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 a multi-wavelength analysis of galaxies selected at 450 and 850umfrom the deepest SCUBA-2 observations in the Extended Groth Strip (EGS) field,which have an average depth of sigma_450=1.9 and sigma_850=0.46 mJy/beam over~70 sq. arcmin. The final sample comprises 95 sources: 56 (59%) are detected atboth wavelengths, 31 (33%) are detected only at 850um, and 8 (8%) are detectedonly at 450um. We identify counterparts for 75% of the whole sample. Theredshift distributions of the 450 and 850um samples peak at different redshiftswith median values of z=1.66 +/- 0.18 and z=2.30 +/- 0.20, respectively.However, the two populations have similar IR luminosities, SFRs, and stellarmasses, with mean values of (1.5 +/- 0.2) x 10^12 L_sun, (150 +/- 20) M_sun/yr,and (9.0 +/- 0.6) x 10^10 M_sun, respectively. This places most of our sources(>85%) on the high-mass end of the `main-sequence' of star-forming galaxies.Exploring the IR excess vs UV-slope (IRX-beta) relation we find that the mostluminous galaxies are consistent with the Meurer law, while the less luminousgalaxies lie below this relation. Using the results of a two-dimensionalmodelling of the HST H_160-band imaging, we derive a median Sersic index ofn=1.4 +0.3 -0.1 and a median half-light radius of R_1/2 = 4.8 +/ 0.4 kpc. Basedon a visual-like classification in the same band, we find that the dominantcomponent for most of the galaxies at all redshifts is a disk-like structure,although there is a transition from irregular disks to disks with a spheroidalcomponent at z~1.4, which morphologically supports the scenario of SMGs asprogenitors of massive elliptical galaxies.

monthly notices of the royal astronomical society

The SCUBA-2 Cosmology Legacy Survey: The EGS deep field - II.  Morphological transformation and multi-wavelength properties of faint  submillimetre galaxies