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JWST vs HST PLRs: Cepheids in NGC 5584, N4258, Ap], accepted, arXiv:2307.15806 * JWST scatter 2.5 times less than HST at 1.5 microns, excellent agreement of intercepts . Photometry (Dr. Gagandeep Anand @ STScI) w/ Dolphot (ERS, JWST edition). Two scatter plots of magnitude vs the log of the period. Grey points are HST, red points are JWST. Both sets of points show a linear trend. The HST points have more scatter. You can see this in an inset image, where the stars seen in HST are much fuzzier than JWST.

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JWST vs HST PLRs: Cepheids in NGC 5584, N4258, Ap], accepted, arXiv:2307.15806 * JWST scatter 2.5 times less than HST at 1.5 microns, excellent agreement of intercepts . Photometry (Dr. Gagandeep Anand @ STScI) w/ Dolphot (ERS, JWST edition). Two scatter plots of magnitude vs the log of the period. Grey points are HST, red points are JWST. Both sets of points show a linear trend. The HST points have more scatter. You can see this in an inset image, where the stars seen in HST are much fuzzier than JWST.
https://cdn.masto.host/astrodonsocial/media_attachments/files/111/053/352/227/487/599/original/d99fed98b5154018.png

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Kelly Lepo (kellylepo@astrodon.social)'s status on Friday, 15-Sep-2023 02:19:21 JST Kelly Lepo
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Results out from Adam Riess, the Hubble Tension remains after observations of cepheid variable stars with JWST's clearer near-infrared view.
Measurements of the local value of the expansion rate of the universe (from the cosmic distance ladder) disagree with the rate you predict from measurements made in the early universe (CMB).
Blog post:
https://webbtelescope.org/contents/early-highlights/webb-confirms-accuracy-of-universes-expansion-rate-measured-by-hubble
#JWSTYearOne

In conversation about a year ago from astrodon.social permalink