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 report the discovery of a 20-kpc-sized H{\alpha} emission in SDSSJ083803.68+540642.0, a ringed dwarf galaxy (M$_V$ = -17.89 mag) hosting anaccreting intermediate-mass black hole at z=0.02957. Analysis of the HST imagesindicates that it is an early-type galaxy with a featureless low-surfacebrightness disk ({\mu}0 = 20.39 mag arcsec$^{-2}$ in the V band) and aprominent, relatively red bulge (V - I = 2.03, Re = 0.28 kpc or 0."48) thataccounts for ~81% of the total light in the I band. A circumgalactic ring of adiameter 16 kpc is also detected, with a disperse shape on its south side. Theoptical emission lines reveal the nucleus to be a broad-line LINER. Our MMTlongslit observation indicates that the kinematics of the extended H{\alpha}emission is consistent with a rotational gaseous disk, with a mean blueshiftedvelocity of 162 km s$^{-1}$ and mean redshifted velocity of 86 km s$^{-1}$ .According to our photoionization calculations, the large-scale H{\alpha}emission is unlikely to be powered by the central nucleus or by hot evolved(post-AGB) stars interspersed in the old stellar populations, but by in situstar formation; this is vindicated by the line-ratio diagnostic of the extendedemission. We propose that both the ring and large-scale H{\alpha}-emitting gasare created by the tidal accretion in a collision-and then merger-with agas-rich galaxy of a comparable mass.

A Ringed Dwarf LINER 1 Galaxy Hosting an Intermediate-mass Black Hole with Large-scale Rotation-like H{\alpha} Emission