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J/AZh/81/209   Neutron capture elements in stars: neodymium  (Mashonkina+, 2004)

Neutron capture elements in halo, thick disk and thin disk stars: neodymium. Mashonkina L.I., Kamaeva L.A., Samotoev V.A., Sakhibullin N.A. <Astron. Zh. 81, 209 (2004)> =2004AZh....81..209M =2004ARep...48..185M
ADC_Keywords: Stars, dwarfs; Spectroscopy; Abundances Abstract: We have derived the LTE neodymium abundances in 60 cool stars with [Fe/H] from 0.25 to -1.71 by applying a synthetic-spectrum analysis to spectroscopic observations of NdII lines with a resolution of λ/Δλ∼60000 and signal-to noise ratios of 100-200. Description: We determined the neodymium abundances for 60 of the 78 stars studied by Mashonkina et al. (2003A&A...397..275M). We obtained spectroscopic observations of seven stars in April 2001 with the UVES echelle spectrometer mounted on the 8-m VLT2 telescope of the European Southern Observatoryin Chile. These observations cover 3800-4500Å and 4750-6650Å. Spectroscopic observations of 53 stars at 4100-6700Å were obtained in 1995-2001 with the FOCES echelle spectrometer mounted on the 2.2-m telescope of the German-Spanish Astronomical Center in Calar Alto, Spain. File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 57 60 Stellar parameters of the selected sample and the final [Nd/Fe] ratios
Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 10 A10 --- Name HD/BD name 14- 17 I4 K Teff Effective temperature (1) 20- 23 F4.2 [cm/s2] logg Surface gravity (2) 26- 28 F3.1 km/s VTurb Microturbulence velocity 31- 35 F5.2 [Sun] [Fe/H] Relative iron abundance 38- 42 F5.2 [Sun] [Nd/Fe] Neodymium abundance 45- 48 F4.2 [Sun] e_[Nd/Fe] ? Standard deviation in [Nd/Fe] 51 I1 --- o_[Nd/Fe] Number of lines used 55- 56 A2 --- Pop Code for population (3)
Note (1): Effective temperature derived from the profiles of the H(α) and H(β) lines. Note (2): Surface gravity was determined using two methods - by analyzing the wings of strong MgI lines and from HIPPARCOS trigonometric parallaxes Note (3): Code indicates the galactic population as follows: 0: thin disk 1: thick disk 2: halo 01: the transition between the thin and thick disks

(End) Veta Avedisova[INASAN] 10-Dec-2004
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