Statistical classification of IUE low-despersion stellar spectra: Progress report

Details Statistical classification of IUE low-despersion stellar spectra: Progress report Statistical classification of IUE low-despersion stellar spectra: Progress report

Dec 1984

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984nascp2349..512e&link_type=abstract

In NASA. Goddard Space Flight Center Future of Ultraviolet Astronomy Based on Six Years of IUE Res. p 512-515 (SEE N85-20961 1

Astronomy and Astrophysics

Astronomy

2

Astronomical Catalogs, High Resolution, Iue, O Stars, Stellar Spectra, Ultraviolet Spectra, Data Processing, Principal Components Analysis, Spectral Correlation, Stellar Luminosity, Stellar Winds

Scientific paper

The 1200A to 1900A region was surveyed in about high resolution IUE SWP data for about 120 0-types stars having homogeneous optical spectral classifications. Standard extacted spectrograms were rebinned to a constant wavelength resolution of 0.25A, uniformly nomalized (not dereddened), and then plotted at 10A/cm, with reseau, photometric quality, and echelle order junction flags available. This resolving power of 6000 at 1500A permits clear discrimination between stellar and interstellar features. Results show a high degree of correlation between the UV features, both photospheric and stellar-wind, and the optical spectral types/lumonosity classes for the majority of normal stars. A large-format spectra atlas, to be published by NASA, illustrating the full 1200A to 1900A range in about 100 of these objects is being prepared. The tracings will extend across two facing pages with four or five objects per montage, showing spectral-type and luminosity sequences as well as peculiar spectra.

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