Time-delay cosmography: the present and the future

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• Simon Birrer, Stanford University
• Wednesday 06 April 2022, 14:00-15:00
• Physics West Lecture Theatre 117.

If you have a question about this talk, please contact Nathan Steinle.

The arrival time delays of multiply imaged strong gravitationally lensed sources provides a one-step cosmological distance measurement. The methodology, known as time-delay cosmography, rose to prominence to provide precise measurements of the Hubble constant, independent of the local distance ladder and the cosmic microwave background. I introduce the methodology and key ingredients, as well as possible systematics. I will then highlight the progress made in the last decade, present the recent results obtained, and present an outlook in the near future.

This talk is part of the Astrophysics Talks Series series.

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• Astrophysics Talks Series
• Bham Talks
• Physics West Lecture Theatre 117
• What's on in Physics?

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