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 Tools annual

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 monthly

Global: Zendy Plus monthly

Presents the access of premium content as premium feature

Premium Content

Global: Zendy Plus annual

Global: Zendy Free Plan

We analyze central surface brightness mu_0, nuclear and global colors ofintermediate redshift disk galaxies. On an apparent-diameter limited sample of398 galaxies from ACS/HST Great Observatories Origins Deep Survey North(GOODS-N), we find 131 galaxies with bulges and 214 without. Up to z ~ 0.8,blue, star-forming nuclei are found in galaxies with low mu_0 only; allhigh-mu_0 nuclei show red, passive colors, so that nuclear and global (U - B)colors strongly correlate with central surface brightness, as found in thelocal Universe. At 0.8 < z < 1.3, a fraction ~ 27% of the high-surfacebrightness nuclei show blue colors, and positive nuclear color gradients. Theassociated nuclear star formation must lead to bulge growth inside disks.Population modeling suggests that such blue bulges evolve into localpseudobulges rather than classical bulges. We do not find evidence forrejuvenation of classical bulges at the sampled z. High luminosity AGNs becomecommon at 0.8 < z < 1.3, perhaps pointing to a role of AGN in the growth orstar formation truncation of bulges.

The nature of growing bulges within z < 1.3 galaxy disks in the GOODS-N field