寻找星系外的恒星形成：HCG100群内介质的多波长分析
Searching for Star Formation Outside Galaxies: Multiwavelength Analysis of the Intragroup Medium of HCG100
摘要：
我们使用多波长数据（HI，FUV，NUV，R）来寻找希克森致密群100的群内介质中恒星形成的证据。我们发现，年轻的恒星形成区位于银河系际HI云的紧凑组延伸到超过130千秒差距远离主星系。一个潮汐矮星系候选者位于HI尾的密集区域，距离最亮的星系群成员61 kpc，其年龄估计只有330万年。在GALEX FUV图像中和包含HI尾部的10'x10'视场内检测到15个其他组内HII区域和TDG候选物。它们的年龄小于2亿年，HI质量为10^（9.2-10.4）Msun，0.001< SFR <0.01 Msun yr^-1，恒星质量为10^4.3- 10^6.5 Msun。HI云的云柱密度比N（HI）~10^21 cm^-2低一个数量级，其中许多HI云与之相关。
英文摘要：
We used multiwavelength data (HI, FUV, NUV, R) to search for evidence of star formation in the intragroup medium of the Hickson Compact Group 100. We find that young star-forming regions are located in the intergalactic HI clouds of the compact group which extend to over 130 kpc away from the main galaxies. A tidal dwarf galaxy candidate is located in the densest region of the HI tail, 61 kpc from the brightest group member and its age is estimated to be only 3.3 Myr. Fifteen other intragroup HII regions and TDG candidates are detected in the GALEX FUV image and within a field 10'x10' encompassing the HI tail. They have ages <200 Myr, HI masses of 10^(9.2-10.4) Msun, 0.001< SFR <0.01 Msun yr^-1, and stellar masses 10^4.3--10^6.5 Msun. The HI clouds to which many of them are associated have column densities about one order of magnitude lower than N(HI)~10^21 cm^-2.
机构、总结、中文摘要均由AI分析而来，可能存在错误，请以论文正文为准。
