J/AJ/125/3302 HST binary very low mass stars and brown dwarfs (Gizis+, 2003)
Hubble Space Telescope observations of binary very low mass stars
and brown dwarfs.
Gizis J.E., Reid I.N., Knapp G.R., Liebert J., Kirkpatrick J.D.,
Koerner D.W., Burgasser A.J.
<Astron. J. 125, 3302 (2003)>
=2003AJ....125.3302G 2003AJ....125.3302G
ADC_Keywords: Stars, double and multiple ; Stars, dwarfs ; Photometry, infrared
Keywords: binaries: general - stars: low-mass, brown dwarfs
Abstract:
We present analysis of Hubble Space Telescope (HST) images of 82
nearby field late M and L dwarfs. We resolve 13 of these systems into
double M/L dwarf systems and identify an additional possible binary.
Description:
Targets for snapshot WFPC2 imaging with HST were chosen from the list
of 2MASS-selected late M dwarfs (Gizis et al., 2000AJ....120.1085G 2000AJ....120.1085G)
and L dwarfs (Kirkpatrick et al., 1999ApJ...519..802K 1999ApJ...519..802K,
2000AJ....120..447K 2000AJ....120..447K) and from late M and L dwarfs identified from the
initial regions covered by SDSS (Fan et al., 2000AJ....119..928F 2000AJ....119..928F;
Schneider et al., 2002AJ....123..458S 2002AJ....123..458S; Hawley et al., 2002, Cat.
J/AJ/123/3409). A few 2MASS and SDSS objects included have not yet
been described in publications.
File Summary:
--------------------------------------------------------------------------------
FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
table1.dat 101 82 Target Systems
table2.dat 103 14 Doubles
--------------------------------------------------------------------------------
See also:
J/AJ/123/3409 : SDSS M, L, and T dwarfs (Hawley+, 2002)
Byte-by-byte Description of file: table1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 25 A25 --- Name Object name
26 A1 --- n_Name [*] *: 2MASS object not yet described in
publication
28- 33 F6.3 mag Imag The I-band magnitude
35- 40 F6.3 mag Zmag ? The Z-band magnitude (1)
42- 47 F6.3 mag Jmag The J-band magnitude
49- 54 F6.3 mag Hmag The H-band magnitude
56- 61 F6.3 mag Ksmag The Ks band magnitude
63- 67 F5.3 mag e_Imag Error in Imag
69- 73 F5.3 mag e_Zmag ? Error in Zmag (1)
75- 79 F5.3 mag e_Jmag Error in Jmag
81- 85 F5.3 mag e_Hmag Error in Hmag
87- 91 F5.3 mag e_Ksmag Error in Ksmag
93- 97 F5.1 pc Dist Distance
99 I1 --- Num Number of stars in the system
101 A1 --- Ref Reference (2)
--------------------------------------------------------------------------------
Note (1): Some values are null because of cosmic-ray hits. It is possible
that low-level cosmic ray hits might also affect other targets,
especially the Z band.
Note (2): References are as follows:
a = Dahn et al., 2002AJ....124.1170D 2002AJ....124.1170D
b = Fan et al., 2000AJ....119..928F 2000AJ....119..928F
c = Gizis et al., 2000AJ....120.1085G 2000AJ....120.1085G
d = Hawley et al., 2002AJ....123.3409H 2002AJ....123.3409H, Cat. J/AJ/123/3409
e = Kirkpatrick et al., 1999ApJ...519..802K 1999ApJ...519..802K
f = Kirkpatrick et al., 2000AJ....120..447K 2000AJ....120..447K
g = Schenider et al., 2002AJ....123..458S 2002AJ....123..458S
h = K.L. Cruz 2002, private communication;
i = J.E. Gizis 2002, private communication;
j = J.D. Kirkpatrick 2002, private communication;
k = G.R. Knapp 2002, private communication;
l = C.G. Tinney & J.D. Kirkpatrick 2002, private communication;
m = J.C. Wilson & K.L. Cruz 2002, private communication.
--------------------------------------------------------------------------------
Byte-by-byte Description of file: table2.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 25 A25 --- Name Object name
27- 37 A11 --- OName Shorted name (2MHHMM+DDMM)
38 A1 --- n_Name [a] a: Candidate binary.
40- 45 F6.3 mag IAmag A component I-band magnitude
47- 52 F6.3 mag ZAmag ? A component Z-band magnitude
54- 58 F5.3 mag e_IAmag Error in IAmag
60- 64 F5.3 mag e_ZAmag ? Error in ZAmag
66- 71 F6.3 mag IBmag B component I-band magnitude
73- 78 F6.3 mag ZBmag ? B component Z-band magnitude
80- 84 F5.3 mag e_IBmag Error in IBmag
86- 90 F5.3 mag e_ZBmag ? Error in ZBmag
92- 94 I3 deg PA Position angle
96-100 F5.3 arcsec Sep Separation in arcsec
102-103 I2 AU SepAU Separation in AU
--------------------------------------------------------------------------------
History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Bauer [CDS] 26-Sep-2003