Revision of Star-Formation Measures

Abstract

Rotation plays a major role in the evolution of massive stars. A revised grid of stellar evolutionary tracks accounting for rotation has recently been released by the Geneva group and implemented into the Starburst99 evolutionary synthesis code. Massive stars are predicted to be hotter and more luminous than previously thought, and the spectral energy distributions of young populations mirror this trend. The hydrogen ionizing continuum in particular increases by a factor of up to 3 in the presence of rotating massive stars. The effects of rotation generally increase towards shorter wavelengths and with decreasing metallicity. Revised relations between star-formation rates and monochromatic luminosities for the new stellar models are presented.

5 pages, 3 figures, to appear in IAU Symp. 255, Low-Metallicity Star Formation, ed. L. Hunt, S. Madden, & R. Schneider (Cambridge: CUP)

References in corpus (5)

• Starburst99: Synthesis Models for Galaxies with Active Star Formation
• The evolution of rotating stars
• Optimization of Starburst99 for Intermediate-Age and Old Stellar Populations
• Realistic Ionizing Fluxes for Young Stellar Populations from 0.05 to twice solar metallicity
• Models for Massive Stellar Populations with Rotation

Cited by in corpus (4)

• Theoretical Evolution of Optical Strong Lines across Cosmic Time
• The VLT-FLAMES Tarantula Survey - XI. A census of the hot luminous stars and their feedback in 30 Doradus
• On the massive star content of the nearby dwarf irregular Wolf-Rayet galaxy IC 4662
• Devasthal Fast Optical Telescope observations of Wolf-Rayet dwarf galaxy Mrk 996