Access to Astronomical Catalogues

← Click to display the menu
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
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:
FileName Lrecl Records Explanations
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
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
Bytes Format Units Label Explanations
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
Byte-by-byte Description of file: table4.dat
Bytes Format Units Label Explanations
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
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.
Byte-by-byte Description of file: refs.dat
Bytes Format Units Label Explanations
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
Byte-by-byte Description of file: notes.dat
Bytes Format Units Label Explanations
1- 2 A2 --- Code Note code 4-144 A141 --- Note Text of the note
History: From electronic version of the journal References: Faherty et al. Paper II. 2010AJ....139..176F Faherty et al. Paper III. 2012ApJ...752...56F Cat. J/ApJ/752/56
(End) Greg Schwarz [AAS], Marianne Brouty [CDS] 21-Mar-2011
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

catalogue service

© UDS/CNRS

Contact