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 discovery and spectrophotometric characterization of a largesample of 164 faint ($i_{AB}$ $\sim$ $23$-$25$ mag) star-forming dwarf galaxies(SFDGs) at redshift $0.13$ $\leq z \leq$ $0.88$ selected by the presence ofbright optical emission lines in the VIMOS Ultra Deep Survey (VUDS). Weinvestigate their integrated physical properties and ionization conditions,which are used to discuss the low-mass end of the mass-metallicity relation(MZR) and other key scaling relations. We use optical VUDS spectra in theCOSMOS, VVDS-02h, and ECDF-S fields, as well as deep multiwavelengthphotometry, to derive stellar masses, star formation rates (SFR) and gas-phasemetallicities. The VUDS SFDGs are compact (median $r_{e}$ $\sim$ $1.2$ kpc),low-mass ($M_{*}$ $\sim$ $10^7-10^9$ $M_{\odot}$) galaxies with a wide range ofstar formation rates (SFR($H\alpha$) $\sim 10^{-3}-10^{1}$ $M_{\odot}/yr$) andmorphologies. Overall, they show a broad range of subsolar metallicities(12+log(O/H)=$7.26$-$8.7$; $0.04$ $\lesssim Z/Z_{\odot} \lesssim$ $1$). The MZRof SFDGs shows a flatter slope compared to previous studies of galaxies in thesame mass range and redshift. We find the scatter of the MZR partly explainedin the low mass range by varying specific SFRs and gas fractions amongst thegalaxies in our sample. Compared with simple chemical evolution models we findthat most SFDGs do not follow the predictions of a "closed-box" model, butthose from a gas regulating model in which gas flows are considered. Whilestrong stellar feedback may produce large-scale outflows favoring the cessationof vigorous star formation and promoting the removal of metals, younger andmore metal-poor dwarfs may have recently accreted large amounts of fresh, verymetal-poor gas, that is used to fuel current star formation.

Characterization of star-forming dwarf galaxies at 0.1 $\lesssim z \lesssim$ 0.9 in VUDS: Probing the low-mass end of the mass-metallicity relation