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 Plus monthly

Global: Zendy Tools annual

Global: Zendy Tools monthly

Global: Zendy Free Plan

We present resolved GMRT HI observations of the high gas-phase metallicitydwarf galaxy WISEA J230615.06+143927.9 (z = 0.005) (hereafter J2306) andinvestigate whether it could be a Tidal Dwarf Galaxy (TDG) candidate. TDGs areobserved to have higher metallicities than normal dwarfs. J2306 has an unusualcombination of a blue g -- r colour of 0.23 mag, irregular optical morphologyand high-metallicity (12 + log(O/H) = 8.68$\pm$0.14), making it an interestinggalaxy to study in more detail. We find J2306 to be an HI rich galaxy with alarge extended, unperturbed rotating HI disk. Using our HI data we estimatedits dynamical mass and found the galaxy to be dark matter (DM) dominated withinits HI radius. The quantity of DM, inferred from its dynamical mass, appears torule out J2306 as an evolved TDG. A wide area environment search reveals J2306to be isolated from any larger galaxies which could have been the source of itshigh gas metallicity. Additionally, the HI morphology and kinematics of thegalaxy show no indication of a recent merger to explain the high-metallicity.Further detailed optical spectroscopic observations of J2306 might provide ananswer to how a seemingly ordinary irregular dwarf galaxy achieved such a highlevel of metal enrichment.

HI in high gas-phase metallicity dwarf galaxy WISEA J230615.06+143927.9