银河系中的恒星形成史（Arp 244）
Star Formation Histories within the Antennae Galaxies (Arp 244)
摘要：
本文利用GALEX、HST、2 MASS和Spitzer等卫星的影像，在MIPS 24 μ m（~6”）分辨率下，研究了最近的主合并原型星系-通过将MIPS 24微米尘埃排放纳入恒星星族分析，我们可靠地（尽管是粗略地）限制了这些24微米选定恒星形成区域的恒星形成历史。我们的人口分析是一致的恒星形成的情况下，在整个系统的大部分地区是在一个温和的恒星形成的水平，除了一些本地化的激烈的星暴网站在著名的重叠区域和北星系NGC 4038的西环区域。与所有其他区域相比，年轻的重叠区域（<1000万年）目前正在经历更剧烈的恒星形成增强。在整个重叠区域，我们建议两个连续的恒星形成路径，我们解释为两个合并磁盘的互穿过程的印记后，他们的第二次亲密接触。我们认为，在重叠区的南部和（特别是）西北边缘的恒星形成可能只是由星暴前的冲击触发的。在重叠区的中红外线热点也是一个4.5微米的热点，其总的4.5微米辐射（>=80%来自热尘埃和原子/分子谱线）与两个星系核的辐射相当。
英文摘要：
With the imagery from GALEX, HST, 2MASS, and Spitzer, and at the resolution of MIPS 24 micron(~6"), we study the variations of the broadband spectral energy distributions (SEDs) of star-forming regions within the nearest prototypal major merger -- the Antennae galaxies. By including MIPS 24 micron dust emission into stellar population analysis, we reliably, albeit roughly, constrain the star formation histories of these 24 micron selected star-forming regions across the merging disks of the Antennae. Our population analysis is consistent with the star formation scenario that, most regions across the whole system are at a modest level of star formation with the exception of some localized intense starburst sites in the well-known overlap regions and the western-loop regions of northern galaxy NGC 4038. Compared with all the other regions, the young overlap regions currently (<10 Myr) are experiencing much more violent enhancement of star formation. Across the overlap regions, we suggest two sequential star formation paths which we interpret as the imprints of the interpenetrating process of the two merging disks following their second close encounter. And we suggest that the star formation in the southern and (especially) northwestern edges of the overlap zone may have been just triggered by pre-starburst shocks. The well-known mid-infrared "hotspot" in the overlap regions is also a "hotspot" at 4.5 micron, whose total 4.5 micron emission (>=80% from both hot dust and atomic/molecular lines) is comparable with that of the two galactic nuclei.
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。
