J/AJ/161/295 Obs. with Differential Speckle Survey Instrument. X. (Horch+, 2021)
Observations with the Differential Speckle Survey Instrument.
X. Preliminary orbits of K-dwarf binaries and other stars.
Horch E.P., Broderick K.G., Casetti-Dinescu D.I., Henry T.J., Fekel F.C.,
Muterspaugh M.W., Willmarth D.W., Winters J.G., van Belle G.T., Clark C.A.,
Everett M.E.
<Astron. J., 161, 295 (2021)>
=2021AJ....161..295H 2021AJ....161..295H
ADC_Keywords: Stars, double and multiple; Stars, dwarfs; Stars, K-type;
Positional data; Spectra, optical; Radial velocities;
Spectral types
Keywords: Visual binary stars ; Spectroscopic binary stars ;
Interferometric binary stars ; Speckle interferometry ; K dwarf stars
Abstract:
This paper details speckle observations of binary stars taken at the
Lowell Discovery Telescope, the WIYN telescope, and the Gemini
telescopes between 2016 January and 2019 September. The observations
taken at Gemini and Lowell were done with the Differential Speckle
Survey Instrument (DSSI), and those done at WIYN were taken with the
successor instrument to DSSI at that site, the NN-EXPLORE Exoplanet
Star and Speckle Imager (NESSI). In total, we present 378 observations
of 178 systems, and we show that the uncertainty in the measurement
precision for the combined data set is ∼2mas in separation,
∼1°-2° in position angle depending on the separation, and
∼0.1mag in magnitude difference. Together with data already in the
literature, these new results permit 25 visual orbits and one
spectroscopic- visual orbit to be calculated for the first time. In
the case of the spectroscopic-visual analysis, which is done on the
ternary star HD173093, we calculate masses with a precision of better
than 1% for all three stars in that system. Twenty-one of the visual
orbits calculated have a K-dwarf as the primary star; we add these to
the known orbits of K-dwarf primary stars and discuss the basic
orbital properties of these stars at this stage. Although incomplete,
the data that exist so far indicate that binaries with K-dwarf
primaries tend not to have low-eccentricity orbits at separations of
one to a few tens of astronomical units, that is, on solar system
scales.
Description:
The results presented here are derived from observing runs that took
place at the Lowell Discovery Telescope (LDT), WIYN, and the two
Gemini telescopes from 2016 through 2019. The Differential Speckle
Survey Instrument (DSSI) was used at the LDT for the majority of the
observations (PaperI). We then supplemented this data set with a run
at the WIYN telescope with the NESSI speckle camera in 2019, two
nights of which were provided via Director's Discretionary Time. A few
further observations taken at Gemini-S in 2017 June and at Gemini-N in
2016 January are also included that bear directly on the orbit
calculations presented later in this paper. We have obtained a large
number of observations for the program from both the WIYN and Gemini
telescopes. In the current paper, we seek to focus primarily on
objects where some previous observations exist so that orbits can be
calculated either now or in the near future.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 81 21 Orbits and residuals used in the scale determinations
table3.dat 81 378 Binary star Speckle measures
table4.dat 138 25 Visual orbital elements for 25 systems
table6.dat 99 324 Radial velocity of HD173093
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See also:
J/AJ/131/2681 : Orbits for three visual binaries (Tamazian+, 2006)
J/AJ/141/45 : Speckle observations of HIP stars (Horch+, 2011)
J/AJ/145/52 : Abundances of late K & M dwarfs in binary systems (Mann+, 2013)
J/AJ/150/151 : DSSI obs. of binaries. VI. Measures in 2014 (Horch+, 2015)
J/AJ/152/138 : Orbits based on speckle interferometry SOAR (Tokovinin, 2016)
J/AJ/153/212 : Observations of binary stars at WIYN telescope (Horch+, 2017)
J/AJ/154/273 : New orbits for 18 binaries (Cvetkovic+, 2017)
J/MNRAS/474/4322 : Orbital parameters of 341 new binaries (Murphy+, 2018)
J/AJ/157/56 : DSSI obs. of binary & trinary star systems (Horch+, 2019)
J/PAZh/45/35 : Orbits of 451 wide visual double stars (Izmailov, 2019)
J/AJ/159/233 : Observations of binary stars with the DSSI. IX. (Horch+, 2020)
J/AZh/98/239 : Orbits of Four Visual Binaries (Romanenko+, 2021)
Byte-by-byte Description of file: table2.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 2 I2 --- Run [1/10] Run
4- 13 A10 --- WDS Washington Double Star number
15- 24 A10 --- Design Binary discover designation
26- 31 I6 --- HIP Hipparcos Catalogue number
33- 41 F9.4 yr Date [2016/2020] Fractional Julian Year of orbit
43- 46 F4.1 deg PAA [-0.6/0.7] Position angle, component A
(ΔθA)
48- 51 F4.1 mas SepA [-3.2/3] Separation, component A (ΔρA)
53- 56 F4.1 deg PAB [-0.6/0.5] Position angle, component B
