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J/ApJ/662/413 2MASS survey of wide multiplicity in 3 associations (Kraus+, 2007)

The role of mass and environment in multiple-star formation: a 2MASS survey of wide multiplicity in three young associations. Kraus A.L., Hillenbrand L.A. <Astrophys. J., 662, 413-430 (2007)> =2007ApJ...662..413K
ADC_Keywords: Associations, stellar ; Stars, double and multiple ; Photometry, infrared Keywords: binaries: visual - stars: low-mass, brown dwarfs - stars: pre-main sequence Abstract: We present the results of a search for wide binary systems among 783 members of three nearby young associations: Taurus-Auriga, Chamaeleon I, and two subgroups of Upper Scorpius. Near-infrared (JHK) imagery from 2MASS was analyzed to search for wide (1"-30"; ∼150-4500AU) companions to known association members, using color-magnitude cuts to reject likely background stars. We identify a total of 131 candidate binary companions with colors consistent with physical association, of which 39 have not been identified previously in the literature. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2.dat 110 783 Confirmed Members of Nearby Young Associations table3.dat 93 49 Close Pairs of Confirmed Association Members table5.dat 91 82 Candidate Wide Binary Systems table6.dat 108 72 Ultrawide Visual Companions table7.dat 73 103 Inferred Binary Properties refs.dat 103 42 References
See also: II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003) Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 26 A26 --- Name Source name (1) 28- 33 A6 --- Reg Source region (ChamI, Taurus, UScoA, or UScoB) 35- 36 I2 h RAh Hour of Right Ascension (J2000) 38- 39 I2 min RAm Minute of Right Ascension (J2000) 41- 45 F5.2 s RAs Second of Right Ascension (J2000) 47 A1 --- DE- Sign of the Declination (J2000) 48- 49 I2 deg DEd Degree of Declination (J2000) 51- 52 I2 arcmin DEm Arcminute of Declination (J2000) 54- 57 F4.1 arcsec DEs Arcsecond of Declination (J2000) 59- 63 F5.2 mag Kmag 2MASS K band magnitude 65- 68 F4.2 mag J-K 2MASS (J-K) color index 70- 74 F5.2 mag H-K 2MASS (H-K) color index 76- 80 A5 -- SpT Spectral type (from low-resolution spectra) 82- 86 F5.3 solMass Mass Estimated stellar Mass 88- 93 F6.3 --- chi3 The chi^3^ value (2) 95-100 F6.1 mas/yr pmRA ? USNO B1.0 proper motion along RA 102-107 F6.1 mas/yr pmDE ? USNO B1.0 proper motion along DE 109-110 I2 --- Ref Reference, in refs.dat files
Note (1): RXJ 1502.9-2022 is a misprint for RX J1602.9-2022 RXJ 1551.1-2521 is a misprint for RX J1555.1-2521 Note (2): A statistic to measure how well each object is fit by a single point source; see Section 3.2.
Byte-by-byte Description of file: table3.dat
Bytes Format Units Label Explanations
1- 26 A26 --- Name Primary source name 27- 50 A24 --- Name2 Secondary source name 51- 54 F4.2 mag (J-K)1 Primary 2MASS (J-K) color index 56- 59 F4.2 mag (H-K)1 Primary 2MASS (H-K) color index 61- 65 F5.2 mag Kmag1 Primary 2MASS K band magnitude 67- 70 F4.2 mag (J-K)2 Seconday 2MASS (J-K) color index 72- 75 F4.2 mag (H-K)2 Seconday 2MASS (H-K) color index 77- 81 F5.2 mag Kmag2 Seconday 2MASS K band magnitude 83- 87 F5.2 arcsec Sep Projected Separation 89- 93 F5.1 deg PA Position angle
Byte-by-byte Description of file: table5.dat
Bytes Format Units Label Explanations
1- 26 A26 --- Name Source name 28- 31 F4.2 mag (J-K)1 Primary 2MASS (J-K) color index 33- 37 F5.2 mag (H-K)1 Primary 2MASS (H-K) color index 39- 43 F5.2 mag Kmag1 Primary 2MASS K band magnitude 45- 48 F4.2 mag (J-K)2 Seconday 2MASS (J-K) color index 50- 54 F5.2 mag (H-K)2 Seconday 2MASS (H-K) color index 56- 60 F5.2 mag Kmag2 Seconday 2MASS K band magnitude 62- 66 F5.2 arcsec Sep Projected Separation 68- 72 F5.1 deg PA Position angle 74- 77 I4 mas/yr pmRA ? USNO B1.0 proper motion along RA (1) 79- 82 I4 mas/yr pmDE ? USNO B1.0 proper motion along DE (1) 84- 86 A3 --- Met Identification method (2) 88- 89 I2 --- Ref ? Reference, in refs.dat files 91 A1 --- n_Ref [a] Note on ScoPMS052 B (3)
Note (1): An entry of 0 for both pmRA and pmDE denotes a source which was detected by the USNO-B survey, but did not show a significant proper motion. A blank entry for both pmRA and pmDE denotes a source which was not detected by the USNO-B survey. Note (2): Identification method as follows: PSC = 2MASS Point Source Catalog PSF = PSF-fitting photometry Note (3): 'a' indicates that ScoPMS052 B is also known as GSC06209-01312; Martin et al. (1998MNRAS.300..733M) identified it as a WTTS.
