Photometry & spectroscopy of EE Cep: 2014-15

DOI

EE Cep is one of few eclipsing binary systems with a dark, dusty disk around an invisible object similar to epsilon Aur. The system is characterized by grey and asymmetric eclipses every 5.6yr, with a significant variation in their photometric depth, ranging from ~0.5mag to ~2.0mag. 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 ~2m.mag. 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. The eclipse was shallow with a depth of 0m.71 in V-band. The multicolor photometry illustrates small color changes during the eclipse with a total amplitude of order ~+0.15mag 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{alpha} and NaI spectral line profiles during the primary eclipse. The eclipse of EE Cep in 2014 was shallower than expected 0.71mag instead of ~2.0mag. This means that our model of disk precession needs revision.

Identifier
DOI http://doi.org/10.26093/cds/vizier.36390023
Source https://dc.g-vo.org/rr/q/lp/custom/CDS.VizieR/J/A+A/639/A23
Related Identifier https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/639/A23
Related Identifier http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/639/A23
Metadata Access http://dc.g-vo.org/rr/q/pmh/pubreg.xml?verb=GetRecord&metadataPrefix=oai_b2find&identifier=ivo://CDS.VizieR/J/A+A/639/A23
Provenance
Creator Pienkowski D.; Galan C.; Tomov T.; Gazeas K.; Wychudzki P.,Mikolajewski M.; Kubicki D.; Staels B.; Zola S.; Pakonska P.; Debski B.,Kundera T.; Ogloza W.; Drozdz M.; Baran A.; Winiarski M.; Siwak M.,Dimitrov D.; Kjurkchieva D.; Marchev D.; Arminski A.; Miller I.,Kolaczkowski Z.; Mozdzierski D.; Zahajkiewicz E.; Brus P.; Pigulski A.,Smela T.; Conseil E.; Boyd D.; Conidis G.J.; Plauchu-Frayn I.; Heras T.A.,Kardasis E.; Biskupski M.; Kneip R.; Hambalek L.; Pribulla T.; Kundra E.,Nedoroscik J.; Lopatovsky J.; Garai Z.; Rodriguez D.; Kaminski T.,Dubois F.; Logie L.; Blanco A.Capetillo; Kankiewicz P.; Swierczynski E.,Martignoni M.; Sergey I.; Kare Trandem Qvam J.; Semkov E.; Ibryamov S.,Peneva S.; Gonzalez Carballo J.-L.; Ribeiro J.; Dean S.; Apostolovska G.,Donchev Z.; Corp L.; McDonald P.; Rodriguez M.; Sanchez A.; Wiersema K.,Conseil E.; Menke J.; Richardson N.
Publisher CDS
Publication Year 2020
Rights https://cds.unistra.fr/vizier-org/licences_vizier.html
OpenAccess true
Contact CDS support team <cds-question(at)unistra.fr>
Representation
Resource Type Dataset; AstroObjects
Discipline Astrophysics and Astronomy; Interdisciplinary Astronomy; Natural Sciences; Observational Astronomy; Physics; Stellar Astronomy