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Locations of Peculiar Supernovae as a Diagnostic of Their Origins
Fang Yuan, Chiaki Kobayashi, Brian P. Schmidt +3
We put constraints on the properties of the progenitors of peculiar calcium-rich transients using the distribution of locations within their host galaxies. We confirm that this cla…
The 6dF Galaxy Survey: Stellar Population Trends Across and Through the Fundamental Plane
Christopher M. Springob, Christina Magoulas, Rob Proctor +6
We present results from an analysis of stellar population parameters for 7132 galaxies in the 6dFGS Fundamental Plane (FP) sample. We bin the galaxies along the axes, , ,…
Re-ionizing the Universe without Stars
Michael A. Dopita, Lawrence M. Krauss, Ralph S. Sutherland +2
Recent observations show that the measured rates of star formation in the early universe are insufficient to produce re-ionization, and therefore, another source of ionizing photon…
Chemical Enrichment in the Carbon-enhanced Damped Lyman System
Chiaki Kobayashi, Nozomu Tominaga, Ken'ich Nomoto
We show that the recently observed elemental abundance pattern of the carbon-rich metal-poor Damped Lyman (DLA) system is in excellent agreement with the nucleosynthesis yields…
Early-type galaxies at large galactocentric radii - II. Metallicity gradients, and the [Z/H]--mass, [alpha/Fe]--mass relations
Max Spolaor, Chiaki Kobayashi, Duncan A. Forbes +2
We present the results of a study of stellar population properties at large galactocentric radii of 14 low-mass early-type galaxies in the Fornax and Virgo clusters. We derive radi…
Chemodynamical simulations with variable IMF
Chiaki Kobayashi
Using self-consistent chemodynamical simulations including star formation, supernova feedback, and chemical enrichment, I show the dependence of cosmic star formation and chemical…