Hot-Star Models from 100 to 10,000 Angstroms

Details Hot-Star Models from 100 to 10,000 Angstroms Hot-Star Models from 100 to 10,000 Angstroms

2012-03-07

arxiv.org/abs/1203.1529v1

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

14 pages, invited talk presented at IWSSL 2011, Delhi (India), December 2011. To be published in Astronomical Society of India

Scientific paper

The spectral libraries of hot, massive stars which are implemented in the population synthesis code Starburst99 are discussed. Hot stars pose particular challenges for generating libraries. They are rare, they have an intense radiation field and strong stellar winds, and a luminosity bias towards ultraviolet wavelengths. These properties require the utilization of theoretical libraries. Starburst99 uses static non-LTE models at 0.3 A resolution in the optical, spherically extended, expanding models at 0.4 A resolution in the satellite-ultraviolet, and blanketed, low-resolution radiation-hydrodynamical models in the extreme ultraviolet down to X-rays. I review the main features of each library, compare them to observations, and discuss their link with stellar evolution models.

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