HD 66051, an eclipsing binary hosting a highly peculiar, HgMn-related star

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216224%3A14310%2F17%3A00099899" target="_blank" >RIV/00216224:14310/17:00099899 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1038/s41598-017-05987-6" target="_blank" >http://dx.doi.org/10.1038/s41598-017-05987-6</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1038/s41598-017-05987-6" target="_blank" >10.1038/s41598-017-05987-6</a>

Result language

angličtina

Original language name

HD 66051, an eclipsing binary hosting a highly peculiar, HgMn-related star

Original language description

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 similar to 8000 K; log g = 4.0, v sin i similar to 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.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10308 - Astronomy (including astrophysics,space science)

Project

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Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2017

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Scientific reports

ISSN

2045-2322

e-ISSN

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Volume of the periodical

7

Issue of the periodical within the volume

July

Country of publishing house

GB - UNITED KINGDOM

Number of pages

11

Pages from-to

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UT code for WoS article

000405895400003

EID of the result in the Scopus database

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