arXivDaily arXiv每日学术速递 周一至周五更新
arXiv 0803.4463astro-ph
收藏

大质量LSB星系中的恒星形成

Star Formation in Massive LSB Galaxies

K. O'Neil

摘要:

大质量低表面亮度星系的盘中心表面亮度至少比夜空暗一个星等,但总的星等和质量表明它们是已知最大的星系之一。像所有低表面亮度(LSB)星系一样,大质量LSB星系通常处于恒星形成过程中,但它们的恒星光仍然是漫射的,这就提出了恒星形成如何在这些系统中进行的问题。HI观测在研究LSB星系中发挥了至关重要的作用,因为它们通常非常富含气体。在过去的几年里,我们已经将大质量LSB星系的总数增加了四倍多,主要是通过HI调查。为了澄清它们的结构参数和恒星和气体含量,我们对这些神秘的系统进行了多波长研究。这项研究的结果,其中包括HI,CO,光学,近紫外和远紫外图像的星系,将提供最深入的研究,如何,何时,以及在哪里恒星形成过程中进行的这个独特的星系人口的子集。

英文摘要:

Massive low surface brightness galaxies have disk central surface brightnesses at least one magnitude fainter than the night sky, but total magnitudes and masses that show they are among the largest galaxies known. Like all low surface brightness (LSB) galaxies, massive LSB galaxies are often in the midst of star formation yet their stellar light has remained diffuse, raising the question of how star formation is proceeding within these systems. HI observations have played a crucial role in studying LSB galaxies as they are typically extremely gas rich. In the past few years we have more than quadrupled the total number of massive LSB galaxies,primarily through HI surveys. To clarify their structural parameters and stellar and gas content, we have undertaken a multi-wavelength study of these enigmatic systems. The results of this study, which includes HI, CO, optical, near UV, and far UV images of the galaxies, will provide the most in depth study done to date of how, when, and where star formation proceeds within this unique subset of the galaxy population.

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。

↑