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DTSTART:20240101T000000
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DTSTART;TZID=UTC:20241112T160000
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SUMMARY:Speaker: Claire Lamman (Harvard) - Title: Untangling the Cosmic Web: Correlations between small-scale clustering and large-scale structure
DESCRIPTION:Research Progress Meeting \nDate: November 12\, 2024 \nTime: 4:00- 5:00 pm  \nLocation: Sessler Conference Room- 50A-5132 [In-Person and HYBRID]  \nSpeaker: Claire Lamman (Harvard) \nTitle: Untangling the Cosmic Web: Correlations between small-scale clustering and large-scale structure \nAbstract: Gravitational forces from the largest structures in the Universe leave a detectable imprint on galaxies and their local environment. I will present a new approach to tracing the tidal field using these correlations: the intrinsic alignment of small groups of galaxies\, or “multipelts”. Multiplets mostly consist of 2-4 galaxies within 1 Mpc/h of each other\, and we measure their orientations relative to the galaxy-traced tidal field. Using spectroscopic redshfits from the DESI Y1 survey\, we detect intrinsic alignment out to projected separations of 100 Mpc/h and beyond redshift 1. We find a simillar signal regardless of galaxy luminosity or color\, which could make multiplet alignment a useful tool for mapping the direction of the tidal field and any cosmological effects which impact it. Our detection demonstrates that galaxy clustering in the non-linear regime of structure formation preserves an interpretable memory of the large-scale tidal field. \n \nJoin Zoom Meeting\nhttps://lbnl.zoom.us/j/95679892182?pwd=RU5xU2dDRFNabnR1U3pQMklkYWFIdz09 \nMeeting ID: 956 7989 2182 \nPasscode: 169037
URL:https://rpm.physics.lbl.gov/event/speaker-claire-lamman-harvard-title-untangling-the-cosmic-web-correlations-between-small-scale-clustering-and-large-scale-structure/
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