The Search for the Topology of the Universe Has Just Begun. (arXiv:2210.11426v2 [astro-ph.CO] UPDATED)
<a href="http://arxiv.org/find/astro-ph/1/au:+Akrami_Y/0/1/0/all/0/1">Yashar Akrami</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Anselmi_S/0/1/0/all/0/1">Stefano Anselmi</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Copi_C/0/1/0/all/0/1">Craig J. Copi</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Eskilt_J/0/1/0/all/0/1">Johannes R. Eskilt</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Jaffe_A/0/1/0/all/0/1">Andrew H. Jaffe</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Kosowsky_A/0/1/0/all/0/1">Arthur Kosowsky</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Petersen_P/0/1/0/all/0/1">Pip Petersen</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Starkman_G/0/1/0/all/0/1">Glenn D. Starkman</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Gonzalez_Quesada_K/0/1/0/all/0/1">Kevin Gonz&#xe1;lez-Quesada</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Gungor_O/0/1/0/all/0/1">&#xd6;zen&#xe7; G&#xfc;ng&#xf6;r</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Saha_S/0/1/0/all/0/1">Samanta Saha</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Tamosiunas_A/0/1/0/all/0/1">Andrius Tamosiunas</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Taylor_Q/0/1/0/all/0/1">Quinn Taylor</a>, <a href="http://arxiv.org/find/astro-ph/1/au:+Vardanyan_V/0/1/0/all/0/1">Valeri Vardanyan</a> (COMPACT Collaboration)

Microwave background anomalies motivate further searches for cosmic topology.
For manifolds other than the simple 3-torus, existing searches allow the
shortest distance around the Universe to be much less than the distance to the
horizon. Yet, to explain anomalies, the shortest distance through us is likely
to just exceed the horizon size. While galaxy and 21cm surveys are potentially
more powerful, a more thorough microwave background search is merited as
previous ones considered only a subset of topologies and of their parameter
spaces. Current limits on topology are much weaker than generally understood.

Microwave background anomalies motivate further searches for cosmic topology.
For manifolds other than the simple 3-torus, existing searches allow the
shortest distance around the Universe to be much less than the distance to the
horizon. Yet, to explain anomalies, the shortest distance through us is likely
to just exceed the horizon size. While galaxy and 21cm surveys are potentially
more powerful, a more thorough microwave background search is merited as
previous ones considered only a subset of topologies and of their parameter
spaces. Current limits on topology are much weaker than generally understood.

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