NOAO >   Observing Info >   Approved Programs >   2013B-0377

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Proposal Information for 2013B-0377


PI: Michael Gregg, University of California, Davis, gregg@igpp.ucllnl.org
Address: Physics Department, One Shields Ave., Davis, CA 95616, USA

CoI: Michael West, Maria Mitchell Association

Title: Primordial Jeans Mass Dark Matter Halo Objects

Abstract: Intergalactic compact stellar systems -- globular clusters and ultracompact dwarfs -- are known to exist by the tens of thousands in clusters of galaxies. Cold dark matter (CDM) theory predicts they also exist in significant numbers in low density regions and even voids. Primordial compact stellar systems in voids will have evolved in isolation, fossil remnants of the earliest stages of structure formation in the Universe; their characteristics potentially can reveal much about initial conditions in the early Universe. This program will search for these isolated compact stellar systems, both along galaxy filaments and in lower density regions, especially large scale structure voids. Combining the multiplexing advantage of the AAOmega multifiber spectrograph with a powerful selection technique using GALEX/UV and SDSS/optical data to identify candidate CSSs maximizes the probability of detecting these objects. The search for CSSs in low density and empty regions, whether positive or null, will have profound implications for galaxy and large scale structure formation and evolution, testing critical tenets of the CDM paradigm by directly probing the origin of structure in the Universe on galactic and super-galactic scales.


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NOAO >   Observing Info >   Approved Programs >   2013B-0377

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