J/MNRAS/458/3272 Accurate SB2 radial velocities (Kiefer+, 2016)
Masses of the components of SB2 binaries observed with Gaia.
III. Accurate SB2 orbits for 10 binaries and masses of HIP 87895.
Kiefer F., Halbwachs J.-L., Arenou F., Pourbaix D., Famaey B., Guillout P.,
Lebreton Y., Nebot Gomez-Moran A., Mazeh T., Salomon J.-B., Soubiran C.,
Tal-Or L.
<Mon. Not. R. Astron. Soc., 458, 3272-3281 (2016)>
=2016MNRAS.458.3272K 2016MNRAS.458.3272K (SIMBAD/NED BibCode)
ADC_Keywords: Binaries, spectroscopic ; Radial velocities
Keywords: methods: observational - techniques: interferometric -
techniques: radial velocities - binaries: spectroscopic -
stars: fundamental parameters - stars: individual: HIP 87895
Abstract:
In anticipation of the Gaia astrometric mission, a large sample of
spectroscopic binaries has been observed since 2010 with the
Spectrographe pour l'Observation des PHenomenes des Interieurs
Stellaires et des Exoplanetes spectrograph at the Haute-Provence
Observatory. Our aim is to derive the orbital elements of double-lined
spectroscopic binaries (SB2s) with an accuracy sufficient to finally
obtain the masses of the components with relative errors as small as 1
per cent when the astrometric measurements of Gaia are taken into
account. In this paper, we present the results from five years of
observations of 10 SB2 systems with periods ranging from 37 to 881d.
Using the todmor algorithm, we computed radial velocities from the
spectra, and then derived the orbital elements of these binary
systems. The minimum masses of the components are then obtained with
an accuracy better than 1.2 per cent for the 10 binaries. Combining
the radial velocities with existing interferometric measurements, we
derived the masses of the primary and secondary components of HIP
87895 with an accuracy of 0.98 and 1.2 per cent, respectively.
Description:
The observations were performed at the T193 telescope of the
Haute-Provence Observatory, with the SOPHIE spectrograph. SOPHIE is
dedicated to the search of extrasolar planets, and, thanks to its high
resolution (R∼75000), it enables accurate stellar RVs to be
measured for SB2 components.
The RVs of the components are derived using the TwO-Dimensional
CORrelation algorithm todcor (Zucker & Mazeh 1994ApJ...420..806Z 1994ApJ...420..806Z;
Zucker et al. 2004, Cat. J/A+A/426/695).
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 39 10 10 SB2 analysed in this paper
table3.dat 77 123 New radial velocities from SOPHIE and obtained
with todmor
table4.dat 32 10 Correction terms applied to the uncertainties of
the new RV measurements
(Table4, Col. 1, 7-10)
--------------------------------------------------------------------------------
See also:
I/337 : Gaia DR1 (Gaia Collaboration, 2016)
J/A+A/498/627 : Radial velocities of SB with M giant (Famaey+, 2009)
Byte-by-byte Description of file: table1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1 A1 --- Note [P1] Note (1)
3- 8 I6 --- HIP HIP number
10- 15 I6 --- HD HD number
17- 20 F4.2 mag Vmag V magnitude
22- 27 F6.2 d Per Period (2)
29- 30 I2 --- Nsp Number of spectra collected with SOPHIE.
32- 35 F4.1 --- Tspan Total span of observation epochs,
counted in number of periods
37- 39 I3 --- SNR Median signal-to-noise ratio of each sample
--------------------------------------------------------------------------------
Note (1): Note as follows:
P = Previously published SB2
1 = SB2 identified in paper I, Halbwachs et al., 2014MNRAS.445.2371H 2014MNRAS.445.2371H,
previously published as SB1
Note (2): The period values are taken from the SB9 catalogue
(Pourbaix et al., 2004, Cat. B/sb9).
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table3.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 3 A3 --- --- [HIP]
5- 10 I6 --- HIP HIP number
12- 21 F10.4 d BJD Barycentric Julian date (BJD-2400000)
23- 30 F8.4 km/s RV1 Primary radial velocity
31 A1 --- n_RV1 [*] Note on RV1 (1)
33- 38 F6.4 km/s e_RV1 rms uncertainty on RV1
39 A1 --- neRV1 [*] Note on e_RV1 (1)
41- 49 F9.4 km/s RV2 Secondary radial velocity
50 A1 --- n_RV2 [*] Note on RV2 (1)
52- 57 F6.4 km/s e_RV2 rms uncertainty on RV2
58 A1 --- neRV2 [*] Note on e_RV2 (1)
61- 67 F7.4 km/s O1-C1 Observed minus computed for RV1
68 A1 --- n_O1-C1 [*] Note on O1-C1 (1)
70- 76 F7.4 km/s O2-C2 Observed minus computed for RV2
77 A1 --- n_O2-C2 [*] Note on O2-C2 (1)
--------------------------------------------------------------------------------
Note (1): * indicates outlier, not taken into account in the analysis.
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table4.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 6 I6 --- HIP HIP number
8- 13 F6.4 km/s eps1 Noise to be quadratically added to e_RV1
15- 19 F5.3 --- phi1 Correction coefficient; the final
uncertainty of RV1 is:
phi1*sqrt(e_RV12 + eps12)
21- 26 F6.4 km/s eps2 Noise to be quadratically added to e_RV2
28- 32 F5.3 --- phi2 Correction coefficient; the final
uncertainty of RV2 is:
phi2*sqrt(e_RV22 + eps22)
--------------------------------------------------------------------------------
History:
* 30-May-2017 : From electronic version of the journal
* 21-Dec-2017 : Table 4 added
References:
Halbwachs et al., Paper I 2014MNRAS.445.2371H 2014MNRAS.445.2371H
Halbwachs et al., Paper II 2016MNRAS.455.3303H 2016MNRAS.455.3303H
Kiefer et al., Paper IV 2018MNRAS.474..731K 2018MNRAS.474..731K, Cat. J/MNRAS/474/731
(End) Patricia Vannier [CDS] 17-Feb-2017