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| Description
| - e present an analysis of new spectroscopic observations of the bright Be star kappa Dra obtained at the Ondrejov observatory during 1992-2003 and UBV photometric observations secured at several observatories. General characteristics and a line identification of the spectrum of kappa Dra are obtained in the regions 3730-5650 A and 5850-7800 A by a comparison with the theoretical spectrum. The fundamental stellar parameters have been obtained from a comparison with a grid of NLTE model atmospheres. The best fit was found for T_eff =14\ 000 K, log g = 3.5, and v sin i = 170 km/s. These values together with a Hipparcos parallax lead to a stellar mass M= 4.8 +/- 0.8 M_S and radius R=6.4 +/- 0.5 R_S. It is encouraging to see that these values agree well with the expected evolutionary mass and radius for the effective temperature we derived. Long-term variations of kappa Dra were analysed using measurements of equivalent widths, central intensities, peak intensities of emission lines and emission peak veloci
- e present an analysis of new spectroscopic observations of the bright Be star kappa Dra obtained at the Ondrejov observatory during 1992-2003 and UBV photometric observations secured at several observatories. General characteristics and a line identification of the spectrum of kappa Dra are obtained in the regions 3730-5650 A and 5850-7800 A by a comparison with the theoretical spectrum. The fundamental stellar parameters have been obtained from a comparison with a grid of NLTE model atmospheres. The best fit was found for T_eff =14\ 000 K, log g = 3.5, and v sin i = 170 km/s. These values together with a Hipparcos parallax lead to a stellar mass M= 4.8 +/- 0.8 M_S and radius R=6.4 +/- 0.5 R_S. It is encouraging to see that these values agree well with the expected evolutionary mass and radius for the effective temperature we derived. Long-term variations of kappa Dra were analysed using measurements of equivalent widths, central intensities, peak intensities of emission lines and emission peak veloci (en)
- Analyzujeme nová spektroskopická pozorování jasné Be hvězdy kapa Dra, získaná na Ondřejovské hvězdárně v letech 1992-2003, a UBV fotometrická měření pocházející z několika pozorovacích míst. Obecné charakteristiky hvězdy a identifikace čar byly získány srovnáním s teoretickým spektrem v intervalu vlnových délek 3730-5650 A a 5850-7800 A. Základní hvězdné parametry byly stanoveny porovnáním se sítí NLTE modelů atmosfér. Pozorování nejlépe odpovídají hodnoty T_eff =14\ 000 K, log g = 3.5 a v sin i = 170 km/s. Tyto hodnoty spolu s paralaxou získanou družicí Hipparcos vedou k hodnotě hmotnosti M= 4.8 +/- 0.8 M_S a poloměru R=6.4 +/- 0.5 R_S. Je potěšující, že tyto hodnoty dobře odpovídají očekávané vývojové hmotnosti a poloměru pro zjištěnou efektivní teplotu. Dlouhodobá proměnnost kapy Dra byla analyzována pomocí změřených ekvivalentních šířek čar, jejich centrálních intenzit, intenzit maxima emisních čar a rozdílu maxim emisních čar pro cáry H alfa, H beta, H gama, H delta a některé další čáry helia, kř (cs)
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| Title
| - Vlastosti a povaha Be hvězd XXIII. Dlouhodobá proměnnost a fyzikální vlastnosti kapa Dra (cs)
- Properties and nature of Be stars XXIII. Long-term variations and physical properties of kappa Dra
- Properties and nature of Be stars XXIII. Long-term variations and physical properties of kappa Dra (en)
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| skos:prefLabel
| - Vlastosti a povaha Be hvězd XXIII. Dlouhodobá proměnnost a fyzikální vlastnosti kapa Dra (cs)
- Properties and nature of Be stars XXIII. Long-term variations and physical properties of kappa Dra
- Properties and nature of Be stars XXIII. Long-term variations and physical properties of kappa Dra (en)
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| skos:notation
| - RIV/00216224:14310/04:00011414!RIV08-GA0-14310___
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| http://linked.open.../vavai/riv/strany
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| http://linked.open...avai/riv/aktivita
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| http://linked.open...avai/riv/aktivity
| - P(GA205/01/0656), P(GA205/02/0445)
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| http://linked.open...iv/cisloPeriodika
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| http://linked.open...vai/riv/dodaniDat
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| http://linked.open...aciTvurceVysledku
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| http://linked.open.../riv/druhVysledku
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| http://linked.open...iv/duvernostUdaju
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| http://linked.open...titaPredkladatele
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| http://linked.open...dnocenehoVysledku
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| http://linked.open...ai/riv/idVysledku
| - RIV/00216224:14310/04:00011414
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| http://linked.open...riv/jazykVysledku
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| http://linked.open.../riv/klicovaSlova
| - stars: emission-line; Be - stars: individual: kappa Dra - line: profiles (en)
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| http://linked.open.../riv/klicoveSlovo
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| http://linked.open...odStatuVydavatele
| - FR - Francouzská republika
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| http://linked.open...ontrolniKodProRIV
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| http://linked.open...i/riv/nazevZdroje
| - Astronomy and Astrophysics
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| http://linked.open...in/vavai/riv/obor
| |
| http://linked.open...ichTvurcuVysledku
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| http://linked.open...cetTvurcuVysledku
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| http://linked.open...vavai/riv/projekt
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| http://linked.open...UplatneniVysledku
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| http://linked.open...v/svazekPeriodika
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| http://linked.open...iv/tvurceVysledku
| - Hadrava, Petr
- Harmanec, Petr
- Korčáková, Daniela
- Votruba, Viktor
- Škoda, Petr
- Šlechta, Miroslav
- Koubský, Pavel
- Krtička, Jiří
- Kubát, Jiří
- Ak, H.
- Božič, Hrvoj
- Saad, Somaya M.
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| issn
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| number of pages
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| http://localhost/t...ganizacniJednotka
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