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High-precision AsteroseismologY in DeNse stellar fields

An ESA Voyage 2050 long-term plan proposal, HAYDN is a small/medium class space mission, which will improve our understanding of stellar astrophysics and the evolution of clusters, and elucidate the origins of the Milky Way bulge and nearby dwarf galaxies.

The core principle of HAYDN rests on the necessity for long period, high cadence photometry in dense and distant stellar systems, such as globular cluster, local dwarf galaxies and the Milky Way bulge.

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This figure demonstrates the asteroseismology attainable for stars in Omega Centauri, a globular cluster in the Milky Way which is thought to be the core of an accreted dwarf galaxy. The colour coding indicates the colour and magnitude ranges where oscillations will be detectable in stars based on observations over 24 months, with a 90cm diameter telescope.