EE CEP 2014年日食的国际观察活动

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EE CEP 2014年日食的国际观察活动

International observational campaign of the 2014 eclipse of EE Cep

论文作者

Pieńkowski, D., Gałan, C., Tomov, T., Gazeas, K., Wychudzki, P., Mikołajewski, M., Kubicki, D., Staels, B., Zoła, S., Pakońska, P., Dȩbski, B., Kundera, T., Ogłoza, W., Dróżdż, M., Baran, A., Winiarski, M., Siwak, M., Dimitrov, D., Kjurkchieva, D., Marchev, D., Armiński, A., Miller, I., Kołaczkowski, Z., Moździerski, D., Zahajkiewicz, E., Bruś, P., Pigulski, A., Smela, T., Conseil, E., Boyd, D., Conidis, G. J., Plauchu-Frayn, I., Heras, T. A., Kardasis, E., Biskupski, M., Kneip, R., Hambálek, L., Pribulla, T., Kundra, E., Nedoroščik, J., Lopatovský, J., Garai, Z., Rodriguez, D., Kamiński, T., Dubois, F., Logie, L., Blanco, A. Capetillo, Kankiewicz, P., Świerczyński, E., Martignoni, M., Sergey, I., Qvam, J. Kare Trandem, Semkov, E., Ibryamov, S., Peneva, S., Carballo, J. -L. Gonzalez, Ribeiro, J., Dean, S., Apostolovska, G., Donchev, Z., Corp, L., McDonald, P., Rodriguez, M., Sanchez, A., Wiersema, K., Conseil, E., Menke, J., Sergey, I., Richardson, N.

论文摘要

语境。 EE CEP是少数几种截然不同的二进制系统之一，其围绕类似于εAur的无形对象的黑暗，尘土飞扬。该系统的特征是灰色和不对称的每5.6岁，其光度深度有显着变化，范围从〜0 m .5到〜2 m .0。目标。 EE Cep Eclipse在2014年的观察活动的主要目的是测试磁盘进动的模型（Galan等，2012）。我们期望这种日食将是最深的，深度约为2 m .0。方法。我们收集了来自欧洲和北美近30种乐器的多色观测。此光度数据涵盖日食和周围的243夜。我们还分析了几种仪器的低分辨率和高分辨率光谱。结果。日食是浅的，深度为0 m .71在V波段中。多色光度法说明了日食期间的小颜色变化，总幅度为〜+0 m。 15在B-I颜色指数中。 The linear ephemeris for this system is updated by including new times of minima, measured from the three most recent eclipses at epochs E = 9, 10 and 11. New spectroscopic observations were acquired, covering orbital phases around the eclipse, which were not observed in the past and increased the data sample, filling some gaps and giving a better insight into the evolution of the H α and NaI spectral line profiles during the primary日食。结论。 2014年EE CEP的日食比预期的0 m .71而不是〜2 m。 0。这意味着我们的磁盘预动力模型需要修订。

Context. EE Cep is one of few eclipsing binary systems with a dark, dusty disk around an invisible object similar to ε Aur. The system is characterized by grey and asymmetric eclipses every 5.6 yr, with a significant variation in their photometric depth, ranging from ~ 0 m .5 to ~ 2 m .0. Aims. The main aim of the observational campaign of the EE Cep eclipse in 2014 was to test the model of disk precession (Galan et al. 2012). We expected that this eclipse would be one of the deepest with a depth of ~ 2 m .0. Methods. We collected multicolor observations from almost 30 instruments located in Europe and North America. This photometric data covers 243 nights during and around the eclipse. We also analyse the low- and high-resolution spectra from several instruments. Results. The eclipse was shallow with a depth of 0 m .71 in V-band. The multicolor photometry illustrates small color changes during the eclipse with a total amplitude of order ~ +0 m . 15 in B-I color index. The linear ephemeris for this system is updated by including new times of minima, measured from the three most recent eclipses at epochs E = 9, 10 and 11. New spectroscopic observations were acquired, covering orbital phases around the eclipse, which were not observed in the past and increased the data sample, filling some gaps and giving a better insight into the evolution of the H α and NaI spectral line profiles during the primary eclipse. Conclusions. The eclipse of EE Cep in 2014 was shallower than expected 0 m .71 instead of ~ 2 m . 0. This means that our model of disk precession needs revision.

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