J/AJ/164/224 Radial velocities for 3 spectroscopic binaries (Fekel+, 2022)
An Analysis of the Eclipsing Binaries HD 71636, V1022 Cassiopeiae, and OT
Andromedae.
Fekel F.C., Henry G.W., Sowell J.R., Partington E.R., Wedemeyer J.M.,
Nakum A.
<Astron. J., 164, 224 (2022)>
=2022AJ....164..224F 2022AJ....164..224F
ADC_Keywords: Binaries, spectroscopic; Binaries, eclipsing; Spectra, optical;
Photometry, UBV; Radial velocities
Keywords: Spectroscopic binary stars ; Fundamental parameters of stars ;
Eclipsing binary stars ; Detached binary stars
Abstract:
We have obtained high-dispersion spectroscopy and BV photometry of two
F-type eclipsing binaries, HD71636 and V1022Cas, plus the A-type
system OTAnd. Transiting Exoplanet Survey Satellite measurements for
each system have also been incorporated. The photometry of HD71636
enables a more consistent picture of this 5.01331days, circular-orbit
system to emerge. The F2 V primary has a mass of 1.506±0.002M☉
and a radius of 1.583±0.024R☉. The mass of the F5 V secondary
is 1.282±0.002M☉, and its radius is 1.314±0.030R☉.
Comparison with evolutionary models of the Modules for Experiments in
Stellar Astrophysics (MESA) series results in a good fit for a
composition of [Fe/H]=0.12 and an age of 0.9Gyr. For the F6 V stars of
V1022Cas, our analysis produces a period of 12.15616days and an
eccentricity of 0.312. The two components have nearly equal masses of
1.626±0.001M☉ and 1.607±0.001M☉. The radii of the
primary and secondary are 2.570±0.021R☉ and
2.445±0.022R☉, respectively. Comparison with the MESA
evolutionary models results in [Fe/H]=0.08 and an age of 1.87Gyr.
OTAnd consists of a pair of similar mid-A stars that have an orbital
period of 20.85292days and an eccentricity of 0.215. The primary has a
mass of 2.253±0.014M☉ and a radius of 3.167±0.013R☉.
The corresponding parameters for the secondary are
2.147±0.011M☉ and 2.649±0.015R☉, respectively. The
MESA series models produce a best fit for this system with [Fe/H]=0.10
and an age of 0.675Gyr. The total apsidal motion in both eccentric
systems is less than 1.5°/century.
Description:
We have acquired double-lined spectra of HD71636 from 2015 October to
2019 March at Fairborn Observatory in southeast Arizona. We obtained
the spectra with the Tennessee State University 2m Automatic
Spectroscopic Telescope (AST) and a fiber-fed echelle spectrograph.
The detector was a Fairchild 486 CCD that has a 4x4K array of 15µm
pixels. The size of the array results in a wavelength coverage that
ranges from 3800 to 8260Å. The spectra have a resolution of
0.24Å, corresponding to a resolving power of 25000 at 6000Å. The
best spectra have signal-to-noise ratios (S/Ns) of about 70.
We acquired double-lined spectroscopic observations of V1022Cas, from
2010 June to 2020 January, at Fairborn Observatory. We used the
Tennessee State University 2m AST and its associated fiber-fed echelle
spectrograph. The spectra of V1022 Cas have a resolution of 0.24Å,
corresponding to a resolving power of 25000 at 6000Å. The best
spectra have a S/N of about 125.
From 2004 September to 2021 May, we acquired 57 useful observations of
OTAnd with our Tennessee State University 2m AST and its associated
fiber-fed echelle spectrograph. The detector for the first three
observations was our original SITe CCD, while the Fairchild CCD was
used to collect the rest of our spectra. The spectra with the SITe CCD
have a resolution of 0.17Å, corresponding to a resolving power of
35000. The spectra with the new Fairchild CCD have a resolution of
0.4Å and a resolving power of 15000. The best spectra have a S/N of
150.
