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BEGIN:VEVENT
DTSTAMP:20260511T121921
DTSTART;TZID=America/Detroit:20260522T110000
DTEND;TZID=America/Detroit:20260522T120000
SUMMARY:Workshop / Seminar:Cosmo-Astro Seminar | Supernova Cousins: Leveraging Galaxy-group Information to Improve Type Ia Supernova Cosmology
DESCRIPTION:Type Ia supernovae (SNe Ia) are a cornerstone of precision cosmology\, but at low redshift their accuracy is increasingly limited by systematic uncertainties. This has gained urgency with recent results from the Dark Energy Spectroscopic Instrument suggesting possible cracks in the standard cosmological model\, including evolving dark energy. Among the dominant systematics are peculiar velocities\, which are tied to large-scale structure and environmental effects\, which are linked to galaxy evolution. Peculiar velocities have been studied through models of the velocity field and galaxy groups and clusters\, while environmental effects have been probed using rare \"supernova siblings\,\" multiple SNe Ia within the same host galaxy. These approaches\, however\, focus on either the motions of galaxies or the environment that these SNe go off in\, but not both at the same time. In this talk\, I introduce \"supernova cousins\": SNe Ia in different galaxies within the same group or cluster\, thereby combining both effects. Using a sample of 1\,086 low-z SNe Ia from ATLAS\, we construct a sample of 93 SN Cousins. With this sample\, I compare distance scatter across environments and test the limits of how well we can use them to improve SN cosmology.
UID:148214-21903333@events.umich.edu
URL:https://events.umich.edu/event/148214
CLASS:PUBLIC
STATUS:CONFIRMED
CATEGORIES:Faculty,Free,Physics
LOCATION:Randall Laboratory - 3246
CONTACT:
END:VEVENT
BEGIN:VEVENT
DTSTAMP:20260513T124418
DTSTART;TZID=America/Detroit:20260522T110000
DTEND;TZID=America/Detroit:20260522T120000
SUMMARY:Workshop / Seminar:Cosmo-Astro Seminar | Supernova Cousins: Leveraging Galaxy-group Information to Improve Type Ia Supernova Cosmology
DESCRIPTION:Type Ia supernovae (SNe Ia) are a cornerstone of precision cosmology\, but at low redshift their accuracy is increasingly limited by systematic uncertainties. This has gained urgency with recent results from the Dark Energy Spectroscopic Instrument suggesting possible cracks in the standard cosmological model\, including evolving dark energy. Among the dominant systematics are peculiar velocities which are tied to large-scale structure and environmental effects which are linked to galaxy evolution. Peculiar velocities have been studied through models of the velocity field and galaxy groups and clusters\, while environmental effects have been probed using rare “supernova siblings\,” multiple SNe Ia within the same host galaxy. These approaches\, however\, focus on either the motions of galaxies or the environment that these SNe go off in\, but not both at the same time. In this talk\, I introduce “supernova cousins”: SNe Ia in different galaxies within the same group or cluster\, thereby combining both effects. Using a sample of 1\,086 low-z SNe Ia from ATLAS\, we construct a sample of 93 SN Cousins. With this sample\, I compare distance scatter across environments and test the limits of how well we can use them to improve SN cosmology.
UID:148264-21903462@events.umich.edu
URL:https://events.umich.edu/event/148264
CLASS:PUBLIC
STATUS:CONFIRMED
CATEGORIES:Astronomy,Physics
LOCATION:Randall Laboratory - 3247 Neal Lab
CONTACT:
END:VEVENT
BEGIN:VEVENT
DTSTAMP:20260512T112510
DTSTART;TZID=America/Detroit:20270331T160000
DTEND;TZID=America/Detroit:20270331T170000
SUMMARY:Presentation:2027 Helmut W. Baer Lecture
DESCRIPTION:Prof. Abhay Deshpande works in experimental nuclear and high-energy physics. His current research includes various exploratory and precision studies in QCD using polarized proton-proton\, proton-nucleus\, and nucleus-nucleus beams of the Relativistic Heavy Ion Collider (RHIC) at Brookhaven National Laboratory on Long Island\, and high-intensity polarized electron beams of the recently upgraded Continuous Electron Beam Accelerator Facility (CEBAF) at Thomas Jefferson National Laboratory\, in Newport News\, Virginia. He has been deeply involved in the development of the science and promotion of the future Electron Ion Collider.
UID:148234-21903426@events.umich.edu
URL:https://events.umich.edu/event/148234
CLASS:PUBLIC
STATUS:CONFIRMED
CATEGORIES:Engineering,Faculty,Free,Graduate And Professional Students,Natural Sciences,Nuclear,Smoke-free,Undergrad Physics Events,Undergraduate Students
LOCATION:West Hall - 340
CONTACT:
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