Nonuniqueness of galactic population sythesis models - A reexamination of M31

Details Nonuniqueness of galactic population sythesis models - A reexamination of M31 Nonuniqueness of galactic population sythesis models - A reexamination of M31

May 1980

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980apj...238...79p&link_type=abstract

Astrophysical Journal, Part 1, vol. 238, May 15, 1980, p. 79-85.

Astronomy and Astrophysics

Astrophysics

16

Andromeda Galaxy, Astronomical Models, Stellar Evolution, Uniqueness Theorem, Astronomical Catalogs, Astronomical Photometry, Main Sequence Stars, Metallic Stars

Scientific paper

The empirical population synthesis problem for galaxies is reexamined as a linear program, and a nonuniqueness theorem is presented which allows the prediction of model behavior in the presence of photometric errors. Models of M31 based on O'Connell's spectrophotometry are next examined. The main sequence turnoff point, population metallicity, and relative evolved star to main sequence contributions are shown to be ambiguous as a result of photometric errors and the effects of intrinsic strength anomalies (Taylor and Kellman).

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