J/A+A/325/159 Companions to M dwarfs within 5pc (Leinert+ 1997)
A search for companions to nearby southern M dwarfs with near-infrared
speckle interferometry
Leinert C., Henry T., Glindemann A., McCArthy D.W. Jr.
<Astron. Astrophys. 325, 159 (1997)>
=1997A&A...325..159L 1997A&A...325..159L (SIMBAD/NED BibCode)
ADC_Keywords: Stars, double and multiple ; Stars, M-type ; Photometry
Keywords: binaries: general - stars: low-mass -
stars: luminosity function, mass function
Description:
The paper contains four tables which summarise the duplicity status of
the 34 M dwarf primaries within 5.0pc.
Table 1 gives the basic data for the sample: designation, coordinates,
V,J,H,K photometry, parallax
Table 2 gives, for the nine southern sources, magnitude limits for
possible undetected companions. These limits are given
for assumed projected separations of 1AU, 2AU, 5AU, and 10AU. In
addition, the circumstances of the observation are given:
date, telescope, and observational technique.
Table 3 repeats, in updated form, the same information (except for
the date) for the 25 northern sources.
Table 4 lists the nine M dwarf primaries within 5pc which do have one
or more companions.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1 72 40 Basic data for all M dwarfs within five parsecs
table2 61 39 Companion magnitude limits for southern
M dwarfs within five parsecs
table3 44 30 *Updated summary of magnitude limits for
northern M dwarfs within five parsecs
tables.tex 112 346 LaTeX version of the tables
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Note on table3: Membership updates include new parallaxes from Jahreiss (1997,
Catalogue of Nerby Stars, A&AS, in press).
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Byte-by-byte Description of file: table1
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Bytes Format Units Label Explanations
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1 A1 --- Loc [SN] S: southern stars (δ≤-30deg)
N: northern stars (δ>-30deg)
3- 16 A14 --- Name Object designation
17 A1 --- Note [abc] Note (1)
19- 20 I2 h RAh Right ascension (J2000)
22- 23 I2 min RAm Right ascension (J2000)
25- 28 F4.1 s RAs Right ascension (J2000)
30 A1 --- DE- Declination sign
31- 32 I2 deg DEd Declination (J2000)
34- 35 I2 arcmin DEm Declination (J2000)
37- 38 I2 arcsec DEs Declination (J2000)
40- 44 F5.2 mag Vmag V magnitude (apparent)
46- 49 F4.2 mag Jmag J magnitude (apparent) (1.20µm)
51- 54 F4.2 mag Hmag H magnitude (apparent) (1.62µm)
56- 59 F4.2 mag Kmag K magnitude (apparent) (2.20µm)
62- 67 F6.4 arcsec plx trigonometric parallax
69- 72 F4.2 mag KMag K magnitude (absolute)
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Note (1): a: V photometry from Jahreiss (1997, Catalogue of Nerby Stars, A&AS,
in press)
JHK from this paper all other photometry from
Leggett (1992ApJS...82..351L 1992ApJS...82..351L)
errors: ≤ 0.03 magnitudes in VJHK
b: not a primary
c: parallaxes are from the Third Catalogue of Nearby Stars,
Jahreiss (1997, A&AS, in press)
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Byte-by-byte Description of file: table2
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Bytes Format Units Label Explanations
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1- 10 A10 --- Name Object designation
12- 17 A6 --- Tech Applied technique (1)
19- 26 A8 "DD/MM/YY" Obsdate Date of observations
28- 36 A9 --- Tel Telscope used
38- 39 A2 --- Band Wavelength band
41- 44 F4.1 mag Mag1AU ? Magnitude limit for separation 1 AU (2)
45 A1 --- u_Mag1AU Uncertainty flag on Mag1AU
47- 50 F4.1 mag Mag2AU Magnitude limit for separation 2 AU (2)
51 A1 --- u_Mag2AU Uncertainty flag on Mag2AU
53- 56 F4.1 mag Mag5AU Magnitude limit for separation 5 AU (2)
58- 61 F4.1 mag Mag10AU Magnitude limit for separation 10 AU (2)
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Note (1): 1D NS : one-dimensional slit-scanning speckle observations in
north-south direction
1D EW : same in east-west direction
2D SPK: speckle observations with a two-dimensional array detector
Note (2): The companion brightness limits are given in absolute magnitudes.
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Byte-by-byte Description of file: table3
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Bytes Format Units Label Explanations
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1- 14 A14 --- Name Object designation
16- 21 A6 --- Tech Applied technique
23 A1 --- Band Wavelength band
25- 28 F4.1 mag Mag1AU ? Magnitude limit for separation 1 AU (1)
30- 33 F4.1 mag Mag2AU ? Magnitude limit for separation 2 AU (1)
35- 38 F4.1 mag Mag5AU ? Magnitude limit for separation 5 AU (1)
40- 43 F4.1 mag Mag10AU ? Magnitude limit for separation 10 AU (1)
44 A1 --- Note [c] c: Companion detected (2)
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Note (1): Detection limits include data from Henry (1991, Ph.D. Thesis,
Arizona Univ., Tuscon)
and effects of new parallaxes. These limits supersede those given
in Henry & McCarthy (1990ApJ...350..334H 1990ApJ...350..334H).
Note (2): See Henry & McCarthy (1990ApJ...350..334H 1990ApJ...350..334H) for details
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Table4 : Multiple systems in the M dwarf five parsec sample.
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Name Type of multiplicity References
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Gliese 15 binary GJ,HM
Gliese 65 binary GJ,HM
Gliese 234 binary GJ,HM
Gliese 412a binary GJ
Gliese 473 binary GJ,HM
Gliese 725 binary GJ,HM
GJ 1245 triple GJ,HM
Gliese 860 binary GJ,HM
Gliese 866b triple HM,LH
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Notes: a: new parallax places system within 5 pc;
not included in Henry and McCarthy (1990ApJ...350..334H 1990ApJ...350..334H)
b: third component spectroscopically detected,
private communications by A.Duquennoy and D.Latham
References: GJ = Jahreiss (1997, Catalog of Nearby Stars, A&AS, in press)
HM = Henry and McCarthy (1990ApJ...350..334H 1990ApJ...350..334H),
LH = Leinert et al. (1990A&A...236..399L 1990A&A...236..399L)
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Acknowledgements: Christoph Leinert
References:
Jahreiss (1997), Third Catalogue of Nearby Stars, in press, see Cat. V/70
(End) Patricia Bauer [CDS] 27-Feb-1997