BEGIN:VCALENDAR VERSION:2.0 PRODID:IEEE vTools.Events//EN CALSCALE:GREGORIAN BEGIN:VTIMEZONE TZID:America/Los_Angeles BEGIN:DAYLIGHT DTSTART:20260308T030000 TZOFFSETFROM:-0800 TZOFFSETTO:-0700 RRULE:FREQ=YEARLY;BYDAY=2SU;BYMONTH=3 TZNAME:PDT END:DAYLIGHT BEGIN:STANDARD DTSTART:20261101T010000 TZOFFSETFROM:-0700 TZOFFSETTO:-0800 RRULE:FREQ=YEARLY;BYDAY=1SU;BYMONTH=11 TZNAME:PST END:STANDARD END:VTIMEZONE BEGIN:VEVENT DTSTAMP:20261013T012518Z UID:F903C024-8D1A-45CD-807C-6B397B288D32 DTSTART;TZID=America/Los_Angeles:20261020T103000 DTEND;TZID=America/Los_Angeles:20261020T113000 DESCRIPTION:21 cm cosmology -- the concept of using radio telescopes to obs erve the highly redshifted 21 cm line of neutral hydrogen on cosmological scales -- is a field with tremendous scientific potential. After nearly 20 years of experimental effort\, however\, a detection of the Epoch of Reio nization (EoR) signal remains elusive. The fundamental challenge is a sea of other astrophysical "foreground" emission nearly five orders of magnitu de stronger than the signal of interest\, although the past two decades ha ve revealed just how much the design of the instrument plays a role in com pounding this problem. This talk will review the status of the field\, inc luding the lessons learned from a now-concluded first generation of experi ments and updates from a second generation of experiments nearing completi on. I will particularly emphasize the work being done with the Murchison W idefield Array (MWA) and our efforts to address the worsening challenge of human generated radio-frequency interference (RFI). Even if successful\, however\, these second generation experiments will only be the beginning f or 21 cm cosmology\, and I will conclude by discussing future directions f or the field\, both on the ground and the lunar far side.\n\nCo-sponsored by: Min-Chang Lee\n\nSpeaker(s): Jonathan\, \n\nRoom: Conference Room 202\ , Bldg: Kenny Cottle Hall\, Boston College Newton Campus\, 885 Centre St\, Newton MA)\, Newton\, MA\, Massachusetts\, United States LOCATION:Room: Conference Room 202\, Bldg: Kenny Cottle Hall\, Boston Colle ge Newton Campus\, 885 Centre St\, Newton MA)\, Newton\, MA\, Massachusett s\, United States ORGANIZER:mclee@bu.edu SEQUENCE:0 SUMMARY:Detecting the Cosmic 21 cm Signal with Low-Frequency Radio Astronom y URL;VALUE=URI:https://events.vtools.ieee.org/m/584749 X-ALT-DESC:Description: <br /><p><span style="background-color: transparent \;" data-olk-copy-source="MessageBody">21 cm cosmology -- the concept of u sing radio telescopes to observe the highly redshifted 21 cm line of neutr al hydrogen on cosmological scales -- is a field with tremendous scientifi c potential.&nbsp\; &nbsp\;After nearly 20 years of experimental effort\, however\, a detection of the Epoch of Reionization (EoR) signal remains el usive.&nbsp\; The fundamental challenge is a sea of other astrophysical "f oreground" emission nearly five orders of magnitude stronger than the sign al of interest\, although the past two decades have revealed just how much the design of the instrument plays a role in compounding this problem.&nb sp\; This talk will review the status of the field\, including the lessons learned from a now-concluded first generation of experiments and updates from a second generation of experiments nearing completion.&nbsp\; I will particularly emphasize the work being done with the Murchison Widefield Ar ray (MWA) and our efforts to address the worsening challenge of human gene rated radio-frequency interference (RFI).&nbsp\; Even if successful\, howe ver\, these second generation experiments will only be the beginning for 2 1 cm cosmology\, and I will conclude by discussing future directions for t he field\, both on the ground and the lunar far side.</span></p> END:VEVENT END:VCALENDAR