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 the first systematic search for extended metal-line[OII]{\lambda}{\lambda}3726,3729 nebulae, or [OII] blobs (OIIBs), at z=1.2using deep narrowband imaging with a survey volume of 1.9x10^5 Mpc^3 on the0.62 deg^2 sky of Subaru-XMM Deep Survey (SXDS) field. We discover a giantOIIB, dubbed 'OIIB 1', with a spatial extent over ~75 kpc at a spectroscopicredshift of z=1.18, and also identify a total of twelve OIIBs with a size of>30 kpc. Our optical spectrum of OIIB 1 presents [NeV]{\lambda}3426 line at the6{\sigma} level, indicating that this object harbors an obscured type-2 AGN.The presence of gas outflows in this object is suggested by two marginaldetections of FeII{\lambda}2587 absorption and FeII*{\lambda}2613 emissionlines both of which are blueshifted at as large as 500-600 km/s, indicatingthat the heating source of OIIB 1 is AGN or associated shock excitation ratherthan supernovae produced by starbursts. The number density of OIIB 1-type giantblobs is estimated to be ~5x10^{-6} Mpc^{-3} at z~1.2, which is comparable withthat of AGNs driving outflow at a similar redshift, suggesting that giant OIIBsare produced only by AGN activity. On the other hand, the number density ofsmall OIIBs, 6x10^{-5} Mpc^{-3}, compared to that of z~1 galaxies in the bluecloud in the same M_B range, may imply that 3% of star-forming galaxies at z~1are quenching star formation through outflows involving extended [OII]emission.

First Systematic Search for Oxygen-Line Blobs at High Redshift: Uncovering AGN Feedback and Star-Formation Quenching