HD 66051, an eclipsing binary hosting a highly peculiar, HgMn-related star
Abstract HD 66051 is an eclipsing system with an orbital period of about 4.75 d that exhibits out-of-eclipse variability with the same period. New multicolour photometric observations confirm the longevity of the secondary variations, which we interpret as a signature of surface inhomogeneities on o...
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2017
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oai:doaj.org-article:667dc2bbee254db383324e8ea05d2b722021-12-02T15:05:57ZHD 66051, an eclipsing binary hosting a highly peculiar, HgMn-related star10.1038/s41598-017-05987-62045-2322https://doaj.org/article/667dc2bbee254db383324e8ea05d2b722017-07-01T00:00:00Zhttps://doi.org/10.1038/s41598-017-05987-6https://doaj.org/toc/2045-2322Abstract HD 66051 is an eclipsing system with an orbital period of about 4.75 d that exhibits out-of-eclipse variability with the same period. New multicolour photometric observations confirm the longevity of the secondary variations, which we interpret as a signature of surface inhomogeneities on one of the components. Using archival and newly acquired high-resolution spectra, we have performed a detailed abundance analysis. The primary component is a slowly rotating late B-type star (T eff = 12500 ± 200 K; log g = 4.0, v sin i = 27 ± 2 km s−1) with a highly peculiar composition reminiscent of the singular HgMn-related star HD 65949, which seems to be its closest analogue. Some light elements as He, C, Mg, Al are depleted, while Si and P are enhanced. Except for Ni, all the iron-group elements, as well as most of the heavy elements, and in particular the REE elements, are overabundant. The secondary component was estimated to be a slowly rotating A-type star (T eff ~ 8000 K; log g = 4.0, v sin i ~ 18 km s−1). The unique configuration of HD 66051 opens up intriguing possibilities for future research, which might eventually and significantly contribute to the understanding of such diverse phenomena as atmospheric structure, mass transfer, magnetic fields, photometric variability and the origin of chemical anomalies observed in HgMn stars and related objects.Ewa NiemczuraStefan HümmerichFiorella CastelliErnst PaunzenKlaus BernhardFranz-Josef HambschKrzysztof HełminiakNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 7, Iss 1, Pp 1-11 (2017) |
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Medicine R Science Q Ewa Niemczura Stefan Hümmerich Fiorella Castelli Ernst Paunzen Klaus Bernhard Franz-Josef Hambsch Krzysztof Hełminiak HD 66051, an eclipsing binary hosting a highly peculiar, HgMn-related star |
| description |
Abstract HD 66051 is an eclipsing system with an orbital period of about 4.75 d that exhibits out-of-eclipse variability with the same period. New multicolour photometric observations confirm the longevity of the secondary variations, which we interpret as a signature of surface inhomogeneities on one of the components. Using archival and newly acquired high-resolution spectra, we have performed a detailed abundance analysis. The primary component is a slowly rotating late B-type star (T eff = 12500 ± 200 K; log g = 4.0, v sin i = 27 ± 2 km s−1) with a highly peculiar composition reminiscent of the singular HgMn-related star HD 65949, which seems to be its closest analogue. Some light elements as He, C, Mg, Al are depleted, while Si and P are enhanced. Except for Ni, all the iron-group elements, as well as most of the heavy elements, and in particular the REE elements, are overabundant. The secondary component was estimated to be a slowly rotating A-type star (T eff ~ 8000 K; log g = 4.0, v sin i ~ 18 km s−1). The unique configuration of HD 66051 opens up intriguing possibilities for future research, which might eventually and significantly contribute to the understanding of such diverse phenomena as atmospheric structure, mass transfer, magnetic fields, photometric variability and the origin of chemical anomalies observed in HgMn stars and related objects. |
| format |
article |
| author |
Ewa Niemczura Stefan Hümmerich Fiorella Castelli Ernst Paunzen Klaus Bernhard Franz-Josef Hambsch Krzysztof Hełminiak |
| author_facet |
Ewa Niemczura Stefan Hümmerich Fiorella Castelli Ernst Paunzen Klaus Bernhard Franz-Josef Hambsch Krzysztof Hełminiak |
| author_sort |
Ewa Niemczura |
| title |
HD 66051, an eclipsing binary hosting a highly peculiar, HgMn-related star |
| title_short |
HD 66051, an eclipsing binary hosting a highly peculiar, HgMn-related star |
| title_full |
HD 66051, an eclipsing binary hosting a highly peculiar, HgMn-related star |
| title_fullStr |
HD 66051, an eclipsing binary hosting a highly peculiar, HgMn-related star |
| title_full_unstemmed |
HD 66051, an eclipsing binary hosting a highly peculiar, HgMn-related star |
| title_sort |
hd 66051, an eclipsing binary hosting a highly peculiar, hgmn-related star |
| publisher |
Nature Portfolio |
| publishDate |
2017 |
| url |
https://doaj.org/article/667dc2bbee254db383324e8ea05d2b72 |
| work_keys_str_mv |
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