Byte-by-byte Description of file: table6.dat
Bytes Format Units Label Explanations
1- 26 A26 --- Name Source name 28- 31 F4.2 mag (J-K)1 Primary 2MASS (J-K) color index 33- 36 F4.2 mag (H-K)1 Primary 2MASS (H-K) color index 38- 42 F5.2 mag Kmag1 Primary 2MASS K band magnitude 44- 47 F4.2 mag (J-K)2 Seconday 2MASS (J-K) color index 49- 52 F4.2 mag (H-K)2 Seconday 2MASS (H-K) color index 54- 58 F5.2 mag Kmag2 Seconday 2MASS K band magnitude 60- 64 F5.2 arcsec Sep Projected Separation 66- 70 F5.1 deg PA Position angle 72- 74 I3 mas pmRA ? USNO B1.0 proper motion along RA 76- 79 I4 mas pmDE ? USNO B1.0 proper motion along DE 81-103 A23 --- Note Notes 105-106 I2 --- r_Note ? Reference for Note, in refs.dat files 108 A1 --- n_Note [abcd] Individual notes (1)
Note (1): Flag on Ref as follows: a = The source [CCE98] 2-26 is an ultrawide neighbor of both ChaHa7 and CHXR76; its physical association, if any, is uncertain. b = Haro 6-5 B is a known member of Taurus (Mundt et al., 1984A&A...140...17M), but was not included as part of our statistical sample because its spectral type is uncertain. c = USco-160428.4-190441 B is also known as GSC06208-00611; Preibisch et al. (1998, Cat. J/A+A/333/619) identified it as a field star. d = SCH16075850-20394890 B is also known as T64-2; The (1964PASP...76..293T) identified it as a strong Hα emitter.
Byte-by-byte Description of file: table7.dat
Bytes Format Units Label Explanations
1- 26 A26 --- Name Source name 28- 32 A5 --- SpT1 Primary spectral type 34- 38 F5.3 solMass Mass1 Primary mass 40- 44 A5 --- SpT2 Secondary spectral type (1) 46- 49 A4 --- SpT2f Secondary spectral type from system flux ratio (1)(2) 51- 54 F4.2 solMass Mass2 ? Secondary mass (1) 56 A1 --- l_Mass2f Limit flag on 57- 61 F5.2 solMass Mass2f Secondary mass from system flux ratio (1)(2) 63- 66 I4 AU Sep Projected separation (1) 68 A1 --- l_q Limit flag on q 69- 73 F5.2 --- q Mass ratio (1)
Note (1): Estimated statistical uncertainties are ∼10% for mass ratios, ∼20% for secondary masses, ∼2-3 subclasses for spectral types, and ∼10% for projected separations. Note (2): Estimated from the system flux ratio ΔJ and the spectroscopically determined properties of the primary.
Byte-by-byte Description of file: refs.dat
Bytes Format Units Label Explanations
1- 2 I2 --- Ref Reference code 4- 22 A19 --- BibCode BibCode 24- 45 A22 --- Aut Author's name 47-103 A57 --- Com Comments
History: * From electronic version of the journal * 11-Jul-2009: Names homogenized between the different tables * 08-Apr-2011: 14 names of table2 corrected (previous version available as file "table2.v01")
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 03-May-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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