J/AJ/146/129 Orbits of 4 double-lined spectroscopic binaries (Fekel+, 2013)
New precision orbits of bright double-lined spectroscopic binaries.
VIII. HR 1528, HR 6993, 2 Sagittae, and 18 Vulpeculae.
Fekel F.C., Tomkin J., Williamson M.H.
<Astron. J., 146, 129 (2013)>
=2013AJ....146..129F 2013AJ....146..129F
ADC_Keywords: Binaries, spectroscopic ; Radial velocities
Keywords: binaries: spectroscopic - stars: fundamental parameters -
stars: individual (HR 1528,HR 6993,2 Sge,18 Vul)
Abstract:
Improved orbital elements for four A-star double-lined spectroscopic
binaries have been determined with numerous new radial velocities.
Three of the four systems, HR 1528, 2 Sge, and 18 Vul, have moderately
short orbital periods of 7.05, 7.39, and 9.31 days, respectively, and
also have circular or nearly circular orbits. Only HR 6993 with a
period of 14.68 days has a significantly eccentric orbit. The close
visual companion of 2 Sge has been detected spectroscopically, and its
velocity measured. The orbital dimensions (a1sini and a2sini)
and minimum masses (m1sin3i and m2 sin3i) of the
short-period binary components all have accuracies of 0.5% or better.
We determine basic properties of the individual stars and compare them
with solar-abundance evolutionary tracks to estimate their masses.
Half of the eight components may be synchronously or
pseudosynchronously rotating.
Description:
We acquired spectroscopic observations of the four program stars at
three different observatories.
From 2002 through 2007, we collected spectra at McDonald Observatory
with the 2.1m telescope, the Sandiford Cassegrain echelle
spectrograph, and a Reticon CCD. The wavelength range covered by those
spectrograms is 5700-7000Å and the resolving power is 49000.
From 2004 through 2012, we also obtained spectrograms of the binaries
at Kitt Peak National Observatory (KPNO) with the coude feed telescope
and coude spectrograph. The vast majority of the observations were
made with a Texas Instruments (TI) CCD detector. Those spectra are
mostly centered at 6430Å, cover a wavelength range of 84Å, and
have a resolution of 0.21Å or a resolving power of just over 30000.
Finally, from 2003 through 2013, we collected an extensive number of
spectra with the Tennessee State University 2m Automatic Spectroscopic
Telescope (AST) and a fiber-fed echelle spectrograph, situated at
Fairborn Observatory near Washington Camp in the Patagonia Mountains
of southeastern Arizona. Through 2011 June, the detector was a
2048*4096 SITe ST-002A CCD (the wavelength range was 4920-7100Å
with an average resolution of 0.17Å). In the summer of 2011 the
SITe CCD detector and dewar were replaced with a Fairchild 486 CCD
(wavelength range 3800-8260Å).
File Summary:
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FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 55 4 Basic properties of the program stars
table2.dat 58 110 Radial Velocities of HR 1528
table4.dat 58 119 Radial Velocities of HR 6993
table6.dat 58 125 Radial Velocities of 2 Sge
table8.dat 58 75 Radial Velocities of 18 Vul
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See also:
B/sb9 : 9th Catalogue of Spectroscopic Binary Orbits (Pourbaix+ 2004-2014)
I/311 : Hipparcos, the New Reduction (van Leeuwen, 2007)
I/239 : The Hipparcos and Tycho Catalogues (ESA 1997)
J/AJ/145/111 : Radial velocities of 5 spectroscopic binaries (Fekel+, 2013)
J/ApJ/695/1527 : HR 8257: orbit and basic properties (Fekel+, 2009)
J/AJ/117/1890 : Hipparcos binaries (Mason+, 1999)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 6 A6 --- Name Star name
8- 11 I4 --- HR HR number of the star
13- 18 I6 --- HD HD number of the star
20- 25 I6 --- HIP HIP number of the star (added at CDS)
27- 32 A6 --- SpT Spectral type
34- 37 F4.2 mag Vmag [5.51/6.27] V band magnitude (1)
39- 43 F5.3 mag B-V [0.067/0.25] The (B-V) color index (1)
45- 49 F5.2 mas Plx [6.23/11.94] Parallax (2)
51- 55 F5.2 d Per [7.05/14.68] Period
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Note (1): From Perryman et al. (1997, cat. I/239).
Note (2): From van Leeuwen (2007, cat. I/311).
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Byte-by-byte Description of file: table[2468].dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 9 F9.3 d HJD Heliocentric Julian Date (HJD-2400000)
11 A1 --- b [b] Blue wavelength spectrum
13- 17 F5.3 --- Phase [0/1] Phase
19- 23 F5.1 km/s RV1 Primary radial velocity
25- 28 F4.1 km/s O-C1 Primary (O-C) residual
30- 32 F3.1 --- w_RV1 [0.2/1] Primary weight
34- 38 F5.1 km/s RV2 Secondary radial velocity
40- 43 F4.1 km/s O-C2 Secondary (O-C) residual
45- 48 F4.2 --- w_RV2 [0.02/1] Secondary weight
50- 53 F4.1 km/s RV3 ? Third component radial velocity (1)
55- 58 A4 --- Obs Observatory (Fair, McD, KPNO) (2)
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Note (1): Only for the star '2 Sge' (Table 6).
Note (2): Observatory codes are defined as follows:
Fair = Fairborn Observatory;
McD = McDonald Observatory;
KPNO = Kitt Peak National Observatory.
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History:
From electronic version of the journal
References:
Tomkin & Fekel, Paper I, 2006AJ....131.2652T 2006AJ....131.2652T
Tomkin & Fekel, Paper II, 2008AJ....135..555T 2008AJ....135..555T
Fekel et al., Paper III, 2009AJ....137.3900F 2009AJ....137.3900F
Fekel et al., Paper IV, 2010AJ....139.1579F 2010AJ....139.1579F
Fekel et al., Paper V, 2010AJ....140.1381F 2010AJ....140.1381F
Fekel et al., Paper VI, 2011AJ....141..145F 2011AJ....141..145F
Fekel & Williamson, Paper VII, 2011AJ....142...69F 2011AJ....142...69F
Fekel et al., Paper IX, 2015AJ....149...63F 2015AJ....149...63F, cat. J/AJ/149/63
Fekel et al., Paper X, 2017AJ....154..120F 2017AJ....154..120F
(End) Sylvain Guehenneux [CDS] 31-Jul-2014