The cool Galactic R Coronae Borealis variable DY Persei

Details The cool Galactic R Coronae Borealis variable DY Persei The cool Galactic R Coronae Borealis variable DY Persei

Aug 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005a%26a...438l..13z&link_type=abstract

Astronomy and Astrophysics, Volume 438, Issue 2, August I 2005, pp.L13-L16

Astronomy and Astrophysics

Astrophysics

7

Stars: Carbon, Stars: Winds, Outflows, Stars: Fundamental Parameters, Stars: Circumstellar Matter, Stars: Individual: Dy Per

Scientific paper

Results of first CCD photometry during the recent deep light decline, and high-resolution spectroscopy, are presented for DY Persei. The spectra show variable blueshifted features in the sodium D lines. The C i lines are strong whereas neutron-capture 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 RCB 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 0.4 arcsec to the west and 2.5 arcsec 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.

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