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X-raying the galaxy pair Arp 41: no collision in NGC 1232 and three ultraluminous sources in NGC 1232A
Monthly Notices of the Royal Astronomical Society ( IF 4.8 ) Pub Date : 2021-02-23 , DOI: 10.1093/mnras/stab546
Roberto Soria 1, 2 , Manfred W Pakull 3
Affiliation  

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.

中文翻译:

对星系对 Arp 41 进行 X 射线扫描:NGC 1232 中没有碰撞,NGC 1232A 中的三个超发光源

我们与钱德拉一起研究了明显的星系对 NGC 1232/NGC 1232A,寻找相互作用和碰撞的证据。我们报告说,NGC 1232 中没有漫射云,这与文献中先前的说法相反。相反,我们发现小型“伴生”星系 NGC 1232A 包含三个超高亮度 X 射线源,其峰值亮度为 0.3-10 keV,高于 1040 erg s-1(假设该星系的宇宙学距离约为 93 Mpc)。就其质量、形态、金属丰度和明亮的 ULX 种群而言,NGC 1232A 类似于更近的晚型螺旋 NGC 1313。
更新日期:2021-02-23
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