J/MNRAS/449/2618 M-dwarfs in Multiples (MinMs) survey. I. (Ward-Duong+, 2015)
The M-dwarfs in Multiples (MinMs) survey.
I. Stellar multiplicity among low-mass stars within 15 pc.
Ward-Duong K., Patience J., De Rosa R.J., Bulger J., Rajan A.,
Goodwin S.P., Parker R.J., McCarthy D.W., Kulesa C.
<Mon. Not. R. Astron. Soc., 449, 2618-2637 (2015)>
=2015MNRAS.449.2618W 2015MNRAS.449.2618W (SIMBAD/NED BibCode)
ADC_Keywords: Stars, nearby ; Stars, dwarfs ; Stars, M-type ;
Stars, double and multiple
Keywords: techniques: high angular resolution - binaries: close -
binaries: general - binaries: visual - stars: late-type -
stars: low-mass
Abstract:
We present a large-scale, volume-limited companion survey of 245
late-K to mid-M (K7-M6) dwarfs within 15pc. Infrared adaptive optics
(AO) data were analysed from the Very Large Telescope, Subaru
Telescope, Canada-France-Hawaii Telescope, and MMT Observatory to
detect close companions to the sample from ∼1 to 100AU, while
digitized wide-field archival plates were searched for wide companions
from ∼100 to 10000AU. With sensitivity to the bottom of the main
sequence over a separation range of 3 to 10000AU, multiple AO and
wide-field epochs allow us to confirm candidates with common proper
motions, minimize background contamination, and enable a measurement
of comprehensive binary statistics. We detected 65 comoving stellar
companions and find a companion star fraction of 23.5±3.2 percent
over the 3 au to 10000AU separation range. The companion separation
distribution is observed to rise to a higher frequency at smaller
separations, peaking at closer separations than measured for more
massive primaries. The mass ratio distribution across the q=0.2-1.0
range is flat, similar to that of multiple systems with solar-type
primaries. The characterization of binary and multiple star frequency
for low-mass field stars can provide crucial comparisons with
star-forming environments and hold implications for the frequency and
evolutionary histories of their associated discs and planets.
Description:
The MinMs sample is derived from the new reduction of the Hipparcos
catalogue (van Leeuwen, 2007, Cat. I/311). We selected all stars with
parallaxes greater than π≥66.67mas, corresponding to stars located
within a distance limit of D≤15pc. In order to obtain precise
distances and absolute magnitudes, stars with parallax errors larger
than σπ/π≥0.10 were excluded from the sample. Johnson
V-band magnitudes were obtained from the original Hipparcos catalogue
(Perryman et al., 1997, Cat. I/239), which comprises ground- and
space-based photometry with uncertainties ≤0.08mag, and KS-band
magnitudes were obtained from the Two Micron All Sky Survey (2MASS;
Skrutskie et al., 2006, Cat. VII/233), providing V-Ks colours.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 127 245 The 245 K7-M6 dwarf sample within 15 pc
table2.dat 91 196 High-resolution imaging data
table4.dat 82 124 Confirmed companions - measured and derived
properties
tablea1.dat 78 245 Companion detection limits
--------------------------------------------------------------------------------
See also:
I/239 : The Hipparcos and Tycho Catalogues (ESA 1997)
VII/233 : The 2MASS Extended sources (IPAC/UMass, 2003-2006)
Byte-by-byte Description of file: table1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 6 I6 --- HIP HIP number
8- 17 F10.6 deg RAdeg Right ascension (J2000)
19- 28 F10.6 deg DEdeg Declination (J2000)
30- 36 F7.1 mas/yr pmRA Proper motion along RA
38- 44 F7.1 mas/yr pmDE Proper motion along DE
46- 50 F5.2 mag Vmag V magnitude
52- 56 F5.3 mag Jmag 2MASS J magnitude
58- 62 F5.3 mag e_Jmag rms uncertainty on Jmag
64- 68 F5.3 mag Hmag 2MASS H magnitude
70- 74 F5.3 mag e_Hmag rms uncertainty on Hmag
76- 80 F5.3 mag Ksmag 2MASS Ks magnitude
82- 86 F5.3 mag e_Ksmag rms uncertainty on Ksmag
89- 94 F6.2 mas plx HIP parallax
96-100 F5.2 mas e_plx rms uncertainty on plx
102-106 F5.2 pc Dist Distance
108-111 F4.2 pc e_Dist rms uncertainty on Dist
113-117 A5 --- SpType MK spectral type
