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    New discovery about Distant Galaxies: Stars are more Massive than we thought

    May 31, 2022, Categories  Astronomy/Space

    New discovery about distant galaxies: Stars are heavier than we thought
    Left: best-fit temperature from 10 to 50 K vs. lookback time from a sample of 139,535 COSMOS2015 galaxies with S/N 10 in the V band (Laigle et al. 2016). At each redshift, the distribution is individually normalized in order to emphasize the temperature distribution at all redshifts. With increased redshift, fewer galaxies are fit at lower temperatures. Right: boxcar-smoothed mean with standard deviation of best-fit gas temperature at different lookback times (with mean determined from objects in 2 Gyr width age bins and not including galaxies fit at the bounds of temperature range). The mean temperature increases from ∼28 to ∼36 K from present to 12 Gyr, while the spread decreases. Credit: The European Physical Journal E (2022). DOI: 10.1140/epje/s10189-022-00183-5

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