Observations of co-existing double disks around Pleione with NAYUTA telescope

Details Observations of co-existing double disks around Pleione with NAYUTA telescope Observations of co-existing double disks around Pleione with NAYUTA telescope

Nov 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007asthe.100..573t&link_type=abstract

The Astronomical Herald (ISSN 0374-2466), Vol. 100, No. 11, p. 573 - 580 (2007)

Astronomy and Astrophysics

Astronomy

1

Scientific paper

Spectroscopic and B, V bands photometric observations of Pleione have been carried out at Nishi-Harima Astronomical Observatory and at Osaka Kyoiku University during the period between November 2005 and April 2007. Both B and V magnitudes of Pleione had declined by 0.35 mag during the period. Spectroscopic observations carried out using the MALLS spectrograph of the 2-m NAYUTA telescope at Nishi-Harima Astronomical Observatory showed remarkable changes in profiles and strengths of the Balmer lines as well as in metallic lines. Analyses of spectral data revealed a formation and growth of a new disk around the star's equator in the latter half of 2005 and, at the same time, a rapid declining process of the long-existing old disk which was formed in 1972. The authors discovered the co-existence of two axially tilted disks around a Be star for the first time in Pleione.

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