No S8 Tension at Low Redshift & Large Scales!? - ACT Lensing X unWISE Galaxies (Farren & Krolewski)

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*Index to Key Parts of the Talk* [00:00] Shaun's intro [01:06] Overview comments by Gerrit and Alex [03:31] Two things to remember from this talk [04:40] Motivations for this work [07:41] Measuring S8 with galaxy-CMB lensing cross-correlations [09:16] New ACT DR6 X unWISE spectra (Fig. 3 from paper) [12:03] Q&A: Advantages of using UnWISE vs eBOSS in this work [13:13] Background: defining the unWISE sample [18:21] Background: previous unWISE-Planck results [19:08] Clustering redshifts for unWISE [21:00] Improving the galaxy sample: updated redshift distribution [22:24] Mitigating systematic density fluctuations [25:59] Modelling improvements: Redshift marginalisation (Fig. 17) [27:45] Modelling improvements: The power spectrum model [29:36] Series of systematics tests: Data null-tests [31:06] Series of systematics tests: Simulation driven tests (Fig. 12) [31:58] Series of systematics tests: Parameter consistency tests (Fig. 21) [32:28] Cosmology from ACT DR6 Lensing X unWISE (Fig. 19) [35:33] Reanalysing Planck Lensing X unWISE: MC norm correction [36:47] Reanalysing Planck Lensing X unWISE: Planck PR4 lensing [37:16] Reanalysing Planck Lensing X unWISE: summary of changes [38:12] Reanalysing Planck Lensing X unWISE: Cosmology [40:22] Joint constraints from ACT DR6 and Planck PR4 X unWISE (Fig. 23) [41:12] Comparing to other analyses (Fig. 23) [45:09] Future CMB lensing cross-correlations [50:51] What current work in cosmology is particularly underappreciated by the community?