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J/A+A/436/687       SMC NGC 346-11 and AV 304 spectra        (Hunter+, 2005)

A non-LTE analysis of the spectra of two narrow lined main sequence stars in the SMC. Hunter I., Dufton P.L., Ryans R.S.I., Lennon D.J., Rolleston W.R.J., Hubeny I., Lanz T. <Astron. Astrophys., 436, 687-695 (2005)> =2005A&A...436..687H
ADC_Keywords: Magellanic Clouds ; Stars, dwarfs ; Abundances, peculiar ; Spectra, ultraviolet Keywords: stars: abundances - stars: atmospheres - stars: early-type - galaxies: individual: Small Magellanic Cloud Abstract: An analysis of high-resolution VLT/UVES spectra of two B-type main sequence stars, NGC 346-11 and AV 304, in the Small Magellanic Cloud (SMC), has been undertaken, using the non-LTE TLUSTY model atmospheres to derive the stellar parameters and chemical compositions of each star. The chemical compositions of the two stars are in reasonable agreement. Moreover, our stellar analysis agrees well with earlier analyses of HII regions. The results derived here should be representative of the current base-line chemical composition of the SMC interstellar medium as derived from B-type stars. Description: High-resolution spectra have been obtained for both NGC 346-11 and AV 304 using the Ultraviolet and Visual Echelle Spectrograph, UVES, on the UT2 (Kueyen) telescope at the European Southern Observatory. NGC 346-11 was observed during a three night run in November 2001, whilst the observations of AV 304, taken during a two night run in January 2001, have been previously discussed by Rolleston et al. (2003A&A...400...21R). Objects: ---------------------------------------------------------- RA (2000) DE Designation(s) ---------------------------------------------------------- 00 58 13.9 -72 09 19 NGC346-11 = Cl* NGC 346 MPG 11 01 02 24. -72 39.0 AV304 = AzV 304 ---------------------------------------------------------- File Summary:
FileName Lrecl Records Explanations
ReadMe 80 . This file table1.dat 31 70 The equivalent widths and derived abundances for the metal lines observed in the spectra of AV 304 and NGC 346-11
Byte-by-byte Description of file: table1.dat
Bytes Format Units Label Explanations
1- 6 A6 --- Ion Species 8- 13 F6.1 0.1nm lambda Wavelength (1) 15- 17 I3 0.1pm EW(AV304) ?=- AV 403 ion equivalent width (2) 19- 22 F4.2 Sun A(AV304) ?=- AV 403 ion abundance 24- 26 I3 0.1pm EW(NGC346-11) ?=- NGC346-11 ion equivalent width (3) 28- 31 F4.2 Sun A(NGC346-11) ?=- NGC346-11 ion abundance
Note (1): The wavelengths of unresolved blends of lines are quoted to the nearest Angstroem. Note (2): The equivalent widths of the spectral lines in AV 304 have been obtained from Rolleston et al. (2003A&A...400...21R). Note (3): The equivalent widths of the spectral lines in NGC 346-11 have been measured using the line fitting program ELF in the spectral analysis package DIPSO (Howarth et al., 1994, Starlink User Note, No. 50.15).
History: From electronic version of the journal
(End) Patricia Vannier [CDS] 26-Jul-2006
The document above follows the rules of the Standard Description for Astronomical Catalogues.From this documentation it is possible to generate f77 program to load files into arrays or line by line

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