J/AJ/144/102 Catalog of wide companions to Hipparcos stars (Tokovinin+, 2012)
Wide companions to Hipparcos stars within 67 pc of the Sun.
Tokovinin A., Lepine S.
<Astron. J., 144, 102 (2012)>
=2012AJ....144..102T 2012AJ....144..102T
ADC_Keywords: Stars, double and multiple ; Proper motions ;
Parallaxes, trigonometric ;
Keywords: binaries: general
Abstract:
A catalog of common-proper-motion (CPM) companions to stars within
67pc of the Sun is constructed based on the SUPERBLINK proper-motion
survey. It contains 1392 CPM pairs with angular separations
30"<ρ<1800", relative proper motion between the two components
less than 25mas/yr, and magnitudes and colors of the secondaries
consistent with those of dwarfs in the (MV, V-J) diagram. In
addition, we list 21 candidate white dwarf CPM companions with
separations under 300", about half of which should be physical. We
estimate a 0.31 fraction of pairs with red dwarf companions to be
physical systems (about 425 objects), while the rest (mostly wide
pairs) are chance alignments. For each candidate companion, the
probability of a physical association is evaluated. The distribution
of projected separations s of the physical pairs between 2kAU and
64kAU follows f(s)∝s-1.5, which decreases faster than Opik's
law. We find that solar-mass dwarfs have no less than 4.4%±0.3%
companions with separations larger than 2kAU, or 3.8%±0.3% per
decade of orbital separation in the 2-16kAU range. The distribution of
mass ratio of those wide companions is approximately uniform in the
0.1<q<1.0 range, although we observe a dip at q≃0.5 which, if
confirmed, could be evidence of bimodal distribution of companion
masses. New physical CPM companions to two exoplanet host stars are
discovered.
Description:
We select as possible primaries of common-proper-motion (CPM) pairs
all stars from HIP2 (cat. I/311) with parallax greater than 15mas and
proper motion larger than the SUPERBLINK limit (µ>40mas/yr for
stars north of declination -20° and µ>150mas/yr otherwise).
Potential CPM companions to these stars were selected from the
SUPERBLINK all-sky proper-motion catalog, which is an extension of the
LSPM-north catalog (Lepine et al., 2005, cat I/298).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 223 1413 Catalog of wide common-proper-motion (CPM)
companions
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See also:
I/276 : Tycho Double Star Catalogue (TDSC) (Fabricius+ 2002)
III/235 : Spectroscopically Identified White Dwarfs (McCook+, 2008)
I/311 : Hipparcos, the New Reduction (van Leeuwen, 2007)
I/298 : LSPM-North Catalog (Lepine+ 2005)
II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003)
I/284 : The USNO-B1.0 Catalog (Monet+ 2003)
V/109 : SKY2000 Catalog, Version 4 (Myers+ 2002)
I/259 : The Tycho-2 Catalogue (Hog+ 2000)
I/239 : The Hipparcos and Tycho Catalogues (ESA 1997)
I/238 : Yale Trigonometric Parallaxes, Fourth Edition (van Altena+ 1995)
J/AJ/144/7 : Near-IR imaging of Hipparcos astrometric binaries
(Tokovinin+, 2012)
J/AJ/141/52 : Low-mass visual companions to nearby G-dwarfs
(Tokovinin, 2011)
J/ApJS/192/2 : A Bayesian search for binaries in Hipparcos (Shaya+, 2011)
J/ApJS/190/1 : A survey of stellar families (Raghavan+, 2010)
J/AJ/139/2566 : SLoWPoKES catalog (Dhital+, 2010)
