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

Low-metallicity, compact starburst galaxies referred to as Green Peas (GPs)provide a unique window to study galactic evolution across cosmic epochs. Inthis work, we present new deep optical spectra for three GPs from OSIRIS at the10m Gran Telescopio Canarias (GTC), which are studied using a state-of-the-artmethodology. A stellar population synthesis is conducted with 1098 spectraltemplates. The methodology succeeds at characterising stellar populations from0.5 Myrs to 10 Gyrs. The light distribution shows a large red excess from asingle population with $log\left(age\right) > 8.5yr$ in the GP sample analysed.This points towards an incomplete characterisation of the gas luminosity, whosecontinuum already accounts between $7.4\%$ and $27.6\%$ in the galaxy sample.The emission spectra are fitted with the largest Bayesian chemical modelconsisting of a electron temperature, a electron density, the logarithmicextinction coefficient and eleven ionic species under the direct methodparadigm. Additionally, building on previous work, we propose a neural networkssampler to constrain the effective temperature and ionization parameter of eachsource from photoionization model grids. Finally, we combine both methodologiesinto a 16-dimensional model, which for the first time, simultaneously exploresthe direct method and photoionization parameter spaces. Both techniquesconsistently indicate a low metallicity gas,$7.76<12+log\left(\frac{O}{H}\right)<8.04$, ionized by strong radiation fields,in agreement with previous works.

New insights on the nebular emission, ionizing radiation and low metallicity of Green Peas from advanced modelling