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

Aims. We study the analogy between local U/LIRGs and high-z massive SFGs bycomparing basic H{\alpha} structural characteristics, such as size, andluminosity (and SFR) surface density, in an homogeneous way (i.e. same tracerand size definition, similar physical scales). Methods. We use Integral FieldSpectroscopy based H{\alpha} emission maps for a representative sample of 54local U/LIRGs (66 galaxies). From this initial sample we select 26 objects withH{\alpha} luminosities (L(H{\alpha})) similar to those of massive (i.e. M\ast\sim 10^10 M\odot or larger) SFGs at z \sim 2, and observed on similar physicalscales. Results. The sizes of the H{\alpha} emitting region in the sample oflocal U/LIRGs span a large range, with r1/2(H{\alpha}) from 0.2 to 7 kpc.However, about 2/3 of local U/LIRGs with Lir > 10^11.4 L\odot have compactH{\alpha} emission (i.e. r1/2 < 2 kpc). The comparison sample of local U/LIRGsalso shows a higher fraction (59%) of objects with compact H{\alpha} emissionthan the high-z sample (25%). This gives further support to the idea that forthis luminosity range the size of the star forming region is a distinctivefactor between local and distant galaxies of similar SF rates. However, whenusing H{\alpha} as a tracer for both local and high-z samples, the differencesare smaller than the ones recently reported using a variety of other tracers.Despite of the higher fraction of galaxies with compact H{\alpha} emission, asizable group (\sim 1/3) of local U/LIRGs are large (i.e. r1/2 > 2 kpc). Theseare systems showing pre-coalescence merger activity and they areindistinguishable from the massive high-z SFGs galaxies in terms of theirH{\alpha} sizes, and luminosity and SFR surface densities.

astronomy and astrophysics

Integral Field Spectroscopy based H\alpha\ sizes of local Luminous and  Ultraluminous Infrared Galaxies. A Direct Comparison with high-z Massive Star  Forming Galaxies