LONG-TERM PHOTOMETRIC AND SPECTROSCOPIC OBSERVATIONS OF THE NEAR-CONTACT BINARY KR CYGNI
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| Format: | Artículo científico |
| Sprache: | en |
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Universidad Nacional Autónoma de México
2013
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| _version_ | 1876433987924131840 |
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| author | E. Sipahi |
| author_facet | E. Sipahi |
| contents | LONG-TERM PHOTOMETRIC AND SPECTROSCOPIC OBSERVATIONS OF THE NEAR-CONTACT BINARY KR CYGNI E. Sipahi C. Ibanoĝlu Ö. Cakırlı Física, Astronomía y Matemáticas AKCMi DOCas) Binaries: close binaries: general binaries: eclipsing We present the multi-color, five-year light curves and the radial velocities of the near-contact binary system KR Cyg. We derived the masses of the components as 2.88 ± 0.20 M⊙ and 1.26 ± 0.07 M⊙ and the radii as 2.59 ± 0.06 R⊙ and 1.80 ± 0.04 R⊙. We also searched for the empirical determination of albedo and effective temperature of the cooler, less massive star of KRCyg, and of two similar near contact binaries AKCMi, and DOCas. The residuals between the observed and computed fluxes are attributed to the effect of mutual illumination which heats the surface layers of the illuminated star and does vary not only its bolometric albedo but also its limb-darkening coefficient and gravity-brightening exponent. The effective albedos are generally smaller than that expected from an envelope of convective star. These results are preliminary and speculative. 2013 artículo científico 0185-1101 https://www.redalyc.org/articulo.oa?id=57126152003 en http://www.redalyc.org/revista.oa?id=571 Revista Mexicana de Astronomía y Astrofísica application/pdf Universidad Nacional Autónoma de México Revista Mexicana de Astronomía y Astrofísica (México) Num.1 Vol.49 |
| format | Artículo científico |
| id | redalyc_57126152003 |
| institution | Redalyc |
| language | en |
| publishDate | 2013 |
| publisher | Universidad Nacional Autónoma de México |
| spellingShingle | LONG-TERM PHOTOMETRIC AND SPECTROSCOPIC OBSERVATIONS OF THE NEAR-CONTACT BINARY KR CYGNI E. Sipahi Física, Astronomía y Matemáticas AKCMi DOCas) Binaries: close binaries: general binaries: eclipsing LONG-TERM PHOTOMETRIC AND SPECTROSCOPIC OBSERVATIONS OF THE NEAR-CONTACT BINARY KR CYGNI E. Sipahi C. Ibanoĝlu Ö. Cakırlı Física, Astronomía y Matemáticas AKCMi DOCas) Binaries: close binaries: general binaries: eclipsing We present the multi-color, five-year light curves and the radial velocities of the near-contact binary system KR Cyg. We derived the masses of the components as 2.88 ± 0.20 M⊙ and 1.26 ± 0.07 M⊙ and the radii as 2.59 ± 0.06 R⊙ and 1.80 ± 0.04 R⊙. We also searched for the empirical determination of albedo and effective temperature of the cooler, less massive star of KRCyg, and of two similar near contact binaries AKCMi, and DOCas. The residuals between the observed and computed fluxes are attributed to the effect of mutual illumination which heats the surface layers of the illuminated star and does vary not only its bolometric albedo but also its limb-darkening coefficient and gravity-brightening exponent. The effective albedos are generally smaller than that expected from an envelope of convective star. These results are preliminary and speculative. 2013 artículo científico 0185-1101 https://www.redalyc.org/articulo.oa?id=57126152003 en http://www.redalyc.org/revista.oa?id=571 Revista Mexicana de Astronomía y Astrofísica application/pdf Universidad Nacional Autónoma de México Revista Mexicana de Astronomía y Astrofísica (México) Num.1 Vol.49 |
| title | LONG-TERM PHOTOMETRIC AND SPECTROSCOPIC OBSERVATIONS OF THE NEAR-CONTACT BINARY KR CYGNI |
| topic | Física, Astronomía y Matemáticas AKCMi DOCas) Binaries: close binaries: general binaries: eclipsing |
| url | https://www.redalyc.org/articulo.oa?id=57126152003 |