J/PASP/117/676 LHS faint proper-motion stars (Reid+, 2005)
Probing the LHS catalog. II. Faint proper-motion stars.
Reid I.N., Gizis J.E.
<Publ. Astron. Soc. Pac., 117, 676-698 (2005)>
=2005PASP..117..676R 2005PASP..117..676R
ADC_Keywords: Stars, dwarfs ; Proper motions ; Parallaxes, trigonometric ;
Photometry, infrared
Abstract:
We present low-resolution spectroscopic observations of faint
proper-motion stars from the LHS Catalogue, concentrating on stars
with mr>16.5 and µ>0.5"/yr. The present paper includes
observations and spectral classifications for 294 M dwarfs,
M subdwarfs (sdM), and extreme M subdwarfs (esdM). We also identify
white dwarfs among the faintest LHS stars. We have cross-referenced
this sample against the Two Micron All Sky Survey (2MASS) sources, and
list data for the detected objects. We discuss stars of individual
interest, as well as the characteristics of the overall sample. As
expected, a significant number of the stars in this
proper-motion-selected sample are halo subdwarfs, including an esdM
dwarf, LHS 3481, that is likely to lie within 20pc of the Sun. None of
the subdwarfs show Hα emission.
Description:
The new observations described in this paper were obtained at a number
of facilities over the last decade. Most targets were observed with
the Double Spectrograph at the Hale 200 inch (5m) telescope between
1995 and 1999.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 106 257 Red dwarfs
table4.dat 98 39 White dwarfs
table6.dat 62 80 Parallax stars
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See also:
I/87B : LHS Catalogue, 2nd Edition (Luyten 1979)
I/279 : Revised Luyten Half-Second Catalogue (Bakos+ 2002)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 4 I4 --- LHS LHS number
5 A1 --- m_LHS Multiplicity index on LHS
7- 22 A16 --- 2MASSJ 2MASSJ designation (HHMMSSss+DDMMSSs)
24- 27 F4.1 mag rmag r magnitude
29- 33 F5.2 mag Jmag J magnitude
35- 39 F5.2 mag Hmag H magnitude
41- 45 F5.2 mag Ksmag Ks magnitude
47- 50 F4.2 --- CaH1 ?=- CaH1 index (1)
52- 55 F4.2 --- CaH2 CaH2 index (1)
57- 60 F4.2 --- CaH3 CaH3 index (1)
62- 65 F4.2 --- TiO5 TiO5 index (1)
67- 73 A7 --- SpType Spectral type
75- 80 F6.2 pc Dist Distance
82- 87 F6.3 mag JMAG Absolute J magnitude
89-106 A18 --- Com Comments (2)
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Note (1): Spectroscopic indices = F(W)/F(S1+S2):
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Band S1 W S2
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TiO5 7042-7046 7126-7135
CaH1 6345-6355 6380-6390 6410-6420
CaH2 7042-7046 6814-6846
CaH3 7042-7046 6960-6990
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Note (2): G97 = Gizis, 1997, Cat. J/AJ/113/805
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 4 I4 --- LHS LHS number
5 A1 --- m_LHS Multiplicity index on LHS
7- 22 A16 --- 2MASSJ 2MASSJ designation (HHMMSSss+DDMMSSs)
24- 27 F4.1 mag rmag r magnitude
29- 33 F5.2 mag Jmag ?=- J magnitude
35- 39 F5.2 mag Hmag ?=- H magnitude
41- 45 F5.2 mag Ksmag ?=- Ks magnitude
47- 51 A5 --- SpType Spectral type
53- 98 A46 --- Com Comments and reference
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Byte-by-byte Description of file: table6.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 4 I4 --- LHS LHS number
5 A1 --- m_LHS Multiplicity index on LHS
7- 22 A16 --- 2MASSJ 2MASSJ designation (HHMMSSss+DDMMSSs)
24- 30 A7 --- SpType Spectral type
32- 36 F5.2 mag JMAG Absolute J magnitude
38- 42 F5.2 mag HMAG Absolute H magnitude
44- 48 F5.2 mag KsMAG Absolute Ks magnitude
50- 55 F6.4 mas Plx Parallax
57- 62 F6.4 mas e_Plx rms uncertainty on Plx
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 21-Aug-2007