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J/A+A/481/661    Hyades brown dwarfs and very low mass stars    (Bouvier+, 2008)

Brown dwarfs and very low mass stars in the Hyades cluster: a dynamically evolved mass function. Bouvier J., Kendall T., Meeus G., Testi L., Moraux E., Stauffer J.R., James D., Cuillandre J.-C., Irwin J., McCaughrean M.J., Baraffe I., Bertin E. <Astron. Astrophys., 481, 661-672 (2008)> =2008A&A...481..661B
ADC_Keywords: Clusters, open ; Photometry ; Proper motions Keywords: stars: luminosity function, mass function - stars: low-mass, brown dwarfs - Galaxy: open clusters and associations: individual: Hyades (Melotte 25) Abstract: We conducted a search for brown dwarfs (BDs) and very low mass (VLM) stars in the 625Myr-old Hyades cluster in order to derive the cluster's mass function across the stellar-substellar boundary. We performed a deep (I=23, z=22.5) photometric survey over 16deg2 around the cluster center and followed up with K-band photometry to measure the proper motion of candidate members and with optical and near-IR spectroscopy of probable BD and VLM members. Description: Wide-field optical images were obtained in the I and z bands with the CFHT 12 K camera. The survey was performed during several service observing runs between September 2002 and January 2003, and consists of 53 mosaic fields covering a total of 17.3 square degrees over the cluster area. Follow up K'-band imaging was obtained for 108 of the 125 optically selected candidate members. About half of this sample was observed in Nov/04 and the other half in Nov/05. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 98 22 Probable Hyades members based on photometry and proper motion tabled1.dat 98 103 Hyades probable non-members: candidate members selected from the (I, I-z) CMD but whose infrared colors and/or proper motion is inconsistent with membership
See also: J/AJ/80/379 : Hyades cluster: motion, membership and distance (Hanson+, 1975) J/ApJ/325/798 : Einstein survey of stars in the Hyades (Micela+, 1988) J/A+A/243/386 : Hyades members distances (Schwan 1991) J/A+A/310/879 : Hyades binaries (Barrado+, 1996) J/A+A/331/81 : Hyades membership (Perryman+ 1998) J/AZh/77/96 : Abundances in Hyades red giants (Boyarchuk+, 2000) J/A+A/367/111 : A Hipparcos study of the Hyades cluster (de Bruijne+, 2001) J/other/NewA/8.645 : Vmag/plx relation for Hyades stars (Sharaf+, 2003) J/AJ/127/3579 : Radial velocities of Hyades stars (Paulson+, 2004) J/AJ/132/111 : BV(RI)Cphotometry of 77 Hyades stars (Joner+, 2006) Byte-by-byte Description of file: table1.dat tabled1.dat
Bytes Format Units Label Explanations
1- 8 A8 --- --- [CFHT-Hy-] 9- 10 I2 --- CFHT ? CFHT-Hy designation (table1 only) Cl* Melotte 25 CFHT NN in Simbad 12 A1 --- n_CFHT [1-7] Note on CFHT (1) 14- 26 A13 --- [BKM2008] Internal number 28 A1 --- n_[BKM2008] [1-7 a-c] Note on [BKM2008] (1) 31 I1 h RAh Right ascension (J2000) 33- 34 I2 min RAm Right ascension (J2000) 36- 39 F4.1 s RAs Right ascension (J2000) 41 A1 --- DE- Declination sign (J2000) 42- 43 I2 deg DEd Declination (J2000) 45- 46 I2 arcmin DEm Declination (J2000) 48- 49 I2 arcsec DEs Declination (J2000) 51- 55 F5.2 mag Imag I (822nm) magnitude 57- 60 F4.2 mag I-z I-z colour index 62- 65 F4.2 mag I-K ? I-K colour index 67- 70 I4 mas/yr pmRA ? Proper motion along RA, pmRA*cosDE 72- 75 I4 mas/yr pmDE ? Proper motion along DE 77- 98 A22 --- Oname Other name(s) (2)
Note (1): Notes as follows: 1 = A faint companion is seen 3.2" away from this Hyades probable member but its I-K color and proper motion indicates a background star 2 = Classified as a non member by Reid (1993MNRAS.265..785R). Spectroscopically confirmed as a non-member in this study (see text) 3 = Classified as a non member by Reid (1993MNRAS.265..785R). Spectroscopically confirmed as a member in this study (see text) 4 = CFHT-Hy-15 and 17 form a visual pair (RHy 240 AB) 5 = Classified as a non member by Gizis et al. (1999AJ....118..997G), see text 6 = This probable Hyades BD was also observed in the J and H bands, yielding (J-H, H-K)=(0.51, 0.43) 7 = This probable Hyades BD was also observed in the J and H bands, yielding (J-H, H-K)=(1.12, 0.77) a = This candidate has a proper motion consistent with membership but is too blue in I-K to be a cluster member b = This candidate has candidate has no follow up K-band photometry c = This extremely red object was also observed in the J and H bands, yielding (J-H, H-K)=(2.24, 0.91) Note (2): Other names are from: VA = van Altena (1969AJ.....74....2V), Cl* Melotte 25 VA NNN in Simbad LP = Luyten et al. (1981, Cat. I/98) HAN = Hanson (1975AJ.....80..379H), Cl* Melotte 25 Han NNN in Simbad RHy = Reid (1992MNRAS.257..257R), Cl* Melotte 25 REID NNN in Simbad LH = Leggett & Hawkins (1988MNRAS.234.1065L), Cl* Melotte 25 LH NNN in Simbad LHD = Leggett et al. (1994AJ....108..944L) 2MASS = Gizis et al. (1999AJ....118..997G)
History: From electronic version of the journal
(End) Patricia Vannier [CDS] 30-Jun-2008
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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