VARIATIONS OF THE β CEPHEI Hα LINE PARAMETERS IN 1993 - 1998.
We use high-dispersion CCD spectrograms obtained in 1993 - 1998 to study parameter variations of the absorption and emission components Hα line of the star β Cephei. We show that radial velocity of the emission component does not depend on star pulsation and systematically differs from the star radi...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Odessa I. I. Mechnykov National University
2017-03-01
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| Series: | Odessa Astronomical Publications |
| Online Access: | http://oap.onu.edu.ua/article/view/93111 |
| _version_ | 1818403871937003520 |
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| author | E. A. Panko A. E. Tarasov |
| author_facet | E. A. Panko A. E. Tarasov |
| author_sort | E. A. Panko |
| collection | DOAJ |
| description | We use high-dispersion CCD spectrograms obtained in 1993 - 1998 to study parameter variations of the absorption and emission components Hα line of the star β Cephei. We show that radial velocity of the emission component does not depend on star pulsation and systematically differs from the star radial velocity. The star radial velocity measured on doublet CII lines and corrected for pulsation decreases quickly than ensues from orbital moving ephemeris. We suppose the envelope appears around the closer β Cep companion, and the changes of the radial velocity of the emission components Hα partially reflects the orbital moving of the closer companion. It is possible, the system periastron passage will come earlier than ensues from the present significance of the orbital period. |
| first_indexed | 2024-12-14T08:31:09Z |
| format | Article |
| id | doaj.art-26d7bdf62c9443cab9467857f5dcf22d |
| institution | Directory Open Access Journal |
| issn | 1810-4215 |
| language | English |
| last_indexed | 2024-12-14T08:31:09Z |
| publishDate | 2017-03-01 |
| publisher | Odessa I. I. Mechnykov National University |
| record_format | Article |
| series | Odessa Astronomical Publications |
| spelling | doaj.art-26d7bdf62c9443cab9467857f5dcf22d2022-12-21T23:09:31ZengOdessa I. I. Mechnykov National UniversityOdessa Astronomical Publications1810-42152017-03-0112022723010.18524/1810-4215.1999.12.9311193111VARIATIONS OF THE β CEPHEI Hα LINE PARAMETERS IN 1993 - 1998.E. A. Panko0A. E. TarasovKalinenkov astronomical observatory, Nikolaev State Pedagogical University, Nikolskaja, 24, Nikolaev, 327030, UkraineWe use high-dispersion CCD spectrograms obtained in 1993 - 1998 to study parameter variations of the absorption and emission components Hα line of the star β Cephei. We show that radial velocity of the emission component does not depend on star pulsation and systematically differs from the star radial velocity. The star radial velocity measured on doublet CII lines and corrected for pulsation decreases quickly than ensues from orbital moving ephemeris. We suppose the envelope appears around the closer β Cep companion, and the changes of the radial velocity of the emission components Hα partially reflects the orbital moving of the closer companion. It is possible, the system periastron passage will come earlier than ensues from the present significance of the orbital period.http://oap.onu.edu.ua/article/view/93111 |
| spellingShingle | E. A. Panko A. E. Tarasov VARIATIONS OF THE β CEPHEI Hα LINE PARAMETERS IN 1993 - 1998. Odessa Astronomical Publications |
| title | VARIATIONS OF THE β CEPHEI Hα LINE PARAMETERS IN 1993 - 1998. |
| title_full | VARIATIONS OF THE β CEPHEI Hα LINE PARAMETERS IN 1993 - 1998. |
| title_fullStr | VARIATIONS OF THE β CEPHEI Hα LINE PARAMETERS IN 1993 - 1998. |
| title_full_unstemmed | VARIATIONS OF THE β CEPHEI Hα LINE PARAMETERS IN 1993 - 1998. |
| title_short | VARIATIONS OF THE β CEPHEI Hα LINE PARAMETERS IN 1993 - 1998. |
| title_sort | variations of the 946 cephei h 945 line parameters in 1993 1998 |
| url | http://oap.onu.edu.ua/article/view/93111 |
| work_keys_str_mv | AT eapanko variationsofthe946cepheih945lineparametersin19931998 AT aetarasov variationsofthe946cepheih945lineparametersin19931998 |