J/MNRAS/380/712 ZYJHK photometry in Pleiades (Lodieu+, 2007)
A wide deep infrared look at the Pleiades with UKIDSS: new constraints on the
substellar binary fraction and the low-mass initial mass function.
Lodieu N., Dobbie P.D., Deacon N.R., Hodgkin S.T., Hambly N.C.,
Jameson R.F.
<Mon. Not. R. Astron. Soc., 380, 712-732 (2007)>
=2007MNRAS.380..712L 2007MNRAS.380..712L
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: Pleiades - infrared: star
Abstract:
We present the results of a deep wide-field near-infrared survey
of 12deg2 of the Pleiades conducted as part of the United Kingdom
Infrared Telescope (UKIRT) Infrared Deep Sky Survey (UKIDSS) Galactic
Cluster Survey (GCS). We have extracted over 340 high-probability
proper motion (PM) members down to 0.03M☉ using a combination of
UKIDSS photometry and PM measurements obtained by cross-correlating
the GCS with data from the Two Micron All Sky Survey, the Isaac Newton
Telescope and the Canada-France-Hawaii Telescope. Additionally, we
have unearthed 73 new candidate brown dwarf (BD) members on the basis
of five-band UKIDSS photometry alone. We have identified 23 substellar
multiple system candidates out of 63 candidate BDs from the (Y-K, Y)
and (J-K, J) colour-magnitude diagrams, yielding a binary frequency of
2844 per cent in the 0.075-0.030M☉ mass range.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table4.dat 119 478 Previous Pleiades candidates published by earlier
studies and recovered in the GCS area
tablea1.dat 118 116 *Near-infrared (ZYJHK) photometry for 43
high-probability members and 73 new photometric
candidates in the Pleiades open clusters
tableb1.dat 74 53 List of 53 high-probability and new photometric
candidates classified as PM non-members based on
their PM derived from the 2MASS versus GCS
cross-correlation
tablec1.dat 74 24 List of 24 high-probability and new photometric
candidates classified as photometric non-members
from their location in several CMDs
tabled1.dat 82 35 Near-infrared (ZYJHK) photometry for 35
photometric candidates with no Z detection and
selected from the (Y-J, Y) CMD
tablee1.dat 82 16 Near-infrared (ZYJHK) photometry for 16 candidates
selected from the (J-K, J) CMD and recovered in the
optical surveys (INT + CFHT)
tablef1.dat 82 36 *Near-infrared (ZYJHK) photometry for 36 photometric
low-mass multiple system candidates below
K=13.5mag, corresponding to masses of 0.135M☉
in the Pleiades
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Note on tablea1.dat: All sources are fainter than Z=16mag, corresponding to
masses below 0.1M☉ according to theoretical models.
Note on tablef1.dat : The estimated mass of the primary and the secondary along
with the mass ratio (q) are also given for a total mass less than 70MJup.
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See also:
J/A+AS/100/607 : Pleiades very low mass proper motion members (Hambly+ 1993)
J/A+A/323/139 : K magnitude of Pleiades low-mass binaries (Bouvier+ 1997)
J/A+A/329/101 : Masses of Pleiades members (Raboud+ 1998)
J/A+A/335/183 : Pleiades low-mass stars rotational velocities (Queloz+ 1998)
J/MNRAS/313/347 : Pleiades low-mass stars and brown dwarfs (Pinfield+, 2000)
J/A+A/400/891 : IZ photometry of Pleiades brown dwarfs (Moraux+, 2003)
J/MNRAS/342/1241 : Low-mass stars in M45 and M44 (Pinfield+, 2003)
J/MNRAS/373/95 : ZYJHK survey of Upper Sco association (Lodieu+, 2006)
Byte-by-byte Description of file: table4.dat table[abcde]1.dat
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Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 2 I2 h RAh Right ascension (J2000) (G1)
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 [0/60] Declination (J2000)
25- 30 F6.3 mag Zmag ? UKIDSS Z magnitude (0.8817um)
32- 37 F6.3 mag Ymag ? UKIDSS Y magnitude (1.0305um)
39- 44 F6.3 mag Jmag UKIDSS J magnitude (1.2483um)
46- 51 F6.3 mag Hmag UKIDSS H magnitude (1.6313um)
53- 58 F6.3 mag Kmag UKIDSS K magnitude (2.2010um)
60- 66 F7.2 mas/yr pmRA ? Proper motion along right ascension,
pmRA*cosDE
68- 74 F7.2 mas/yr pmDE ? Proper motion along declination, pmDE
76- 82 A7 --- Status Membership CGS status (G2)
84- 88 F5.3 --- Prob ? Membership probability (1)
90-119 A30 --- ONames Other names (1)
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Note (1): present only in tables 4 and a1.
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Byte-by-byte Description of file: tablef1.dat
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Bytes Format Units Label Explanations
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1- 2 I2 h RAh Right ascension (J2000) (G1)
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 UKIDSS Z magnitude (0.8817um)
32- 37 F6.3 mag Ymag UKIDSS Y magnitude (1.0305um)
39- 44 F6.3 mag Jmag UKIDSS J magnitude (1.2483um)
46- 51 F6.3 mag Hmag UKIDSS H magnitude (1.6313um)
53- 58 F6.3 mag Kmag UKIDSS K magnitude (2.2010um)
60- 64 F5.2 mas/yr pmRA ? Proper motion along right ascension,
pmRA*cosDE
66- 71 F6.2 mas/yr pmDE ? Proper motion along declination, pmDE
73- 74 I2 solMass Mass1 ? Mass of the primary
75 A1 --- --- [+]
76- 77 I2 solMass Mass2 ? Mass of the secondary
79- 82 F4.2 --- q Mass ratio, Mass2/Mass1
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Global notes:
Note (G1): Objects are identified as [LDD2007] JHHMMSS.ss+DDMMSS.s in Simbad.
Note (G2): Status as follows:
Memb = photometric and PM member
PM_NM = PM non-member
cand = photometric candidate
photNM = photometric non-member
dubious = dubious
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 31-Dec-2007