119 A1 --- r_SpType [a-f] Reference for SpType (1)
121-125 F5.2 [-] [Fe/H] ? Metallicity
127 I1 --- r_[Fe/H] [1/4]? Reference for [Fe/H] (2)
--------------------------------------------------------------------------------
Note (1): Spectral type references for targets without PMSU classifications
as follows:
a = Gray et al., 2006, Cat. J/AJ/132/161
b = Browning et al. 2010AJ....139..504B 2010AJ....139..504B
c = Torres et al., 2006, Cat. J/A+A/460/695
d = Poveda et al. 2009ApJ...706..343P 2009ApJ...706..343P
e = Koen et al. 2010, Cat. J/MNRAS/403/1949
f = Houk & Cowley, 1975, Cat. III/31
Note (2): References as follows:
1 = Neves et al., 2014, 2014A&A...568A.121N 2014A&A...568A.121N
2 = Gaidos & Mann, 2014ApJ...791...54G 2014ApJ...791...54G
3 = Rojas-Ayala et al., 2012, Cat. J/ApJ/748/93
4 = Newton et al. 2014, Cat. J/AJ/147/20
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table2.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 6 I6 --- HIP HIP number
8- 13 A6 --- Tel Telescope
15- 22 A8 --- Inst Instrument
24- 37 A14 --- Filt Filter
39- 45 F7.4 s ExpTime Exposure time
47- 59 A13 --- Prog Programme ID
61- 79 A19 --- PI PI name
80 A1 --- n_PI [a] a: Observatory technical time
82- 91 A10 "date" Date UT date
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table4.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 6 I6 --- HIP JIP number
8- 9 A2 --- m_HIP WDS catalogue component designation
10 A1 --- f_HIP [*] * for new companion
11 A1 --- n_HIP [bcdef] Note on WDS component designation (1)
13- 22 A10 "date" Date UT date of observation
24- 29 F6.2 arcsec rho Angular separation
31- 34 F4.2 arcsec e_rho rms uncertainty on rho
37- 42 F6.1 AU aproj Projected radius
44- 47 F4.1 AU E_aproj Error on aproj (upper value)
49- 52 F4.1 AU e_aproj Error on aproj (lower value)
54- 58 F5.1 deg theta Position angle
60- 62 F3.1 deg e_theta rms uncertainty on theta
64- 67 F4.2 mag Deltam Magnitude difference
69- 70 A2 --- Filt Broad-band filter name
72- 75 F4.2 Msun Mprim Mass of the primary
77- 80 F4.2 Msun Msec Mass of the secondary
82 I1 --- Ep [1/2] Epoch number
--------------------------------------------------------------------------------
Note (1): Notes as follows:
b = Targets within the WDS catalogue, but without an assigned component
designation
c = Newly confirmed companion without a designation in the WDS catalogue
(* denotes a new companion)
d = HIP 91772 is designated as the 'B' component in the WDS catalogue, but
has the largest estimated mass of the system
e = A target for which there is no second epoch detection, but instead a
non-detection of a background object (Section 4.3)
f = Instance where second epoch data were not available, but multiple
confirmation epochs were obtained from previous WDS measurements
--------------------------------------------------------------------------------
Byte-by-byte Description of file: tablea1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 3 A3 --- --- [HIP]
4- 9 I6 --- HIP HIP number
11- 14 F4.2 mag AODm0.05 ?=- Adaptative optic (AO) δm at
rho=0.05arcsec
16- 20 F5.2 mag AODm0.15 ?=- Adaptative optic (AO) δm at
rho=0.15arcsec
22- 25 F4.2 mag AODm0.25 ?=- Adaptative optic (AO) δm at
rho=0.25arcsec
27- 30 F4.2 mag AODm0.50 ?=- Adaptative optic (AO) δm at
rho=0.50arcsec
32- 35 F4.2 mag AODm1.00 ?=- Adaptative optic (AO) δm at
rho=1.00arcsec
37- 41 F5.2 mag AODm1.50 ?=- Adaptative optic (AO) δm at
rho=1.50arcsec
43- 47 F5.2 mag AODm2.00 ?=- Adaptative optic (AO) δm at
rho=2.00arcsec
49- 53 F5.2 mag AODm5.00 ?=- Adaptative optic (AO) δm at
rho=5.00arcsec
55- 59 F5.2 mag AODm10.00 ?=- Adaptative optic (AO) δm at
rho=10.00arcsec
61- 65 F5.2 arcsec rhoAOmax ?=- Maximum AO rho value sensitive to full M5
67- 71 F5.2 arcsec rhoplatemin Minimum plate rho value sensitive to full M5
73- 78 F6.2 arcsec rhoplatemax Maximum plate rho value sensitive to full M5
--------------------------------------------------------------------------------
History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 07-Dec-2015