J/A+A/622/A164 Radial velocity curves of 11 Cepheids (Gallenne+, 2019)
Multiplicity of Galactic Cepheids from long-baseline interferometry.
IV. New detected companions from MIRC and PIONIER observations.
Gallenne A., Kervella P., Borgniet S., Merand A., Pietrzynski G., Gieren W.,
Monnier J.D., Schaefer G.H., Evans N.R., Anderson R.I., Baron F.,
Roettenbacher R.M., Karczmarek P.
<Astron. Astrophys. 622, A164 (2019)>
=2019A&A...622A.164G 2019A&A...622A.164G (SIMBAD/NED BibCode)
ADC_Keywords: Stars, variable ; Radial velocities
Keywords: techniques: interferometric - techniques: high angular resolution -
stars: variables: Cepheids - binaries: close -
Abstract:
We present the results of the study of Galactic binary Cepheids
combining interferometric and spectroscopic observations. For this
purpose, we performed new spectroscopic observations to obtain
high-precision radial velocity measurements of the Cepheids (primary
component of the systems). We then fit the radial pulsation and
orbital velocities to obtain the orbital elements.
Description:
We collected several spectra from 2012 to 2017 with the fiber-fed
SOPHIE spectrograph, the CORALIE spectrograph, the HARPS spectrograph
and the HERMES spectrograph. These four instruments cover the visible
wavelength. Exposure times of a few minutes allowed a signal-to-noise
ratio >10 per pixel at 550nm. All data were reduced using the
dedicated instrument pipeline. Radial velocities were estimated using
the cross-correlation method. We created our own weighted binary mask
by selecting unblended lines from high-resolution synthetic spectra
covering the wavelength range 4500-6800 angstrom. The
cross-correlation function is then fitted by a Gaussian whose minimum
value gives an estimate of the RV. Uncertainties include photon noise
and internal drift.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
stars.dat 65 11 List of studied stars
tableb1.dat 36 58 Radial velocity of the Cepheid U Aql
tableb2.dat 36 86 Radial velocity of the Cepheid FF Aql
tableb3.dat 36 17 Radial velocity of the Cepheid YZ Car
tableb4.dat 36 32 Radial velocity of the Cepheid BP Cir
tableb5.dat 36 23 Radial velocity of the Cepheid BG Cru
tableb6.dat 36 34 Radial velocity of the Cepheid S Mus
tableb7.dat 36 37 Radial velocity of the Cepheid S Nor
tableb8.dat 36 38 Radial velocity of the Cepheid W Sgr
tableb9.dat 36 25 Radial velocity of the Cepheid V350 Sgr
tableb10.dat 36 26 Radial velocity of the Cepheid V636 Sco
tableb11.dat 36 26 Radial velocity of the Cepheid AH Vel
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See also:
J/A+A/579/A68 : CANDID code for interferometric observations (Gallenne+, 2015)
Byte-by-byte Description of file: stars.dat
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Bytes Format Units Label Explanations
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1- 8 A8 --- Name Cepheid name
11- 12 I2 h RAh Simbad right ascension (J2000)
14- 15 I2 min RAm Simbad right ascension (J2000)
17- 21 F5.2 s RAs Simbad right ascension (J2000)
23 A1 --- DE- Simbad declination sign (J2000)
24- 25 I2 deg DEd Simbad declination (J2000)
27- 28 I2 arcmin DEm Simbad declination (J2000)
30- 33 F4.1 arcsec DEs Simbad declination (J2000)
35- 43 F9.6 d Ppuls Pulsation period
45- 52 F8.6 d e_Ppuls rmd uncertainty on Ppuls
54- 65 A12 --- FileName Name of the table with velocity data
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Byte-by-byte Description of file: tableb*.dat
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Bytes Format Units Label Explanations
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1- 12 F12.6 d MJD Modified Julian day
16- 21 F6.2 km/s RV Radial velocity
25- 28 F4.2 km/s e_RV Uncertainty on the radial velocity
30- 36 A7 --- Inst Instrument used to measure the radial velocity
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Acknowledgements:
Alexandre Gallenne, agallenn(at)eso.org
References:
Gallenne et al., Paper I 2013A&A...552A..21G 2013A&A...552A..21G
Gallenne et al., Paper II 2014A&A...561L...3G 2014A&A...561L...3G
Gallenne et al., Paper III 2015A&A...579A..68G 2015A&A...579A..68G, Cat. J/A+A/579/A68
(End) Patricia Vannier [CDS] 11-Jan-2019