J/MNRAS/374/372 ZYJHK photometry in Upper Sco (Lodieu+, 2007)
New brown dwarfs in Upper Sco using UKIDSS Galactic Cluster Survey
science verification data.
Lodieu N., Hambly N.C., Jameson R.F., Hodgkin S.T., Carraro G.,
Kendall T.R.
<Mon. Not. R. Astron. Soc., 374, 372-384 (2007)>
=2007MNRAS.374..372L 2007MNRAS.374..372L
ADC_Keywords: Clusters, open ; Photometry, infrared ; Proper motions
Keywords: techniques: photometric - stars: low-mass, brown dwarfs -
stars: luminosity function, mass function -
open clusters and associations: individual: Upper Sco -
infrared: stars
Abstract:
We present first results from a deep (J=18.7), wide-field (6.5deg2)
infrared (ZY JHK) survey in the Upper Sco association conducted within
the science verification phase of the United Kingdom Infrared
Telescope Infrared Deep Sky Survey Galactic Cluster Survey (GCS).
Cluster members define a sequence well separated from field stars in
the (Z-J, Z) colour-magnitude diagram. We have selected a total of 164
candidates with J =10.5-8.7mag from the (Z-J, Z) and (Y-J, Y)
diagrams. We further investigated the location of those candidates in
the other colour-magnitude and colour-colour diagrams to weed out
contaminants. The cross-correlation of the GCS catalogue with the
Two-Micron All-Sky Survey data base confirms the membership of 116
photometric candidates down to 20 Jupiter masses as they lie within a
2 circle centred on the association mean motion. The final list of
cluster members contains 129 sources with masses between 0.3 and
0.007M☉.
Description:
Eight tiles were observed with the UKIRT Wide-Field Camera (WFCAM) in
the association during the science verification phase on 2005 April
813 covering a total of 6.5deg2 in ZY JHK broad-band filters.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table5.dat 102 129 Near-infrared (ZY JHK) photometry for 129 member
candidates in Upper Sco selected on the basis
of their infrared colours
tableb1.dat 102 18 Coordinates (J2000), ZY JHK photometry and
proper motions of 18 photometric non-members
tablec1.dat 102 26 Coordinates (J2000), ZY JHK photometry and
proper motions of 26 proper motion non-members
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See also:
J/A+A/333/619 : Upper Scorpius OB association Lithium survey (Preibisch+ 1998)
J/AJ/124/404 : Upper Sco OB association Lithium survey. II. (Preibisch, 2002)
J/AJ/121/1040 : PMS members of upper Scorpius OB association (Preibisch+, 2001)
J/A+A/464/581 : Sco OB2 intermediate-mass stars (Kouwenhoven+, 2007)
Byte-by-byte Description of file: table*.dat
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Bytes Format Units Label Explanations
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1- 2 I2 h RAh Right ascension (J2000)
4- 5 I2 min RAm Right ascension (J2000)
7- 11 F5.2 s RAs Right ascension (J2000)
13 A1 --- DE- Declination sign (J2000)
14- 15 I2 deg DEd Declination (J2000)
17- 18 I2 arcmin DEm Declination (J2000)
20- 23 F4.1 arcsec DEs Declination (J2000)
25- 30 F6.3 mag Zmag ?=99.999 Z (0.88um) magnitude
32- 36 F5.3 mag e_Zmag ?=9.999 rms uncertainty on Zmag
38- 43 F6.3 mag Ymag Y (1.03um) magnitude
45- 49 F5.3 mag e_Ymag rms uncertainty on Ymag
51- 56 F6.3 mag Jmag J (1.25um) magnitude
58- 62 F5.3 mag e_Jmag rms uncertainty on Jmag
64- 69 F6.3 mag Hmag H (1.65um) magnitude
71- 75 F5.3 mag e_Hmag rms uncertainty on Hmag
77- 82 F6.3 mag Kmag K (2.20um) magnitude
84- 88 F5.3 mag e_Kmag rms uncertainty on Kmag
90- 95 F6.1 mas/yr pmRA ?=99.9 Proper motion along RA, muRA*cosDE
97-102 F6.1 mas/yr pmDE ?=99.9 Proper motion along DE, muDE
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History:
From electronic version of the journal
Nomeclature note:
Objects identified as [LHJ2007] JHHMMSS.ss+DDMMSS.s in Simbad
(End) Patricia Vannier [CDS] 03-Sep-2007