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Are there any more "proofs" of an accelerated expansion of the universe other than:

$1:$ that galaxies that are farther away from us are also more redshifted.

$2:$ using "Baryon acoustic oscillations" to compare the sound horizon today with the sound horizon at the time of decoupling (using the CMB)?

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    $\begingroup$ There are details in the red shifts such as absorption lines from intergalactic hydrogen dust that would be hard to explain if not for universal expansion $\endgroup$
    – shai horowitz
    Commented Feb 25, 2021 at 9:39
  • $\begingroup$ I mean proof for accelerated expansion, not expansion. I realize my title was misleading. I appreciate the answer though! $\endgroup$
    – Marcus M
    Commented Feb 25, 2021 at 10:02
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    $\begingroup$ I assume you mean 'evidence for' or 'argument for', rather than 'proof'? $\endgroup$
    – Eletie
    Commented Feb 25, 2021 at 10:51
  • $\begingroup$ Yes. Thank you. $\endgroup$
    – Marcus M
    Commented Feb 25, 2021 at 11:31

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Apologies if you know this already but your point 1 is unclear.

More distant galaxies being more red shifted than closer ones is evidence of expansion, not accelerated expansion. Uniform expansion would give this too. The evidence for accelerated expansion is that the relationship is not linear at greater distances. The redshift is actually less than you might expect for the more distant galaxies relative to their measured distance.

This article gives a good overview: https://www.pnas.org/content/96/8/4224

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