The cool galactic R Coronae Borealis variable DY Persei

L. Začs, W. P. Chen, O. Alksnis, D. Kinoshita, F. A. Musaev, T. Brice, K. Sanchawala, H. T. Lee, C. W. Chen

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Results of first CCD photometry during the recent deep light decline, and high-resolution spectroscopy, are presented Dr DY Persei. The spectra show variable blueshifted features in the sodium D lines. The CI lines are strong whereas neutroncapture elements are not enhanced. The isotopic 13CN(2,0) lines relative to 12CN are of similar strength with those for the carbon star U Hya. All these confirm the RGB nature of DY Per and the existence of ejected clouds. At least two clouds are revealed at -197.3 and -143.0 km s-1. A star was detected about 074 to the west and 2″.5 to the north from DY Per. This anonymous companion, with observed colour indices (B - V) = 0.68 and (V - R) ≃ 1.1, may be a foreground star.

Original languageEnglish
Pages (from-to)L13-L16
JournalAstronomy and Astrophysics
Issue number2
StatePublished - Aug 2005


  • Stars: carbon
  • Stars: circumstellar matter
  • Stars: fundamental parameters
  • Stars: individual: DY Per
  • Stars: winds, outflows


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