English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

Aims: We estimate stellar masses of galaxies in the high redshift universewith the intention of determining the influence of newly available Spitzer/IRACinfrared data on the analysis. Based on the results, we probe the mass assemblyhistory of the universe.  Methods: We use the GOODS-MUSIC catalog, which provides multiband photometryfrom the U--filter to the 8 mum Spitzer band for almost 15,000 galaxies witheither spectroscopic (for ~7 % of the sample) or photometric redshifts, andapply a standard model fitting technique to estimate stellar masses. We thenrepeat our calculations with fixed photometric redshifts excluding Spitzerphotometry and directly compare the outcomes to look for systematic deviations.Finally we use our results to compute stellar mass functions and mass densitiesup to redshift z = 5.  Results: We find that stellar masses tend to be overestimated on average iffurther constraining Spitzer data are not included into the analysis. Whilstthis trend is small up to intermediate redshifts z < 2.5 and falls within thetypical error in mass, the deviation increases strongly for higher redshiftsand reaches a maximum of a factor of three at redshift z = 3.5. Thus, up tointermediate redshifts, results for stellar mass density are in good agreementwith values taken from literature calculated without additional Spitzerphotometry. At higher redshifts, however, we find a systematic trend towardslower mass densities if Spitzer/IRAC data are included.

The impact of Spitzer infrared data on stellar mass estimates - and a revised galaxy stellar mass function at 0 < z < 5