J/AJ/137/1 Proper motions and astrometry of late-type dwarfs (Faherty+, 2009)
The brown dwarf kinematics project.
I. Proper motions and tangential velocities for a large sample of late-type M,
L, and T dwarfs.
Faherty J.K., Burgasser A.J., Cruz K.L., Shara M.M., Walter F.M.,
Gelino C.R.
<Astron. J., 137, 1-18 (2009)>
=2009AJ....137....1F 2009AJ....137....1F
ADC_Keywords: Positional data ; Proper motions ; Stars, dwarfs
Keywords: astrometry - stars: fundamental parameters -
stars: low-mass, brown dwarfs
Abstract:
We report proper-motion measurements for 427 late-type M, L, and T
dwarfs, 332 of which have been measured for the first time. Combining
these new proper motions with previously published measurements yields
a sample of 841 M7-T8 dwarfs. We combined parallax measurements or
calculated spectrophotometric distances, and computed tangential
velocities for the entire sample.
Description:
For the northern targets the 1.3m telescope at the MDM observatory
with the TIFKAM IR imager in the J band was used. For the southern
targets the 0.9m and 1.5m telescopes at the Cerro Tololo
Inter-American Observatory (CTIO) with the CFIM optical imager in the
I band and the CPAPIR wide-field IR imager in J band (respectively)
were used. The CTIO data were acquired through queue observing on 11
nights in 2007 March, September, and December, and standard user
observing on nine nights in 2008 January. The MDM targets were imaged
on five nights in 2007 November and seven nights in 2008 April.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table3.dat 101 425 New Proper Motion Measurements
table4.dat 193 853 Full Astrometric Database
refs.dat 183 157 References
notes.dat 144 34 Notes
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See also:
J/A+A/338/1066 : Optical Spectra of DENIS Brown Dwarf Candidate
(Tinney+ 1998)
J/MNRAS/383/831 : New DENIS nearby L and late-M dwarfs (Phan-Bao+, 2008)
J/AJ/133/2258 : Activity and kinematics of ultracool dwarfs (Schmidt+ 2007)
J/A+A/468/163 : Sample of low mass stars with mu>0.1"/yr (Deacon+, 2007)
J/AJ/133/439 : Luminosity function of M7-L8 ultracool dwarfs (Cruz+, 2007)
J/MNRAS/384/1399 : Proper motions of field L and T dwarfs (Jameson+, 2008)
J/AJ/126/2487 : T dwarfs in the southern hemisphere (Burgasser+, 2003)
Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 29 A29 --- Name Source name
31- 32 I2 h RAh Hour of Right Ascension (J2000)
34- 35 I2 min RAm Minute of Right Ascension (J2000)
37- 41 F5.2 s RAs Second of Right Ascension (J2000)
43 A1 --- DE- Sign of the Declination (J2000)
44- 45 I2 deg DEd Degree of Declination (J2000)
47- 48 I2 arcmin DEm Arcminute of Declination (J2000)
50- 53 F4.1 arcsec DEs Arcsecond of Declination (J2000)
55- 58 A4 --- SpTo Object optical spectral type
60- 63 A4 --- SpTi Object near-IR spectral type
65- 70 F6.3 arcsec/yr pmRA Proper motion in Right Ascension * cos(DE)
72- 76 F5.3 arcsec/yr e_pmRA Uncertainty in pmRA
78- 83 F6.3 arcsec/yr pmDE Proper motion in Declination
85- 89 F5.3 arcsec/yr e_pmDE Uncertainty in pmDE
91- 94 F4.1 yr Base Proper motion baseline
96-101 A6 --- Inst Instrument
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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- 29 A29 --- Name Source name
31- 33 I3 --- r_Name Discovery reference key
35- 36 I2 h RAh Hour of Right Ascension (J2000) at Epoch
38- 39 I2 min RAm Minute of Right Ascension (J2000) at Epoch
41- 45 F5.2 s RAs Second of Right Ascension (J2000) at Epoch
47 A1 --- DE- Sign of the Declination (J2000) at Epoch
48- 49 I2 deg DEd Degree of Declination (J2000) at Epoch
51- 52 I2 arcmin DEm Arcminute of Declination (J2000) at Epoch
54- 57 F4.1 arcsec DEs Arcsecond of Declination (J2000) at Epoch
59 A1 --- l_Jmag Limit flag on Jmag
60- 64 F5.2 mag Jmag ? 2MASS J band magnitude
66- 69 F4.2 mag e_Jmag ? Uncertainty in Jmag
71 A1 --- n_Jmag [a-d] Origin of Jmag
73 A1 --- l_Kmag Limit flag on Kmag
74- 79 F6.3 mag Kmag 2MASS Ks band magnitude
80- 85 F6.3 mag e_Kmag ? Uncertainty in 2MASS Kmag
87 A1 --- n_Kmag [a-d] Origin of Kmag
89- 95 F7.4 arcsec/yr pmRA Proper motion in Right Ascension,
pmRA*cos(DE)
97-102 F6.4 arcsec/yr e_pmRA ? Uncertainty in pmRA
104-110 F7.4 arcsec/yr pmDE Proper motion in Declination
112-117 F6.4 arcsec/yr e_pmDE ? Uncertainty in pmDE
119-121 I3 --- r_pmDE Reference for the proper motion
123-129 A7 --- SpTo Object optical spectral type
131-134 A4 --- SpTi Object near-IR spectral type
136-141 F6.2 pc Dist Heliocetrnic distance
143-146 F4.2 pc e_Dist ? Uncertainty in Dist
148-149 A2 --- n_Dist Origin of Dist (see file "notes.dat")
152-156 F5.1 km/s Vtan Tangential velocity
158-161 F4.1 km/s e_Vtan ? Uncertainty in Vtan
163-186 A24 --- Note Additional notes (1)
188-193 F6.1 yr Epoch ? Observation epoch
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Note (1): Additional notes, defined as follows:
VLMC = wide, very low mass companion;
UBL = Unusually Blue L dwarf;
LG = low surface-gravity dwarf;
YC = dwarf linked to a young cluster;
CB = close binary unresolved in 2MASS.
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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- 3 I3 --- Ref Reference number
4 A1 --- f_Ref [B] Flag on Ref
5- 23 A19 --- Bibcode Bibcode
25- 53 A29 --- Aut Author's name
55-183 A129 --- Com Comment
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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 A2 --- Code Note code
4-144 A141 --- Note Text of the note
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History:
From electronic version of the journal
References:
Faherty et al. Paper I. 2009AJ....137....1F 2009AJ....137....1F This catalog
Faherty et al. Paper II. 2010AJ....139..176F 2010AJ....139..176F
Faherty et al. Paper III. 2012ApJ...752...56F 2012ApJ...752...56F Cat. J/ApJ/752/56
Burgasser et al. Paper IV. 2015ApJS..220...18B 2015ApJS..220...18B Cat. J/ApJS/220/18
Hsu et al. Paper V. 2021ApJS..257...45H 2021ApJS..257...45H Cat. J/ApJS/257/45
Hsu et al. Paper VI. 2024ApJS..274...40H 2024ApJS..274...40H Cat. J/ApJS/274/40
(End) Greg Schwarz [AAS], Marianne Brouty [CDS] 21-Mar-2011