A New Library of Optical Spectra (Silva + 1992)

Details A New Library of Optical Spectra (Silva + 1992) A New Library of Optical Spectra (Silva + 1992)

Sep 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999ycat.3166....0s&link_type=abstract

VizieR On-line Data Catalog: III/166. Originally published in: 1992ApJS...81..865S

Computer Science

2

Spectrophotometry, Spectral Types

Scientific paper

Newly acquired and previously published data have been combined to form a new digital optical library intended primarily for use in empirical population synthesis. Stellar data for a large number of individual stars were acquired during seven observing runs between December 1988 and May 1989. An effort was made to observe, primarily, stars with TZG parameters derived from stellar atmosphere models of high dispersion data. Observations of photometric calibration stars were made during each run, but absolute calibrations were not attempted. Composite spectra from different observations of each star were formed by multiplicatively scaling the individual sub-spectra and averaging. The resultant composite spectra were normalized to 100 at 5450A. Next, the effects of interstellar reddening were removed. Intensities in the spectral regions most affected by telluric absorption were set to zero. Finally, stars with similar TZG parameters and similar overall spectral characteristics were averaged to form the individual spectra in the library, also normalized to 100 at 5450A. Table 1 lists the individual types averaged to form each of the 72 entries in the catalog. The prefixes R and W refer to strong- and weak-line stars, respectively. The list of the observed stars (Table 2 of the paper), and the synthesized UBV colors (Tables 3 and 4 of the paper) were added to the electronic catalog in 1999. (2 data files).

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