J/AJ/128/463 A preliminary 20pc census from the NLTT catalogue (Reid+, 2004)
Meeting the cool neighbors.
VIII. A preliminary 20 parsec census from the NLTT catalogue.
Reid I.N., Cruz K.L., Allen P., Mungall F., Kilkenny D., Liebert J.,
Hawley S.L., Fraser O.J., Covey K.R., Lowrance P., Kirkpatrick J.D.,
Burgasser A.J.
<Astron. J., 128, 463-483 (2004)>
=2004AJ....128..463R 2004AJ....128..463R
ADC_Keywords: Stars, nearby ; Parallaxes, trigonometric ; Photometry, infrared ;
Photometry, UBVRI
Keywords: stellar content - stars: low-mass, brown dwarfs -
stars: luminosity function, mass function
Abstract:
Continuing our census of late-type dwarfs in the solar neighborhood,
we present BVRI photometry and optical spectroscopy of 800 mid-type M
dwarfs drawn from the NLTT proper-motion catalog. The targets are
taken both from our own cross-referencing of the NLTT Catalogue and
the 2MASS Second Incremental Data Release, and from the revised NLTT
compiled recently by Salim & Gould (Cat. J/ApJ/582/1011). All are
identified as nearby-star candidates based on their location in the
(mr, mr-Ks) diagram. Three hundred stars discussed here have
previous astrometric, photometric, or spectroscopic observations. We
present new BVRI photometry for 101 stars, together with
low-resolution spectroscopy of a further 400 dwarfs.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 140 168 Known nearby stars from NLTT2 sample
table2.dat 140 151 Known nearby stars from NLTT3 sample
refs.dat 166 27 References
notes.dat 80 102 Notes
table3.dat 118 101 SAAO photometry of NLTT2 and NLTT3 stars
table4.dat 64 447 Narrowband indices for NLTT dwarfs
table5.dat 91 447 Astrometry and photometry of spectroscopic targets
table6.dat 112 71 Early-type M dwarfs from the revised NLTT:
Hipparcos stars
table7.dat 91 13 Early-type M dwarfs from the rNLTT
with no Hipparcos data
table8.dat 114 213 Additional stars in the 2MASS 2nd release 20parsec
sample
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See also:
I/98 : NLTT Catalogue (Luyten, 1979)
J/ApJ/582/1011 : Revised NLTT Catalog (rNLTT, Salim+, 2003)
J/AJ/123/2806 : Nearby stars in the NLTT catalogue (Reid+, 2002)
J/AJ/123/2822 : Photometry of southern NLTT stars (Reid+, 2002)
J/AJ/123/2828 : Spectroscopy of northern NLTT stars (Cruz+, 2002)
J/AJ/126/2421 : 2MASS-Selected sample of ultracool dwarfs (Cruz+, 2003)
J/AJ/126/2449 : Nearby ultracool dwarfs in galactic plane (Reid+, 2003)
J/AJ/126/3007 : Spectroscopy of faint red NLTT dwarfs (Reid+, 2003)
J/AJ/130/1680 : LSPM-North proper-motion catalog nearby stars (Lepine+, 2005)
Byte-by-byte Description of file: table[12].dat
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Bytes Format Units Label Explanations
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1- 12 A12 --- Name NLTT Catalogue name (G1)
13- 14 A2 --- f_Name Flag on Name (G2)
16- 26 A11 --- OName Other name (G3)
28- 29 I2 h RAh 2MASS hour of right ascension (J2000)
31- 32 I2 min RAm 2MASS minute of right ascension (J2000)
