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J/ApJ/525/466 Young low-mass stars and brown dwarfs in IC 348 (Luhman+, 1999)

Young low-mass stars and brown dwarfs in IC 348 Luhman K.L. <Astrophys. J. 525, 466 (1999)> =1999ApJ...525..466L
ADC_Keywords: Photometry, infrared ; Spectroscopy ; Stars, late-type ; Clusters, open Keywords: infrared: stars - stars: evolution - stars: formation - stars: low-mass, brown dwarfs - stars: luminosity function, mass function - stars: pre-main-sequence Abstract: I present new results from a continuing program to identify and characterize the low-mass stellar and substellar populations in the young cluster IC 348 (0.5 - 10 Myr). Optical spectroscopy has revealed young objects with spectral types as late as M8.25. The intrinsic J-H and H-K colors of these sources are dwarflike, whereas the R-I and I-J colors appear intermediate between the colors of dwarfs and giants. Furthermore, the spectra from 6500 to 9500 Å are reproduced well with averages of standard dwarf and giant spectra, suggesting that such averages should be used in the classification of young late-type sources. Objects: -------------------------------------------------- RA (2000) DE Designation(s) -------------------------------------------------- 03 44.5 +32 17 IC 348 = OCl 409 = LBN 758 -------------------------------------------------- File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 147 70 Data for low-mass sources in IC 348
Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 3 I3 --- ID Identification number of IC 348 source 5 A1 --- f_ID [g] Indicates IR photometry includes a companion while the optical data resolve the two sources. 8 I1 h RAh Right Ascension (J2000) 10- 11 I2 min RAm Right Ascension (J2000) 13- 17 F5.2 s RAs Right Ascension (J2000) 18 A1 --- DE- Declination sign (J2000) 19- 20 I2 deg DEd Declination (J2000) 22- 23 I2 arcmin DEm Declination (J2000) 25- 28 F4.1 arcsec DEs Declination (J2000) 30- 35 A6 --- SpIR Spectral type from IR measurements 37- 48 A12 --- SpOpt Spectral type from optical measurements 49- 53 F5.1 0.1nm EqW ? Equivalent width of Hα 55- 56 I2 0.1nm e_EqW ? Error in EqW 59 A1 --- u_EqW [?] Indicates an uncertain EqW measurement 61- 64 A4 --- r_SpType Reference for SpType 66- 70 A5 --- SpType Adopted spectral type 72- 75 I4 K Teff Effective temperature (1) 77- 80 F4.2 mag Extinc Extinction in the J band 82- 86 F5.3 solLum Lbol Bolometric luminosity 88- 91 F4.2 mag (R-I)H ? (R-I) color from Herbig (1998ApJ...497..736H) 94- 98 F5.2 mag ImagH ? I band magnitude from Herbig 1998 100 A1 --- l_R-I Limit value for R-I 101-104 F4.2 mag R-I ? (R-I) color from this work 107-111 F5.2 mag Imag ? I band magnitude from this work 113-116 F4.2 mag (J-H)LL ? (J-H) color from Lada & Lada (1995AJ....109.1682L) 118-121 F4.2 mag (H-K)LL ? (H-k) color from Lada & Lada 1995 124-128 F5.2 mag KmagLL ? K band color from Lada & Lada 1995 131-134 F4.2 mag (J-H)L ? (J-H) color from Luhman et al (1998ApJ...508..347L) 137-140 F4.2 mag (H-K)L ? (H-k) color from Luhman et al 1998 143-147 F5.2 mag KmagL ? K band color from Luhman et al 1998
Note (1): Adopted spectral types converted to Teff with the dwarf temperature scale in Table 2
History: From ApJ electronic edition
(End) Greg Schwarz [AAS] 16-Mar-2000
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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