J/MNRAS/426/3403 UKIDSS-GCS α Per members (Lodieu+, 2012)
Astrometric and photometric initial mass functions from the UKIDSS
Galactic Clusters Survey. II. The α Persei open cluster.
Lodieu N., Deacon N.R., Hambly N.C., Boudreault S.
<Mon. Not. R. Astron. Soc., 426, 3403-3418 (2012)>
=2012MNRAS.426.3403L 2012MNRAS.426.3403L
ADC_Keywords: Clusters, open ; Photometry, infrared ; Proper motions
Keywords: techniques: photometric - brown dwarfs - stars: low-mass -
stars: luminosity function, mass function -
open clusters and associations: individual (α Per) -
infrared: stars
Abstract:
We present the results of a deep (J=19.1mag) infrared (ZY JHK)
survey over the full α Per open cluster extracted from the Data
Release 9 of the United Kingdom Infrared Telescope Infrared Deep Sky
Survey Galactic Clusters Survey (UKIDSS). We have selected ∼700
cluster member candidates in ∼56 square degrees in α Per by
combining photometry in five near-infrared passbands and proper
motions derived from the multiple epochs provided by the UKIDSS
Galactic Clusters Survey (GCS) Data Release 9 (DR9). We also provide
revised membership for all previously published α Per low-mass
stars and brown dwarfs recovered in GCS based on the new photometry
and astrometry provided by DR9.
File Summary:
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FileName Lrecl Records Explanations
--------------------------------------------------------------------------------
ReadMe 80 . This file
tablea1.dat 121 494 Previously-known members recovered in GCS DR9
tableb1.dat 88 728 New members selected by probabilistic approach
tablec1.dat 94 685 New members selected from photometry
and proper motions
tabled1.dat 121 49 Y JHK-only (top) and JHK-only (bottom) detections
tablee1.dat 94 14 Substellar multiple system candidates identified
photometrically in α Per
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See also:
II/319 : UKIDSS-DR9 LAS, GCS and DXS Surveys (Lawrence+ 2012)
J/A+A/436/853 : IR photometry of alpha Per low-mass members (Lodieu+, 2005)
J/AN/319/201 : alpha Per cluster low-mass members. I. (Prosot+, 1998)
J/AN/319/215 : alpha Per cluster low-mass members. II. (Prosser+, 1998)
J/MNRAS/402/1380 : Pleiades and α Per Rotation velocities (Jackson+ 2010)
J/A+A/488/409 : Radial velocities of α Per stars (Mermilliod+, 2008)
J/MNRAS/422/1495 : UKIDSS GCS Pleiades members (Lodieu+ 2012)
J/MNRAS/426/3419 : UKIDSS GCS Praesepe members (Boudreault+ 2012)
J/MNRAS/431/3222 : UKIDSS GCS Upper Sco members (Lodieu, 2013)
http://www.ukidss.org/surveys/surveys.html : UKIDSS Surveys
Byte-by-byte Description of file: tablea1.dat
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Bytes Format Units Label Explanations
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1- 2 I2 h RAh Right ascension (J2000.0)
4- 5 I2 min RAm Right ascension (J2000.0)
7- 11 F5.2 s RAs Right ascension (J2000.0)
13 A1 --- DE- Declination sign (J2000.0)
14- 15 I2 deg DEd Declination (J2000.0)
17- 18 I2 arcmin DEm Declination (J2000.0)
20- 23 F4.1 arcsec DEs Declination (J2000.0)
25- 30 F6.3 mag Zmag ?=99.999 UKIDSS Z-band magnitude
32- 37 F6.3 mag Ymag ?=99.999 UKIDSS Y-band magnitude
39- 44 F6.3 mag Jmag UKIDSS J-band magnitude
46- 51 F6.3 mag Hmag UKIDSS H-band magnitude
53- 58 F6.3 mag K1mag UKIDSS First epoch UKIDSS K-band magnitude
60- 65 F6.3 mag K2mag ?=99.999 2nd epoch UKIDSS K-band magnitude
69- 74 F6.2 mas/yr pmRA ?=- Proper motion in right ascension
75- 79 F5.2 mas/yr e_pmRA ?=- Error on the proper motion in right ascension
82- 88 F7.2 mas/yr pmDE ?=- Proper motion in declination
90- 93 F4.2 mas/yr e_pmDE ?=- Error on the proper motion in declination
95-101 F7.2 --- chi2 ?=- χ2 statistic of the astrometric fit
103-106 F4.2 --- Prob [0/1]?=- Membership probability
108-122 A15 --- Name Older Name and its membership probability (1)
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Note (1): Names and contents:
AP = low-mass stars in α Per, spectral type and membership by
Stauffer et al. 1985ApJ...289..247S 1985ApJ...289..247S, 1989ApJ...346..160S 1989ApJ...346..160S,
<Cl* Melotte 20 AP NNN> in Simbad
APX = X-ray sources in α Per, Prosser and Randich,
in Simbad.
