J/MNRAS/449/3160 Stellar multiplicity and debris discs (Rodriguez+, 2015)
Stellar multiplicity and debris discs: an unbiased sample.
Rodriguez D.R., Duchene G., Tom H., Kennedy G.M., Matthews B., Greaves J.,
Butner H.
<Mon. Not. R. Astron. Soc., 449, 3160-3170 (2015)>
=2015MNRAS.449.3160R 2015MNRAS.449.3160R (SIMBAD/NED BibCode)
ADC_Keywords: Stars, double and multiple
Keywords: binaries: general - infrared: planetary systems - infrared: stars
Abstract:
Circumstellar dust discs have been observed around many nearby stars.
However, many stars are part of binary or multiple stellar systems. A
natural question arises regarding the presence and properties of such
discs in systems with more than one star. To address this, we consider
a sample of 449 systems (spectral types A-M) observed with the
Herschel Space Observatory as part of the DEBRIS (Disc Emission via a
Bias-free Reconnaissance in the Infrared/Submillimetre) programme. We
have examined the stellar multiplicity of this sample by gathering
information from the literature and performing an adaptive optics
imaging survey at Lick Observatory. Five new companions were revealed
with our programme. In total, we identify 188 (42 per cent) binary or
multiple star systems. The multiplicity of the sample is examined with
regards to the detection of circumstellar discs for stars of spectral
types AFGK. In general, discs are less commonly detected around
binaries than single stars, though the disc frequency is comparable
among A stars regardless of multiplicity. However, this sample reveals
the period distribution of disc-bearing binaries is consistent with
that of non-disc binaries and with comparison field samples. We find
that the properties of discs in binary systems are not statistically
different from those around single stars. Although the frequency of
disc-bearing FGK binaries may be lower than in single star systems,
the processes behind disc formation and the characteristics of these
discs are comparable among both populations.
Description:
The DEBRIS sample consists of 451 stars, of which 2 are not primaries
(Fomalhaut B & C; see Mamajek et al. 2013AJ....146..154M 2013AJ....146..154M; Kennedy et
al. 2014MNRAS.438L..96K 2014MNRAS.438L..96K), and includes the 5 systems observed by the
Herschel Guaranteed Time (GT) discs programme (PI: Olofsson).
We present the full list of stars and multiplicity information in
Table 1. Some systems have tentative evidence of being astrometric
binaries, but no additional information exists to confirm this. These
systems are treated as single stars for this study. Binaries and
higher multiples are listed with more details in Table 2. In general,
we only have measurements of the period of spectroscopic binaries and
projected separation for visual binaries.
We have utilized the AO camera IRCAL at Lick Observatory to search for
companions separated from the primary by ∼10-1000AU.
Tables 4 and 5 list our observations and measured parameters for
binary and single stars, respectively.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 279 450 DEBRIS sample
table2.dat 51 252 DEBRIS multiples
table4.dat 55 56 IRCAL companion measurements
table5.dat 31 169 Single stars observed with IRCAL
refs.dat 98 71 References
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See also:
B/wds : The Washington Visual Double Star Catalog (Mason+ 2001-2014)
J/MNRAS/403/1089 : SUNS and DEBRIS surveys target selection (Phillips+, 2010)
J/AJ/143/135 : Ages of A-K type stars in DEBRIS survey (Vican, 2012)
Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 10 A10 --- Name Name
12- 15 A4 --- UNSid UNS identifier
17- 21 A5 --- Mult Multiplicity information
(Yes, No, possible Astrometric)
23-245 A223 --- Notes General notes
247-279 A33 --- Refs References, in refs.dat file
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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- 10 A10 --- Name Name
12- 16 A5 --- Comp Component
18- 25 A8 d Per Orbital period
27- 36 F10.3 AU Sep ? Orbital semimajor axis
38- 43 F6.4 --- Ecc ? Eccentricity
45 A1 --- Derived [aPN] Quantity derived:
a, semimajor axis; P, period; N, none
47- 51 F5.1 AU Dustr ? Location of blackbody dust grains
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 14 A14 --- Name Name
16- 18 A3 --- Filt [BrG Ks] Filter
20- 24 F5.2 arcsec Sep Measured separation
26- 31 F6.2 deg PA Position angle
33- 38 F6.3 mag Dmag Magnitude difference
40- 49 A10 "date" Obs.Date UT Date of observation
51- 55 F5.2 mag Depth ? Depth reached
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Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 10 A10 --- Name Name
12- 14 A3 --- Filt [BrG Ks] Filter
16- 25 A10 "date" Obs.Date UT Date of observation
27- 31 A5 mag Depth Depth reached
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Byte-by-byte Description of file: refs.dat
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Bytes Format Units Label Explanations
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1- 9 A9 --- Ref Reference code
11- 29 A19 --- BibCode BibCode
31- 51 A21 --- Aut Author's name
53- 98 A46 --- Com Comments
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 09-Dec-2015