The Behlen Observatory Variable Star Survey.IV.
نویسندگان
چکیده
منابع مشابه
The Behlen Observatory Variable Star Survey: First Results
Various light curve parameters are presented for the first 93 objects in a photometric survey of poorly studied variable stars. Stars from the General Catalogue of Variable Stars (GCVS) fainter than tenth magnitude, north of the equator which were classified as pulsating variables (but excluding the long period, semiregular, and irregular variables) were included. It is shown that two parameter...
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We show that a straightforward application of the predicted relation connecting the absolute K magnitude of fundamental RR Lyrae variables to their period and metal content, together with current evolutionary predictions on the mass and luminos-ity of Horizontal Branch stars, supply a distance estimate to the prototype star RR Lyr in close agreement with the recent parallax determination by HST...
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The star height hierarchy (resp. the variable hierarchy) results in classifying μ-terms into classes according to the nested depth of fixed point operators (resp. to the number of bound variables). We prove, under some assumptions, that the variable hierarchy is a proper refinement of the star height hierarchy. We mean that the non collapse of the variable hierarchy implies the non collapse of ...
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We present photometric and highand low-resolution spectroscopic observations of the unusual outburst of V838 Mon. The data were collected at the NAO Rozhen, Bulgaria and at the Torun Observatory, Poland. Analysis of the peculiar behavior of the spectrum of the star is given. The star’s radial velocity of +60 km/s is derived. A brief discussion concerning the nature of the object is
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ژورنال
عنوان ژورنال: The Astronomical Journal
سال: 1996
ISSN: 0004-6256
DOI: 10.1086/118220