J/AJ/137/4753 Red giants equivalent widths in 4 open clusters (Jacobson+, 2009)
Abundances of red giants in old open clusters.
IV. NGC 1817, NGC 1883, NGC 2141, and NGC 2158.
Jacobson H.R., Friel E.D., Pilachowski C.A.
<Astron. J., 137, 4753-4765 (2009)>
=2009AJ....137.4753J 2009AJ....137.4753J
ADC_Keywords: Clusters, open ; Stars, giant ; Equivalent widths
Keywords: Galaxy: abundances -
open clusters and associations: individual
(NGC 1817, NGC 1883, NGC 2141, NGC 2158) - stars: abundances
Abstract:
We present an analysis of high-dispersion echelle spectra of seven
giant stars in the ∼1-2Gyr old open clusters NGC 1817, NGC 1883, NGC
2141, and NGC 2158. Abundances were determined relative to the bright,
mildly metal-poor disk giant Arcturus.
Description:
Observations were carried out using the echelle spectrograph on the
KPNO 4m telescope on two separate observing runs. The majority of the
data were taken in the second run in 2005 November (the same run in
which NGC 7142 was observed; see Paper III, Jacobson et al.,
2008AJ....135.2341J 2008AJ....135.2341J), while observations for the NGC 2158 star were
obtained in 2004 December/2005 January.
File Summary:
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FileName Lrecl Records Explanations
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ReadMe 80 . This file
table2.dat 98 7 Stars observed
table3.dat 68 136 Equivalent widths
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See also:
J/A+A/372/879 : JKBV photometry of NGC 2141 (Carraro+, 2001)
J/A+A/399/105 : Radial velocities of red giants in NGC 1817 (Mermilliod+, 2003)
J/A+A/426/827 : ubvyHβ photometry in NGC 1817/1807 (Balaguer-Nunez+ 2004)
J/AJ/129/2725 : Equivalent widths of red giants in Berkeley 17 (Friel+, 2005)
Byte-by-byte Description of file: table2.dat
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Bytes Format Units Label Explanations
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1- 13 A13 --- Star Star name (1)
15- 18 A4 --- OName Other designation (2)
20 I1 h RAh WEDBA right ascension (J2000) (5)
22- 23 I2 min RAm WEDBA right ascension (J2000) (5)
25- 30 F6.3 s RAs WEDBA right ascension (J2000) (5)
32 A1 --- DE- WEDBA declination sign (J2000) (5)
33- 34 I2 deg DEd WEDBA declination (J2000) (5)
36- 37 I2 arcmin DEm WEDBA declination (J2000) (5)
39- 43 F5.2 arcsec DEs WEDBA declination (J2000) (5)
45- 49 F5.2 mag Vmag V magnitude (3)
51- 54 F4.2 mag B-V ?=- B-V colour index (3)
56- 59 F4.2 mag V-K V-K colour index
61- 64 F4.2 mag J-K J-K colour index
66- 88 A23 --- Date Observation dates
90- 92 I3 --- S/N Signal-to-noise ratio (4)
94- 98 F5.1 km/s RV Radial velocity
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Note (1): Identification used in WEBDA (http://www.univie.ac.at/webda/).
Note (2): Alternate ID References:
* NGC 1817 - Balaguer-Nunez et al. (2004, Cat. J/A+A/426/827,
<[BJG2004] NNNN> in Simbad)
* NGC 2141 - Rosvick (1995MNRAS.277.1379R 1995MNRAS.277.1379R)
* NGC 2158 - Arp & Cuffey (1962ApJ...136...51A 1962ApJ...136...51A, <Cl* NGC 2158 AC c> in Simbad)
Note (3): BV Photometry References:
* NGC 1817 - Mermilliod et al. (2003, cat; J/A+A/399/105)
* NGC 1883 - Carraro et al. (2003MNRAS.343..547C 2003MNRAS.343..547C)
* NGC 2141 - Rosvick (1995MNRAS.277.1379R 1995MNRAS.277.1379R)
* NGC 2158 - Arp & Cuffey (1962ApJ...136...51A 1962ApJ...136...51A)
Note (4): Per pixel, measured in orders around the Hα region
of the spectrum.
Note (5): all positions from WEBDA, except NGC 2158-4230 identified at CDS
with GSC 1864-707 from the chart in Arp & Cuffey (1962ApJ...136...51A 1962ApJ...136...51A).
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Byte-by-byte Description of file: table3.dat
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Bytes Format Units Label Explanations
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1- 5 A5 --- El Element/Ion identification
7- 14 F8.3 0.1nm lambda Wavelength (in Angstroms)
16- 20 F5.3 eV ExPot Excitation potential
22- 26 F5.2 [-] log(gf) Log of oscillator strength
28- 32 F5.1 0.1pm EW1 Equivalent width in NGC 1817-73 (in mÅ)
34- 38 F5.1 0.1pm EW2 Equivalent width in NGC 1817-79 (in mÅ)
40- 44 F5.1 0.1pm EW3 ? Equivalent width in NGC 1883-8 (in mÅ)
46- 50 f5.1 0.1pm EW4 ? Equivalent width in NGC 1883-9 (in mÅ)
52- 56 F5.1 0.1pm EW5 ? Equivalent width in NGC 1883-10 (in mÅ)
58- 62 F5.1 0.1pm EW6 ? Equivalent width in NGC 2141-1007 (in mÅ)
64- 68 F5.1 0.1pm EW7 ? Equivalent width in NGC 2158-4230 (in mÅ)
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History:
From electronic version of the journal
References:
Friel et al., Paper I 2003AJ....126.2372F 2003AJ....126.2372F
Friel et al., Paper II 2005AJ....129.2725F 2005AJ....129.2725F, Cat. J/AJ/129/2725
Jacobson et al., Paper III 2008AJ....135.2341J 2008AJ....135.2341J
(End) Greg Schwarz [AAS], Patricia Vannier [CDS] 05-Nov-2011