J/other/CoSka/38.538 Radial velocities of TX UMa (Komzik+, 2008)
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 2008CoSka..38..538K
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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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 78 42 A list of spectrograms taken during the primary
eclipse of TX UMa, their radial velocities, excesses
of radial velocities and computed rotational factors
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See also:
J/MNRAS/415/2238 : Abundances of TX UMa (Glazunova+, 2011)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- Plate Plate designation (1)
9 A1 --- n_Plate [*] * for not used
11- 20 A10 "YYYY/MM/DD" Obs.date UT observation date
22- 26 A5 "h:m" Obs.time UT observation date
28- 39 F12.4 d HJD Heliocentric Julian date
41- 46 F6.4 --- Phase Phase
48- 50 I3 min Exp Exposure time
52- 53 I2 --- o_RV Number of spectral lines used to determine
the radial velocity
55- 59 F5.1 km/s RV Radial velocity
61- 63 F3.1 km/s e_RV rms uncertainty on RV
65- 69 F5.1 km/s RV' Radial velocity excess due to the
rotational effect
71- 78 F8.5 --- F Computed rotational factor
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Note (1): Plate origin:
DAO = Dominion Astrophysical Observatory
OND = Ondrejov
LWR, LWP = IUE satellite, low dispersion
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 16-Mar-2012