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J/A+A/384/1030 Orientation of orbits in triple stars (Sterzik+, 2002)
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Relative orientation of orbits in triple stars.
Sterzik M.F., Tokovinin A.A.
<Astron. Astrophys. 384, 1030 (2002)>
=2002A&A...384.1030S (SIMBAD/NED BibCode)
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ADC_Keywords: Stars, double and multiple
Keywords: binaries: general - binaries: visual - stars: formation -
stellar dynamics
Description:
A sample of visual syb-systems from the Multiple Star Catalog
(Tokovinin, 1997, Cat. <J/A+AS/124/75>) is selected where the apparent
sense of rotation (prograde or retrograde) at two adjacent
hierarchical levels can be determined from observations. This sample
is used to compute the sign correlation which, in turn, is related to
the average angle between the orbital angular momentum vectors of
inner and outer sub-systems. It is shown that the vectors are weakly
correlated, and that the correlation decreases with increasing ratio
of outer to inner periods.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table4.dat 30 135 Identification, periods, rotation sense
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See also:
J/A+AS/124/75 : Multiple star catalogue (MSC) (Tokovinin 1997-1999)
Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- IDS IDS (1900) or MSC (<J/A+AS/124/75>) identifier
13- 16 F4.2 [d] LogPout Log10 of outer period
18- 19 I2 --- Rotout [-1,1] Apparent rotation in outer system (1)
22- 25 F4.2 [d] LogPin Log10 of inner period
27- 28 I2 --- Rotin [-1,1] Apparent rotation in inner system (1)
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Note (1): Apparent rotation 1 for prograde apparent rotation (increasing
position angles), -1 for retrograde rotation.
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Acknowledgements: Michael Sterzik <msterzik@eso.org>
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(End) Patricia Bauer [CDS] 15-Mar-2002