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J/A+A/376/982       Near-IR observations of young binaries       (Woitas+, 2001)

Mass ratios of the components in T Tauri binary systems and implications for multiple star formation Woitas J., Leinert C., Koehler R. <Astron. Astrophys. 376, 982 (2001)> =2001A&A...376..982W
ADC_Keywords: Stars, double and multiple ; Stars, pre-main sequence ; Infrared sources ; Photometry Keywords: binaries: general - stars: pre-main sequence - stars: formation - stars: fundamental parameters - techniques: interferometric - infrared: stars Description: Using near-infrared speckle interferometry we have obtained resolved JHK-photometry for the components of 58 young binary systems. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file stars.dat 70 75 Star positions (from Simbad) tablea1.dat 87 171 Spatially resolved observations of young T Tauri binary systems obtained by the authors tablea2.dat 68 144 NIR photometry for components of young binary systems figb1p1.ps 76 1717 *Color-magnitude diagram, part 1 figb1p2.ps 76 1700 Color-magnitude diagram, part 2 figb1p3.ps 76 1500 Color-magnitude diagram, part 3 figc1p1.ps 76 2012 *HR diagram, part 1 figc1p2.ps 76 1983 HR diagram, part 2 figc1p3.ps 76 2009 HR diagram, part 3 figc1p4.ps 76 2016 HR diagram, part 4 figc1p5.ps 76 2028 HR diagram, part 5 figc1p6.ps 76 2026 HR diagram, part 6 figc1p7.ps 76 1987 HR diagram, part 7 figc1p8.ps 76 1891 HR diagram, part 8
Note on figb1p1.ps: Components of WTTS systems placed into NIR color-magnitude diagrams together with the PMS model by D'Antona & Mazzitelli (1998, ASP Conference Series, vol. 134, p. 442). The dashed lines denote evolutionary tracks for masses from 0.02 to 0.9M, the solid lines are isochrones for ages 7x104, 105, 2x105, 3x105, 5x105, 7x105, 106, 2x106, 3x106, 5x106, 7x106, 107, 2x107, 3x107, 5x107, 108yr (MS). Note on figc1p1.ps: Components of T Tauri binary systems placed into the HR diagram as described in Sect. 5. The cross gives the position of the primary, the horizontal dashed lines give the locus for the companion and the respective error. The PMS model from Baraffe et al. (1998, Cat. J/A+A/337/403) is also indicated. Evolutionary tracks are plotted for masses of 0.04, 0.06, 0.08 (bold), 0.10, 0.15, 0.20, 0.30, 0.40, 0.50, 0.60, 0.70, 0.80, 1.0 and 1.2M, the isochrones denote ages of 1, 2, 5, 10, 20, 50 and 90Myr.
See also: II/225 : Catalog of Infrared Observations, Edition 5 (Gezari+ 1999) Byte-by-byte Description of file: stars.dat
Bytes Format Units Label Explanations
1- 17 A17 --- Name Star name 19- 20 I2 h RAh Right ascension (J2000) 22- 23 I2 min RAm Right ascension (J2000) 25- 28 F4.1 s RAs Right ascension (J2000) 30 A1 --- DE- Declination sign (J2000) 31- 32 I2 deg DEd Declination (J2000) 34- 35 I2 arcmin DEm Declination (J2000) 37- 38 I2 arcsec DEs Declination (J2000) 40- 49 A10 --- FileCMD Name of the figure containing the color-magnitude diagram 51- 60 A10 --- FileHR Name of the figure containing the HR diagram 62- 70 A9 --- Com Comment
Byte-by-byte Description of file: tablea1.dat
Bytes Format Units Label Explanations
1- 17 A17 --- Name (most common) System name 18- 19 A2 --- m_Name Multiplicity index on Name 21 A1 --- Filt [JHK] Filter name 23- 32 A10 "DD/MM/YYYY" ObsDate Observation date 34- 38 F5.3 --- I2/I1 ? Flux ratio I(2)/I(1), '1' denotes the brighter component in K 40- 44 F5.3 --- e_I2/I1 ? Error of Flux ratio 47- 51 F5.2 mag mag ? Magnitude of system (primary and secondary combined) 53- 56 F4.2 mag e_mag ? Error of system magnitude 58- 62 F5.2 mag mag1 ? Magnitude of primary 64- 67 F4.2 mag e_mag1 ? Error of primary magnitude 69- 73 F5.2 mag mag2 ? Magnitude of secondary 75- 78 F4.2 mag e_mag2 ? Error of secondary magnitude
Byte-by-byte Description of file: tablea2.dat
Bytes Format Units Label Explanations
1- 17 A17 --- Name (most common) System name 19 A1 --- m_Name Designation of companion 21 A1 --- l_Jmag Limit flag on Jmag 22- 26 F5.2 mag Jmag ? J magnitude (1) 28- 31 F4.2 mag e_Jmag ? Error of J magnitude 33 A1 --- l_Hmag Limit flag on Hmag 34- 38 F5.2 mag Hmag H magnitude (1) 40- 43 F4.2 mag e_Hmag ? Error of H magnitude 45- 49 F5.2 mag Kmag K magnitude (1) 51- 54 F4.2 mag e_Kmag ? Error of K magnitude 56- 59 F4.2 --- Av ? Interstellar extinction coefficient (2) 61- 65 A5 --- SpType System spectral type (2) 67 I1 --- SFR [1/4]? Index of star forming region (3)
Note (1): The values given here are the mean of all spatially resolved photometric observations, i.e. our data from Table A1 and measurements published by: Chelli et al. (1995A&AS..114..135C), Duchene (1999A&A...351..954D), Ghez et al. (1993AJ....106.2005G, 1997ApJ...481..378G, 1997ApJ...490..353G), Haas et al. (1990A&A...230L...1H), Hartigan et al. (1994ApJ...427..961H), Koehler et al. (2000A&A...356..541K), Moneti & Zinnecker (1991A&A...242..428M), Richichi et al. (1999A&A...346..501R), Roddier et al. (1996ApJ...463..326R) Simon et al. (1992ApJ...384..212S). Note (2): The values for Av and the spectral type given for the primaries, belong to the systems (see Sect. 2.1 for references). Note (3): Star forming region: 1: Taurus-Auriga 2: Upper Scorpius 3: Chamaeleon I 4: Lupus
Acknowledgements: Jens Woitas
(End) Patricia Bauer [CDS] 20-Aug-2001
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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