Light Curves of Symbiotic Stars in Massive Photometric Surveys I: D-Type Systems

• Autorzy: Gromadzki M. , Mikołajewska J. , Whitelock P. , Marang F.
• Języki publikacji: EN

Abstrakty

EN

ASAS, MACHO, OGLE and SAAO JHKL light curves of 13 stars, that have at some time been classified as D-type symbiotic stars, are analyzed. Most of the near-IR light curves that have been monitored over many years show long-term changes due to variable dust obscuration, in addition to the stellar pulsation. The distances to these objects are derived from the period-luminosity relation and estimates of the mass-loss rates made from the K0-[12] color. We reclassify AS 245 as an S-type symbiotic star with a semi-regular cool component and a pulsation period of about one year. The periods of the large amplitude pulsations of SS73 38 (463 days), AS 210 (423 days) and H2-38 (395 days) are estimated for the first time, confirming that they are symbiotic Miras. A comparison of the symbiotic Miras with normal Miras of similar pulsation period shows that the symbiotic stars have on average higher values of K0-[12]. This may indicate that they have higher mass-loss rates, or more likely that the dust which is being lost by the Mira is trapped within the binary system.

Słowa kluczowe

EN

binaries: symbiotic; Stars: individual: o Cet; Stars: individual: RX Pup; Stars: individual: V366 Car; Stars: individual: BI Cru; Stars: individual: SS73 38; Stars: individual: V347 Nor; Stars: individual: AS 210; Stars: individual: AS 245; Stars: individual: H 2-38; Stars: individual: RR Tel; Stars: individual: R Aqr; Stars: individual: StHA 55; Stars: individual: V335 Vul; Surveys

• Wydawca: Copernicus Foundation for Polish Astronomy
• Czasopismo: Acta Astronomica
• Rocznik: 2009
• Tom: Vol. 59, No. 2
• Strony: 169--191
• Opis fizyczny: Bibliogr. 48 poz., rys., tab., wykr.

Twórcy

autor

Gromadzki M.

• N. Copernicus Astronomical Center, Bartycka 18, 00-716 Warsaw, Poland

autor

Mikołajewska J.

• N. Copernicus Astronomical Center, Bartycka 18, 00-716 Warsaw, Poland

autor

Whitelock P.

• South African Astronomical Observatory, P.O. Box 9, Observatory, 7935, South Africa
• National Astrophysics and Space Science Programme, Department of Astronomy, University of Cape Town, Rondebosch, 7701, South Africa

autor

Marang F.

• South African Astronomical Observatory, P.O. Box 9, Observatory, 7935, South Africa

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