NGC 456 and the Universe's Underestimated Metallicity

Details NGC 456 and the Universe's Underestimated Metallicity NGC 456 and the Universe's Underestimated Metallicity

Oct 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011rmxac..40..175p&link_type=abstract

XIII Latin American Regional IAU Meeting (Eds. W. J. Henney & S. Torres-Peimbert) Revista Mexicana de Astronomía y Astrofísica (

Other

Galaxies: Abundances, Galaxies: Individual (Ngc 456), H Ii Regions

Scientific paper

We want to recalibrate the log(O_{23}) vs. 12+log(O/H) diagram for low metallicity objects in the presence of temperature inhomogeneities, t^2. The first object of our study is NGC 456; we find that the point corresponding to NGC 456 in such diagram shifts up by 0.24 dex in the 12+log(O/H) axis. This shift along with the same behavior in other objects, implies that abundances in the Universe need to be corrected by a factor of approximately 2.

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