Astrophysical: Binary stars

  • Publication
    Full Abundance Study of Two Newly Discovered Barium Giants
    Barium (Ba) stars are chemically peculiar stars that show enhanced surface abundances of heavy elements produced by the slow-neutron-capture process, the so...
  • Publication
    Geometry of the Draco C1 Symbiotic Binary
    Draco C1 is a known symbiotic binary star system composed of a carbon red giant and a hot, compact companion—likely a white dwarf—belonging to the Draco dwarf...
  • Publication
    Infrared and visible photometry of the RS CVn-star II Peg
    Infrared photometry in J,H,K,L,M bands carried out in different years from 1983 to 1986, and U,B,V,R,I quasi-simultaneous to 1984 are presented. Although the...
  • Publication
    Infrared observations of binary stars. I
    JHKLM photometry is presented for the close binary systems W UMa, U Sge and Beta-Lyr, and two systems, Eta-Gem and RR UMi, containing late-type variable...
  • Publication
    Infrared photometry of open clusters - The main sequence of NGC 752
    New infrared photometry of a sample of 39 stars in the open cluster NGC 752 is presented. These observations confirm the bimodality of the main sequence...
  • Publication
    Infrared photometry of the RS CVn short-period systems - XY UMa and WY CNC
    Infrared J and K light curves of two RS CVn short-period systems, XY UMa and WY Cnc, are presented. Both systems show similar variability in the infrared to...
  • Publication
    Infrared photometry of upper main sequence stars in M39
    Infrared photometry of 19 Main sequence stars in the open cluster M39 is presented. Infrared-infrared and optical-infrared color-color and color-magnitude...
  • Publication
    Infrared Spectroscopy Of V404 CYGNI. Limits On The Accretion Disc Contamination
    We have obtained for the first time 2.10 - 2.45 micron infrared spectra of soft X-ray transient V404 Cygni. We determine a 95 percent confidence upper limit to...
  • Publication
    Infrared variability of symbiotic stars
    Binary models of symbiotic stars are discussed, analyzing the results of recent IR observations. It is indicated that a binary must have component masses of...