• Title of article

    Two new bright Ae stars

  • Author/Authors

    Monin، D. N. نويسنده , , Wade، G. A. نويسنده , , Fabrika، S. N. نويسنده ,

  • Issue Information
    روزنامه با شماره پیاپی سال 2003
  • Pages
    -196
  • From page
    197
  • To page
    0
  • Abstract
    Two newly identified Ae stars, (nu)Cyg and (kappa)UMa, were discovered in the course of the Magnetic Survey of Bright main sequence stars (Monin et al. 2002). We present their H (alpha)profiles along with measurements of their equivalent width and parameters of emission features. Emission in the H (alpha) line of (nu)Cyg is variable on a time scale of 3 years. (kappa)UMa exhibits weak emission which is rather stable. The emission is thought to arise from a circumstellar disk, and we have estimated the size of that disk.Both new emission stars are IRAS sources. Their IR color excesses are consistent with those of classical Ae stars. Thus, (nu) Cyg and (kappa) UMa appear not to belong to the class of Herbig Ae/Be stars. We argue that the frequency of Ae stars may be underestimated due to the difficulty of detection of weak emission in some A stars.
  • Keywords
    stars: individual: (nu)Cyg , stars: individual: (kappa)UMa , stars: emission line, Be
  • Journal title
    Astronomy and Astrophysics
  • Serial Year
    2003
  • Journal title
    Astronomy and Astrophysics
  • Record number

    77002