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Spectroscopy of HD 86222 – a quintuple system with an eclipsing component

Dimitrov, W., Fagas, M., Kamiński, K., Kolev, D., Kwiatkowski, T., Bąkowska, K., Rożek, A., Bartczak, P., Borczyk, W., Schwarzenberg-Czerny, A. and others. (2014) Spectroscopy of HD 86222 – a quintuple system with an eclipsing component. Astronomy & Astrophysics, 564 . ISSN 0004-6361. (doi:10.1051/0004-6361/201321280)

Abstract

We present spectroscopic and photometric analysis of the quintuple star HD 86222 with an eclipsing component. Until now three visual components A, B, and C of this multiple star were known. Four components in the A/B pair were detected during the examination of the cross correlation functions obtained from the spectra. We noticed that the visual components A and B, separated by , are in fact two binary stars – one eclipsing pair and one spectroscopic system. The pair with higher radial velocity amplitude corresponds to the eclipsing period. Photometric and spectroscopic observations of the eclipsing binary enable us to obtain the Wilson-Devinney model. The masses of this pair are M1 = 1.29 ± 0.09 M⊙ and M2 = 1.33 ± 0.09 M⊙, respectively. The radii, slightly higher than for the main sequence stars, are R1 = 1.35 ± 0.01 R⊙ and R2 = 1.36 ± 0.01 R⊙, respectively. The main parameters of the spectroscopic binary are also estimated, but they must be confirmed by future observations because of the uncertainty of the period. The farthest star named C, is 15 arc seconds from the main A and B components. Assuming that this object is gravitationally connected with the A and B binary pairs, HD 86222 has at least five components.

Item Type: Article
DOI/Identification number: 10.1051/0004-6361/201321280
Uncontrolled keywords: binaries: close / binaries: eclipsing / stars: individual: HD 86222
Subjects: Q Science > QB Astronomy
Divisions: Faculties > Sciences > School of Physical Sciences > Centre for Astrophysics and Planetary Sciences
Depositing User: Agata Makiela
Date Deposited: 14 Mar 2019 10:47 UTC
Last Modified: 03 Jun 2019 09:33 UTC
Resource URI: https://kar.kent.ac.uk/id/eprint/72972 (The current URI for this page, for reference purposes)
Rożek, A.: https://orcid.org/0000-0003-2341-2238
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