Speaker
Description
The Hobby-Eberly Telescope Dark Energy Experiment(HETDEX) delivers an unprecedented catalog of over two million emission-line-selected galaxies through its untargeted IFU spectroscopic survey using the VIRUS spectrograph on the 10m HET. The first public data release(PDR1) includes approximately half a million [OII] emitters at z≤0.48, providing a unique and complementary probe of large-scale structure in the low-redshift universe. Leveraging HETDEX's high sensitivity and unbiased emission-line selection, we construct volume-limited subsamples of [OII] emitters with comoving number densities of 2-5x10^(-3)(h/Mpc)^3, a factor of five to ten higher than those of typical cosmological spectroscopic surveys. These volume-limited samples avoid the redshift-dependent selection biases inherent to flux-limited catalogs, simplifying the radial selection function and enabling more robust clustering measurements. We present the galaxy clustering analysis of these samples, discussing their cosmological implications with a HOD modeling of these samples.
| Other topic / keywords: | Observational cosmology, Large-scale structure of Universe, Galaxies |
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