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J/MNRAS/430/2018   6 bright Galactic Cepheids data           (Szabados+, 2013)

Discovery of the spectroscopic binary nature of six southern Cepheids. Szabados L., Derekas A., Kiss L.L., Kovacs J., Anderson R.I., Kiss CS., Szalai T., Szekely P., Christiansen J.L. <Mon. Not. R. Astron. Soc., 430, 2018-2028 (2013)> =2013MNRAS.430.2018S (SIMBAD/NED BibCode)
ADC_Keywords: Stars, variable ; Binaries, spectroscopic ; Radial velocities Keywords: binaries: spectroscopic - stars: variables: Cepheids Abstract: We present the analysis of photometric and spectroscopic data of six bright Galactic Cepheids: GH Carinae, V419 Centauri, V898 Centauri, AD Puppis, AY Sagittarii and ST Velorum. Based on new radial velocity data (in some cases supplemented with earlier data available in the literature), these Cepheids have been found to be members in spectroscopic binary systems. V898 Cen turned out to have one of the largest orbital radial velocity amplitude (>40km/s) among the known binary Cepheids. The data are insufficient to determine the orbital periods nor other orbital elements for these new spectroscopic binaries. These discoveries corroborate the statement on the high frequency of occurrence of binaries among the classical Cepheids, a fact to be taken into account when calibrating the period-luminosity relationship for Cepheids. We have also compiled all available photometric data that revealed that the pulsation period of AD Pup, the longest period Cepheid in this sample, is continuously increasing with ΔP=0.004567d/century, likely to be caused by stellar evolution. The wave-like pattern superimposed on the parabolic O-C graph of AD Pup may well be caused by the light-time effect in the binary system. ST Vel also pulsates with a continuously increasing period. The other four Cepheids are characterized with stable pulsation periods in the last half century. Description: We performed a RV survey of Cepheids with the 2.3m ANU telescope located at Siding Spring Observatory (SSO), Australia. On 64 nights between 2004 October and 2006 March we monitored 40 Cepheids with pulsation periods between 2 and 30d. (V898 Cen was observed in 2009 July too). File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 69 6 Basic data of the programme stars and the number of spectra table3.dat 16 27 New RV values of GH Carinae from the SSO spectra table4.dat 16 43 New CORALIE velocities of GH Carinae table6.dat 16 26 New RV values of V419 Centauri from the SSO spectra table9.dat 16 33 New RV values of V898 Centauri from the SSO spectra table13.dat 16 33 New RV values of AD Puppis from the SSO spectra table15.dat 16 22 New RV values of AY Sagittarii from the SSO spectra table17.dat 16 27 New RV values of ST Velorum from the SSO spectra
Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 8 A8 --- Star Star name 10- 14 F5.2 mag <Vmag> Mean V magnitude 16- 24 F9.6 d Per Period 26- 39 A14 --- Mode Mode of pulsation 42- 46 A5 --- Nobs Number of observations 48- 58 A11 --- FileName1 Name of the table with radial velocities from SSO spectrum 60- 69 A10 --- FileName2 Name of the table with CORALIE radial velocities
Byte-by-byte Description of file: table[3469].dat table1[357].dat
Bytes Format Units Label Explanations
1- 10 F10.4 d HJD Heliocentric Julian date (HJD-2400000) 12- 16 F5.1 km/s RV Radial velocity
History: From electronic version of the journal
(End) Patricia Vannier [CDS] 31-Jun-2017
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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