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 study the evolution of elliptical galaxies at z >~ 1 on the basis of asample of 247 Extremely Red Objects (EROs) with R-Ks >= 3.35 (AB) and Ks <=22.1 (AB) constructed from BVRi'z'JHKs multicolor data of a 114 arcmin2 area inthe Subaru/XMM Deep Survey Field. By fitting template spectra of oldellipticals (OEs) and young, dusty starbursts (DSs) to the multicolor data, weclassify EROs into these two classes and estimate their redshifts. We find that58% of the EROs in our sample belong to the OE class and that 24% of the OEsare fit by a spectrum having a disk component with the B-band bulge-to-totalluminosity ratio of <= 0.9. We compare the observed surface density of OEs withpredictions from passive evolution models. We then derive rest-frame B-bandluminosity functions (LFs) of OEs in our sample at z=1-1.5 and 1.5-2.5. We findthat the LF at z=1-1.5 roughly agrees with the LF of local ellipticals if adimming of 1.3 mag from z=1.25 to the present epoch is assumed. On the otherhand, the amplitude of the LF at z=1.5-2.5 is found to be lower than that ofthe local LF by a factor of ~ 3 over the whole range of magnitude observed.Taking account of a strong decrease in the number density of morphologicallyclassified early-type galaxies at z >~ 1.5 found by several authors, weconclude that the majority of ellipticals seen at present have not establishedeither a red color or a smooth 1/4-law profile before z ~ 1.5$. (abridged)Comment: 46 pages, 15 PostScript figures. Submitted to Ap

Evolution of Elliptical Galaxies at $z \gtrsim 1$ Revealed from a Large, Multicolor Sample of Extremely Red Objects