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

We present IR and UV photometry for a sample of brightest cluster galaxies(BCGs). The BCGs are from a heterogeneous but uniformly characterized sample,the Archive of Chandra Cluster Entropy Profile Tables (ACCEPT), of X-ray galaxyclusters from the Chandra X-ray telescope archive with published gastemperature, density, and entropy profiles. We use archival GALEX, Spitzer, and2MASS observations to assemble spectral energy distributions (SEDs) and colorsfor BCGs. We find that while the SEDs of some BCGs follow the expectation ofred, dust-free old stellar populations, many exhibit signatures of recent starformation in the form of excess UV or mid-IR emission, or both. We establish amean near-UV to 2MASS K color of 6.59 \pm 0.34 for quiescent BCGs. We use thismean color to quantify the UV excess associated with star formation in theactive BCGs. We use fits to a template of an evolved stellar population andlibrary of starburst models and mid-IR star formation relations to estimate theobscured star formation rates. Many of the BCGs in X-ray clusters with lowcentral gas entropy exhibit enhanced UV (38%) and mid-IR emission (43%), abovethat expected from an old stellar population. These excesses are consistentwith on-going star formation activity in the BCG, star formation that appearsto be enabled by the presence of high density, X-ray emitting gas in the thecore of the cluster of galaxies. This hot, X-ray emitting gas may provide theenhanced ambient pressure and some of the fuel to trigger the star formation.This result is consistent with previous works that showed that BCGs in clusterswith low central gas entropy host H{\alpha} emission-line nebulae and radiosources, while clusters with high central gas entropy exhibit none of thesefeatures. UV and mid-IR measurements combined provide a complete picture ofunobscured and obscured star formation occurring in these systems.

Infrared and Ultraviolet Star Formation in Brightest Cluster Galaxies in the ACCEPT Sample