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Job Advertisement: Unspecified Closing Date A new 4-year stellar astrophysics PhD studentship is available at the School of Physics, Trinity College Dublin, to start September 2011. Title: Sub-millimeter Interferometry: a new window into Cool Star Atmospheres Background: The vigorous sub-surface convection that defines "cool stars", such as the Sun, leads to several poorly understood phenomena, such as magnetic field generation, chromospheres, coronae, and stellar mass loss. The physical processes that control these have been studied in some detail in most parts of the electromagnetic spectrum, except at sub-millimeter wavelengths. We are now testing our understanding of stellar atmospheres in this new regime. Project: To analyze interferometric observations of red giants at millimeter and sub-mm wavelengths and to develop state-of-art atmospheric structure and radiative transfer models to help interpret the spectral energy distributions. New data from ALMA will confront atmospheric models constructed from ultraviolet spectra from the Hubble Space Telescope that probe the same surface plasmas, and may reveal the structure and causes of red giant chromospheres. This project will involve a combination of computational astrophysics, observation planning, data reduction and analysis, and constructing new atmospheric models. For further information please contact Dr Graham Harper ([log in to unmask]) ---------------------------------------------------------------------------------- The Royal Astronomical Society Job List is provided free-of-charge through the JISC Mail Service. Although every effort is made to ensure accuracy, the RAS cannot accept responsibility for the accuracy or validity, either directly or by implication, of job advertisements or other information posted to this list. For more information about the Royal Astronomical Society visit the website at www.ras.org.uk. Royal Astronomical Society, Burlington House, Piccadilly, London W1J 0BQ, UK, tel. +44 (0)20 7734 3308, fax. +44 (0)20 7494 0166, www.ras.org.uk