Access to Astronomical Catalogues

← Click to display the menu
J/ApJ/593/1093            IC 348 membership                     (Luhman+, 2003)

A census of the young cluster IC 348. Luhman K.L., Stauffer J.R., Muench A.A., Rieke G.H., Lada E.A., Bouvier J., Lada C.J. <Astrophys. J. 593, 1093 (2003)> =2003ApJ...593.1093L
ADC_Keywords: Clusters, open ; Photometry, CCD Keywords: infrared: stars - stars: evolution - stars: formation - stars: low-mass, brown dwarfs - stars: luminosity function, mass function - stars: premain-sequence Abstract: We present a new census of the stellar and substellar members of the young cluster IC 348. We have obtained images at I and Z for a 42'x28' field encompassing the cluster and have combined these measurements with previous optical and near-infrared photometry. From spectroscopy of candidate cluster members appearing in these data, we have identified 122 new members, 15 of which have spectral types of M6.5M9, corresponding to masses of ∼0.08-0.015M by recent evolutionary models. The latest census for IC 348 now contains a total of 288 members, 23 of which are later than M6 and thus are likely to be brown dwarfs. Description: Images of the IC 348 cluster were obtained with the CFH12K camera on the Canada-France-Hawaii Telescope on the night of 1999 September 30. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table2.dat 146 288 Data for Members of IC 348 table3.dat 106 20 Foreground Stars table4.dat 107 103 Background Stars table6.dat 40 360 Recent Identifications for Sources in IC 348
See also: II/246 : 2MASS All-Sky Catalog of Point Sources (Cutri+ 2003) J/ApJ/525/466 : Young low-mass stars and brown dwarfs in IC 348 (Luhman+, 1999) Byte-by-byte Description of file: table2.dat
Bytes Format Units Label Explanations
1- 5 I5 --- Seq Identification number, Cl* IC 348 LRL NNNNNA in Simbad 6 A1 --- m_Seq Multiplicity on Seq 7 A1 --- f_Seq [hijkl] Flag on Seq (1) 9- 10 I2 h RAh Hour of Right Ascension (J2000) (2) 12- 13 I2 min RAm Minute of Right Ascension (J2000) (2) 15- 19 F5.2 s RAs Second of Right Ascension (J2000) (2) 20 A1 --- DE- Declination sign (J2000) 21- 22 I2 deg DEd Degree of Declination (J2000) (2) 24- 25 I2 arcmin DEm Arcminute of Declination (J2000) (2) 27- 30 F4.1 arcsec DEs Arcsecond of Declination (J2000) (2) 32- 63 A32 --- SpType Spectral Type/Halpha equivalent width (3) 65- 69 A5 --- r_SpType References on SpType (4) 71- 75 A5 --- Adopt Adopted spectral type 77- 86 A10 --- Mem Membership in IC 348 code (5) 88- 92 I5 K Teff ? Effective temperature (6) 94- 97 F4.2 mag AJ ? Extinction in the J band 99-107 F9.5 solLum LBol ? Bolometric luminosity 109-112 F4.2 mag R-I ? The (R-I) color (7) 114-118 F5.2 mag Imag ? The I band magnitude (8) 120-123 F4.2 mag I-Z ? The (I-Z) color from this work 125-128 F4.2 mag J-H ? The (J-H) color 130-133 F4.2 mag H-Ks ? The (H-Ks) color 135-139 F5.2 mag Kmag ? The Ks band magnitude 141 A1 --- r_J-H JHKs reference (9) 143-145 A3 --- IMF [yes no] Included in the IMF sample?
Note (1): the flag has the following meaning: h = Sources 1, 6, 9, 52, 86, 92, 221, and 226 are resolved as binaries with separations of 0.61, 0.559, 0.409, 1.028, 0.249, 0.26, 0.13, and 0.70 arcseconds and magnitude differences of ΔH = 0.14, 1.49, 1.84, 1.48, 0.67, 0.67, 1.35, and 0.75, respectively (Duchene et al., 1999A&A...343..831D). i = R-I and JHKs are for A+B. j = JHKs are for A+B. k = Spectral type and JHKs are for A+B. LBol is for A. l = Spectral type and JHKs are for A+B. Note (2): From the 2MASS Point Source Catalog for 1, 2, 3, 4, 6, 7, 8, 10, 16, 19, 63, 88, 90, 122, 242, 286, and 367. The coordinates for 91 are derived in the manner described in Section 4.1. All other coordinates are from the I-band images in this work. Note (3): Measurement uncertainties for the optical spectral types from Luhman (1999, Cat. J/ApJ/525/466) and this work are ±0.5 and 0.25 subclass for K and M types, respectively, unless noted otherwise. For Hα equivalent widths from Luhman et al. (1998ApJ...508..347L), Luhman (1999, Cat. J/ApJ/525/466), and this work, uncertainties are 0.5-1Å unless noted otherwise. Note (4): References are numbered as follows: 1 = Harris et al. (1954ApJ...119..622H); 2 = Luhman et al. (1998ApJ...508..347L) 4 = Strom et al. (1974PASP...86..798S); 5 = Herbig (1998, Cat. J/ApJ/497/736); 6 = Measurements described by Luhman (1999, Cat. J/ApJ/525/466) and presented here for the first time; 7 = this work; 8 = Luhman (1999, Cat. J/ApJ/525/466). Note (5): Membership in IC 348 code use the following notation: AV=AV≳1 and a position above the main sequence for the distance of IC 348; e = emission lines; NaK = spectral features such as Na I and K I; ex = Ks excess emission; pm = proper motion measurements (Fredrick, 1956AJ.....61..437F). Note (6): From Schmidt-Kaler (1982, in Landolt-Bornstein, Group VI, Vol. 2, ed. K.-H. Hellwege (Berlin: Springer), 454) (≤M0) and Table 8 (>M0). Note (7): From Luhman (1999, Cat. J/ApJ/525/466) for stars with R-I≥1.5 and for 435 and from Herbig (1998, Cat. J/ApJ/497/736) for the remaining objects. Note (8): From Herbig (1998, Cat. J/ApJ/497/736) for 16, 33, 63, 71, 88, 90, and 91, from Luhman (1999, Cat. J/ApJ/525/466) for 367, and from this work for the remaining objects. Note (9): JHKs reference: 3 = 2MASS Point Source Catalog; Cat. II/246 9 = Muench et al. (2003AJ....125.2029M).
