Empirical calibration of the 4000 A break (Gorgas+, 1999)

Details Empirical calibration of the 4000 A break (Gorgas+, 1999) Empirical calibration of the 4000 A break (Gorgas+, 1999)

May 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999ycat..41390029g&link_type=abstract

VizieR On-line Data Catalog: J/A+AS/139/29. Originally published in: 1999A&AS..139...29G

Computer Science

Stars: Fundamental, Effective Temperatures, Abundances: [Fe/H]

Scientific paper

Empirical fitting functions, describing the behaviour of the λ4000Å break in terms of effective temperature, metallicity and surface gravity, are presented. For this purpose, the break has been measured in 392 stars from the Lick/IDS Library. We have followed a very detailed error treatment in the reduction and fitting procedures, allowing for a reliable estimation of the break uncertainties. This calibration can be easily incorporated into stellar population models to provide accurate predictions of the break amplitude for, relatively old, composite systems. Table 1 lists the star sample, together with spectral types, adopted atmospheric parameters, break measurements, including errors, and residuals from the fitting functions. (1 data file).

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