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Colloquium by Michael Ireland (Australian National University)

The FunnelWeb survey with the TAIPAN spectrograph: complementing LAMOST for bright stars in the Southern hemisphere

Abstract: Throughout stellar and exoplanetary astrophysics, magnitude-limited medium-resolution spectral surveys have been key for determining which stars are young, which are evolved, and to which population each star belongs. However, on an all-sky basis, this basic data is available for only the relatively ~200,000 stars in the hundred-year old HD catalog. The AAO's Starbugs technology will enable an entirely new generation of rapid, medium-resolution stellar spectroscopic survey for the southern hemisphere to complement LAMOST in the north.  No other competing technology comes even close to providing the rapid redeployment required for surveys targetting millions of bright stars. The FunnelWeb survey will exploit this technology on the in-progress TAIPAN spectrograph, to target the 2 million stars with I<12 south of +10 degrees. When combined with LAMOST’s bright survey, the resulting data set will become the 21st century's HD catalogue - identifying young stars to use as targets for direct imaging searches for exoplanets, providing an input catalogue for NASA's TESS transit search mission. I will also describe progress on the complementary GALAH Galactic archaeology survey currently underway with the HERMES spectrograph at the Anglo Australia Telescope.

Time: Apr. 15, 2015, 2:30 pm

Venue: A135, NAOC