BEGIN:VCALENDAR VERSION:2.0 CALSCALE:GREGORIAN PRODID:iCalendar-Ruby BEGIN:VEVENT CATEGORIES:Lectures & Presentations DESCRIPTION:The Physics & Astronomy Colloquium Series presents Annika Peter of The Ohio State University on “Testing the Nature of Dark Matter with Ga laxies” on Friday\, Feb. 26\, at 4:10 p.m. at an Online Departmental Colloq uium.\n\nJoin on your computer or mobile appClick here to join the meetingO r call in (audio only)+1 614-706-6572\,\,460474565# United States\, Colum bus Phone Conference ID: 460 474 565#Abstract: The nature of dark matter i s unknown. The leading paradigm for dark matter is that it consists of at l east one species of non-relativistic ("cold")\, weakly interacting particle s\, the cold dark matter (CDM) paradigm. One of the strongest predictions o f CDM is the hierarchy of structure down to Earth-mass scales. However\, in dividual self-bound clumps of dark matter--"halos"--are difficult to detect directly. Instead\, we use galaxies\, which grow at the centers of halos\, as lampposts for these halos. By counting galaxies\, we can measure the un derlying population of dark matter halos and test the nature of dark matter . \n\nIn this talk\, I describe two results that seem completely at odds w ith each other in measuring the population of small halos. I argue that th e resolution to the problem is a better mapping between galaxies and halos. I will show what my group is doing so far to address the problem\, and wha t opportunities lie ahead in the wide-field surveys of the 2020s. DTEND:20210226T221000Z DTSTAMP:20241124T092653Z DTSTART:20210226T211000Z LOCATION: SEQUENCE:0 SUMMARY:Physics Colloquium | Testing the Nature of Dark Matter with Galaxie s\, Feb. 26 UID:tag:localist.com\,2008:EventInstance_35714684939755 URL:https://calendar.ohio.edu/event/physics_colloquium_astronomy_feb_26 END:VEVENT END:VCALENDAR