Simultaneous UBVRI observations of the cataclysmic variable AE Aquarii: Temperatures and masses of fireballs†
Corresponding Author
R.K. Zamanov
Institute of Astronomy and National Astronomical Observatory, Bulgarian Academy of Sciences, 72 Tsarighradsko Shousse Blvd., 1784 Sofia, Bulgaria
Institute of Astronomy and National Astronomical Observatory, Bulgarian Academy of Sciences, 72 Tsarighradsko Shousse Blvd., 1784 Sofia, BulgariaSearch for more papers by this authorG.Y. Latev
Institute of Astronomy and National Astronomical Observatory, Bulgarian Academy of Sciences, 72 Tsarighradsko Shousse Blvd., 1784 Sofia, Bulgaria
Search for more papers by this authorK.A. Stoyanov
Institute of Astronomy and National Astronomical Observatory, Bulgarian Academy of Sciences, 72 Tsarighradsko Shousse Blvd., 1784 Sofia, Bulgaria
Search for more papers by this authorS. Boeva
Institute of Astronomy and National Astronomical Observatory, Bulgarian Academy of Sciences, 72 Tsarighradsko Shousse Blvd., 1784 Sofia, Bulgaria
Search for more papers by this authorB. Spassov
Institute of Astronomy and National Astronomical Observatory, Bulgarian Academy of Sciences, 72 Tsarighradsko Shousse Blvd., 1784 Sofia, Bulgaria
Search for more papers by this authorS.V. Tsvetkov
Institute of Astronomy and National Astronomical Observatory, Bulgarian Academy of Sciences, 72 Tsarighradsko Shousse Blvd., 1784 Sofia, Bulgaria
Search for more papers by this authorCorresponding Author
R.K. Zamanov
Institute of Astronomy and National Astronomical Observatory, Bulgarian Academy of Sciences, 72 Tsarighradsko Shousse Blvd., 1784 Sofia, Bulgaria
Institute of Astronomy and National Astronomical Observatory, Bulgarian Academy of Sciences, 72 Tsarighradsko Shousse Blvd., 1784 Sofia, BulgariaSearch for more papers by this authorG.Y. Latev
Institute of Astronomy and National Astronomical Observatory, Bulgarian Academy of Sciences, 72 Tsarighradsko Shousse Blvd., 1784 Sofia, Bulgaria
Search for more papers by this authorK.A. Stoyanov
Institute of Astronomy and National Astronomical Observatory, Bulgarian Academy of Sciences, 72 Tsarighradsko Shousse Blvd., 1784 Sofia, Bulgaria
Search for more papers by this authorS. Boeva
Institute of Astronomy and National Astronomical Observatory, Bulgarian Academy of Sciences, 72 Tsarighradsko Shousse Blvd., 1784 Sofia, Bulgaria
Search for more papers by this authorB. Spassov
Institute of Astronomy and National Astronomical Observatory, Bulgarian Academy of Sciences, 72 Tsarighradsko Shousse Blvd., 1784 Sofia, Bulgaria
Search for more papers by this authorS.V. Tsvetkov
Institute of Astronomy and National Astronomical Observatory, Bulgarian Academy of Sciences, 72 Tsarighradsko Shousse Blvd., 1784 Sofia, Bulgaria
Search for more papers by this authorBased on data collected with the telescopes at Bulgarian National Astronomical Observatory Rozhen and Belogradchick Astronomical Observatory.
Abstract
We report simultaneous multicolour observations in 5 bands (UBVRI) of the flickering variability of the cataclysmic variable AE Aqr. Our aim is to estimate the parameters (colours, temperature, size) of the fireballs that produce the optical flares. The observed rise times of the optical flares are in the interval 220-440 s. We estimate the dereddened colours of the fireballs as (U -B)0∼0.8-1.4, (B -V)0∼0.03-0.24, and (V -I)0∼0.26-0.78. We find for the fireballs temperatures of 10000-25000 K, masses of (7-90)x1019 g, and sizes of (3-7)x109 cm (using a distance of d = 86 pc). These values refer to the peak of the flares observed in the UBVRI bands. The data are available upon request from the authors (© 2012 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim)
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