Events
DMS Statistics and Data Science Seminar |
| Time: Oct 29, 2020 (02:00 PM) |
| Location: ZOOM |
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Details: Speaker: Hyungsuk (Tak) Tak (Statistics & Astronomy and Astrophysics, Penn State) Title: Time Delay Cosmography Towards the Hubble Constant
Abstract: The Hubble constant is a core cosmological parameter that represents the current expansion rate of the Universe. However, estimates for this quantity have been inconsistent. Astronomers have been concerned about this inconsistency, developing various methods to estimate the Hubble constant independently. One such independent method is time delay cosmography. This method is based on strong gravitational lensing, an effect that multiple images of the same astronomical object appear in the sky because paths of the images (from the object to the Earth) are bent by the strong gravitational field of an intervening galaxy. This strong gravitational lensing produces two types of the data: multiple time series data of brightness and imaging data of lensing galaxy and lensed source. We use the time series data to infer time delays between the arrival times of the multiply-lensed images and the imaging data to estimate gravitational potential of the lensing galaxy. The Hubble constant can be estimated with these quantities. In this talk, I explain the relationship among these three components, i.e., time delays, gravitational potential, and the Hubble constant, introducing data analytic challenges and our collaborative efforts to overcome these challenges.
Seminar website: http://webhome.auburn.edu/~ezc0066/stat-datasci-seminar.html Join from PC, Mac, Linux, iOS or Android: https://auburn.zoom.us/j/93758346031 —————————————————————————————————————————————————————————— More details on the Zoom meeting. Elvan Ceyhan is inviting you to a scheduled Auburn University Zoom e-meeting. If you're a new participant, we have a quick start guide here: https://aub.ie/zoomquickstart
Topic: Statistics & Data Science Seminar Time: Oct 29, 2020 02:00 PM Central Time (US and Canada)
Join from PC, Mac, Linux, iOS or Android: https://auburn.zoom.us/j/93758346031 Connect using Computer/Device audio if possible.
Or Telephone: Meeting ID: 937 5834 6031 Dial: +1 646 876 9923 (US Toll) or +1 301 715 8592 (US Toll)
Or an H.323/SIP room system: H.323: 162.255.37.11 (US West) or 162.255.36.11 (US East) Meeting ID: 937 5834 6031
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