DH = Deacon and Hambly (2004A&A...416..125D 2004A&A...416..125D), with membership probability,
<Cl* Melotte 20 DH NNNN> in Simbad
HE = Heckmann (1956AN....283..109H 1956AN....283..109H),
<Cl Melotte 20 NNNN> in Simbad.
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Byte-by-byte Description of file: tableb1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 2 I2 h RAh Right ascension (J2000.0)
4- 5 I2 min RAm Right ascension (J2000.0)
7- 11 F5.2 s RAs Right ascension (J2000.0)
13 A1 --- DE- Declination sign (J2000.0)
14- 15 I2 deg DEd Declination (J2000.0)
17- 18 I2 arcmin DEm Declination (J2000.0)
20- 23 F4.1 arcsec DEs [0/60] Declination (J2000.0)
25- 30 F6.3 mag Zmag UKIDSS Z-band magnitude
32- 37 F6.3 mag Ymag ?=99.999 UKIDSS Y-band magnitude
39- 44 F6.3 mag Jmag UKIDSS J-band magnitude
46- 51 F6.3 mag Hmag UKIDSS H-band magnitude
53- 58 F6.3 mag K1mag First epoch UKIDSS K-band magnitude
60- 65 F6.3 mag K2mag ?=99.999 2nd epoch UKIDSS K-band magnitude
70- 74 F5.2 mas/yr pmRA Proper motion in right ascension
78- 83 F6.2 mas/yr pmDE Proper motion in declination
85- 88 F4.2 --- Prob [0/1] Membership probability
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Byte-by-byte Description of file: tablec1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 2 I2 h RAh Right ascension (J2000.0)
4- 5 I2 min RAm Right ascension (J2000.0)
7- 11 F5.2 s RAs Right ascension (J2000.0)
13 A1 --- DE- Declination sign (J2000.0)
14- 15 I2 deg DEd Declination (J2000.0)
17- 18 I2 arcmin DEm Declination (J2000.0)
20- 23 F4.1 arcsec DEs Declination (J2000.0)
25- 30 F6.3 mag Zmag UKIDSS Z-band magnitude
32- 37 F6.3 mag Ymag UKIDSS Y-band magnitude
39- 44 F6.3 mag Jmag UKIDSS J-band magnitude
46- 51 F6.3 mag Hmag UKIDSS H-band magnitude
53- 58 F6.3 mag K1mag First epoch UKIDSS K-band magnitude
60- 65 F6.3 mag K2mag ?=- 2nd epoch UKIDSS K-band magnitude
70- 74 F5.2 mas/yr pmRA Proper motion in right ascension
76- 80 F5.2 mas/yr e_pmRA Error on the proper motion in right ascension
83- 88 F6.2 mas/yr pmDE Proper motion in declination
90- 94 F5.2 mas/yr e_pmDE Error on the proper motion in declination
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Byte-by-byte Description of file: table[de]1.dat
--------------------------------------------------------------------------------
Bytes Format Units Label Explanations
--------------------------------------------------------------------------------
1- 2 I2 h RAh Right ascension (J2000.0)
4- 5 I2 min RAm Right ascension (J2000.0)
7- 11 F5.2 s RAs Right ascension (J2000.0)
13 A1 --- DE- Declination sign (J2000.0)
14- 15 I2 deg DEd Declination (J2000.0)
17- 18 I2 arcmin DEm Declination (J2000.0)
20- 23 F4.1 arcsec DEs Declination (J2000.0)
25- 30 F6.3 mag Zmag ?=- UKIDSS Z-band magnitude
32- 37 F6.3 mag Ymag ?=- UKIDSS Y-band magnitude
39- 44 F6.3 mag Jmag UKIDSS J-band magnitude
46- 51 F6.3 mag Hmag UKIDSS H-band magnitude
53- 58 F6.3 mag K1mag First epoch UKIDSS K-band magnitude
60- 65 F6.3 mag K2mag ?=- 2nd epoch UKIDSS K-band magnitude
70- 74 F5.2 mas/yr pmRA Proper motion in right ascension
76- 80 F5.2 mas/yr e_pmRA Error on the proper motion in right ascension
83- 88 F6.2 mas/yr pmDE Proper motion in declination
90- 94 F5.2 mas/yr e_pmDE Error on the proper motion in declination
96-121 A26 --- Com Comments
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Acknowledgements:
Nicolas Lodieu, nlodieu(at)iac.es
References:
Lodieu et al., Paper I 2012MNRAS.422.1495L 2012MNRAS.422.1495L, Cat. J/MNRAS/422/1495
Boudreault et al., Paper III 2012MNRAS.426.3419B 2012MNRAS.426.3419B, Cat. J/MNRAS/426/3419
Lodieu et al., Paper IV 2013MNRAS.431.3222L 2013MNRAS.431.3222L, Cat. J/MNRAS/431/3222
(End) Patricia Vannier [CDS] 25-Apr-2013