Multiwavelength Studies of Mira Ceti-type Variable Stars

Multiwavelength Studies of Mira Ceti-type Variable Stars

Since 1994, observations of a sample of about 20 Mira Ceti-type and semiregular variables have been carried out in three spectral ranges: radio (H 2 O maser line λ = 1.35 cm), optical (spectroscopy and UBV photometry) and infrared ( JHKLM photometry). Time series of the Hα emission intensity and H 2...

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Veröffentlicht in:Symposium - International Astronomical Union 1999, Vol.191, p.201-206
Hauptverfasser: Esipov, V.F., Pashchenko, M.I., Rudnitskij, G.M., Kozin, M.V., Lekht, E.E., Nadjip, A.E., Fomin, S.V.
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Sprache:eng
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Zusammenfassung:Since 1994, observations of a sample of about 20 Mira Ceti-type and semiregular variables have been carried out in three spectral ranges: radio (H 2 O maser line λ = 1.35 cm), optical (spectroscopy and UBV photometry) and infrared ( JHKLM photometry). Time series of the Hα emission intensity and H 2 O line flux, covering several periods of the stars, have been obtained. Correlation of the intensity variations of the H 2 O maser with optical variability in the maser stars RR Aql, U Ori, VX Sgr and others was confirmed. One of the most interesting results is the flare of the H 2 O maser emission in R Leo, which happened in autumn 1997, 14 months after a flare of the Hα emission.
ISSN:0074-1809
DOI:10.1017/S0074180900203082