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19952026
most citedLimits on the time variation of the electromagnetic fine-structure constant in the low energy limit from absorption lines in the spectra of distant quasars

335 citations · 8.1k across the 221 of their papers we have counts for

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Showing 2013 · astro-ph.GAShow all

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astro-ph.GA2013★ 33 cited

21-cm absorption from galaxies at z ~ 0.3

N. Gupta, R. Srianand, P. Noterdaeme +2

We report the detection of 21-cm absorption from foreground galaxies towards quasars, specifically z_gal = 0.3120 towards SDSS J084957.97+510829.0 (z_qso = 0.584; Pair-I) and z_gal…