<abstract xmlns="http://www.w3.org/1999/xhtml">We report the results of spectral and photometric observations of DQ Her. Available spectra from International Ultraviolet Explorer (IUE), Hubble Space Telescope Faint Object Spectrograph (HST - FOS) and CCD photometry of one night 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 DQ Her is changed from 14 mag. to 17.7 mag with clear display of burst. The ultraviolet luminosity for emitting region is in the range of (1.9<italic>x</italic>1031<italic>erg s</italic>−1). The mass accretion rate is in the range of (3.5<italic>x</italic>10−12<italic>M⊙yr</italic>−1). The line flux modulations at different times can be explained in terms of the accretion curtain model for intermediate polars, Kim &amp; Beuermann (1996).</abstract>

We report the results of spectral and photometric observations of DQ Her. Available spectra from International Ultraviolet Explorer (IUE), Hubble Space Telescope Faint Object Spectrograph (HST - FOS) and CCD photometry of one night 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 DQ Her is changed from 14 mag. to 17.7 mag with clear display of burst. The ultraviolet luminosity for emitting region is in the range of (1.9x1031erg s−1). The mass accretion rate is in the range of (3.5x10−12M⊙yr−1). The line flux modulations at different times can be explained in terms of the accretion curtain model for intermediate polars, Kim & Beuermann (1996).

Photometric and Spectroscopic Studies of the Intermediate -Polar Cataclysmic System DQ Her

Applied Mathematics and Nonlinear Sciences

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

We report the results of spectral and photometric observations of DQ Her. Available spectra from International Ultraviolet Explorer (IUE), Hubble Space...

Photometric and Spectroscopic Studies of the Intermediate -Polar Cataclysmic System DQ Her

Published Online: May 23, 2017

Page range: 181 - 194

Received: Mar 05, 2017

Accepted: May 23, 2017

DOI: https://doi.org/10.21042/AMNS.2017.1.00015

Keywords
Photometric, spectroscopic studies, polar cataclysmic system, celestial dynamics

© 2017 I. Zead, M. Saad, M. R. Sanad, M. M. Behary, K. Gadallah, A. Shokry, published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Photometric and Spectroscopic Studies of the Intermediate -Polar Cataclysmic System DQ Her

Published Online: May 23, 2017

Page range: 181 - 194

Received: Mar 05, 2017

Accepted: May 23, 2017

DOI: https://doi.org/10.21042/AMNS.2017.1.00015

KeywordsPhotometric, spectroscopic studies, polar cataclysmic system, celestial dynamics

© 2017 I. Zead, M. Saad, M. R. Sanad, M. M. Behary, K. Gadallah, A. Shokry, published by Sciendo

This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

Keywords
Photometric, spectroscopic studies, polar cataclysmic system, celestial dynamics