J/AJ/140/2109 Metallicities of open clusters NGC7160 and NGC2232 (Monroe+, 2010)
Metallicities of young open clusters. I. NGC 7160 and NGC 2232.
Monroe T.R., Pilachowski C.A.
<Astron. J., 140, 2109-2123 (2010)>
=2010AJ....140.2109M 2010AJ....140.2109M
ADC_Keywords: Clusters, open ; Equivalent widths
Keywords: circumstellar matter - open clusters and associations: general -
open clusters and associations: individual (NGC 7160, NGC 2232) -
stars: abundances
Abstract:
We present a moderate-resolution spectroscopic analysis of the
10-25Myr clusters NGC 7160 and NGC 2232 using observations obtained
with the WIYN 3.5m telescope. Both NGC 7160 and NGC 2232 are found to
have super-solar metallicities, with a mean [Fe/H]=0.16±0.03(s.e.m.)
for NGC 7160, and 0.22±0.09(s.e.m.) or 0.32±0.08 for NGC 2232,
depending on the adopted temperature scale. NGC 7160 exhibits solar
distributions of Na, Fe-peak, and alpha-elements. NGC 2232 is
underabundant in light elements Al and Si, by ∼0.25 and ∼0.15dex,
respectively; [Ni/Fe] is roughly solar. The abundance of lithium in
NGC 2232 stars is in agreement with undepleted values reported for
other cluster main-sequence stars. Our abundances are similar to other
metal-rich open clusters and Galactic thin and thick disk stars.
Description:
Program stars were observed with the multi-object spectrograph Hydra
on the WIYN 3.5m telescope on two different observing runs.
Observations of NGC 7160 were obtained in 2006 December at
6125-6435Å, while NGC 2232 was observed in 2007 February and 2007
March at 6380-6800Å.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
stars.dat 78 19 List of studied stars
table6.dat 85 61 Atomic line data and equivalent widths for NGC 7160
table7.dat 43 39 Atomic line data and equivalent widths for NGC 2232
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Byte-by-byte Description of file: stars.dat
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Bytes Format Units Label Explanations
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1- 6 A6 --- Name Star name
8- 9 I2 h RAh Simbad Hour of Right Ascension (J2000.0)
11- 12 I2 min RAm Simbad Minute of Right Ascension (J2000.0)
14- 17 F4.1 s RAs Simbad Second of Right Ascension (J2000.0)
19 A1 --- DE- Simbad Sign of the Declination (J2000.0)
20- 21 I2 deg DEd Simbad Degree of Declination (J2000.0)
23- 24 I2 arcmin DEm Simbad Arcminute of Declination (J2000.0)
26- 27 I2 arcsec DEs Simbad Arcsecond of Declination (J2000.0)
29- 33 F5.2 mag Bmag ? Simbad B band magnitude
35- 39 F5.2 mag Vmag Simbad V band magnitude
41- 44 A4 --- SpType Simbad MK spectral type
47- 71 A25 --- SName Simbad name
73- 78 A6 --- FileName Name of the file containing equivalent widths
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Byte-by-byte Description of file: table6.dat
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Bytes Format Units Label Explanations
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1- 5 A5 --- ID Element species
7- 13 F7.2 0.1nm lambda Wavelength in Angstroms (Å)
15- 18 F4.2 eV ExPot Excitation potential
20- 24 F5.2 [-] log(gf) Log of the oscillator strength
26 I1 --- r_log(gf) Reference for log(gf) (G1)
28- 30 I3 10-13m EW-DG-40 ? Equivalent width for star DG-40 (mÅ)
32- 33 I2 10-13m EW-DG-55 ? Equivalent width for star DG-55 (mÅ)
35- 37 I3 10-13m EW-DG-61 ? Equivalent width for star DG-61 (mÅ)
39- 41 I3 10-13m EW-DG-62 ? Equivalent width for star DG-62 (mÅ)
43- 45 I3 10-13m EW-DG-64 ? Equivalent width for star DG-64 (mÅ)
47- 49 I3 10-13m EW-DG-349 ? Equivalent width for star DG-349 (mÅ)
51- 53 I3 10-13m EW-DG-371 ? Equivalent width for star DG-371 (mÅ)
55- 57 I3 10-13m EW-DG-423 ? Equivalent width for star DG-423 (mÅ)
59- 61 I3 10-13m EW-DG-455 ? Equivalent width for star DG-455 (mÅ)
63- 65 I3 10-13m EW-DG-644 ? Equivalent width for star DG-644 (mÅ)
67- 69 I3 10-13m EW-DG-895 ? Equivalent width for star DG-895 (mÅ)
71- 73 I3 10-13m EW-DG-921 ? Equivalent width for star DG-921 (mÅ)
75- 77 I3 10-13m EW-01-615 ? Equivalent width for star 01-615 (mÅ)
79- 81 I3 10-13m EW-03-654 ? Equivalent width for star 03-654 (mÅ)
83- 85 I3 10-13m EW-03-835 ? Equivalent width for star 03-835 (mÅ)
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Byte-by-byte Description of file: table7.dat
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Bytes Format Units Label Explanations
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1- 4 A4 --- ID Element species
6 A1 --- f_ID [a] Blended feature (1)
8- 14 F7.2 0.1nm lambda Wavelength in Angstroms (Å)
16- 19 F4.2 eV ExPot ? Excitation potential
21- 25 F5.2 [-] log(gf) ? Log of the oscillator strength
27 I1 --- r_log(gf) Reference for log(gf) (G1)
29- 31 I3 10-13m EW-9242 ? Equivalent width for star 9242 (mÅ)
33- 35 I3 10-13m EW-18569 ? Equivalent width for star 18569 (mÅ)
37- 39 I3 10-13m EW-18585 ? Equivalent width for star 18585 (mÅ)
41- 43 I3 10-13m EW-18588 ? Equivalent width for star 18588 (mÅ)
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Note (1): Flag as follows:
a = Blended feature. Equivalent width measurements include contamination
from neighboring species. See text.
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Global notes:
Note (G1): References as follows:
1 = Thevenin (1990A&AS...82..179T 1990A&AS...82..179T)
2 = Reddy et al. (2003, Cat. J/MNRAS/340/304)
3 = Kurucz & Bell (1995, Kurucz CD-ROM)
4 = C. Sneden, private communication.
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History:
From electronic version of the journal
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 13-Jul-2012