J/AJ/133/2825 Star beyond the NLTT catalog (Reid+, 2007)
Meeting the cool neighbors. XI. Beyond the NLTT catalog.
Reid I.N., Cruz K.L., Allen P.R.
<Astron. J., 133, 2825-2840 (2007)>
=2007AJ....133.2825R 2007AJ....133.2825R
ADC_Keywords: Stars, nearby ; Proper motions ; Photometry, infrared ;
Spectroscopy
Keywords: Galaxy: stellar content - solar neighborhood - stars: distances -
stars: late-type
Abstract:
We have combined near-infrared data from the Two Micron All Sky Survey
with ancillary optical data to identify previously unrecognized
proper-motion stars that have colors and magnitudes consistent with
nearby M dwarfs. We present follow-up observations of 392 stars from
that sample, including ∼200 stars discussed here for the first time.
Our distance estimates, based primarily on spectroscopic parallaxes,
place 123 stars within 20pc of the Sun. One hundred and seventy-six
stars exhibit Hα emission, and 82 stars have plausible X-ray
counterparts from ROSAT observations.
Description:
We have collected spectroscopic observations of 415 of the 463 stars
on our target list. Observations of stars in the Moving M sample were
obtained in conjunction with follow-up spectroscopy of nearby-star
candidates from the NLTT catalog (Papers I (J/AJ/123/2806), III
(J/AJ/123/2828), VII (J/AJ/126/3007), and VIII (J/AJ/128/463)) and
from our ultracool survey (Papers V (J/AJ/126/2421) and IX
(J/AJ/133/439)). All observations were made using NOAO facilities,
either the 1.5m telescope at Cerro Tololo Inter-American Observatory
(CTIO) or the 2.1m at Kitt Peak National Observatory (KPNO).
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 158 150 Spectroscopy of previously catalogued stars
table3.dat 122 244 Spectroscopy of additional nearby star candidates
table4.dat 102 178 Chromospheric and coronal activity
notes.dat 80 65 Notes
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See also:
II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 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/128/463 : A preliminary 20pc census from NLTT catalogue (Reid+, 2004)
J/AJ/133/439 : Luminosity function of M7-L8 ultracool dwarfs (Cruz+, 2007)
J/AJ/136/1290 : Ultracool dwarfs from the 2MASS (Reid+, 2008)
Byte-by-byte Description of file: table2.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1 A1 --- d20 [<>] Distance <20pc (<) or beyond (>)
3- 20 A18 --- Name Star name
22 A1 --- n_d20 [*] Star close to 20pc (G1)
24- 25 I2 h RAh Hour of Right Ascension (J2000)
27- 28 I2 min RAm Minute of Right Ascension (J2000)
30- 33 F4.1 s RAs Second of Right Ascension (J2000)
35 A1 --- DE- Sign of the Declination (J2000)
36- 37 I2 deg DEd Degree of Declination (J2000)
39- 40 I2 arcmin DEm Arcminute of Declination (J2000)
42- 43 I2 arcsec DEs Arcsecond of Declination (J2000)
45- 49 F5.2 mag Jmag 2MASS J band magnitude
51- 55 F5.2 mag Hmag 2MASS H band magnitude
57- 61 F5.2 mag Kmag 2MASS KS band magnitude
63- 68 F6.3 mag Rmag ?=99.900 GSC2.2 RF band magnitude
70- 75 F6.3 arcsec/yr pmRA ? Proper motion in Right Ascension
77- 82 F6.3 arcsec/yr pmDE ? Proper motion in Declination
84- 88 F5.3 --- TiO5 ? The TiO5 index, F(7126-7135)/F(7042-7046)
90- 94 F5.3 --- CaH2 ? The CaH2 index, F(6814-6846)/F(7042-7046)
96-100 F5.3 --- CaH3 ? The CaH3 index, F(6960-6990)/F(7042-7046)
102-106 F5.3 --- VO-a ? The VO-a index,
F(7350-7370+7550-7570)/F(7430-7470)
108-113 A6 --- SpT Spectral type
115-120 F6.2 pc Dist Heliocentric distance
121 A1 --- u_Dist Uncertainty flag on Dist
123-127 F5.2 mag JMAG Absolute J band magnitude
129-132 F4.2 mag e_JMAG The 1σ error in JMAG
134-143 A10 --- OName Other name
145-158 A14 --- Note Additional notes, in notes.dat file
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Byte-by-byte Description of file: table3.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1 A1 --- d20 [<>] Distance <20pc (<) or beyond (>)
3- 4 I2 h RAh Hour of Right Ascension (J2000)
6- 7 I2 min RAm Minute of Right Ascension (J2000)
9- 12 F4.1 s RAs Second of Right Ascension (J2000)
14 A1 --- DE- Sign of the Declination (J2000)