Objects:
-------------------------------------------------------------------------
RA (2000) DE Designation(s) (Period)
-------------------------------------------------------------------------
08 29 56.31 +37 04 15.4 HD 71636 = TIC 307844756 (P=5.01331d)
23 57 08.47 +55 42 20.5 V1022 Cassopeiae = TIC 65628544 (P=12.15616d)
23 20 01.21 +41 45 17.4 OT And = V* OT And (P=20.85292d)
-------------------------------------------------------------------------
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 59 70 Radial velocity observations of HD 71636
table2.dat 59 189 Radial velocity observations of V1022 Cas
table3.dat 59 57 Radial velocity observations of OT And
table7.dat 35 775 Photometric observations of HD 71636
table8.dat 35 1476 Photometric observations of V1022 Cas
table9.dat 35 3495 Photometric observations of OT And
--------------------------------------------------------------------------------
See also:
I/259 : The Tycho-2 Catalogue (Hog+ 2000)
V/64 : Eighth Orbital Elements of Spectroscopic Binaries (Batten+ 1989)
V/117 : Geneva-Copenhagen Survey of Solar neighbourhood (Holmberg+, 2007)
J/AJ/106/2096 : Limb-darkening coefficients in binaries (Van Hamme 1993)
J/ApJ/469/355 : Teff, B-V and BC relation (Flower, 1996)
J/AJ/129/2815 : Eleven new γ Doradus variables (Henry+, 2005)
J/AJ/132/2489 : Light curves of HD 71636 in B and V (Henry+, 2006)
J/A+A/450/735 : Effective temperatures and radii of stars (Masana+, 2006)
J/other/IBVS/5863 : 79th Name-List of Variable Stars (Kazarovets+, 2008)
J/ApJS/180/117 : MK classifications of spectroscopic binaries (Abt, 2009)
J/A+A/516/A42 : Spectral lines of BK Peg and BW Aqr (Clausen+, 2010)
J/other/A+ARV/18.67 : Accurate masses and radii of normal stars (Torres+, 2010)
J/ApJ/723/1469 : Flux calibrations and WZ Oph photometry (Wilson+, 2010)
J/A+A/530/A138 : Geneva-Copenhagen survey re-analysis (Casagrande+, 2011)
J/AJ/143/129 : Photometric and Spectroscopic obs. of BF Dra (Lacy+, 2012)
J/AJ/145/111 : Radial velocities of 5 spectroscopic binaries (Fekel+, 2013)
J/A+A/580/A23 : Stroemgren-Crawford uvbyβ photometry (Paunzen, 2015)
J/MNRAS/479/5491 : Absolute parameters of 509 main-sequence stars (Eker+, 2018)
Byte-by-byte Description of file: table[123].dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 11 F11.4 d HJD Heliocentric Julian date; JD-2400000
14- 18 F5.3 --- Phase Fractional phase
21- 25 F5.1 km/s RVel1 Radial velocity of primary
27- 30 F4.1 km/s (O-C)1 Velocity residual of primary
33- 35 F3.1 --- Weight1 Weight of primary velocity
38- 42 F5.1 km/s RVel2 Radial velocity of secondary
45- 48 F4.1 km/s (O-C)2 Velocity residual of secondary
51- 53 F3.1 --- Weight2 Weight of secondary velocity
56- 59 A4 --- ObsID Observatory source (1)
--------------------------------------------------------------------------------
Note (1): Observatories as follows:
KPNO = Kitt Peak National Observatory
Fair = Fairborn Observatory
McD = McDonald Observatory
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table[789].dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 11 F11.4 d HJD Heliocentric Julian date; JD-2400000
14- 19 F6.4 --- Phase Fractional phase
22- 27 F6.3 mag DVmag ? Delta V magnitude
30- 35 F6.3 mag DBmag ? Delta B magnitude
--------------------------------------------------------------------------------
History:
From electronic version of the journal
(End) Prepared by [AAS], Coralie Fix [CDS], 07-Dec-2022