In: Contributions of the Astronomical Observatory Skalnaté Pleso, vol. 47, no. 1
I.m. Volkov - D. Chochol - J. Grygar - M. Mašek - J. Juryšek
Detaily:
Rok, strany: 2017, 29 - 52
Kľúčové slová:
stars: binaries: eclipsing, stars: binaries (including multiple): close, stars: mass-loss, stars: fundamental parameters
URL originálneho zdroja: http://www.astro.sk/caosp/Eedition/Abstracts/2017/Vol_47/No_1/pp29-52_abstract.html
O článku:
We aim to determine the absolute parameters of the components of southern
Algol-type binaries with deep eclipses RW CrA, DX Vel, V0646 Cen and
interpret their orbital period changes. The data analysis is based on a
high quality Walraven photoelectric photometry, obtained in the 1960-70s,
our recent CCD photometry,
ASAS (Pojmanski, 2002), and Hipparcos (Perryman et al., 1997) photometry
of the objects. Their light
curves were analyzed using the PHOEBE program with fixed effective
temperatures of the primary components, found from disentangling
the Walraven (B-U) and (V-B) colour indices. We found the
absolute parameters of the components of all three objects. All
reliable observed times of minimum light were used to construct
and analyze the Eclipse Time Variation (ETV) diagrams. We
interpreted the ETV diagrams of the detached binary RW CrA and
the semi-detached binary DX Vel by a LIght-Time Effect (LITE),
estimated parameters of their orbits and masses of
their third bodies. We suggest a long term variation of the
inclination angle of both eclipsing binaries, caused by a
non-coplanar orientation of their third body orbits. We
interpreted the detected orbital period increase in the
semi-detached binary V0646 Cen by a mass transfer from the less to
more massive component with the rate Ṁ = 6.08×10-9 M☉/yr.
Ako citovať:
ISO 690:
Volkov, I., Chochol, D., Grygar, J., Mašek, M., Juryšek, J. 2017. Orbital period changes in RW CrA, DX Vel and V0646 Cen. In Contributions of the Astronomical Observatory Skalnaté Pleso, vol. 47, no.1, pp. 29-52. 1335-1842.
APA:
Volkov, I., Chochol, D., Grygar, J., Mašek, M., Juryšek, J. (2017). Orbital period changes in RW CrA, DX Vel and V0646 Cen. Contributions of the Astronomical Observatory Skalnaté Pleso, 47(1), 29-52. 1335-1842.