34- 37 F4.1 s RAs 2MASS second of right ascension (J2000)
39 A1 --- DE- 2MASS sign of the declination (J2000)
40- 41 I2 deg DEd 2MASS degree of declination (J2000)
43- 44 I2 arcmin DEm 2MASS arcminute of declination (J2000)
46- 47 I2 arcsec DEs 2MASS arcsecond of declination (J2000)
49- 52 F4.1 mag rmag Luyten r-band magnitude
54- 58 F5.2 mag Jmag 2MASS J-band magnitude
60- 64 F5.2 mag Hmag 2MASS H-band magnitude
66- 70 F5.2 mag Ksmag 2MASS Ks band magnitude
72- 76 F5.2 mag Vmag ? The V-band magnitude
77 A1 --- u_Vmag [:] Uncertainty flag on Vmag
79- 82 F4.2 mag B-V ? The (B-V) color index
83 A1 --- u_B-V [:] Uncertainty flag on B-V
85- 89 F5.2 mag V-Rc ? The (V-Rc) color index
91- 94 F4.2 mag V-Ic ? The (V-Ic) color index
96- 97 I2 --- r_Vmag [0/20]? Optical photometry source
99-105 F7.3 mas plx ? Trigonometric parallax
107-108 I2 mas e_plx ? Uncertainty in plx
110-111 I2 --- r_plx ? Reference for plx
113-116 A4 --- SpType MK spectral type
118-122 F5.2 mag m-M Estimated distance modulus
124-127 F4.2 mag e_m-M Uncertainty in m-M
129-133 F5.2 mag JMAG Absolute 2MASS J-band magnitude
135-140 A6 --- Note Additional comments (see file notes.dat)
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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- 2 I2 --- Ref Reference number
4- 22 A19 --- Bibcode Bibcode
24- 41 A18 --- Aut Author's name
43-166 A124 --- Com Comments
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Byte-by-byte Description of file: notes.dat
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Bytes Format Units Label Explanations
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1- 2 I2 --- Note Note number
4- 80 A77 --- Text Text of Comments
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 4 A4 --- --- [NLTT]
5 A1 --- n_Name [123] NLTT candidate list
7- 17 A11 --- Name NLTT Catalogue name (G1)
19- 20 A2 --- f_Name Flag on Name (G2)
22- 31 A10 --- OName Other name (1)
33- 34 I2 h RAh 2MASS hour of right ascension (J2000)
36- 37 I2 min RAm 2MASS minute of right ascension (J2000)
39- 42 F4.1 s RAs 2MASS second of right ascension (J2000)
44 A1 --- DE- 2MASS sign of the declination (J2000)
45- 46 I2 deg DEd 2MASS degree of declination (J2000)
48- 49 I2 arcmin DEm 2MASS arcminute of declination (J2000)
51- 52 I2 arcsec DEs 2MASS arcsecond of declination (J2000)
54- 57 F4.1 mag rmag Luyten r-band magnitude
59- 63 F5.2 mag Jmag 2MASS J-band magnitude
65- 69 F5.2 mag Hmag 2MASS H-band magnitude
71- 75 F5.2 mag Ksmag 2MASS Ks band magnitude
77- 81 F5.2 mag Vmag The V-band magnitude
83- 86 F4.2 mag B-V ? The (B-V) color index
88- 91 F4.2 mag V-Rc The (V-Rc) color index
93- 96 F4.2 mag V-Ic The (V-Ic) color index
98 I1 --- NObs Number of observations
100-104 F5.2 mag m-M Estimated distance modulus
106-109 F4.2 mag e_m-M Uncertainty in m-M
111-114 F4.2 mag JMAG Absolute 2MASS J-band magnitude
116-117 I2 --- Note ? Additional comments (see file notes.dat)
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Note (1): Usually from either the CNS3 (Cat. V/70) or the LHS Catalogue
(Cat. I/279).
