J/MNRAS/394/1695 Orbits of β Ret and ν Oct (Ramm+, 2009)
Spectroscopic orbits for K giants β Reticuli and ν Octantis: what is
causing a low-amplitude radial velocity resonant perturbation in ν Oct?
Ramm D.J., Pourbaix D., Hearnshaw J.B., Komonjinda S.
<Mon. Not. R. Astron. Soc., 394, 1695-1710 (2009)>
=2009MNRAS.394.1695R 2009MNRAS.394.1695R
ADC_Keywords: Binaries, spectroscopic ; Planets ; Radial velocities
Keywords: techniques: radial velocities - binaries: spectroscopic -
stars: individual: beta Reticuli, nu Octantis - planetary systems
Abstract:
New astrometric-spectroscopic orbital solutions for the single-line
K-giant binaries beta Reticuli (P∼5.2yr, e=0.3346±0.0004) and nu
Octantis (P∼2.9yr, e=0.2358±0.0003) have been derived based on
high-precision spectroscopic radial velocities (RVs) and the Hipparcos
astrometry.
Description:
The echelle spectra of beta Ret and nu Oct that formed the basis of
this work were obtained at Mt John University Observatory (MJUO), Lake
Tekapo, New Zealand, between 2001 July and 2007 February. The
observations used the 1-m McLellan telescope and the fibre-fed High
Efficiency and Resolution Canterbury University Large Echelle
Spectrograph (HERCULES).
Objects:
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RA (2000) DE Designation(s) (files)
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03 44 12.0 -64 48 25 beta Ret = HD 23817 (table4.dat)
21 41 28.6 -77 23 24 nu Oct = HD 205478 (table5.dat)
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table4.dat 27 155 Dates, weighted mean relative RVs and the
corresponding errors from 154 MJUO observations
of beta Ret
table5.dat 27 223 Dates, weighted mean relative RVs and the
corresponding errors from 222 MJUO observations
of nu Oct
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Byte-by-byte Description of file: table4.dat table5.dat
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Bytes Format Units Label Explanations
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1- 13 F13.5 d JD Julian date
15- 21 F7.3 km/s Vel Mean relative velocity
23- 26 F4.1 m/s e_Vel rms uncertainty on Vel
27 A1 --- n_Vel [*+)] Note (1)
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Note (1): Flags as follows:
* = velocities assessed to be outliers and excluded from the final
orbital solution
) = combined data
+ = resulting of combined data marked with ')'
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 19-Oct-2010