Research Articles (Earth Sciences)

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Erratum: The frequency of very young galaxies in the local Universe: II. The view from SDSS spectra
(Oxford University Press, 2020) Mamon, Gary A; Trevisan, Marina; Thuan, Trinh Xuan
Only a handful of galaxies in the local Universe appear to be very young. We estimate the fraction of very young galaxies (VYGs), defined as those with more than half their stellar masses formed within the last Gyr. We fit non-parametric star formation histories (SFHs) to ∼280 000 galaxy spectra from a flux- and volume-limited subsample of the Main Galaxy Sample (MGS) of the SDSS, which is also complete in mass-to-light ratio, thus properly accounting for passive galaxies of a given mass. The VYG fractions decrease with increasing galaxy stellar mass, from ∼50 per cent at m = 108M to ∼0.1 per cent at m = 1011.5M , with differences of up to 1 dex between the different spectral models used to estimate the SFH and on how we treat aperture effects.
The origin of radio emission in broad absorption line quasars: Results from the Lofar Two-metre Sky Survey (Corrigendum)
(EDP Sciences, 2020) Morabito, Leah K.; Matthews, James H.; Best, Phillip N.
We report an erratum in Morabito et al. (2019, A&A, 622, A15). When calculating radio powers from observed flux densities, the wrong sign convention was used. This resulted in an underestimation of the radio powers by a median value of 0.6 dex and a maximum of 1 dex. The conclusions of the paper are unchanged.