Unresolved Binaries and Multiples in the Intermediate Mass Range in Open Clusters: Pleiades, Alpha Per, Praesepe, and NGC 1039
Электронный научный архив УРФУ
Информация об архиве | Просмотр оригинала| Поле | Значение | |
| Заглавие |
Unresolved Binaries and Multiples in the Intermediate Mass Range in Open Clusters: Pleiades, Alpha Per, Praesepe, and NGC 1039
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| Автор |
Malofeeva, A. A.
Mikhnevich, V. O. Carraro, G. Seleznev, A. F. |
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| Тематика |
ELECTRONIC BAND STRUCTURE
GALVANOMAGNETIC EFFECTS HIGH-TC SUPERCONDUCTORS CRYSTAL SYMMETRY ELECTRONS GALVANOMAGNETIC EFFECTS HIGH TEMPERATURE SUPERCONDUCTORS HOLE MOBILITY MAGNETIC FIELDS SELENIUM COMPOUNDS TEMPERATURE ELECTRON HOLE SYMMETRY ELECTRONIC BAND STRUCTURE HIGH TC SUPERCONDUCTORS LOW TEMPERATURES MAGNETO TRANSPORT PROPERTIES NONLINEAR BEHAVIOR TEMPERATURE COEFFICIENT WIDE TEMPERATURE RANGES IRON COMPOUNDS |
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| Описание |
In this study, we continue our project to search for unresolved binary and multiple systems in open clusters exploiting the photometric diagram (H-W2)-W1 versus W2-(BP-K) first introduced in Malofeeva et al. In particular, here we estimate the binary and multiple star ratios and the distribution of the component mass ratio q in the Galactic clusters Alpha Persei, Praesepe, and NGC 1039. We have modified the procedure outlined in our first study making star counts automatic and by introducing bootstrapping for error estimation. Basing on this, we reinvestigated the Pleiades star cluster in the same mass range as in our previous work and corrected an inaccuracy in the mass ratio q distribution. The binary and multiple star ratio in the four clusters is then found to lie between 0.45 ± 0.03 and 0.73 ± 0.03. On the other hand, the ratio of systems with multiplicity more than 2 is between 0.06 ± 0.01 and 0.09 ± 0.02. The distribution of the component mass ratio q is well fitted with a Gaussian having the mode between 0.22 ± 0.04 and 0.52 ± 0.01 and the dispersion between 0.10 ± 0.02 and 0.35 ± 0.07. All clusters show a large number of the very low-mass secondary components in the binary systems with primary components below 0.5 M ⊙. © 2023. The Author(s). Published by the American Astronomical Society.
Ministry of Education and Science of the Russian Federation, Minobrnauka: FEUZ-2020-0030; Università degli Studi di Padova, UNIPD: BIRD191235/19 The work of A.F.S. was supported by the Ministry of Science and Higher Education of the Russian Federation, FEUZ-2020-0030. The work of G.C. has been supported by Padova University grant BIRD191235/19: Internal dynamics of Galactic star clusters in the Gaia era: binaries, blue stragglers, and their effect in estimating dynamical masses. |
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| Дата |
2024-04-05T16:30:33Z
2024-04-05T16:30:33Z 2023 |
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| Тип |
Article
Journal article (info:eu-repo/semantics/article) |info:eu-repo/semantics/publishedVersion |
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| Идентификатор |
Malofeeva, AA, Mikhnevich, VO, Carraro, G & Seleznev, AF 2023, 'Unresolved Binaries and Multiples in the Intermediate Mass Range in Open Clusters: Pleiades, Alpha Per, Praesepe, and NGC 1039', Astronomical Journal, Том. 165, № 2, 45. https://doi.org/10.3847/1538-3881/aca666
Malofeeva, A. A., Mikhnevich, V. O., Carraro, G., & Seleznev, A. F. (2023). Unresolved Binaries and Multiples in the Intermediate Mass Range in Open Clusters: Pleiades, Alpha Per, Praesepe, and NGC 1039. Astronomical Journal, 165(2), [45]. https://doi.org/10.3847/1538-3881/aca666 0004-6256 Final All Open Access, Gold, Green https://www.scopus.com/inward/record.uri?eid=2-s2.0-85146482836&doi=10.3847%2f1538-3881%2faca666&partnerID=40&md5=1d9127a7cbec6c2c1fb4417fb8a76c23 https://iopscience.iop.org/article/10.3847/1538-3881/aca666/pdf http://elar.urfu.ru/handle/10995/130692 10.3847/1538-3881/aca666 85146482836 000911338600001 |
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| Язык |
en
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| Права |
Open access (info:eu-repo/semantics/openAccess)
cc-by https://creativecommons.org/licenses/by/4.0/ |
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| Формат |
application/pdf
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| Издатель |
American Astronomical Society
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| Источник |
The Astronomical Journal
Astronomical Journal |
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