search

astrochun / Evolution-of-Galaxies

Research with Dr. Chun Ly. I am working with a sample of ~4000 galaxies from the MACT and DEEP2 surveys. The goal is to determine a robust M-Z-SFR relation for galaxies at z<1 and examine its evolution over the past 8 billion years of cosmic time.
2 stars 0 forks source link

Bug: Incorrect curve fitting for metallicity vs mass individual plot #32

Closed cmccormick1 closed 4 years ago

cmccormick1 commented 4 years ago

After plotting functions were reorganized, the curve fit for composite measurements on the individual metallicity vs mass plot differed from past plots.

cmccormick1 commented 4 years ago

Only some of the revised emission line "Flux_Gaussian" values differ slightly in the "emission_line_fit.revised.tbl" table, and only detection bins differ. ("Flux_Observed" values are the same)

Two runs compared: "MZEvolve/massbin/03272020/75_112_113_300_600_1444_1443errbar_test11" "MZEvolve/massbin/05192020/75_112_113_300_600_1444_1443curvefit_test10"

The emission lines that differ are HDELTA, HGAMMA, OIII_4363, and HBETA, and they usually differ around the third or fourth decimal place. OII_3727, OIII_4958, and OIII_5007 have the same values for the two dates.

astrochun commented 4 years ago

This is likely due to slight changes in the stellar absorption fitting for the Balmer lines and that OIII4363 is weak, so the fit can vary.