J/A+A/578/A27 RV and [Fe/H] in 5 open clusters (Carrera+, 2015)
Radial velocities and metallicities from infrared Ca II triplet spectroscopy of
open clusters. II. Berkeley 23, King 1, NGC 559, NGC 6603, and NGC 7245
Carrera R., Casamiquela L., Ospina N., Balaguer-Nunez L., Jordi C.,
Monteagudo L.
<Astron. Astrophys. 578, A27 (2015)>
=2015A&A...578A..27C 2015A&A...578A..27C
ADC_Keywords: Clusters, open ; Radial velocities ; Abundances, [Fe/H] ;
Photometry
Keywords: open clusters and associations: individual: NGC 6603 -
open clusters and associations: individual: NGC 7245 -
open clusters and associations: individual: King 1 -
open clusters and associations: individual: NGC 559 -
stars: abundances -
open clusters and associations: individual: Berkeley 23
Abstract:
Open clusters are key to studying the formation and evolution of the
Galactic disc. However, there is a deficiency of radial velocity and
chemical abundance determinations for open clusters in the literature.
Aims. We intend to increase the number of determinations of radial
velocities and metallicities from spectroscopy for open clusters.
We acquired medium-resolution spectra (R∼8000) in the infrared region
CaII triplet lines (∼8500Å) for several stars in five open clusters
with the long-slit IDS spectrograph on the 2.5m Isaac Newton Telescope
(Roque de los Muchachos Observatory, Spain). Radial velocities were
obtained by cross-correlation fitting techniques. The relationships
available in the literature between the strength of infrared Ca ii
lines and metallicity were also used to derive the metallicity for
each cluster.
Description:
Medium-resolution spectra in the region of the near-infrared CaII
triplet (CaT) at ∼8500Å were obtained using the Intermediate
Dispersion Spectrograph (IDS) mounted at the Cassegrain focus of the
2.5m Isaac Newton Telescope (INT) located at Roque de los Muchachos
Observatory, Spain. Berkeley 23 was observed in service mode on 2013
January 17 and 18, and the other clusters were observed on 2014 July
18 and 19.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 169 64 Observing logs and program star information
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See also:
B/ocl : Optically visible open clusters & candidates (Dias+ 2002-14)
J/MNRAS/437/804 : UBVRI photometry of NGC559 stars (Joshi+, 2014)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 7 A7 --- Cluster Cluster name
9- 13 A5 --- Star Star name (1)
15- 16 I2 h RAh Right ascension (J2000)
18- 19 I2 min RAm Right ascension (J2000)
21- 24 F4.1 s RAs Right ascension (J2000)
26 A1 --- DE- Declination sign (J2000)
27- 28 I2 deg DEd Declination (J2000)
30- 31 I2 arcmin DEm Declination (J2000)
33- 36 F4.1 arcsec DEs Declination (J2000)
38- 43 F6.3 mag Vmag [12.7/16.2] V magnitude
45- 50 F6.3 mag Bmag [14.3/16.9] B magnitude
52- 57 F6.3 mag Imag [10/13]?=- I magnitude
59- 64 F6.3 mag Ksmag [7/15]?=- 2MASS Ks magnitude
66- 71 F6.2 km/s RV [-86/100] Radial velocity
73- 77 F5.2 km/s e_RV [1.5/12] rms uncertainty on RV
79- 82 F4.2 0.1nm EW8498 ? Equivalent width at λ8498Å
84- 87 F4.2 0.1nm e_EW8498 ? rms uncertainty on EW8498
89- 92 F4.2 0.1nm EW8442 ? Equivalent width at λ8442Å
94- 97 F4.2 0.1nm e_EW8442 ? rms uncertainty on EW8442
99-102 F4.2 0.1nm EW8662 ? Equivalent width at λ8662Å
104-107 F4.2 0.1nm e_EW8662 ? rms uncertainty on EW8662
109-113 F5.2 [Sun] [Fe/H]V [-0.8/1.2]? [Fe/H] from V band
115-118 F4.2 [Sun] e_[Fe/H]V ? rms uncertainty on [Fe/H]V
120-124 F5.2 [Sun] [Fe/H]I [-1.0/22]? [Fe/H] from I band
126-129 F4.2 [Sun] e_[Fe/H]I ? rms uncertainty on [Fe/H]I
131-135 F5.2 [Sun] [Fe/H]K [-1.2/0.9]? [Fe/H] from K band
137-140 F4.2 [Sun] e_[Fe/H]K ? rms uncertainty on [Fe/H]K
142-152 A11 s Texp Exposute time(s) (in s unit)
154-156 I3 --- S/N [9/118] Signal-to-noise ratio per pixel
158-167 A10 "date" Obs.Date Observation date
169 A1 --- Mmb [0/3] Membership code, 1-2=member (2)
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Note (1): Identifications, BVI magnitudes and coordinates taken from WEBDA
database, except for NGC 559, which came from Joshi et al.
(2014MNRAS.437..804J 2014MNRAS.437..804J, Cat. J/MNRAS/437/804).
Note (2): Notes as follows:
0 = Cluster member from radial velocity (RGB or RC)
1 = cluster non-member from radial velocity
2 = Cluster member from radial velocity (main sequence)
3 = Unclear membership
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Acknowledgements:
Ricardo Carrera, rcarrera(at)iac.es
References:
Carrera, Paper I 2012A&A...544A.109C 2012A&A...544A.109C
(End) Patricia Vannier [CDS] 22-May-2015