Abstract
view Abstract Citations (8) References (10) Co-Reads Similar Papers Volume Content Graphics Metrics Export Citation NASA/ADS Narrow-Band Photometry of Five Combination-Variable Stars and the X-Ray Source CYG X-2 Johnson, H. M. ; Golson, J. C. Abstract We have observed HD 4174, AG Dra, AG Peg, MHa 328-116, CH Cyg, and Cyg X-2 in narrow bands around H13 and in a narrow band which includes He ii X4686 and N iii X4640 when they are present. Some of these previously active stars were quiet on the dates of our work. But the light curves of CH Cyg suggest eclipses in H$ and in the continuum as well as small flares in the continuum. The light curves of Cyg X-2 show that He ii X4686 weakens as H~3 absorption increases on one date, while independent variation of the continuum occurs from one date to the next. There is no common pattern of variability in these stars Publication: The Astrophysical Journal Pub Date: February 1969 DOI: 10.1086/180309 Bibcode: 1969ApJ...155L..91J full text sources ADS | data products SIMBAD (9)
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