(ΔθB)
58- 61 F4.1 mas SepB [-2.8/3] Separation, component B (ΔρB)
63- 81 A19 --- Ref Orbit Reference (bibcode)
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Byte-by-byte Description of file: table3.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 10 A10 --- WDS Washington Double Star number
12- 22 A11 --- OName Other designations
24- 36 A13 --- Design Binary discover designation
39- 44 A6 --- HIP Hipparcos Catalogue number
46- 52 F7.4 yr Date [16/20] Julian year of the observation;
offset 2000+
54- 58 F5.1 deg PA [2.2/359] Position angle of the secondary star
relative to the primary (1)
60- 65 F6.4 arcsec Sep [0.01/3.24] Separation of the two stars
67- 67 A1 --- l_dmag [<] Limit flag on dmag
68- 72 F5.2 mag dmag [-0.04/7.44] Magnitude difference of the pair in
the filter used
74- 76 I3 nm lambda [562/880] Center wavelength of the filter used
78- 79 I2 nm FWHM [40/50] Full width at half maximum of the filter
transmission
81 A1 --- Flag catalog entry flags (2)
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Note (1): North through East defining the positive sense of PA
Note (2): Flags as follows:
a = Photometry for this observation appears as an upper limit because the
observation may be affected by speckle decorrelation as discussed in
the text (115 occurrences)
b = Quadrant inconsistent with other published measures (28 occurrences)
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Byte-by-byte Description of file: table4.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 10 A10 --- WDS Washington Double Star number
12- 23 A12 --- Design Binary discover designation
25- 30 I6 --- HIP Hipparcos Catalogue number
32- 38 A7 --- SpT Spectral Type from SIMBAD
40- 46 F7.3 yr Per [3.72/209] Orbital period
48- 53 F6.4 arcsec a [0.08/1.2] Semi-major axis
55- 61 F7.3 deg i [22.9/166] Orbital inclination
63- 68 F6.2 deg Omega [7.7/341] Longitude of ascending node, Ω
70- 77 F8.3 yr T0 [1999/2188] Time of periastron passage
79- 84 F6.4 --- e [0.1/0.9] Eccentricity
86- 91 F6.2 deg omega [25.8/386] Argument of periastron, ω
93- 98 F6.3 yr e_Per [0.01/18] Uncertainty in Per
100-105 F6.4 arcsec e_a [0.001/0.05] Uncertainty in a
107-112 F6.3 deg e_i [0.07/14] Uncertainty in i
114-118 F5.2 deg e_Omega [0.3/19] Uncertainty in Omega
120-125 F6.3 yr e_T0 [0.02/21] Uncertainty in T0
127-132 F6.4 --- e_e [0.007/0.2] Uncertainty in e
134-138 F5.2 deg e_omega [0.2/40] Uncertainty in omega
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Byte-by-byte Description of file: table6.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 10 F10.4 d MJD [52073/59021] Modified Julian Date; MJD-2400000.5
12- 18 F7.3 km/s RVAa [-82.9/-19.2]? Measured Radial Velocity of the Aa
Component
20- 26 F7.3 km/s ModRVAa [-82.3/-19.1]? Model Radial Velocity of the Aa
Component
28- 33 F6.3 km/s OCAa [-2.3/2]? Observed minus Calculated Residual for
the Aa Component
35- 39 F5.3 km/s SigmaAa [0.37/1.1]? Sigma of the Aa Component
41- 47 F7.3 km/s RVAb [-82.6/-17.3]? Measured Radial Velocity of the Ab
Component
49- 55 F7.3 km/s ModRVAb [-83.1/-17.7]? Model Radial Velocity of the Ab
Component
57- 62 F6.3 km/s OCAb [-2.1/2]? Observed minus Calculated Residual for
the Ab Component
64- 68 F5.3 km/s SigmaAb [0.42/0.88]? Sigma of the Ab Component
70- 76 F7.3 km/s RVB [-66.7/-23.9]? Measured Radial Velocity of the B
Component
78- 84 F7.3 km/s ModRVB [-66.3/-25.3]? Model Radial Velocity of the B
Component
86- 91 F6.3 km/s OCB [-2.7/1.6]? Observed minus Calculated Residual for
the B Component
93- 97 F5.3 km/s SigmaB [0.52/1.52]? Sigma of the B Component
99- 99 I1 --- Set [1/3] Observational Set (1)
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Note (1): Sets are drawn from the following sources. Blank entries in
Set 1 indicate that the velocity for a given component was not used in
the fit due to extensive line blending. Set 1 = KPNO velocities
obtained by D. Willmarth; Set 2 = KPNO velocities obtained by F.
Fekel; Set 3 = Fairborn Observatory.
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History:
From electronic version of the journal
References:
Horch et al. Paper I : 2009AJ....137.5057H 2009AJ....137.5057H
Horch et al. Paper II : 2011AJ....141...45H 2011AJ....141...45H Cat. J/AJ/141/45
Horch et al. Paper III : 2011AJ....141..180H 2011AJ....141..180H
Horch et al. Paper IV : 2012AJ....144..165H 2012AJ....144..165H
Horch et al. Paper V : 2015AJ....149..151H 2015AJ....149..151H
Horch et al. Paper VI : 2015AJ....150..151H 2015AJ....150..151H Cat. J/AJ/150/151
Horch et al. Paper VII : 2017AJ....153..212H 2017AJ....153..212H Cat. J/AJ/153/212
Horch et al. Paper VIII : 2019AJ....157...56H 2019AJ....157...56H Cat. J/AJ/157/56
Horch et al. Paper IX : 2020AJ....159..233H 2020AJ....159..233H Cat. J/AJ/159/233
(End) Prepared by [AAS], Coralie Fix [CDS], 11-Aug-2021