Millisecond optical photometry of the DQ Herculis objects

Details Millisecond optical photometry of the DQ Herculis objects Millisecond optical photometry of the DQ Herculis objects

Oct 1988

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988aj.....96.1420i&link_type=abstract

Astronomical Journal (ISSN 0004-6256), vol. 96, Oct. 1988, p. 1420-1425. Research supported by the Research Corp., American Astr

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7

Accretion Disks, Astronomical Photometry, Binary Stars, Cataclysmic Variables, Magnetic Stars, White Dwarf Stars, Black Body Radiation, Optical Emission Spectroscopy, Thermodynamic Properties

Scientific paper

The results of millisecond optical photometry of the DQ Herculis stars EX Hya, H2252-035, V1223 Sgr, and AE Aqr obtained at the Las Campanas Observatory and Cerro Tololo Inter-American Observatory during the years 1985, 1986, and 1987 are reported. The data for coherent and incoherent features are searched for. Coherent features (other than those previously known) were not detected for frequencies between 0.1 and 250 Hz at 4-sigma upper limits of 0.05-0.4 percent. Evidence is not found for 1-3 s, quasi-coherent features. Such features have been detected in the optical emission of the AM Her objects AN UMa, EF Eri, and E1405-451. Because of the similarities between AM Her and DQ Her objects, it was suggested that such quasi-coherent features might also be found in the DQ Her objects.

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