| MIKULÁŠEK, Zdeněk, Augustin SKOPAL, Miloslav ZEJDA, Ondřej PEJCHA, Luboš KOHOUTEK, David MOTL, A. A. VITTONE a L. ERRICO. Light Variations of the Anomalous Central Star of Planetary Nebula Sh 2-71. In Active OB-Stars: Laboratories for Stellare and Circumstellar Physics, Proceedings of the conference held 29 August - 2 September, 2005 at Hokkai-Gakuen University, Sapporo, Japan. San Francisco: Astronomical Society of the Pacific, 2005, s. 469-471. |
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@inproceedings{599316,
author = {Mikulášek, Zdeněk and Skopal, Augustin and Zejda, Miloslav and Pejcha, Ondřej and Kohoutek, Luboš and Motl, David and Vittone, A. A. and Errico, L.},
address = {San Francisco},
booktitle = {Active OB-Stars: Laboratories for Stellare and Circumstellar Physics, Proceedings of the conference held 29 August - 2 September, 2005 at Hokkai-Gakuen University, Sapporo, Japan},
keywords = {planetary nebulae; variable stars},
language = {eng},
location = {San Francisco},
pages = {469-471},
publisher = {Astronomical Society of the Pacific},
title = {Light Variations of the Anomalous Central Star of Planetary Nebula Sh 2-71},
year = {2005}
}
TY - JOUR
ID - 599316
AU - Mikulášek, Zdeněk - Skopal, Augustin - Zejda, Miloslav - Pejcha, Ondřej - Kohoutek, Luboš - Motl, David - Vittone, A. A. - Errico, L.
PY - 2005
TI - Light Variations of the Anomalous Central Star of Planetary Nebula Sh 2-71
PB - Astronomical Society of the Pacific
CY - San Francisco
KW - planetary nebulae
KW - variable stars
N2 - We present an analysis of light variations in UBVRI of the anomalous object in the center of planetary nebula Sh 2-71. We refined the linear ephemeris of the light maxima to JDmax = 2449862.0 + 68.101 (E-96), but also identified long-term, obviously non-periodic variations. The latter manifest themselves in large O-C shifts, a variable profile of light curves (hereafter LC) and changes in the mean brightness of the object. Our spectroscopic observations suggested the presence of a superdense nebula in the center of Sh 2-71.
ER -
MIKULÁŠEK, Zdeněk, Augustin SKOPAL, Miloslav ZEJDA, Ondřej PEJCHA, Luboš KOHOUTEK, David MOTL, A. A. VITTONE a L. ERRICO. Light Variations of the Anomalous Central Star of Planetary Nebula Sh 2-71. In \textit{Active OB-Stars: Laboratories for Stellare and Circumstellar Physics, Proceedings of the conference held 29 August - 2 September, 2005 at Hokkai-Gakuen University, Sapporo, Japan}. San Francisco: Astronomical Society of the Pacific, 2005, s.~469-471.
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