A Method of Improving Standard Stellar Luminosities with Multiband Standard Bolometric Corrections

• Autorzy: Bakış V. , Eker Z.

Identyfikatory

DOI

10.32023/0001-5237/72.4

• Języki publikacji: EN

Abstrakty

EN

Standard luminosity (L) of 406 main-sequence stars with the most accurate astrophysical parameters are calculated from their absolute magnitudes and bolometric corrections at Johnson BV, and Gaia EDR3 G, G_BP, G_RP filters. Required multiband BC and BC-T_eff relations are obtained first from the parameters of 209 Double-lined Detached Eclipsing Binaries with main-sequence components and Gaia EDR3 parallaxes. A simplified SED is formulated to give filter dependent component light contributions and interstellar dimming, which are essential in computing BC of a component, virtually at any filter. The mean standard L of a star is calculated from the mean M_bolwhich is a mathematical average of independent M_boll values predicted at different filters, while the uncertainty of L is the uncertainty propagated from the uncertainty of the mean M_bol. The mean standard L of the sample stars are compared to the corresponding L values according to the Stefan-Boltzmann law. A very high correlation (R²>0.999) is found. Comparing histogram distributions of errors shows that uncertainties associated with the mean standard L (peak at ≈2.5 per cent) are much smaller than the uncertainties of L (peak at ≈8 per cent) by the Stefan-Boltzmann law. Increasing the number of filters used in predicting the mean M_bol increases the accuracy of the standard stellar luminosity. Extinction law, color-color relations and color excess vs. color excess relations for Gaia passbands are presented for the first time for main-sequence stars.

Słowa kluczowe

EN

stars: fundamental parameters; binaries: eclipsing; Sun: general

• Wydawca: Copernicus Foundation for Polish Astronomy
• Czasopismo: Acta Astronomica
• Rocznik: 2022
• Tom: Vol. 72, No. 3
• Strony: 195--232
• Opis fizyczny: Bibliogr. 42 poz., tab., wykr.

Twórcy

autor

Bakış V.

• Department of Space Sciences and Technologies, Faculty of Sciences, Akdeniz University, Antalya, TR

autor

Eker Z.

• Department of Space Sciences and Technologies, Faculty of Sciences, Akdeniz University, Antalya, TR

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