J/AJ/148/72 Photometry & interferometry of nearby secondaries (Tokovinin, 2014)
Imaging survey of subsystems in secondary components to nearby southern dwarfs.
Tokovinin A.
<Astron. J., 148, 72 (2014)>
=2014AJ....148...72T 2014AJ....148...72T
ADC_Keywords: Stars, double and multiple ; Photometry ; Interferometry
Keywords: binaries: general
Abstract:
To improve the statistics of hierarchical multiplicity, secondary
components of wide nearby binaries with solar-type primaries were
surveyed at the SOAR telescope for evaluating the frequency of
subsystems. Images of 17 faint secondaries were obtained with the SOAR
Adaptive Module that improved the seeing; one new 0.2'' binary was
detected. For all targets, photometry in the g', i', z' bands is
given. Another 46 secondaries were observed by speckle interferometry,
resolving 7 close subsystems. Adding literature data, the binarity of
95 secondary components is evaluated. We found that the
detection-corrected frequency of secondary subsystems with periods in
the well-surveyed range from 103 to 105 days is 0.21±0.06--same
as the normal frequency of such binaries among solar-type stars, 0.18.
This indicates that wide binaries are unlikely to be produced by
dynamical evolution of N-body systems, but are rather formed by
fragmentation.
Description:
The night of 2014 March 4 was allocated for the survey with the
Southern Astrophysical Research Telescope (SOAR) Adaptive Module (SAM)
through NOAO (proposal 2014A-0039). In 2014 January-March, speckle
interferometry was performed at SOAR. The speckle camera is described
in Tokovinin et al. (2010AJ....140..510T 2010AJ....140..510T). We combine the secondary
components surveyed here with data from the literature.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table2.dat 35 21 Photometry of secondary components with the SOAR
Adaptive Module (SAM)
table3.dat 88 95 List of secondary components with high-resolution
imaging data
table4.dat 157 23 Secondary subsystems
--------------------------------------------------------------------------------
See also:
V/139 : The SDSS Photometric Catalog, Release 9 (Adelman-McCarthy+, 2012)
V/130 : Geneva-Copenhagen Survey of Solar neighbourhood III (Holmberg+, 2009)
J/AJ/147/87 : From binaries to multiples. II. Statistical data
(Tokovinin, 2014)
J/AJ/147/86 : From binaries to multiples. I. The FG-67 sample
(Tokovinin, 2014)
J/MNRAS/422/14 : Radial velocities of wide doubles (Halbwachs+, 2012)
J/AJ/144/102 : Catalog of wide companions to HIP stars (Tokovinin+, 2012)
J/A+A/525/A95 : Search for brown-dwarf companions of stars (Sahlmann+, 2011)
J/A+A/509/A52 : Search for companions with VLT/NACO (Chauvin+, 2010)
J/AJ/139/743 : Speckle interferometry in 2008-09 (Tokovinin+, 2010)
J/ApJS/181/62 : Survey of young solar analogs (Metchev+, 2009)
J/A+A/450/681 : Companions to close spectroscopic binaries (Tokovinin+, 2006)
Byte-by-byte Description of file: table2.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 5 I5 --- HIP1 Hipparcos number of the primary component
6 A1 --- Comp Secondary component identification
8- 12 F5.2 mag g'mag The SDSS g' band magnitude
14- 18 F5.2 mag i'mag The SDSS i' band magnitude
19 A1 --- f_i'mag [?] Uncertainty flag on i'mag
21- 25 F5.2 mag z'mag The SDSS z' band magnitude
27- 30 F4.2 --- AirM ? The air mass
32- 35 F4.2 arcsec FWHM ? The Full Width at Half Maximum resolution
in the z' band
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table3.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 6 I6 --- HIP1 Hipparcos number of the primary component (1)
8 A1 --- Comp Secondary component identification (1)
10- 15 F6.1 arcsec Sep Component separation from the primary (1)
17- 24 F8.4 deg RAdeg ICRS right ascension in decimal degrees
(J2000) (1)
26- 33 F8.4 deg DEdeg ICRS declination in decimal degrees (J2000) (1)
35- 38 I4 nm lambda [540/2272] Imaging wavelength
40- 44 F5.3 arcsec Sep0 [0.029/0.312] Minimum detectable separation
46- 50 F5.3 arcsec Sep1 [0.1/1] Separation 1
52- 57 F6.3 arcsec Sep2 [0.5/10] Separation 2
59- 63 F5.2 arcsec Sep3 [1.5/30] Maximum surveyed separation
65- 67 F3.1 mag dmag0 Detectable magnitude difference at Sep0
69- 71 F3.1 mag dmag1 Detectable magnitude difference at Sep1
73- 75 F3.1 mag dmag2 Detectable magnitude difference at Sep2
77- 79 F3.1 mag dmag3 Detectable magnitude difference at Sep3
81- 88 A8 --- Ref Reference code (2)
--------------------------------------------------------------------------------
Note (1): From Tokovinin 2014 (cat. J/AJ/147/86).
