J/A+A/680/A89 V1344 Aql orbit parameters and spectra (Cseh+, 2023)
Orbit determination for the binary Cepheid V1344 Aql.
Cseh B., Csornyei G., Szabados L., Csak B., Kovacs J., Kriskovics L., Pal A.
<Astron. Astrophys. 680, A89 (2023)>
=2023A&A...680A..89C 2023A&A...680A..89C (SIMBAD/NED BibCode)
ADC_Keywords: Binaries, orbits ; Stars, variable ; Radial velocities ;
Spectra, optical
Keywords: stars: variables: Cepheids - stars: individual: V1344 Aql -
binaries: spectroscopic
Abstract:
Binary Cepheids play an important role in investigating the
calibration of the classical Cepheid period-luminosity relationship.
Therefore a thorough study of individual Cepheids belonging to binary
systems is necessary.
Our aim is to determine the orbit of the binary system V1344 Aql using
newly observed and earlier published spectroscopic and photometric
data.
We collected new radial velocity observations using medium resolution
(R∼11000 and R~<20000) spectrographs and we updated the pulsation
period of the Cepheid based on available photometric observations
using O-C diagram. Separating the pulsational and orbital radial
velocity variations for each observational season (year), we
determined the orbital solution for the system using chi2
minimisation.
The updated pulsation period of the Cepheid estimated for the epoch of
HJD 2458955.83 is 7.476826 days. We determined orbital elements for
the first time in the literature. The orbital period of the system is
about 34.6 years, with an eccentricity e=0.22.
Description:
New radial velocity (RV) data, gamma-velocities, derived orbital
parameters and O-C data used to calculate updated pulsation period for
the binary Cepheid V1344 Aql.
Objects:
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RA (2000) DE Designation(s)
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19 11 59.17 +04 21 17.4 V1344 Aql = HD 179315
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File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 22 28 New radial velocity data for V1344 Aql
table2.dat 23 9 Gamma-velocities for V1344 Aql
table3.dat 77 1 New orbital parameters for V1344 Aql
tablea1.dat 35 48 Obtained O-C values along with the source data
references
list.dat 158 28 List of fits spectra
fits/* . 28 Indivdual fits spectra
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Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 12 F12.4 d BJD Baricentric Julian Date
15- 18 F4.1 km/s RV Radial velocity
20- 22 F3.1 km/s e_RV Uncertainty in radial velocity
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Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 7 I7 d BJD Baricentric Julian Date
9- 13 F5.2 km/s vgamma Gamma-velocity
15- 18 F4.2 km/s e_vgamma Gamma-velocity uncertainty
20- 21 I2 --- NRV Number of radial velocity data points
23 I1 --- Ref Source of data (1)
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Note (1): References as follows:
1 = Balona (1981Obs...101..205B 1981Obs...101..205B)
2 = Arellano Ferro (1984MNRAS.209..481A 1984MNRAS.209..481A)
3 = present paper
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 4 I4 10+6km asini Projected length of the semi-major axis
6- 7 I2 10+6km e_asini Uncertainty in a*sin(i)
9- 12 F4.2 --- e Eccentricity
14- 17 F4.2 --- e_e Uncertainty in eccentricity
19- 22 F4.2 rad omega Argument of periastron
24- 27 F4.2 rad e_omega Uncertainty in argument of periastron
29- 35 I7 d T0 Time of periastron passage
37- 38 I2 d e_T0 Uncertainty in time of periastron passage
40- 44 I5 d Porb Orbital period
46- 47 I2 d e_Porb Uncertainty in orbital period
49- 52 F4.1 km/s v0 Systemic velocity
54- 57 F4.2 km/s e_v0 Uncertainty in systemic velocity
59- 62 F4.2 km/s K Semi-amplitude
64- 67 F4.2 km/s e_K Uncertainty in semi-amplitude
69- 72 F4.2 Msun f(m) Mass function
74- 77 F4.2 Msun e_f(m) Uncertainty in mass function
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Byte-by-byte Description of file: tablea1.dat
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Bytes Format Units Label Explanations
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1- 12 F12.4 d HJD Heliocentric Julian Date
14- 20 F7.1 --- Epoch Epoch
22- 27 F6.3 d O-Cmed Median O-C value
29- 33 F5.3 d e_O-Cmed Uncertainty in O-C
35 I1 --- Ref Reference (1)
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Note (1): Refernces as follows:
1 = Kovacs & Szabados (1979IBVS.1719....1K 1979IBVS.1719....1K)
2 = Szabados (1991CoKon..96..123S 1991CoKon..96..123S)
3 = Arellano Ferro (1984MNRAS.209..481A 1984MNRAS.209..481A)
4 = Eggen (1985AJ.....90.1297E 1985AJ.....90.1297E)
5 = Fernie & Garrison (1981PASP...93..330F 1981PASP...93..330F)
6 = Berdnikov (2008yCat.2285....0B 2008yCat.2285....0B)
7 = ASAS, Pojmanski (2001ASPC..246...53P 2001ASPC..246...53P, Cat. II/285)
8 = IOMC, Winkler et al. (2003A&A...411L...1W 2003A&A...411L...1W)
9 = KWS, Morokuma et al. (2014PASJ...66..114M 2014PASJ...66..114M)
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Byte-by-byte Description of file: list.dat
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Bytes Format Units Label Explanations
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1- 2 I2 h RAh Simbad right ascension (J2000)
4- 5 I2 min RAm Simbad right ascension (J2000)
7- 11 F5.2 s RAs Simbad right ascension (J2000)
12 A1 --- DE- Simbad declination sign (J2000)
13- 14 I2 deg DEd Simbad declination sign (J2000)
16- 17 I2 arcmin DEm Simbad declination sign (J2000)
19- 22 F4.1 arcsec DEs Simbad declination sign (J2000)
24- 28 I5 --- Nx Number of pixels along X-axis
30- 53 A24 "datime" Obs.date Observation date
55- 61 F7.2 0.1nm blambda Lower value of wavelength interval
63- 69 F7.2 0.1nm Blambda Upper value of wavelength interval
71- 79 F9.7 0.1nm dlambda Wavelength resolution
81- 83 I3 Kibyte size Size of FITS file
85-128 A44 --- FileName Name of FITS file, in subdirectory fits
130-158 A29 --- Title Title of the FITS file
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Acknowledgements:
Borbala Cseh, cseh.borbala(at)csfk.org
(End) Patricia Vannier [CDS] 23-Oct-2023