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Variation in the frequency separations with activity and impact on stellar parameter determination
Variation frequency separations activity impact
2010/11/15
Frequency separations used to infer global properties of stars through asteroseismology can change depending on the strength and at what epoch of the stellar cycle the p-mode frequencies are measured....
Abundance determination in HII regions from spectra without the [OII]3727+3729 line
galaxies abundances – ISM abundances – Hii regions
2010/11/11
We suggest an empirical calibration for determination of oxygen and nitrogen abundances and
electron temperature in Hii regions where the [Oii]3727+3729 line (R2) is not available.
The calibration...