Note (2): Reference code defined as follows:
Bouy2008 = Bouy et al. (2008A&A...481..757B 2008A&A...481..757B);
Burg2005 = Burgasser et al. (2005AJ....129.2849B 2005AJ....129.2849B);
Clo2003 = Close et al. (2003ApJ...587..407C 2003ApJ...587..407C);
Cvn2010 = Chauvin et al. 2010 (cat. J/A+A/509/A52);
Egg2007 = Eggenberger et al.(2007A&A...474..273E 2007A&A...474..273E);
Jay2001 = Jayawardhana & Brandeker (2001ApJ...561L.111J 2001ApJ...561L.111J);
MH09 = Metchev & Hillenbrand 2009 (cat. J/ApJS/181/62);
Mug2009 = Mugrauer & Neuhaeuser (2009A&A...494..373M 2009A&A...494..373M);
NICI = Tokovinin et al. 2010 (cat. J/AJ/139/743);
SAM = Refers to the data of Section 2;
SOAR = Speckle observations (Section 3 in the paper);
Tok2006 = Tokovinin et al. 2006 (cat. J/A+A/450/681);
WDS = Visual micrometer resolution.
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table4.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 6 I6 --- HIP1 Hipparcos number of the primary component
8- 9 A2 --- Comp Secondary component identification
11 A1 --- f_Comp [ab] Triple system (1)
13- 18 A6 --- Type Discovery method (2)
20- 24 F5.3 arcsec Sep ? Separation for resolved subsystem
26- 29 F4.2 mag dmag ? Magnitude difference for resolved subsystem
31 A1 --- n_dmag Filter to which magnitude difference refers
(V, I, or K)
33- 36 F4.2 d logP ? Log of orbital period (3)
37 A1 --- u_logP [?] Uncertainty flag on logP
39- 42 F4.2 Msun M1 Mass of primary (3)
44- 47 F4.2 Msun M2 ? Mass of secondary (3)
49- 58 A10 --- OName Other component name
60- 66 A7 --- Disc Discoverer code from WDS (cat. B/wds) for
known visual pair (4)
68- 69 A2 --- m_Disc Component designation from WDS (cat. B/wds)
71- 74 A4 --- Tel Telescope (SOAR or SAM)
76-134 A59 --- Ref Reference
136-157 A22 --- Com Comments
--------------------------------------------------------------------------------
Note (1): Flag defined as follows:
a = HIP 66676B (=HD 118735) is resolved here into a triple system: Ca, Cb
has a separation of 0.16''. The density of background stars is high,
so there is still a chance that B and C are unrelated despite their
small separation of 0.92''.
b = HIP 85342B (=HIP 85326) has variable RV and Hipparcos acceleration. The
new 1'' companion is too distant to cause RV changes, so B can be triple.
Note (2): Method of discovery defined as follows:
a = astrometric acceleration;
s = spectroscopic;
S1 = spectroscopic, single-line
S2 = spectroscopic, double-line
v = direct resolution;
V = direct resolution.
Note (3): Estimated as explained in Tokovinin 2014 (cat. J/AJ/147/86).
Note (4): For these pairs, the WDS detection limits in Table4 are adopted from
Tokovinin 2014 (cat. J/AJ/147/86), e.g., Δm=2.5 at 0.15''.
--------------------------------------------------------------------------------
History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Sylvain Guehenneux [CDS] 01-Dec-2014