Access to Astronomical Catalogues

← Click to display the menu
J/ApJ/667/520        Proper motions in multiple systems        (Caballero, 2007)

Southern very low mass stars and brown dwarfs in wide binary and multiple systems. Caballero J.A. <Astrophys. J., 667, 520-526 (2007)> =2007ApJ...667..520C (SIMBAD/NED BibCode)
ADC_Keywords: Stars, double and multiple ; Proper motions Keywords: binaries: visual - stars: formation - stars: individual (2MASS J23310161-0406193 AB, HD 221356, LP 655-23) - stars: low-mass, brown dwarfs Abstract: The results of the Koenigstuhl survey in the Southern Hemisphere are presented. I have searched for common proper motion companions to 173 field very low mass stars and brown dwarfs with spectral types >M5.0 V and magnitudes J≲14.5mag. I have measured for the first time the common proper motion of two new wide systems containing very low mass components, Koenigstuhl 2 AB and 3 A-BC. Together with Koenigstuhl 1 AB and 2M 0126-50 AB, they are among the widest systems in their respective classes (r=450-11900AU). I have determined the minimum frequency of field wide multiples (r>100AU) with late-type components at 5.0%±1.8% and the frequency of field wide late-type binaries with mass ratios q>0.5 at 1.2%±0.9%. These values represent a key diagnostic of evolution history and low-mass star and brown dwarf formation scenarios. In addition, the proper motions of 62 field very low mass dwarfs are measured here for the first time. Description: I have performed a proper-motion survey, called Koenigstuhl, using the United Kingdom Schmidt Telescope (UKST) and Palomar Observatory Sky Survey I (POSS-I) plates and the SuperCOSMOS Science Archive (SSA). File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table3.dat 114 181 Investigated very low-mass dwarfs and proper-motion companions
See also: J/A+A/450/681 : Companions to close spectroscopic binaries (Tokovinin+, 2006) Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
1- 25 A25 --- Name Object name 27- 32 A6 --- m_Name Component identification 34- 49 A16 --- Aname Alternative name 51- 52 I2 h RAh Hour of Right Ascension (J2000) 54- 55 I2 min RAm Minute of Right Ascension (J2000) 57- 60 F4.1 s RAs Second of Right Ascension (J2000) 62 A1 --- DE- Sign of the Declination (J2000) 63- 64 I2 deg DEd Degree of Declination (J2000) 66- 67 I2 arcmin DEm Arcminute of Declination (J2000) 69- 70 I2 arcsec DEs Arcsecond of Declination (J2000) 72- 78 F7.1 mas/yr pmRA Proper motion in RA*cos(DE) (1) 80- 85 F6.1 mas/yr e_pmRA Error in pmRA (1) 86 A1 --- u_pmRA Uncertainty flag on pmRA 88- 94 F7.1 mas/yr pmDE Proper motion in DE (1) 96-101 F6.1 mas/yr e_pmDE Error in pmDE (1) 102 A1 --- u_pmDE Uncertainty flag on pmDE 104-110 A7 --- SpType MK spectral type 112-114 A3 --- n_Name Additional remark(s) (2)
Note (1): In units of milli-arcseconds per year. Note (2): Notes as follows: 1 = first proper motion measurement 2 = double detection in SSA 3 = high δµ/µ ratio 4 = proper motion from the literature.
History: From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 17-Oct-2009
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

catalogue service

© UDS/CNRS

Contact