Spectral synthesis in the ultraviolet. IV - A library of mean stellar groups

Details Spectral synthesis in the ultraviolet. IV - A library of mean stellar groups Spectral synthesis in the ultraviolet. IV - A library of mean stellar groups

Sep 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992apjs...82..197f&link_type=abstract

Astrophysical Journal Supplement Series (ISSN 0067-0049), vol. 82, no. 1, Sept. 1992, p. 197-245. Research supported by Arizona

Astronomy and Astrophysics

Astronomy

80

Astronomical Catalogs, Stellar Spectrophotometry, Ultraviolet Astronomy, Galactic Structure, Iue, Metallicity, Spectral Energy Distribution, Stellar Luminosity

Scientific paper

A library of mean UV stellar energy distributions is derived from IUE spectrophotometry of 218 stars. The spectra cover 1230-3200 A with a spectral resolution of about 6 A. They have been corrected for interstellar extinction and converted to a common flux and wavelength scale. Individual stars were combined into standard groups according to their continuum colors, observed UV spectral morphology, MK luminosity class, and metal abundance. The library consists of 56 groups: 21 dwarf(V), 8 subgiant(IV), 16 giant(III), and supergiant(I + II) groups, covering O3-M4 spectral types. A metal-poor sequence is included, containing four dwarf and two giant groups, as is a metal-enhanced sequence with a single dwarf, subgiant, and giant group. Spectral indices characterizing the continuum and several strong absorption features are examined as temperature, luminosity, and abundance diagnostics. The library is intended to serve as a basis for interpreting the composite UV spectra of a wide variety of stellar systems, e.g., elliptical galaxies, starburst systems, and high-redshift galaxies.

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