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
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1- 4 A4 --- --- [NLTT]
5 A1 --- n_Name [123] NLTT candidate list
7- 18 A12 --- Name NLTT Catalogue name (G1)
20- 23 F4.2 --- TiO5 F(7126-7135Å)/F(7042-7046Å)
25- 28 F4.2 --- CaOH ?F(6230-6240Å)/F(6345-6354Å)
30- 33 F4.2 --- CaH1 ?F(6380-6390Å)/F(6345-6355Å+6410-6430Å)
35- 38 F4.2 --- CaH2 F(6814-6846Å)/F(7042-7046Å)
40- 43 F4.2 --- CaH3 F(6960-6990Å)/F(7042-7046Å)
45- 48 F4.2 --- TiO-a F(7033-7048Å)/F(7058-7073Å)
50- 53 F4.2 --- VO-a F(7350-7370Å+7550-7570Å)/F(7430-7470Å)
55- 58 F4.2 --- Halpha Hα index F(6560-6566Å)/F(6545-6555Å)
60- 63 A4 --- SpType MK Spectral type
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Byte-by-byte Description of file: table5.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 4 A4 --- --- [NLTT]
5 A1 --- n_Name [123] NLTT candidate list
7- 18 A12 --- Name NLTT Catalogue name (G1)
23- 24 A2 --- f_Name Flag on Name (G2)
26- 27 I2 h RAh Hour of right ascension (J2000)
29- 30 I2 min RAm Minute of right ascension (J2000)
32- 35 F4.1 s RAs Second of right ascension (J2000)
37 A1 --- DE- Sign of the declination (J2000)
38- 39 I2 deg DEd Degree of declination (J2000)
41- 42 I2 arcmin DEm Arcminute of declination (J2000)
44- 45 I2 arcsec DEs Arcsecond of declination (J2000)
47- 50 F4.1 mag rmag Luyten r-band magnitude
51 A1 --- u_rmag [:] Uncertainty flag on rmag
53- 58 F6.3 mag Jmag 2MASS-2nd J-band magnitude
60 A1 --- f_Jmag [1] Flag on Jmag (3)
62- 67 F6.3 mag Hmag 2MASS-2nd H-band magnitude
69- 74 F6.3 mag Ksmag 2MASS-2nd Ks band magnitude
76- 80 F5.2 mag JMAG 2MASS-2nd absolute J-band magnitude
82- 86 F5.1 pc Dist Distance
88- 91 F4.1 pc e_Dist Uncertainty in Dist
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Note (3): Flag on Jmag:
1 = Star with JHKs from the 2MASS All-Sky Data Release.
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Byte-by-byte Description of file: table6.dat
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Bytes Format Units Label Explanations
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1- 5 I5 --- rNLTT NLTT Catalogue number
7- 17 A11 --- Name NLTT Catalogue name
19- 24 I6 --- HIP Hipparcos Catalogue number
26- 27 I2 h RAh Hour of right ascension (J2000)
29- 30 I2 min RAm Minute of right ascension (J2000)
32- 36 F5.2 s RAs Second of right ascension (J2000)
38 A1 --- DE- Sign of the declination (J2000)
39- 40 I2 deg DEd Degree of declination (J2000)
42- 43 I2 arcmin DEm Arcminute of declination (J2000)
45- 48 F4.1 arcsec DEs Arcsecond of declination (J2000)
50- 54 F5.2 mag Vmag The rNLTT V-band magnitude
56- 60 F5.3 mag Jmag 2MASS J-band magnitude
62- 66 F5.3 mag Hmag 2MASS H-band magnitude
68- 72 F5.3 mag Ksmag 2MASS Ks band magnitude
74- 78 F5.1 mas plx Hipparcos parallax
80- 83 F4.1 mas e_plx Uncertainty in plx
85- 92 A8 mag JMAG Absolute 2MASS J-band magnitude
94-105 A12 --- Comm Additional comments
107-112 A6 --- Note Note number (see file notes.dat)
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Byte-by-byte Description of file: table7.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 5 I5 --- rNLTT NLTT number
7- 16 A10 --- Name Name
18- 19 I2 h RAh Hour of right ascension (J2000)
