Large Scale Structure with Pan-STARRS

Astronomy and Astrophysics – Astronomy

Scientific paper

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Scientific paper

After 3 years of observations the stacked data from the Pan-STARRS 3pi and Medium Deep Surveys will be a powerful resource for the study of the large scale galaxy distribution. The multi-band, grizy, photometry will provide photometric redshifts for huge samples of galaxies. The MDS will have a median redshift of z=1 and contain over 5 million galaxies. This makes it ideal for studying the evolution of galaxy clustering and dependence of galaxy clustering on galaxy properties (e.g. colour or luminosity). The shallower 3pi survey probes significantly deeper than the SDSS and its coverage (away from the plane of the Galaxy) will be almost 3 times that of SDSS. We expect a catalogue of over 100 million galaxies with a median redshift of 0.5, making it ideal for the study structure on the largest scales and possibly the local detection of the BAO signal.
I will present preliminary data from the ongoing analyses, including deep galaxy number counts from the MDS, tests of photometric redshifts, and the first results of cluster finding algorithms run on the multi-colour data.

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