J/AJ/134/2353 Observations of contact binaries (Rucinski+, 2007)
Contact binaries with additional components.
III. A search using adaptive optics.
Rucinski S.M., Pribulla T., Van Kerkwijk M.H.
<Astron. J., 134, 2353-2365 (2007)>
=2007AJ....134.2353R 2007AJ....134.2353R
ADC_Keywords: Binaries, eclipsing ; Stars, double and multiple ; Photometry
Keywords: binaries: close - binaries: eclipsing - stars: variables: other
Abstract:
We present results of the Canada-France-Hawaii Telescope adaptive
optics (AO) search for companions of a homogeneous group of contact
binary stars, as a contribution to our attempts to prove the
hypothesis that these binaries require a third star to become as close
as observed.
Description:
We obtained observations aimed at the direct detection of companions
of contact binary stars on the nights of 1998 January 10 and July 23,
and 2005 October 17 and 18 using the AO system at the
Canada-France-Hawaii Telescope (CFHT).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 32 642 Journal of the AO observations during the three
observing runs of January 10, 1998, July 23,
1998 and October 17-18, 2005
table2.dat 13 80 Overview of observed systems and detections of
visual companions
table5.dat 107 40 Companions of contact binaries detected or
confirmed during this program
table6.dat 116 16 Properties of contact binaries with newly
detected companions
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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- 6 I6 --- Num Frame number
8- 16 A9 --- Name Object name
18- 29 F12.4 d Date Heliocentric Julian Date
31- 32 A2 --- Filt Filter used
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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- 9 A9 --- Name Star name
11 A1 --- Run1 [CDN-] Run 1 (1998/01/10) detection code (1)
12 A1 --- Run2 [CDN-] Run 2 (1998/07/23) detection code (1)
13 A1 --- Run3 [CDN-] Run 3 (2005/10/17-18) detection code (1)
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Note (1): Detection code is:
- = not observed in that run
N = no detection
D = detection at a separation of <5"
C = a very close pair, with possible detection through
a deformation of the diffraction pattern
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Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
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1 A1 --- Flag [NC] N for New, C for Confirmed Detections
3- 11 A9 --- Name Star name
13- 24 F12.4 d HJD Date the observation
26- 30 F5.3 --- Phase Orbital phase of the binary
32- 35 F4.2 ---- dVphi ? Correction of binary brightness
37- 41 F5.1 mas plx Hipparcos parallax used to estimate absolute
magnitudes
43- 47 F5.3 arcsec rho ? Separation
49- 52 F4.3 arcsec e_rho ? rms uncertainty on rho
54- 59 F6.2 deg theta ? Position angle
61- 65 F5.2 deg e_theta ? rms uncertainty on theta
67- 72 F6.3 --- dKmag ? Magnitude difference in K band
74- 78 F5.3 --- e_dKmag ? rms uncertainty on DKmag
80- 84 F5.3 --- dHmag ? Magnitude difference in H band
86- 90 F5.3 --- e_dHmag ? rms uncertainty on DHmag
92- 95 F4.2 mag KMAG ? Absolute K magnitude
97-100 F4.2 mag HMAG ? Absolute H magnitude
102-107 A6 --- SpT MK spectral type
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Byte-by-byte Description of file: table6.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- Name Star name
11- 15 F5.2 mag Vmax Maximum V magnitude
17- 20 F4.2 mag dVmag Difference in V band
22- 26 F5.2 mas plx Parallax
28- 31 F4.2 mas e_plx ?=- rms uncertainty on plx
33- 37 F5.1 mas/yr pm Total proper motion
39- 44 A6 --- SpT MK spectral type
46- 49 F4.2 mag (B-V)0 Deredenned B-V colour index
51- 54 F4.2 mag VMAGc Calculated absolute V magnitude
56- 59 F4.2 mag VMAG Spectroscopic absolute V magnitude
61- 64 F4.2 mag HMAG Spectroscopic absolute H magnitude
66- 69 F4.2 mag KMAG Spectroscopic absolute K magnitude
71- 74 F4.2 mag HMAGc Corrected absolute H magnitude
76- 79 F4.2 mag KMAGc Corrected absolute K magnitude
81- 85 F5.3 solMass M12 ?=- Mass of the binary system
87- 92 A6 --- SpTc Comp. MK spectral type
94 A1 --- l_M3 Limit flag on M3
95- 98 F4.2 solMass M3 estimated mass of the third companion
99 A1 --- --- [-]
100-102 F3.1 solMass M3u ? Upper value of M3 when interval
104-108 F5.1 AU a ? Semi-major axis
110-116 F7.1 yr Pvis ?=- Visual period
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History:
From electronic version of the journal
References:
Pribulla & Rucinski, Paper I 2006AJ....131.2986P 2006AJ....131.2986P, Cat. J/AJ/131/2986
D'Angelo et al., Paper II 2006AJ....132..650D 2006AJ....132..650D
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 13-Feb-2010