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Journal Club Seminars From 2019 - 2020

Contents


FALL 2019


October 4, 2019

NOTE: CASS All-Hands Meet & Greet

 CASS All-Hands Meet & Greet this Friday, October 4, from 12:00 to 1:00 pm in SERF 383. This meeting will be an opportunity for new members of CASS to introduce themselves and present a quick overview of their research. It will also give established members of CASS a chance to summarize their recent work. New graduate students are especially encouraged to attend. Pizza and soda will be provided. Journal Club is an informal environment in which graduate students can give short talks on any subject of interest to them, be it a recent paper, their own research, or any other topic. Talks will resume next week. All are welcome to attend.



October 11, 2019

Mark Devlin (12:00-1:00)
Professor
UPenn



October 18, 2019

 "Quantum nonfluctuations"

Eric L. Michelsen (12:00-1:00)
Physics Lecturer
UCSD-CASS



November 1, 2019

 "Measuring the Hubble constant from time-delays of strongly lensed quasars"

Anowar Shajib (12:00-1:00)
PhD candidate, Astronomy and Astrophysics
UCLA

 The recent tension between early- and late-Universe measurements of the Hubble constant highlights the necessity for independent and precise probes such as the time-delay cosmography. The measured time-delays between the lensed images of a background quasar depend on the absolute physical scales in the lens configuration. Thus, the time-delays allow measurements of these scales to infer the Hubble constant, H_0. Due to a number of great advancements over the past decade in both the data quality and modeling techniques, the measurement of H_0 from the time-delays has fulfilled its promise to be competitive with other traditional methods such as the cosmic distance ladder. This is evident from the recent 2.4% blind measurement of H_0 from only six lenses (Wong et al. 2019). Simulation shows that a sample of nine lenses shrinks the uncertainty on this measurement to 2% (Shajib et al. 2018). I will present the Hubble constant measured from a newly analyzed lens system taking the sample size to seven. In addition, I will present the future roadmap of time-delay cosmography to independently reach 1% precision within a few years.



November 8, 2019

Daniel's Title: "Pulsar test of the universality of free fall"

Daniel Gonzales (12:00-12:30)
Physics Graduate Student
UCSD-CASS



November 15, 2019

Cameron Trapp (12:00-12:30)
Physics Graduate Student
UCSD-CASS



November 22, 2019

Azton Wells (12:00-12:30)
Physics Graduate Student
UCSD-CASS



November 29, 2019

NOTE: Thanksgiving holiday - No Journal Club



December 6, 2019

Jen Ito (12:00-12:30)
Physics Graduate Student
UCSD-CASS