Measuring the Balmer Jump and Effective Gravity in FGK Stars

Details Measuring the Balmer Jump and Effective Gravity in FGK Stars Measuring the Balmer Jump and Effective Gravity in FGK Stars

2007-06-19

arxiv.org/abs/0706.2739v1

PASP 119 June 2007

Astronomy and Astrophysics

Astrophysics

20 pages, 13 figures and 4 tables

Scientific paper

10.1086/519981

It is difficult to accurately measure the effective gravity (log g) in late-type stars using broadband (eg. UBV or SDSS) or intermediate-band (uvby) photometric systems, especially when the stars can cover a range of metallicities and reddenings. However, simple spectroscopic observational and data reduction techniques can yield accurate values for log g through comparison of the Balmer jumps of low-resolution spectra with recent grids of synthetic flux spectra.

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