Semi-analytical Formulas for the Fundamental Parameters of Galactic Early B Supergiants
The publication of new tables of calibration of some fundamental parameters of Galactic B0-B5 supergiants in the two classes $I_mathrm{a}$ and $I_mathrm{b} $ allows to particularize the eight parameters conjecture that model five fundamental parameters. The numerical expressions for visual magnit...
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| Format: | Article |
| Language: | English |
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Astronomical Observatory, Department of Astronomy, Belgrade
2009-12-01
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| Series: | Serbian Astronomical Journal |
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| Online Access: | http://saj.matf.bg.ac.rs/179/pdf/069-074.pdf |
| _version_ | 1818757598454743040 |
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| author | Zaninetti, L. |
| author_facet | Zaninetti, L. |
| author_sort | Zaninetti, L. |
| collection | DOAJ |
| description | The publication of new tables of calibration of some fundamental parameters of Galactic B0-B5 supergiants in the two classes $I_mathrm{a}$ and $I_mathrm{b} $ allows to particularize the eight parameters conjecture that model five fundamental parameters. The numerical expressions for visual magnitude, radius, mass, luminosity and surface gravity are derived for supergiants in the range of temperature between 29700 K and 15200 K. The availability of accurate tables of calibration allows us to estimate the efficiency of the derived formulas in reproducing the observed values. The average efficiency of the new formulas, expressed in percent, is 94 for the visual magnitude, 81 for the mass, 96 for the radius, 99 for the logarithm of the luminosity and 97 for the logarithm of the surface gravity. |
| first_indexed | 2024-12-18T06:13:29Z |
| format | Article |
| id | doaj.art-09358d1097034979a08bdfaac6ce5283 |
| institution | Directory Open Access Journal |
| issn | 1450-698X |
| language | English |
| last_indexed | 2024-12-18T06:13:29Z |
| publishDate | 2009-12-01 |
| publisher | Astronomical Observatory, Department of Astronomy, Belgrade |
| record_format | Article |
| series | Serbian Astronomical Journal |
| spelling | doaj.art-09358d1097034979a08bdfaac6ce52832022-12-21T21:18:19ZengAstronomical Observatory, Department of Astronomy, BelgradeSerbian Astronomical Journal1450-698X2009-12-011796974Semi-analytical Formulas for the Fundamental Parameters of Galactic Early B SupergiantsZaninetti, L.The publication of new tables of calibration of some fundamental parameters of Galactic B0-B5 supergiants in the two classes $I_mathrm{a}$ and $I_mathrm{b} $ allows to particularize the eight parameters conjecture that model five fundamental parameters. The numerical expressions for visual magnitude, radius, mass, luminosity and surface gravity are derived for supergiants in the range of temperature between 29700 K and 15200 K. The availability of accurate tables of calibration allows us to estimate the efficiency of the derived formulas in reproducing the observed values. The average efficiency of the new formulas, expressed in percent, is 94 for the visual magnitude, 81 for the mass, 96 for the radius, 99 for the logarithm of the luminosity and 97 for the logarithm of the surface gravity.http://saj.matf.bg.ac.rs/179/pdf/069-074.pdfStars: fundamental parametersHertzsprung-Russell (HR) and C-MStars: general |
| spellingShingle | Zaninetti, L. Semi-analytical Formulas for the Fundamental Parameters of Galactic Early B Supergiants Serbian Astronomical Journal Stars: fundamental parameters Hertzsprung-Russell (HR) and C-M Stars: general |
| title | Semi-analytical Formulas for the Fundamental Parameters of Galactic Early B Supergiants |
| title_full | Semi-analytical Formulas for the Fundamental Parameters of Galactic Early B Supergiants |
| title_fullStr | Semi-analytical Formulas for the Fundamental Parameters of Galactic Early B Supergiants |
| title_full_unstemmed | Semi-analytical Formulas for the Fundamental Parameters of Galactic Early B Supergiants |
| title_short | Semi-analytical Formulas for the Fundamental Parameters of Galactic Early B Supergiants |
| title_sort | semi analytical formulas for the fundamental parameters of galactic early b supergiants |
| topic | Stars: fundamental parameters Hertzsprung-Russell (HR) and C-M Stars: general |
| url | http://saj.matf.bg.ac.rs/179/pdf/069-074.pdf |
| work_keys_str_mv | AT zaninettil semianalyticalformulasforthefundamentalparametersofgalacticearlybsupergiants |