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Polarimetric Outbursts in Young Herbig Ae/Be Stars and in Peculiar B[e] Stars

Published online by Cambridge University Press:  12 April 2016

R.V. Yudin
R.V. Yudin*
Affiliation:
Central Astronomical Observatory of the Russian Academy of Sciences at Pulkovo, 196140 Saint-Petersburg, Russia

Extract

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Quasi-simultaneous optical and IR photometric (BVRIJHK) and optical polarimetric (BVRI) observations were carried out at the 1 m telescope of Assy Observatory (Institute of Astrophysics of the Kazakhstan Academy of Sciences). The photometer-polarimeter of the Pulkovo Observatory (Bergner et al. 1988) was used for the study. All our measurements were done with apertures of 26" and 52".

HDE 259431. Our data show a strong polarimetric variability Δp = 2% – 3% and ΔΘ 30° (especially in UV and optical region). Although the general nature of polarization is connected with the dust disk around the star (Dzhakusheva et al. 1988), the polarimetric variability probably has an another origin. This is due to the fact that we have observed a strong polarimetric variability on a time-scale of up to several hours (Dzhakusheva et al. 1988). Incidentally, this rapid polarimetric variability has no correspondence in photometry.

Type
Flares in T Tauri Stars
Information
International Astronomical Union Colloquium , Volume 151: Flares and Flashes , 1995 , pp. 227 - 228
Copyright
Copyright © Springer-Verlag 1995

References

Bergner, Yu.K., Bondarenko, S.L., Miroshnichenko, A.S., Moralev, Yu.D., Schumacher, A.V., Yudin, R.V., Yutanov, N.Yu.: 1988, Izv.GAO AN SSSR, vol. 205, p. 142 Google Scholar
Dzhakusheva, K.G. et al., 1988, Sov. Astr. Lett. 14, 317 Google Scholar
Dolginov, A.Z., Gnedin, Yu.N., Silant’ev, N.A., 1979, Dissemination and Polarization of Radiation in Space, Nauka, Moscow Google Scholar
Amnuel, P.R., Guseinov, O.H., Rakhamimov, Sh.Yu., 1979, ApJS 41, 327 Google Scholar
Miroshnichenko, A.S., Yudin, R.V., 1993, Astrophys. Space Sci. Library 186, p. 173 CrossRefGoogle Scholar