Photometric and Spectroscopic Studies of the Intermediate -Polar Cataclysmic System DQ Her-Reference-Cited by-同舟云学术

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

Published:2017-01-01 Issue:1 Volume:2 Page:181-194
ISSN:2444-8656
Container-title:Applied Mathematics and Nonlinear Sciences
language:en
Short-container-title:

Author:

Zead I.¹,Saad M.¹,Sanad M. R.¹,Behary M. M.²,Gadallah K.²,Shokry A.¹

Affiliation:

1. National Research Institute of Astronomy and Geophysics (NRIAG) Department of Astronomy , Stellar Lab. , Helwan 11421, Cairo , Egypt

2. Department of Astronomy, Faculty of Sciences , El Azhar University , Cairo , Egypt

Abstract

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 (1.9x1031 erg s −1). The mass accretion rate is in the range of (3.5x10−12 M⊙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).

Publisher

Walter de Gruyter GmbH

Subject

Applied Mathematics,Engineering (miscellaneous),Modeling and Simulation,General Computer Science

Link

https://www.sciendo.com/pdf/10.21042/AMNS.2017.1.00015

Reference39 articles.

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3. D. A. H. Buckley and I. R. Tuohy, (1989), A spectroscopic, photometric, and X-ray study of the DQ Herculis system 1H0542-407, The Astrophysical Journal, 344, 376-398. doi 10.1086/167806

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