2021/02/17 by Roberto Soria, Manfred W. Pakull, M. W. Pakull
Physics and Astronomy · #Astronomy #Astrophysical Phenomena and Observations #Astrophysics #Dwarf galaxy #Galaxies: Formation, Evolution, Phenomena #Galaxy #Galaxy formation and evolution #Hubble sequence #Interacting galaxy #Irregular galaxy #Lenticular galaxy #Physics #Spiral galaxy #Stellar, planetary, and galactic studies #astro-ph.GA #astro-ph.HE
paper · pdf · doi:10.1093/mnras/stab546
8 pages, 3.5 MB, accepted by MNRAS (17 Feb 2021)
arxiv created 2021/02/17 · openalex publication_date 2021/02/23 · openalex created_date 2021/03/01 · arxiv updated 2021/03/10 · openalex updated_date 2026/08/05
ABSTRACT We studied the apparent galaxy pair NGC 1232/NGC 1232A with Chandra, looking for evidence of interactions and collisions. We report that there is no cloud of diffuse emission in NGC 1232, contrary to previous claims in the literature. Instead, we find that the small ‘companion’ galaxy NGC 1232A contains three ultraluminous X-ray sources with peak 0.3–10 keV luminosities above 1040 erg s−1 (assuming a cosmological distance of ≈93 Mpc for this galaxy). For its mass, morphology, metal abundance, and bright ULX population, NGC 1232A is analogous to the more nearby late-type spiral NGC 1313.