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X-WR-CALNAME:Cornell Department of Astronomy & Space Sciences Spring 2025 C
 olloquium Series
X-WR-TIMEZONE:Eastern Time (US & Canada)
BEGIN:VEVENT
DTSTAMP:20260911T101310Z
UID:tag:localist.com\,2008:EventInstance_48588506256338
DTSTART:20250121T203000Z
DTEND:20250121T213000Z
DESCRIPTION:“Charting the Gravitational-wave Universe at Light-year Wavel
 engths”\n\n \n\nAbstract: The Universe is thrumming with gravitational w
 aves. June 2023 brought the first evidence for an all-sky background of na
 nohertz-frequency gravitational waves\, discovered by collaborations inclu
 ding the North American Nanohertz Observatory for Gravitational Waves (NAN
 OGrav) and groups in Europe\, Australia\, India\, and China. This was an e
 ndeavor decades in the making\, requiring painstakingly precise timing obs
 ervations of scores of millisecond pulsars across the Milky Way using flag
 ship radio telescopes. While the results from separate groups are consiste
 nt with one another—and the leading interpretation of a population of su
 permassive black-hole binaries as the source—the observations provoke ma
 ny new questions. Do the results imply a population of binaries more massi
 ve than expected? What are the observational milestones as the first resol
 vable binary signals come into focus? Can we link these signals to host ga
 laxies through ranking protocols and by leveraging electromagnetic counter
 parts? And will our understanding of the gravitational-wave background hit
  a cosmic-variance barrier? In this talk\, I will chart the path to discov
 ery\, reflect on what we have learned during our year+ since our announcem
 ent\, and explore the exciting opportunities ahead—including the role of
  next-generation instruments like DSA-2000 in expanding our pulsar network
  to explore the low-frequency gravitational-wave landscape.
GEO:42.448891;-76.48114
LOCATION:Space Sciences Building\, 105
SUMMARY:Cornell Department of Astronomy & Space Sciences Spring 2025 Colloq
 uium Series
URL;VALUE=URI:https://events.cornell.edu/event/cornell-department-of-astron
 omy-space-sciences-spring-2025-colloquium-series-6273
CATEGORIES:Colloquium
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