Byte-by-byte Description of file: table3.dat table4.dat
Bytes Format Units Label Explanations
1- 5 I5 --- Seq Sequential number 7- 8 I2 h RAh Right ascension (J2000) (1) 10- 11 I2 min RAm Right ascension (J2000) 13- 17 F5.2 s RAs Right ascension (J2000) 19 A1 --- DE- Declination sign (J2000) 20- 21 I2 deg DEd Declination (J2000) 23- 24 I2 arcmin DEm Declination (J2000) 26- 29 F4.1 arcsec DEs Declination (J2000) 31- 54 A24 --- SpType Spectral type 56- 60 A5 --- r_SpType Reference for spectral type (6) 63- 71 A9 --- FE Foregroung or Background evidence (2) 74- 77 F4.2 mag R-I ? R-I colour index (3) 79- 83 F5.2 mag Imag ? I magnitude (4) 85- 88 F4.2 mag I-Z ? I-Z colour index (4) 90- 94 F5.2 mag J-H ? I-Z colour index (5) 96-100 F5.2 mag H-Ks ? H-Ks colour index (5) 102-106 F5.2 mag Ksmag ? Ks magnitude (5)
Note (1): The positions are from the 2MASS Point Source Catalog for 18, 28, 206 and 370. All other coordinates are from the I-band images in this work. Note (2): Foreground nature is indicated by proper-motion measurements ("pm"; Blaauw, 1952BAN....11..405B; Scholz et al., 1999, Cat. J/A+AS/137/305) or a combination of no Li absorption ("Li"), AV∼0 ("AV"), and spectral features such as strong Na I and K I ("NaK"; Luhman et al., 1998ApJ...508..347L; this work). Note (3): From Herbig, 1998, Cat. J/ApJ/497/736 for 77, 106 and 106 and from Luhman 1999, Cat. J/ApJ/525/466 for the remaining objects. Note (4): From this work. Note (5): From 2MASS for 14, 18, 27, 28, 34, 43, 54, 57, 73, 77, 80, 131, 189, 320, 400, 1788, 131, 1932, 1941, 10226, 10252, and 10338 and from Muench et al. (2003AJ....125.2029M) for the remaining objects. Note (6): References are numbered as follows: (1): Luhman et al., 1998ApJ...508..347L (2): this work. (3): measurements described by Luhman 1999, Cat. J/ApJ/525/466 and presented here for the first time; (4): Fredrick, 1956AJ.....61..437F (5): Herbig, 1998, Cat. J/ApJ/497/736
Table 5: Sources with Uncertain Membership Status -------------------------------------------------------------------------------- ID RA (J2000) DE SpType Ref Stat R-I I I-Z J-H H-Ks Ks -------------------------------------------------------------------------------- 81 03 44 50.00 32 03 45.7 F2-G2 or giant1 m/b 15.08 0.81 1.04 0.46 10.97 197 03 44 29.11 32 07 51.0 G6-K1(IR) 2 m/b 2.02 17.36 1.00 1.37 0.61 12.15 1927 03 45 07.74 32 00 27.6 K3-K4 3 m/f 11.71 0.36 0.63 0.17 9.67 -------------------------------------------------------------------------------- Note: Status: m = member, b = background, f = foreground. References: 1: Measurements described by Luhman 1999, Cat. J/ApJ/525/466 and presented here for the first time; 2: Luhman et al., 1998ApJ...508..347L 3: this work. Byte-by-byte Description of file: table6.dat
Bytes Format Units Label Explanations
1- 5 I5 --- Seq Identification number (1) 6 A1 --- m_Seq Multiplicity indicator 9- 11 I3 --- H98 ? Herbig (1998, Cat. J/ApJ/497/736) ID number 13- 18 A6 --- Naj00 Najita et al. (2000, Cat. J/ApJ/541/977) ID 20- 22 I3 --- Pre02 ? Preibisch & Zinnecker (2002AJ....123.1613P) ID 24- 40 A17 --- 2MASS The 2MASS ID number
Note (1): From Luhman et al. 1998ApJ...508..347L) Luhman (1999ApJ...525..466L), and this work.
History: From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Bauer [CDS] 24-Oct-2003
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