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V379 Cep: A Quadruple System of Two Binaries (CROSBI ID 590156)

Prilog sa skupa u časopisu | sažetak izlaganja sa skupa | međunarodna recenzija

Harmanec, P. ; Mayer, P. ; Božić, Hrvoje ; Eenens, P. ; Guinan, E. F. ; McCook, G. ; Koubsky, P. ; Ruždjak, Domagoj ; Sudar, Davor ; Slechta, M. et al. V379 Cep: A Quadruple System of Two Binaries // Proceedings of the International Astronomical Union / Hartkopf, W. I. ; Guinan, E. F. ; Harmanec, P. (ur.). 2007. str. 64-64

Podaci o odgovornosti

Harmanec, P. ; Mayer, P. ; Božić, Hrvoje ; Eenens, P. ; Guinan, E. F. ; McCook, G. ; Koubsky, P. ; Ruždjak, Domagoj ; Sudar, Davor ; Slechta, M. ; Wolf, M. ; Yang, S.

engleski

V379 Cep: A Quadruple System of Two Binaries

Based on several published photometric and spectroscopic studies, V379~Cep (HR~7940) was identified as a 99.76 day eclipsing binary composed of two unusually-low-mass B type stars with projected rotational velocities of 15 and 55 km/s. Our investigation of new series of spectra and UBV observations from several observatories shows that the object is actually a quadruple system: the two observed sets of spectral lines belong to two primaries of two different binaries. The narrower lines belong to component Aa with 99.76 day orbital period while the broader ones belong to component Ba with 159.3 day period. Both binaries revolve around a common centre of gravity with a period of about 6200 days ; this motion is measurable via the change of the systemic velocities of both binaries. Our result resolves the problem of anomalous masses. It is probable that the masses of all four bodies are quite normal for somewhat evolved stars. But the ultimate test must come from interferometric resolution of the AB pair of binaries ; it might be expected that the separation can reach about 40 mas. There is a very good chance that the continuing systematic observations will permit accurate determination of all four individual masses.

binaries; V379 Cep

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Podaci o prilogu

64-64.

2007.

nije evidentirano

objavljeno

Podaci o matičnoj publikaciji

Proceedings of the International Astronomical Union

Hartkopf, W. I. ; Guinan, E. F. ; Harmanec, P.

Cambridge: Cambridge University Press

1743-9213

Podaci o skupu

Nepoznat skup

poster

29.02.1904-29.02.2096

Povezanost rada

Fizika

Indeksiranost