Spectral classification of select delta Scuti stars. II

Details Spectral classification of select delta Scuti stars. II Spectral classification of select delta Scuti stars. II

Dec 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981pasp...93..735p&link_type=abstract

Astronomical Society of the Pacific, Publications, vol. 93, Dec. 1981, p. 735-740.

Astronomy and Astrophysics

Astronomy

5

Spectrograms, Stellar Luminosity, Stellar Spectra, Stellar Structure, Variable Stars, Calibrating, Giant Stars, Main Sequence Stars, Spectrum Analysis, Stellar Interiors, Stellar Models

Scientific paper

An accurate determination of the spectral type in any star fixes its position in the H-R diagram; this becomes important when establishing a period-luminosity-color relation (PLCR), which is useful in distance calibration or when modeling stellar interiors. Spectroscopic observations from two Mexican observatories were used as the data for a reclassification of several delta-Scuti stars. Since the new spectral types assigned differed significantly from previous ones for a few stars, and thus for the absolute magnitude value changes, new positions in both the H-R and PLCR diagrams had to be obtained. It is shown that changes in the spectral types in delta-Scuti stars were small enough that the pulsation changes were masked by the low dispersion used (125 A/mm).

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