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Astron. Astrophys. 355, 256-260 (2000)

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Research Note

The spectropolarimetric observations of three outburst objects, CI Camelopardalis, Nova Sagittarii 1998, and U Scorpii

Y. Ikeda 1, K.S. Kawabata 2 and H. Akitaya 1

1 Astronomical Institute, Graduate School of Science, Tohoku University, Aramaki, Aoba-ku, Sendai 980-8578, Japan (ikeda, akitaya@astr.tohoku.ac.jp)
2 Optical and Infrared Astronomy Division, National Astronomical Observatory, Osawa 2-21-1, Mitaka, Tokyo 181-8588, Japan (koji.kawabata@nao.ac.jp)

Received 17 September 1999 / Accepted 13 January 2000

Abstract

We carried out spectro-polarimetry of three outburst objects, CI Cam, Nova Sgr 1998, and U Sco. Although we were not able to detect the evidence of the intrinsic polarization for the former two stars, we succeeded in confirming the existence of intrinsic polarization for the last one, U Sco. U Sco showed de-polarization effect on emission lines. It also showed rapid variation of the continuum polarization. Its behavior resembles that observed for a classical nova, V1974 Cyg, although the time-scale of variation differs between two novae.

Key words: stars: novae, cataclysmic variables – stars: individual: U Sco – stars: individual: CI Cam – stars: individual: Nova Sgr – techniques: polarimetric

Send offprint requests to: Y. Ikeda

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© European Southern Observatory (ESO) 2000

Online publication: March 17, 2000
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