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Title:
PG0027 + 260 - an example of a class of cataclysmic binaries with mysterious, but consistent, behavior
Authors:
Thorstensen, John R.; Ringwald, F. A.; Wade, Richard A.; Schmidt, Gary D.; Norsworthy, Jane E.
Affiliation:
AA(Dartmouth College, Hanover, NH), AB(Dartmouth College, Hanover, NH), AC(Pennsylvania State University, University Park), AD(Steward Observatory, Tucson, AZ), AE(Steward Observatory, Tucson, AZ)
Publication:
Astronomical Journal (ISSN 0004-6256), vol. 102, July 1991, p. 272-283. (AJ Homepage)
Publication Date:
07/1991
Category:
Astrophysics
Origin:
STI
NASA/STI Keywords:
CATACLYSMIC VARIABLES, ECLIPSING BINARY STARS, NOVAE, STELLAR SPECTRA, EMISSION SPECTRA, LIGHT CURVE, ULTRAVIOLET SPECTRA, VISIBLE SPECTRUM
DOI:
10.1086/115874
Bibliographic Code:
1991AJ....102..272T

Abstract

This paper reports extensive optical observations on the PG0027 + 260 binary, carried out on August 1984 with the 1.3 McGraw-Hill telescope and Mark II spectrometer at Michigan-Dartmouth-MIT Observatory on Kitt Peak. It is shown that this object is an eclipsing novalike variable with an orbital period of 3.51 hr. The PG0027 + 260 displays several unexplained phenomena which are remarkably similar to those of the SW Sex, DW UMa, and V1315 Aql, which are eclipsing novalike stars with periods between 3 and 4 hrs. The eclipse of the PG0027 + 260 is modeled, and it is shown that, while the mean eclipse light curve is easy to match, there is no simple explanation for the variable depth.

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