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 examine the merger stage of IRAS 03158+4227, one of the most luminousULIRGs from the IRAS 2 Jy sample. Deep optical images are presented along withhigh-resolution NIR images and optical low-resolution spectra. IRAS 03158+4227is confirmed as a component of an equal-luminosity binary galaxy with a nucleiseparation of 47 / (h/75) kpc. A long lopsided tail emanating from thecompanion, which harbours an active nucleus, is the most prominent peculiarfeature of the binary. The results of numerical simulations admit theinterpretation of this structure as a product of the tidal interaction betweenthe two components. If the infrared-activity of IRAS 03158+4227 is alsodynamically triggered by this process, this would implicate that the ULIRGphenomenon is not restricted to the final stage of a binary merger.Alternatively, the system may be a multiple merger where the partner(s)has/have already coalesced.

The merger stage of the ultra-luminous infrared galaxy IRAS 03158+4227