Detection of the Cosmological Time Dilation of High Redshift Quasars · HackerPapers discussions

Detection of the Cosmological Time Dilation of High Redshift Quasars — mentioned by raattgift

Thu, 24 Aug 2023 16:04:56 GMT

> I don't have access to the paper https://arxiv.org/abs/2306.04053 Someone usually posts up a preprint in discussions where the original link is a summary put out by one of the authors' institutions' public relations department and published unchanged or made even worse by some aggregator site's editing. You can also install the Unpaywall extension which gives you a one-click button to (usually preprints of) a large proportion of freshly published papers (it works on more than half of astrophysics-related papers). http://unpaywall.org/ is one of the best things on the Internet. > it would…

Paper and discussion history. A mention is not an endorsement.

Detection of the Cosmological Time Dilation of High Redshift Quasars — mentioned by raattgift

Thu, 24 Aug 2023 13:34:45 GMT

Your question about pulsars is a good one and I'll answer it first, but the study at the top is about quasars, and I'll address that further below. With one exception all known pulsars are in the Milky Way; they are too intrinsically dim (and obscured by dust, much of which is local to them, produced in their progenitor star's explosive demise) to see them at extragalactic distances. The exception is PSR J0540-6919 in the Large Magellanic Cloud (the LMC, a satellite galaxy to the Milky Way), which is atypically bright in gamma rays and so is visible to the Fermi-GLAST telescope in low Earth…

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Detection of the Cosmological Time Dilation of High Redshift Quasars — mentioned by adrian_b

Thu, 24 Aug 2023 05:17:02 GMT

Free research paper: https://arxiv.org/abs/2306.04053

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Detection of the Cosmological Time Dilation of High Redshift Quasars — mentioned by nopassrecover

Tue, 04 Jul 2023 02:04:23 GMT

> Quasar 'clocks' show the universe was five times slower soon after the Big Bang ... By observing quasars, this time horizon has been rolled back to just a tenth the age of the universe, confirming that the universe appears to speed up as it ages. This seems like an incorrect summation of both the research and one of the researcher's quotes. I believe this is the paper: https://arxiv.org/pdf/2306.04053.pdf The researcher quote I presume inspired the article headline was: "Looking back to a time when the universe was just over a billion years old, we see time appearing to flow five times…

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Detection of the Cosmological Time Dilation of High Redshift Quasars — mentioned by raattgift

Mon, 03 Jul 2023 21:29:28 GMT

The Nature Astronomy paper linked by The Guardian corresponds with the arXiv version https://arxiv.org/abs/2306.04053 "Whilst this time dilation has been unambiguously detected in the light curves exhibited by cosmologically distant supernovae, the appearance of time dilation in other cosmic sources [has been] less conclusive" "This paper presents the detection of the cosmological dependence of the time dilation in a recent sample of almost two hundred quasars [...] in multiple wavebands over a two-decade period." "In closing, we note that the lack of detection of the time dilation of quasar…

Paper and discussion history. A mention is not an endorsement.