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- W2905256521 abstract "We investigate the relation between stellar mass ( M ⋆ ) and specific stellar angular momentum ( j ⋆ ), or “Fall relation”, for a sample of 17 isolated, regularly rotating disc galaxies at z ∼ 1. All galaxies have rotation curves determined from H α emission-line data; HST imaging in optical and infrared filters; and robust determinations of their stellar masses. We use HST images in f814w and f160w filters, roughly corresponding to rest-frames B and I bands, to extract surface-brightness profiles for our systems. We robustly bracket j ⋆ by assuming that rotation curves beyond the outermost H α rotation point stay either flat or follow a Keplerian fall-off. By comparing our measurements with those determined for disc galaxies in the local universe, we find no evolution in the Fall relation in the redshift range 0 < z < 1, regardless of the band used and despite the uncertainties in the stellar rotation curves at large radii. This result holds unless stellar masses at z = 1 are systematically underestimated by ≳50%. Our findings are compatible with expectations based on a ΛCDM cosmological framework and support a scenario where both the stellar Tully–Fisher and mass-size relations for spirals do not evolve significantly in this redshift range." @default.
- W2905256521 created "2018-12-22" @default.
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- W2905256521 date "2019-01-01" @default.
- W2905256521 modified "2023-10-01" @default.
- W2905256521 title "The angular momentum of disc galaxies at <i>z</i> = <b>1</b>" @default.
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- W2905256521 doi "https://doi.org/10.1051/0004-6361/201834456" @default.
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