The main conclusion from...
  • Publication
    The nature of the X-ray transient SAX J1711.6-3808
    SAX J1711.6-3808 is an X-ray transient in the Galactic bulge that was active from January through May of 2001 and whose maximum 1-200 keV luminosity was...
  • Publication
    The nature of V39: an LBV candidate or LBV impostor in the very low metallicity galaxy IC 1613?
    Context. Very few examples of luminous blue variable (LBV) stars or LBV candidates (LBVc) are known, particularly at metallicities below that of the Small...
  • Publication
    The nature of VX Sagitarii. Is it a TŻO, a RSG, or a high-mass AGB star?
    Aims: We present a spectroscopic analysis of the extremely luminous red star VX Sgr based on high-resolution observations combined with AAVSO light curve data...