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DTSTART:20240101T000000
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DTSTART;TZID=UTC:20240613T160000
DTEND;TZID=UTC:20240613T170000
DTSTAMP:20260414T183237
CREATED:20240604T215932Z
LAST-MODIFIED:20240604T215932Z
UID:2624-1718294400-1718298000@rpm.physics.lbl.gov
SUMMARY:Speaker: Brenda Frye (University of Arizona) - Title: Measuring the Hubble-Lemaitre Constant with James Webb Space Telescope Observations of the Lensed Supernova H0pe
DESCRIPTION:Research Progress Meeting \nDate: June 13\, 2024 \nTime: 4:00- 5:00 pm \nLocation: Sessler Conference Room- 50A-5132 [In-Person and HYBRID]  \nSpeaker: Brenda Frye (University of Arizona) \nTitle: Measuring the Hubble-Lemaitre Constant with James Webb Space Telescope Observations of the Lensed Supernova H0pe \nAbstract: A review of cluster lensing in the first two years of James Webb Space Telescope (JWST) observations is presented\, focussing on the JWST Guaranteed Time Observations (GTO) program the Prime Extragalactic Areas for Reionization and Lensing Science (PEARLS). These observations range from the spectacle of JWST “first light” images of the distant universe to dense galaxy cluster fields that uncovered unprecedented numbers of giant arcs and image multiplicities. A point-source was discovered in the PEARLS image of the galaxy cluster field PLCK G165.7+67.0 (G165) that is bright and appears in three different locations as a result of strong lensing. Additional JWST observations confirmed this source to be a normal Type Ia supernova (SN) at a redshift of 1.783 that we call “SN H0pe\,” making it one of the highest redshift standard candles. In a blinded approach\, seven independent lens models were constructed\, and time delays between the images were measured in two ways\, off of: (1) the light curve\, and (2) model fits to the spectra of each of the three SN images. During the unblinding event\, a value for H0 was inferred by rescaling the lens-model predicted time delays to match the measured time delays. This is only the second measurement of H0 by the method of a multiply-imaged supernova\, and the first by a standard candle. G165 has one of the highest rates of star formation summed up over the background lensed sources\, making continued monitoring potentially rewarding for the discovery of additional SNe. \nJoin Zoom Meeting \nhttps://lbnl.zoom.us/j/98854322464?pwd=K2tKUm1VZjRlV1J5RHE3cXdHQzRxdz09\n\nMeeting ID: 988 5432 2464\n\nPasscode: 142239
URL:https://rpm.physics.lbl.gov/event/speaker-brenda-frye-university-of-arizona-title-measuring-the-hubble-lemaitre-constant-with-james-webb-space-telescope-observations-of-the-lensed-supernova-h0pe/
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