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J/other/CoSka/38.538 Radial velocities of TX UMa (Komzik+, 2008)
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Beginning of ReadMe :J/other/CoSka/38.538 Radial velocities of TX UMa (Komzik+, 2008)
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Asynchronous rotation of the mass gaining component in the Algol-type binary
TX UMa.
Komzik R., Chochol D., Grygar J.
<Contr. Astron. Obs. Skalnate Pleso, 38, 538-544 (2008)>
=2008CoSka..38..538K
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ADC_Keywords: Binaries, eclipsing
Keywords: stars: close binaries - rotational effect - asynchronous rotation -
TX UMa
Abstract:
High-dispersion spectrograms of the interacting close binary TX UMa
taken in 1969-73 around the primary minima were used to display the
rotational effect of the mass gaining component. The resulting
rotational velocity of the gainer is 70.8+/-2.9km/s. The magnitude of
the effect points to considerable over-synchronous rotation of the
gainer due to direct impact of the gas flow from the loser component
onto the surface of the gainer. Some aspects of the secular decrease
of the orbital period of the system relevant to this finding are
discussed, too.
Description:
Our spectroscopy of TXUMa consist of:
* 96 spectra taken by JG with the Cassegrain spectrograph of the 1.8m
telescope at the DAO Observatory in the period December 1969 - July 1970.
* 52 spectra taken by JG in 1972-80 and 7 spectra taken by RK in
1992-93 with the coude spectrograph of the 2.0m telescope at the
Ondrejov Observatory.
Objects:
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RA (2000) DE Designation(s)
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10 45 20.50 +45 33 58.8 TX UMa = HIP 52599
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