J/AJ/149/63 Radial velocities of HD 54371, HR 2692, and 16 UMa (Fekel+, 2015)
New precision orbits of bright double-lined spectroscopic binaries.
IX. HD 54371, HR 2692, and 16 Ursa Majoris.
Fekel F.C., Williamson M.H., Muterspaugh M.W., Pourbaix D., Willmarth D.,
Tomkin J.
<Astron. J., 149, 63 (2015)>
=2015AJ....149...63F 2015AJ....149...63F
ADC_Keywords: Binaries, spectroscopic ; Radial velocities
Keywords: binaries: spectroscopic - stars: fundamental parameters -
stars: individual: HD 54371, HR 2692, 16 UMa - stars: late-type
Abstract:
With extensive sets of new radial velocities we have determined
orbital elements for three previously known spectroscopic binaries, HD
54371, HR 2692, and 16 UMa. All three systems have had the lines of
their secondaries detected for the first time. The orbital periods
range from 16.24 to 113.23days, and the three binaries have modestly
or moderately eccentric orbits. The secondary to primary mass ratios
range from 0.50 to 0.64. The orbital dimensions (a1sini and
a2sini) and minimum masses (m1sin3i and m2sin3i) of the
binary components all have accuracies of ≤1%. With our spectroscopic
results and the Hipparcos data, we also have determined astrometric
orbits for two of the three systems, HR 2692 and 16 UMa. The primaries
of HD 54371 and 16 UMa are solar-type stars, and their secondaries are
likely K or M dwarfs. The primary of HR 2692 is a late-type subgiant
and its secondary is a G or K dwarf. The primaries of both HR 2692 and
16 UMa may be pseudosynchronously rotating, while that of HD 54371 is
rotating faster than its pseudosynchronous velocity.
Description:
We obtained our observations of the three program stars at three
observatories. Most of our spectrograms were acquired from 2003
through 2014 at Fairborn Observatory near Washington Camp in southeast
Arizona with the Tennessee State University 2m automatic spectroscopic
telescope (AST) and fiber-fed echelle spectrograph. Initially, the
detector was a 2048*4096 SITe ST-002A CCD with 15µm pixels. Those
AST echelle spectrograms have 21 orders that span the wavelength
region 4920-7100Å and have an average resolution of 0.17Å or a
resolving power of 35000 at 6000Å. The S/N of these observations at
6000Å generally ranged from 40 to 60. The SITe CCD and its dewar
were removed from the AST in the summer of 2011. They were replaced by
a Fairchild 486 CCD having a 4096*4096 array of 15µm pixels and a
new dewar. The new echelle spectrograms have 48 orders that range from
3800 to 8260Å. We also installed a 200µm diameter fiber that
produces a resolution of 0.24Å or a resolving power of 25000 at
6000Å for the new echelle spectra. Observations with the new
detector, dewar, and fiber resulted in much improved S/N that,
depending on sky conditions, ranged from 100 to 200 at 6000Å.
Spanning the years 2000-2004, Abt & Willmarth 2006 (cat.
J/ApJS/162/207) acquired additional spectrograms of the three binaries
at Kitt Peak National Observatory (KPNO) as part of a survey of
solar-type stars that examined their binary frequency and mass ratio
distribution. They obtained those observations with the 0.9m coude
feed telescope, coude spectrograph, and a CCD detector identified as
F3KB. The spectra covered 320Å, centered on 5200Å, and had a
resolution of 0.11Å/pixel or a 2 pixel resolving power of 24000.
The S/N of the spectra ranged from 40 to 80.
In 2002 and 2003 we collected several spectrograms at McDonald
Observatory with the 2.1m telescope, the Sandiford Cassegrain echelle
spectrograph, and a Reticon CCD. The wavelength region covered by
those spectra ranges from 5700 to 7000Å. They have a resolution of
0.13Å that corresponds to a resolving power of 49000 at 6350Å.
At that central wavelength, the S/N of the spectra are ∼200.
Finally, from 2003 through 2007 we acquired several additional spectra
at KPNO with the coude feed telescope, coude spectrograph, and a Texas
Instruments CCD detector. Those spectra are centered at 6430Å,
cover a wavelength range of 84Å, and have a resolution of 0.21Å
or a resolving power of just over 30000. They have S/N of ∼150.
File Summary:
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FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 53 3 Basic properties of the program stars
table3.dat 51 202 Radial velocities of HD 54371
table5.dat 51 261 Radial velocities of HR 2692
table7.dat 51 134 Radial velocities of 16 UMa
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See also:
B/sb9 : 9th Catalogue of Spectroscopic Binary Orbits (Pourbaix+ 2004-2014)
J/AJ/146/129 : Orbits of 4 double-lined spectroscopic binaries (Fekel+, 2013)
J/AJ/145/111 : Radial velocities of 5 spectroscopic binaries (Fekel+, 2013)
J/AJ/145/41 : Radial velocities of 33 spectroscopic binaries (Katoh+, 2013)
J/ApJS/180/117 : MK classifications of spectroscopic binaries (Abt, 2009)
J/ApJ/695/1527 : HR 8257: orbit and basic properties (Fekel+, 2009)
J/A+A/442/365 : Astrometric orbits of SB9 stars (Jancart+, 2005)
Byte-by-byte Description of file: table1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 6 A6 --- Name Common name of the star
8- 11 I4 --- HR ? HR number of the star
13- 17 I5 --- HD HD number of the star
19- 23 I5 --- HIP HIP number of the star (added at CDS)
25- 29 A5 --- SpT Spectral type (from this work)
31- 34 F4.2 mag Vmag V-band magnitude (1)
36- 40 F5.3 mag B-V The (B-V) color index (1)
42- 46 F5.2 mas Plx Parallax (2)
48- 53 F6.2 d Per [16/114] 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[357].dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 9 F9.3 d HJD Heliocentric Julian date (HJD-2400000)
11- 15 F5.3 --- Phase Fractional phase
17- 21 F5.1 km/s RV1 Radial velocity of primary
23- 26 F4.1 km/s O-C1 Velocity residual of primary (O-C)1
28- 30 F3.1 --- w_RV1 Weight of primary velocity
32- 36 F5.1 km/s RV2 ? Radial velocity of secondary
38- 41 F4.1 km/s O-C2 ? Velocity residual of secondary (O-C)2
43- 46 F4.2 --- w_RV2 ? Weight of secondary velocity
48- 51 A4 --- Obs Observatory source (Fair, McD, KPNO) (1)
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Note (1): Observatory identification defined as follows:
McD = McDonald Observatory;
KPNO = Kitt Peak National Observatory;
Fair = Fairborn 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 VIII, 2013AJ....146..129F 2013AJ....146..129F, cat. J/AJ/146/129
Fekel et al., Paper X., 2017AJ....154..120F 2017AJ....154..120F
(End) Greg Schwarz [AAS], Sylvain Guehenneux [CDS] 24-Feb-2015