Light Variations of the Anomalous Central Star of Planetary
Nebula Sh 2-71

D 2005

Light Variations of the Anomalous Central Star of Planetary Nebula Sh 2-71

MIKULÁŠEK, Zdeněk, Augustin SKOPAL, Miloslav ZEJDA, Ondřej PEJCHA, Luboš KOHOUTEK et. al.

Basic information

Original name

Light Variations of the Anomalous Central Star of Planetary Nebula Sh 2-71

Name in Czech

Světelné změny anomální centrální hvězdy planetární mlhoviny Sh 2-71

Authors

MIKULÁŠEK, Zdeněk (203 Czech Republic, guarantor), Augustin SKOPAL (703 Slovakia), Miloslav ZEJDA (203 Czech Republic), Ondřej PEJCHA (203 Czech Republic), Luboš KOHOUTEK (276 Germany), David MOTL (203 Czech Republic), A. A. VITTONE (380 Italy) and L. ERRICO (380 Italy)

Edition

San Francisco, 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, p. 469-471, 3 pp. 2005

Publisher

Astronomical Society of the Pacific

Other information

Language

English

Type of outcome

Stať ve sborníku

Field of Study

10308 Astronomy

Country of publisher

United States of America

Confidentiality degree

není předmětem státního či obchodního tajemství

RIV identification code

RIV/00216224:14310/05:00012965

Organization unit

Faculty of Science

UT WoS

000246180400067

Keywords in English

planetary nebulae; variable stars

Abstract

ORIG CZ

V originále

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.

In Czech

Předkládáme rozbor světelných změn v UBVRI anomálního objektu v centru planetární mlhoviny Sh 2-71. Zpřesnili jsme lineární efemeridu maxima jasnosti na JDmax = 2449862.0 + 68.101 (E-96), současně jsme též identifikovali dlouhodobé, zřejmě aperiodické variace, jež se projevují velkými posuvy (O-C), změnami profilů světelných křivek a změnami střední jasnosti objektu. Naše spektroskopická pozorování ukazují na přítomnost suprahusté mlhoviny v centru Sh 2-71.

Links

GA205/04/1267, research and development project

Name: Okolohvězdné obálky horkých hvězd

Investor: Czech Science Foundation, Circumstellar envelopes of hot stars

ME 128, research and development project

Name: Alternativní přístupy k financování celoživotního učení

Citovat

MIKULÁŠEK, Zdeněk, Augustin SKOPAL, Miloslav ZEJDA, Ondřej PEJCHA, Luboš KOHOUTEK, David MOTL, A. A. VITTONE and 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, p. 469-471.

@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 and 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, p.~469-471.

Detailed Information on Publication Record