15- 16 I2 deg DEd Degree of Declination (J2000)
18- 19 I2 arcmin DEm Arcminute of Declination (J2000)
21- 22 I2 arcsec DEs Arcsecond of Declination (J2000)
24 A1 --- n_d20 [*12] Note (G1)
26- 30 F5.2 mag Jmag 2MASS J band magnitude
32- 36 F5.2 mag Hmag 2MASS H band magnitude
38- 42 F5.2 mag Kmag 2MASS KS band magnitude
44- 48 F5.2 mag Rmag ?=99.90 GSC2.2 RF band magnitude
50- 54 F5.3 --- TiO5 The TiO5 index, F(7126-7135)/F(7042-7046)
56- 60 F5.3 --- CaH2 The CaH2 index, F(6814-6846)/F(7042-7046)
62- 66 F5.3 --- CaH3 The CaH3 index, F(6960-6990)/F(7042-7046)
68- 72 F5.3 --- VO-a The VO-a index,
F(7350-7370+7550-7570)/F(7430-7470)
74- 80 A7 --- SpT Spectral type
82- 86 F5.1 pc Dist Distance
88- 92 F5.2 mag JMAG Absolute J band magnitude
94- 97 F4.2 mag e_JMAG The 1σ error in JMAG
99-104 F6.3 arcsec/yr pmRA ? Proper motion in Right Ascension (3)
106-111 F6.3 arcsec/yr pmDE ? Proper motion in Declination (3)
113-122 A10 --- Com Additional comments (4)
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Note (3): Proper motions are taken from the USNOB1.0 Catalog
(Monet et al. 2002; 2003, Cat. I/284) except for stars from the
LSPM (I/298) survey.
Note (4): Codes as follows:
LSR = star is catalogued in the LSPM proper motion survey
(Lepine & Shara, 2005, Cat. I/298).
1RXS = star with ROSAT X-ray data.
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Byte-by-byte Description of file: table4.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1 A1 --- d20 [<>I] Distance <20pc (<) or beyond (>), or
I for inactive star.
3- 4 A2 --- --- [2M]
5- 14 A10 --- 2M Truncated 2MASS name (HHMM+DDMMA)
16 A1 --- n_d20 [*] Star close to 20pc (G1)
18 A1 --- l_EW Limit flag on EW
19- 23 F5.2 0.1nm EW ? Hα equivalent width in Angstroms
25 A1 --- l_logHa Limit flag on logf
26- 31 F6.2 [mW/m2] logHa ? Log of Hα flux in erg/cm2/s
33- 37 F5.2 [-] logHa/bol ? Log of Hα/bolometric fluxes
39- 43 F5.2 mag bolmag Bolometric magnitude
45- 50 F6.2 [mW/m2] logX ? Log of X-ray flux in erg/cm2/s
52- 56 F5.2 --- HR1 ? First hardness ratio (3)
58- 62 F5.2 --- HR2 ? Second hardness ratio (3)
64- 68 F5.2 [-] logX/bol ? Log of X-Ray/bolometric fluxes
69 A1 --- f_logX/bol Remark related to X-ray (4)
71- 86 A16 --- 1RXS ROSAT Bright Source catalog identification
88-102 A15 --- Note Additional notes (5)
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Note (3): The ROSAT hardness ratios are defined as HR=(H-S)/(H+S), where H
and S are the source counts in, respectively, the hard and soft
passbands. In the case of HR1, H covers 0.5-2.0keV and S spans
0.1-0.4keV; for HR2, the hard passband spans 0.9-2.0keV and the soft
0.5-0.9keV.
Note (4): Flag on logX/bol as follows:
? = HR1>0.2.
W = the positional offset, Δ, between the 2MASS and ROSAT
exceeds 1 arcminute.
Note (5): LSR indicates stars listed in the LSPM-North
(Lepine & Shara, 2005, Cat. I/298)
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Byte-by-byte Description of file: notes.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 3 A3 --- Note Note code
5- 80 A76 --- Text Text of the note
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Global notes:
Note (G1): Note as follows:
* = star with a formal distance estimates within 1σ of 20pc.
1 = 2M1951-4025 has a resolved companion, ∼1 arcsecond separation,
spectral type M4, ∼2.5 magnitudes fainter in the R band.
2 = 2M2049-2800 has CaH2/CaH3 band strengths suggestive of sub-solar
metallicities; the absolute magnitude estimate has been adjusted
accordingly.
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History:
From electronic version of the journal
21-Jan-2019: LP 772-14 has been modified for LP 772-15 in Table 2
thanks to Erik Mamajek report.
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, Cat. J/AJ/125/354
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
Reid et al., Paper VIII 2004AJ....128..463R 2004AJ....128..463R, Cat. J/AJ/128/463
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
Cruz et al., Paper XII 2018AJ....155...34C 2018AJ....155...34C
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 30-May-2009