The period variation of the double mode high amplitude δ Scuti variable VZ Cnc
نویسندگان
چکیده
منابع مشابه
Incidence of high-amplitude δ Scuti type variable stars
An order-of-magnitude estimate for the incidence of high-amplitude δ Scuti-type variable stars (HADS) in the δ Scuti area of the H-R diagram is calculated. Using a model for the stellar distribution in the Milky Way, we calculate the number of stars that are expected to fall in the δ Scuti area of the H-R diagram within the magnitude range and sky coverage of the ROTSE Survey for Variables I (R...
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Hipparcos parallaxes of high–amplitude δ Scuti stars are used to derive a period–luminosity relation with a scatter of about ±0.1 mag, which is independent from photometric calibrations to absolute luminosities. Comparisonswith several P–L relations from the literature show satisfactory agreement, and all deviations from theHipparcosmean relation canbe explainedby uncertainties in the data avai...
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The relations between high{amplitude Scuti stars and the much more abundant low{amplitude Sct variables are not clear. Both groups have similar periods and seem to have almost the same basic physical properties , although their light{curve characteristics are very diierent. In the last few years much improved observational data have been published, and improved theoretical physics | in particul...
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We present yb time–series CCD photometry of the high–amplitude δ Scuti star V 1162 Ori. A period break and a significant decrease in amplitude (50 percent) has been reported for this star by Hintz et al. (1998). New observations carried out over two observing seasons suggest that the period found by Hintz et al. (1998) was no longer valid in early 1998, and that the period again changed during ...
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ژورنال
عنوان ژورنال: Astrophysics and Space Science
سال: 2009
ISSN: 0004-640X,1572-946X
DOI: 10.1007/s10509-009-0147-y