The Lyα and UV luminosity-dependent clustering of typical Lyα emitters up to z ~ 6
Abstract
The current consensus of galaxy formation is that it occurred inside dark matter halos and that galaxies continue to reside in their host halos up to the present-day. The main fundamental question that arises is how are galaxies evolving with their host halos? How much of a galaxy's evolution is driven by the properties of its host halo? In this talk, I will address these questions using a sample of ~ 4000 Lyα-selected emission line galaxies (LAEs) from the Slicing COSMOS 4K (SC4K) and ~ 1200 LAEs from archival NB497 imaging of SA22 split in 15 discrete redshift slices between z ~ 2.5 - 6. These samples are optimal for making clustering and halo property measurements as the narrowband imaging allows for reliable redshifts (based on emission line identification), the narrow redshift distributions removes the effects of redshift-space distortions, and the source selection picks up primarily star-forming galaxies. We find strong, redshift-independent trends between host halo mass and Lyα luminosity normalized by the characteristic Lyα luminosity, L*(z). We find a wide, dynamical range in halo masses with the faintest LAEs (L ~ 0.1 L*(z)) in 1010 M⊙ halos and the brightest LAEs (L ~ 7 L*(z)) in ~ 5 × 1012 M⊙ halos. Similar redshift-independent trends with halo mass are also observed in terms of 1500Å UV luminosity and dust-corrected UV star formation rates. The wide, dynamical range in halo masses suggests that LAEs are likely progenitors of a wide range of galaxies, from dwarf-like, to Milky Way-type, to bright cluster galaxies, making LAEs great tools in investigating the early formation and evolution of the galaxies we see in the local Universe. I will conclude this talk by discussing the implications of my results in terms of the importance of the host halo property in the overall evolution of LAEs.
- Publication:
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American Astronomical Society Meeting Abstracts #233
- Pub Date:
- January 2019
- Bibcode:
- 2019AAS...23314406K