J/AJ/135/2177 : High proper motion stars in the DSS. IV. (Lepine, 2008)
J/AJ/133/889 : Faint companions of Hipparcos stars (Lepine+, 2007)
J/AJ/130/1680 : LSPM-North proper-motion catalog nearby stars (Lepine+, 2005)
J/AJ/129/2420 : Proper motion derivatives of binaries (Makarov+, 2005)
J/ApJS/150/455 : New HIP-based parallaxes for 424 faint stars (Gould+, 2004)
http://nstars.nau.edu/nau_nstars/index.htm : NSTARS database
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 6 I6 --- HIP1 Hipparcos primary identifier
8- 20 A13 --- PM1 SUPERBLINK primary identification
22- 31 F10.6 deg RAdeg Primary Right Ascension (J2000)
33- 42 F10.6 deg DEdeg Primary Declination (J2000)
44- 49 F6.3 arcsec/yr pmRA1 Primary proper motion along RA direction
51- 56 F6.3 arcsec/yr pmDE1 Primary proper motion along DE direction
58- 62 F5.2 mag Vmag1 Primary V band magnitude (1)
64- 68 F5.2 mag (V-J)1 Primary (V-J) color index
70- 74 F5.2 mag Jmag1 Primary 2MASS J band magnitude
76- 80 F5.2 mag Hmag1 Primary 2MASS H band magnitude
82- 86 F5.2 mag Kmag1 Primary 2MASS Ks band magnitude
88- 92 F5.1 mas plx1 Primary parallax
94- 97 F4.1 mas e_plx1 The 1σ error in plx1
99-102 A4 --- r_plx1 Primary parallax origin (2)
104-109 F6.1 arcsec Sep [30/1800] System separation
111-114 F4.1 mas/yr Dmu Proper motion difference with primary
target Δµ
116-121 F6.3 --- Pphys [-1/1.6] Estimated probability of physical
association (3)
123-128 I6 --- HIP2 ?=999999 Hipparcos secondary identifier (if
available)
130-141 A12 --- PM2 SUPERBLINK secondary identification
143-152 F10.6 deg RA2deg Secondary Right Ascension (J2000)
154-163 F10.6 deg DE2deg Secondary Declination (J2000)
165-170 F6.3 arcsec/yr pmRA2 Secondary proper motion along RA direction
172-177 F6.3 arcsec/yr pmDE2 Secondary proper motion along DE direction
179-183 F5.2 mag Vmag2 ?=99.90 Secondary V band magnitude (1)
185-189 F5.2 mag (V-J)2 ?=99.90 Secondary (V-J) color
191-195 F5.2 mag Jmag2 ?=99.90 Secondary 2MASS J band magnitude
197-201 F5.2 mag Hmag2 ?=99.90 Secondary 2MASS H band magnitude
203-207 F5.2 mag Kmag2 ?=99.90 Secondary 2MASS Ks band magnitude
209-213 F5.1 mas plx2 Secondary parallax (4)
215-218 F4.1 mas e_plx2 The 1σ error in plx2
220-223 A4 --- r_plx2 Secondary secondary parallax origin (2)
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Note (1): Derived from the Digitized Sky Survey (DSS) for faint stars or taken
from Tycho-2 (cat. I/259) for bright ones.
Note (2): Parallax code as follows:
PLX1 = Trigonometric parallax from HIP2 (cat. I/311).
PLX2 = Trigonometric parallax from van Altena et al. (1995, cat. I/238).
PLX3 = Trigonometric parallax from NSTARS database
(http://nstars.nau.edu/nau_nstars/index.htm).
PLX4 = Trigonometric parallax from Myers et al. (2002, cat. V/109).
PLX5 = Trigonometric parallax from McCook & Sion (1999, cat. III/210,
superseded by III/235).
PHOT = Photometric parallax.
Note (3): Companions in the white dwarf (WD) region of the color-magnitude
diagram (see Section 2.2) are distinguished by Pphys=-1 and listed at
the end (21 potential WD companions, half of those should be true)
Note (4): Photometric parallaxes estimated from the MV, V-J relation have
code PHOT in Column r_plx2, and their errors (column e_plx2) are set to
zero.
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Sylvain Guehenneux [CDS] 23-Oct-2013