BEGIN:VCALENDAR
VERSION:2.0
PRODID:-//LBNL Physics Division Research Progress Meetings - ECPv6.8.3//NONSGML v1.0//EN
CALSCALE:GREGORIAN
METHOD:PUBLISH
X-ORIGINAL-URL:https://rpm.physics.lbl.gov
X-WR-CALDESC:Events for LBNL Physics Division Research Progress Meetings
REFRESH-INTERVAL;VALUE=DURATION:PT1H
X-Robots-Tag:noindex
X-PUBLISHED-TTL:PT1H
BEGIN:VTIMEZONE
TZID:UTC
BEGIN:STANDARD
TZOFFSETFROM:+0000
TZOFFSETTO:+0000
TZNAME:UTC
DTSTART:20230101T000000
END:STANDARD
END:VTIMEZONE
BEGIN:VEVENT
DTSTART;TZID=UTC:20231121T160000
DTEND;TZID=UTC:20231121T170000
DTSTAMP:20260414T184254
CREATED:20231115T182235Z
LAST-MODIFIED:20231121T014055Z
UID:2420-1700582400-1700586000@rpm.physics.lbl.gov
SUMMARY:Speaker: Roohi Dalal (Princeton) - Title: New Cosmology Constraints from the Hyper Suprime-Cam Year 3 Data Release
DESCRIPTION:Research Progress Meeting \nDate: November 21\, 2023 \nTime: 4:00- 5:00 pm \nLocation: Sessler Conference Room- 50A-5132 [In-Person and HYBRID]  \nSpeaker: Roohi Dalal (Princeton) \nTitle: New Cosmology Constraints from the Hyper Suprime-Cam Year 3 Data Release\n \nAbstract: The Hyper Suprime-Cam (HSC) survey is the deepest present-day weak lensing experiment\, going to ~26 mag with exquisite image quality. This combination of depth and image quality achieved by HSC allows us to probe cosmology using weak gravitational lensing up to high redshifts\, and these analyses serve as important preparatory studies for the next generation of weak lensing surveys\, particularly the Vera C. Rubin Observatory. I will discuss our constraints on cosmological parameters using weak lensing cosmic shear power spectra measured from the Year 3 shear catalog of HSC\, covering 416 square degrees of the northern sky. I will describe our cosmological analysis\, including the steps we take to prevent confirmation bias as well as our modeling of various systematic effects. The quantity best constrained by our analysis is the parameter S8\, which describes the clumpiness of the matter distribution in the universe. From our analysis\, and other weak lensing analyses with different surveys\, there is a 2-3 sigma detection of a tension in the S8 measurements from weak lensing and those from the cosmic microwave background. While this could suggest that our cosmological model is incomplete\, I will discuss ongoing and future work that can further shed light on this tension\, including an improved modeling of baryonic feedback at small scales. \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-roohi-dalal-princeton-title-new-cosmology-constraints-from-the-hyper-suprime-cam-year-3-data-release/
END:VEVENT
END:VCALENDAR