[Physics-grads-open] Fwd: AURORA Astro Webinar: The Shape of Space: Hunting for the Topology of the Universe

[Pradyumna Sadhu]

Hello everyone,
Everyone is welcome to tomorrow's webinar! We believe it would be of
interest to anyone working on cosmology or related topics.

Regards,
Prady

---------- Forwarded message ---------
From: AURORA at UCR <aurora.ucr at gmail.com>
Date: Sat, May 17, 2025 at 10:33 AM
Subject: AURORA Astro Webinar: The Shape of Space: Hunting for the Topology
of the Universe
To: <all-ucr-astro at googlegroups.com>, <aurora_ucr at googlegroups.com>


Dear UCR Astronomy and Physics Faculty, Postdocs and Graduate students,

We are excited to host another *AURORA Astro Webinar* presented by Dr.
Yashar Akrami <https://www.yashar-akrami.com> from Institute for
Theoretical Physics (IFT) UAM-CSIC <https://www.ift.uam-csic.es/en/front>,
*Madrid*. He will be presenting remotely via Zoom, but we invite you to
gather *in person *in the *Pierce Observing** room* to join the talk
together.

*Title*: "*The Shape of Space: Hunting for the Topology of the Universe**"*

*When*: *Tues**day, May 20th, 2025, at 11:00 AM*
*Where*: *Pierce Observing Room* (Join us for coffee and cookies starting
at 10:45 AM)

*Abstract*: Measuring the topology of the Universe — its shape — would be a
truly remarkable physics accomplishment as we would know the full extent of
space and we would map the entire Cosmos. The search for cosmic topology
has compelling motives beyond our curiosity about this fundamental property
of the Universe. Discovery of non-trivial topology would have enormous
implications for the theory of quantum gravity and would require
significant rethinking of the earliest moments of cosmic history. Cosmic
topology may also, perhaps uniquely, explain the observed anomalous
large-angle features in the cosmic microwave background (CMB).
Observational searches, using the CMB, have so far considered only a small
subset of testable topologies, and current limits on the topology scale are
much weaker than generally understood. For generic topologies, off-diagonal
correlations between microwave background harmonic coefficients over a wide
range of scales encode significant topological information. In Fourier
space, probed in detail by future galaxy and 21cm surveys, these
correlations are expected to hold true even if the topology scale
substantially exceeds the diameter of the observable Universe. I describe
an ambitious program to exhaustively search for cosmic topology in current
and future cosmological data.


*We encourage everyone to join us in person* *for a shared, interactive
experience. *If you can’t make it in person, you’re welcome to join us on
Zoom using this link:

Join Zoom Meeting
<https://ucr.zoom.us/j/98019542455?pwd=A8M71O2w40xGYwqGYfj60iRhaASp9N.1>


We really *hope* to see you there!


Clear Skies,

*The AURORA team*

[image: yashar-akrami.png]







-- 
Astronomy Union for Reading, Outreach, and Research Activities
Graduate Student Organization
Department of Physics and Astronomy | UC Riverside

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