THE SHELL ACTIVITY OF Be/SHELL STAR ζ TAURI IN 1985 - 1997
The study results of highresolution CCD-spectra of the V/R variable Be-shell star ζ Tauri covering 1985 - 1997 obtained at the 2.6-m telescope of the Crimean Astrophysical Observatory are present. The equivalent width, the violet and red intensities and V/R ratio of the Hα emission line and equivale...
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| Format: | Article |
| Language: | English |
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Odessa I. I. Mechnykov National University
2017-06-01
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| Series: | Odessa Astronomical Publications |
| Online Access: | http://oap.onu.edu.ua/article/view/105387 |
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doaj-9d13a8f64be943bd828edd69062eb77c2020-11-25T03:10:34ZengOdessa I. I. Mechnykov National UniversityOdessa Astronomical Publications1810-42152017-06-01100717510.18524/1810-4215.1997.10.105387105387THE SHELL ACTIVITY OF Be/SHELL STAR ζ TAURI IN 1985 - 1997E. A. Pan'ko0Astronomical observatory by name N.D.Kalinenkov, Nikolaev State Pedagogical InstituteThe study results of highresolution CCD-spectra of the V/R variable Be-shell star ζ Tauri covering 1985 - 1997 obtained at the 2.6-m telescope of the Crimean Astrophysical Observatory are present. The equivalent width, the violet and red intensities and V/R ratio of the Hα emission line and equivalent width and central depth of the HeII 6678 line were measured. The shell activity was low in 1985-1988: the equivalent width Hog emission line were about 7-12 Å V/R ratio fluctuated in an irregular manner. The active shell phase started in 1989 and then equivalent width of Hα emission line increased to 19-26 Å in 1992 - 1995; V/R cyclic changes and compound structure of Hα emission line profiles reappeared. In 1996 - 1997 the equivalent wight of Hα line slightly lessened, but compound profiles structure remained.http://oap.onu.edu.ua/article/view/105387 |
| collection |
DOAJ |
| language |
English |
| format |
Article |
| sources |
DOAJ |
| author |
E. A. Pan'ko |
| spellingShingle |
E. A. Pan'ko THE SHELL ACTIVITY OF Be/SHELL STAR ζ TAURI IN 1985 - 1997 Odessa Astronomical Publications |
| author_facet |
E. A. Pan'ko |
| author_sort |
E. A. Pan'ko |
| title |
THE SHELL ACTIVITY OF Be/SHELL STAR ζ TAURI IN 1985 - 1997 |
| title_short |
THE SHELL ACTIVITY OF Be/SHELL STAR ζ TAURI IN 1985 - 1997 |
| title_full |
THE SHELL ACTIVITY OF Be/SHELL STAR ζ TAURI IN 1985 - 1997 |
| title_fullStr |
THE SHELL ACTIVITY OF Be/SHELL STAR ζ TAURI IN 1985 - 1997 |
| title_full_unstemmed |
THE SHELL ACTIVITY OF Be/SHELL STAR ζ TAURI IN 1985 - 1997 |
| title_sort |
shell activity of be/shell star ζ tauri in 1985 - 1997 |
| publisher |
Odessa I. I. Mechnykov National University |
| series |
Odessa Astronomical Publications |
| issn |
1810-4215 |
| publishDate |
2017-06-01 |
| description |
The study results of highresolution CCD-spectra of the V/R variable Be-shell star ζ Tauri covering 1985 - 1997 obtained at the 2.6-m telescope of the Crimean Astrophysical Observatory are present. The equivalent width, the violet and red intensities and V/R ratio of the Hα emission line and equivalent width and central depth of the HeII 6678 line were measured. The shell activity was low in 1985-1988: the equivalent width Hog emission line were about 7-12 Å V/R ratio fluctuated in an irregular manner. The active shell phase started in 1989 and then equivalent width of Hα emission line increased to 19-26 Å in 1992 - 1995; V/R cyclic changes and compound structure of Hα emission line profiles reappeared. In 1996 - 1997 the equivalent wight of Hα line slightly lessened, but compound profiles structure remained. |
| url |
http://oap.onu.edu.ua/article/view/105387 |
| work_keys_str_mv |
AT eapanko theshellactivityofbeshellstarztauriin19851997 AT eapanko shellactivityofbeshellstarztauriin19851997 |
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1724658642739789824 |