J/MNRAS/470/4285 Open cluster King 1 photometry (Carrera+, 2017)
The open cluster King 1 in the second quadrant.
Carrera R., Rodriguez Espinosa L., Casamiquela L., Balaguer Nunez L.,
Jordi C., Allende Prieto C., Stetson P.B.
<Mon. Not. R. Astron. Soc., 470, 4285-4297 (2017)>
=2017MNRAS.470.4285C 2017MNRAS.470.4285C (SIMBAD/NED BibCode)
ADC_Keywords: Clusters, open ; Photometry, UBVRI ; Photometry, infrared ;
Radial velocities
Keywords: stars: abundances - Galaxy: disc -
open clusters and associations: individual: King 1
Abstract:
We analyse the poorly studied open cluster King 1 in the second
Galactic quadrant. From wide-field photometry, we have studied the
spatial distribution of this cluster. We determined that the centre of
King 1 is located at α2000=00:22 and δ2000=+64:23. By
parameterizing the stellar density with a King profile, we have
obtained a central density of ρ0= 6.5±0.2star/arcmin2 and a
core radius of rcore=1.9±0.2arcmin. By comparing the observed
colour-magnitude diagram of King 1 with those of similar open clusters
and with different sets of isochrones, we have estimated an age of
2.8±0.3Gyr, a distance modulus of (m-M)o=10.6±0.1mag and a
reddening of E(B-V)=0.80±0.05mag. To complete our analysis, we
acquired medium resolution spectra for 189 stars in the area of King
1. From their derived radial velocities, we determined an average
velocity <Vr≥-53.1±3.1km/s. From the strength of the infrared
CaII lines in red giants we have determined an average metallicity of
<[M/H]≥+0.07±0.08dex. From spectral synthesis, we have also
estimated an α-elements abundance of
<[α/M]≥-0.10±0.08dex.
Description:
The observations were carried out the night of 2014 November 14 with
AutoFib2+WYFFOS (AF2) multi-object spectrograph installed at the
primary focus of the 4.2m William Herschel Telescope (WHT) at Roque
de los Muchachos Observatory (La Palma, Spain).
Objects:
-----------------------------------------
RA (2000) DE Designation(s)
-----------------------------------------
00 22 04 +64 23.0 King 1 = Cl King 1
-----------------------------------------
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table1.dat 91 189 Stars observed with AF2
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Byte-by-byte Description of file: table1.dat
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Bytes Format Units Label Explanations
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1- 18 A18 --- Name 2MASS name (2MHHMMSSss+DDMMSSs)
20- 27 F8.6 deg RAdeg Right ascension (J2000)
29- 38 F10.6 deg DEdeg Declination (J2000)
40- 45 F6.3 mag Vmag ?=99.999 V magnitude
47- 52 F6.3 mag Bmag ?=99.999 B magnitude
54- 59 F6.3 mag Imag ?=99.999 I magnitude
61- 66 F6.3 mag Jmag ?=99.999 2MASS J magnitude
68- 73 F6.3 mag Hmag ?=99.999 2MASS H magnitude
75- 80 F6.3 mag Ksmag ?=99.999 2MASS Ks magnitude
82- 87 F6.1 km/s RV Radial velocity
89- 91 F3.1 km/s e_RV rms uncertainty on RV
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History:
From electronic version of the journal
(End) Patricia Vannier [CDS] 24-Apr-2020