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: http://star.arm.ac.uk/highlights/2014/651.html
Дата изменения: Thu May 1 12:41:01 2014 Дата индексирования: Sun Apr 10 02:58:04 2016 Кодировка: Поисковые слова: arp 220 |
K2 observations of the pulsating subdwarf B star EQ Piscium: an sdB+dM binary
Figure 3. The adopted fit to the K2 light curve for EQ Psc shown in Fig. 1. Black dots are the K2 observations. The solid red curve shows the solution represented in Table 1.
Abstract
K2, the two-wheel mission of the Kepler space telescope, observed the pulsating subdwarf B star EQ PSc during engineering tests in 2014 February. In addition to a rich spectrum of g-mode pulsation frequencies, the observations demonstrate a light variation with a period of 19.2 h and a full amplitude of 2%. We suggest that this is due to reflection from a cool companion, making EQPsc the longest-period member of some 30 binaries comprising a hot subdwarf and a cool dwarf companion (sdB+dM), and hence useful for exploring the common-envelope ejection mechanism in low-mass binaries.
Last Revised: 2014 May 1st |