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          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents

ID: 660950.0, MPI für Astronomie / Publikationen_mpia
International observational campaigns of the last two eclipses in EE Cephei: 2003 and 2008/9
Authors:Galan, C.; Mikołajewski, M.; Tomov, T.; Graczyk, D.; Apostolovska, G.; Barzova, I.; Bellas-Velidis, I.; Bilkina, B.; Blake, R. M.; Bolton, C. T.; Bondar, A.; Brat, L.; Brozek, T.; Budzisz, B.; Cikała, M.; Csák, B.; Dapergolas, A.; Dimitrov, D.; Dobierski, P.; Drahus, M.; Dróżdż, M.; Dvorak, S.; Elder, L.; Frąckowiak, S.; Galazutdinov, G.; Gazeas, K.; Georgiev, L.; Gere, B.; Goździewski, K.; Grinin, V. P.; Gromadzki, M.; Hajduk, M.; Heras, T. A.; Hopkins, J.; Iliev, I.; Janowski, J.; Kocián, R.; Kołaczkowski, Z.; Kolev, D.; Kopacki, G.; Krzesiński, J.; Kučáková, H.; Kuligowska, E.; Kundera, T.; Kurpińska-Winiarska, M.; Kuźmicz, A.; Liakos, A.; Lister, T. A.; Maciejewski, G.; Majcher, A.; Majewska, A.; Marrese, P. M.; Michalska, G.; Migaszewski, C.; Miller, I.; Munari, U.; Musaev, F.; Myers, G.; Narwid, A.; Németh, P.; Niarchos, P.; Niemczura, E.; Ogłoza, W.; Ögmen, Y.; Oksanen, A.; Osiwała, J.; Peneva, S.; Pigulski, A.; Popov, V.; Pych, W.; Pye, J.; Ragan, E.; Roukema, B. F.; Różański, P. T.; Semkov, E.; Siwak, M.; Staels, B.; Stateva, I.; Stempels, H. C.; Steślicki, M.; Świerczyński, E.; Szymański, T.; Tomov, N.; Waniak, W.; Wiecek, M.; Winiarski, M.; Wychudzki, P.; Zajczyk, A.; Zoła, S.; Zwitter, T.
Date of Publication (YYYY-MM-DD):2012
Title of Journal:Astronomy and Astrophysics
Journal Abbrev.:A & A
Start Page:id.A53
Review Status:not specified
Audience:Not Specified
Abstract / Description:Context. EE Cep is an unusual long-period (5.6 yr) eclipsing binary discovered during the mid-twentieth century. It undergoes almost-grey eclipses that vary in terms of both depth and duration at different epochs. The system consists of a Be type star and a dark dusty disk around an invisible companion. EE Cep together with the widely studied ɛ Aur are the only two known cases of long-period eclipsing binaries with a dark, dusty disk component responsible for periodic obscurations. <BR /> Aims: Two observational campaigns were carried out during the eclipses of EE Cep in 2003 and 2008/9 to verify whether the eclipsing body in the system is indeed a dark disk and to understand the observed changes in the depths and durations of the eclipses. <BR /> Methods: Multicolour photometric data and spectroscopic observations performed at both low and high resolutions were collected with several dozen instruments located in Europe and North America. We numerically modelled the variations in brightness and colour during the eclipses. We tested models with different disk structure, taking into consideration the inhomogeneous surface brightness of the Be star. We considered the possibility of disk precession. <BR /> Results: The complete set of observational data collected during the last three eclipses are made available to the astronomical community. The 2003 and 2008/9 eclipses of
Free Keywords:binaries: eclipsing; circumstellar matter; stars: emission-line; Be; planetary systems
External Publication Status:published
Document Type:Article
Communicated by:N. N.
Affiliations:MPI für Astronomie
Identifiers:URL:http://cdsads.u-strasbg.fr/abs/2012A%26A...544A..5... [ID No:1]
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