21- 22 I2 min RAm Minute of right ascension (J2000)
24- 28 F5.2 s RAs Second of right ascension (J2000)
30 A1 --- DE- Sign of the declination (J2000)
31- 32 I2 deg DEd Degree of declination (J2000)
34- 35 I2 arcmin DEm Arcminute of declination (J2000)
37- 41 F5.2 arcsec DEs Arcsecond of declination (J2000)
42- 50 A9 mag Vmag V magnitude
52- 56 F5.3 mag Jmag J magnitude
58- 62 F5.3 mag Hmag H magnitude
64- 68 F5.3 mag Ksmag Ks magnitude
70- 71 I2 mas plx Trigonometric parallax
73- 74 I2 mas e_plx Error in plx
76- 84 A9 mag JMAG Absolute J magnitude
86- 91 A6 --- Note Additional comments (see file notes.dat)
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Byte-by-byte Description of file: table8.dat
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Bytes Format Units Label Explanations
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1- 19 A19 --- Comm Comment about the origin
21- 32 A12 --- Name Object name
34- 35 A2 --- --- [2M]
36- 49 A14 --- 2MASS 2MASS identification number (HHMMSSs+DDMMSS)
51- 55 F5.2 mag Vmag The V-band magnitude
57- 61 F5.2 mag Jmag The J-band magnitude
63- 66 F4.2 mag e_Jmag Uncertainty in Jmag
68- 72 F5.2 mag Hmag The H-band magnitude
74- 77 F4.2 mag e_Hmag Uncertainty in Hmag
79- 83 F5.2 mag Ksmag The Ks band magnitude
85- 88 F4.2 mag e_Ksmag Uncertainty in Ksmag
90- 93 A4 --- SpType MK Spectral type (1)
95- 99 F5.2 mag m-M Distance modulus
101-104 F4.2 mag e_m-M Uncertainty in m-M
106-114 A9 --- Note Additional comments (see file notes.dat)
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Note (1): Spectral types are taken from the PMSU for M dwarfs, and from
either the CNS3 (Cat. V/70) or SIMBAD for earlier-type stars.
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Global Notes:
Note (G1): We have added Lowell Observatory Proper Motion Survey
identifications (Giclas et al. 1971, Cat. I/79) where appropriate.
R = Ross;
W = Wolf;
Oxf = Oxford catalog.
Note (G2): Flag on Name, defined as follows:
** = Star with formal distance estimate d≤20pc;
* = Star with formal distance estimate within 1σ of 20pc.
Note (G3): Usually from either the CNS3 (Cat. V/70) or the LHS Catalogue
(Cat. I/279).
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History:
From electronic version of the journal
References:
Reid & Cruz, Paper I, 2002AJ....123.2806R 2002AJ....123.2806R, Cat. J/AJ/123/2806
Reid et al., Paper II, 2002AJ....123.2822R 2002AJ....123.2822R, Cat. J/AJ/123/2822
Cruz & Reid, Paper III, 2002AJ....123.2828C 2002AJ....123.2828C, Cat. J/AJ/123/2828
Reid et al., Paper IV, 2003AJ....125..354R 2003AJ....125..354R
Cruz et al., Paper V, 2003AJ....126.2421C 2003AJ....126.2421C, Cat. J/AJ/126/2421
Reid, Paper VI, 2003AJ....126.2449R 2003AJ....126.2449R, Cat. J/AJ/126/2449
Reid et al., Paper VII, 2003AJ....126.3007R 2003AJ....126.3007R, Cat. J/AJ/126/3007
Cruz et al., Paper IX, 2007AJ....133..439C 2007AJ....133..439C, Cat. J/AJ/133/439
Reid et al., Paper X, 2008AJ....136.1290R 2008AJ....136.1290R, Cat. J/AJ/136/1290
Reid et al., Paper XI, 2007AJ....133.2825R 2007AJ....133.2825R, Cat. J/AJ/133/2825
Cruz et al., Paper XII, 2018AJ....155...34C 2018AJ....155...34C
(End) Greg Schwarz [AAS], Marianne Brouty [CDS] 04-Oct-2005