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J/A+A/503/639       NIR spectral of M-T dwarfs               (Testi, 2009)

A low-resolution near-infrared spectral library of M-, L-, and T-dwarfs. Testi L. <Astron. Astrophys. 503, 639 (2009)> =2009A&A...503..639T
ADC_Keywords: Stars, dwarfs ; Stars, late-type ; Spectra, infrared Keywords: stars: low-mass, brown dwarfs - stars: fundamental parameters - infrared: stars Abstract: We present complete near-infrared (0.85-2.45um), low-resolution (R∼100) spectra of a sample of 54 disk M-, L-, and T-dwarfs with reliable optical or near infrared spectral-type classification from the literature. The observations were obtained with a prism-based optical element, the Amici device, which provides a complete spectrum of the source on the detector. Our observations indicate that low-resolution near-infrared spectroscopy can be used to determine the spectral classification of late-type field dwarfs in a fast but accurate way. We derive a set of near-infrared spectral indices that are useful to the classification of field dwarfs not seriously affected by reddening. Finally, we show that the comparison of Amici spectra with model atmospheres allows us to obtain a reliable estimate of the dwarf effective temperatures File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file stars.dat 126 54 Observed M-, L-, and T-dwarfs sp/* 19 54 Individual spectra
See also: J/AJ/123/3409 : SDSS M, L, and T dwarfs (Hawley+, 2002) J/ApJ/564/421 : Spectra of T dwarfs. I. (Burgasser+, 2002) J/AJ/126/2487 : T dwarfs in the southern hemisphere (Burgasser+, 2003) J/AJ/127/3553 : JHK photometry and spectroscopy for L & T dwarfs (Knapp 2004) J/AJ/127/3553 : L and T dwarfs JHK photometry & spectroscopy (Knapp+, 2004) J/PASP/118/659 : RI photometry of 2MASS late M and L dwarfs (Liebert+, 2006) J/AJ/131/2722 : New L and T dwarfs from the SDSS (Chiu+, 2006) J/AJ/132/866 : New M dwarfs in solar neighborhood (Riaz+, 2006) J/ApJ/637/1067 : Near-IR spectral classification of T dwarfs (Burgasser+ 2006) J/ApJ/648/629 : Radio obs. of late M, L, and T dwarfs (Berger+, 2006) J/ApJ/651/502 : Spitzer IRAC photometry of M, L, and T dwarfs (Patten+, 2006) J/MNRAS/383/831 : New DENIS nearby L and late-M dwarfs (Phan-Bao+, 2008) Byte-by-byte Description of file: stars.dat
Bytes Format Units Label Explanations
1- 25 A25 --- Name Star name 27- 28 I2 h RAh Right ascension (J2000) 30- 31 I2 min RAm Right ascension (J2000) 33- 36 F4.1 s RAs Right ascension (J2000) 38 A1 --- DE- Declination sign (J2000) 39- 40 I2 deg DEd Declination (J2000) 42- 43 I2 arcmin DEm Declination (J2000) 45- 46 I2 arcsec DEs Declination (J2000) 48- 51 A4 --- SpType MK spectral type (1) 53- 62 A10 "DD/MM/YYYY" Obs.Date Observation date 64 I1 --- Ref [1/5] Reference (2) 66- 89 A24 --- SName Simbad name 91- 96 A6 --- Note Note 97-126 A30 --- FileName Name of the file containing the spectra in sp subdirectory
Note (1): For M- and L-dwarfs we list the optical spectral types (from the reference in column 4), for T-dwarfs we list the NIR spectral types (from Burgasser et al., 2004, Cat. J/AJ/127/2856) Note (2): References as follows: 1 = Burgasser et al. (2004, Cat. J/AJ/127/2856) 2 = Henry et al. (1994AJ....108.1437H) 3 = Kirkpatrick et al. (1995AJ....109..797K) 4 = Kirkpatrick et al. (1999ApJ...519..802K) 5 = Kirkpatrick et al. (2000AJ....120..447K)
Byte-by-byte Description of file: sp/*
Bytes Format Units Label Explanations
3- 8 F6.4 um lambda Wavelength 10- 19 F10.7 --- Flux Flux normalized to the average flux between 1.235 and 1.305um
Acknowledgements: Leonardo Testi, ltesti(at)eso.org
(End) Patricia Vannier [CDS] 22-Jun-2009
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

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