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. =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), while observations for the NGC 2158 star were obtained in 2004 December/2005 January. File Summary: -------------------------------------------------------------------------------- FileName Lrecl Records Explanations -------------------------------------------------------------------------------- ReadMe 80 . This file table2.dat 98 7 Stars observed table3.dat 68 136 Equivalent widths -------------------------------------------------------------------------------- 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 : ubvyH{beta} 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 -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 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 -------------------------------------------------------------------------------- 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) * NGC 2158 - Arp & Cuffey (1962ApJ...136...51A, 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) * NGC 2141 - Rosvick (1995MNRAS.277.1379R) * NGC 2158 - Arp & Cuffey (1962ApJ...136...51A) Note (4): Per pixel, measured in orders around the H{alpha} 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). -------------------------------------------------------------------------------- Byte-by-byte Description of file: table3.dat -------------------------------------------------------------------------------- Bytes Format Units Label Explanations -------------------------------------------------------------------------------- 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 m{AA}) 34- 38 F5.1 0.1pm EW2 Equivalent width in NGC 1817-79 (in m{AA}) 40- 44 F5.1 0.1pm EW3 ? Equivalent width in NGC 1883-8 (in m{AA}) 46- 50 f5.1 0.1pm EW4 ? Equivalent width in NGC 1883-9 (in m{AA}) 52- 56 F5.1 0.1pm EW5 ? Equivalent width in NGC 1883-10 (in m{AA}) 58- 62 F5.1 0.1pm EW6 ? Equivalent width in NGC 2141-1007 (in m{AA}) 64- 68 F5.1 0.1pm EW7 ? Equivalent width in NGC 2158-4230 (in m{AA}) -------------------------------------------------------------------------------- History: From electronic version of the journal References: Friel et al., Paper I 2003AJ....126.2372F Friel et al., Paper II 2005AJ....129.2725F, Cat. J/AJ/129/2725 Jacobson et al., Paper III 2008AJ....135.2341J ================================================================================ (End) Greg Schwarz [AAS], Patricia Vannier [CDS] 05-Nov-2011