Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
5487837 | New Astronomy | 2017 | 11 Pages |
Abstract
We report the results of spectral and photometric observations of SU UMa. Available spectra from International Ultraviolet Explorer (IUE) and CCD photometry of five nights were used. Some profiles revealing the variations of some spectral lines at different times are presented. There is variation with time for photometric observations and the brightness of SU UMa is changed from 12.9âmag. to 15.6âmag in 5 nights with clear display of burst. The ultraviolet luminosity for emitting region is in the range of (6.9*1030Â erg sâ1). The mass accretion rate is in the range of (9.8*10â13Â Mâyrâ1). The line flux modulations at different times can be explained in terms of the mass transfer instability model (Bath 1973).
Keywords
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Physical Sciences and Engineering
Physics and Astronomy
Astronomy and Astrophysics
Authors
I. Zead, S.M. Saad, M.R. Sanad, M.M. Behary, K. Gadallah,