The dwarf galaxy population in compact galaxy groups

致密星系群中的矮星系种群

• 批准号: 5357285
• 负责人: Professor Dr. Ralf-Jürgen Dettmar
• 金额: --
• 依托单位: Lehrstuhl für Astronomie
• 依托单位国家: 德国
• 项目类别: Research Grants
• 财政年份: 2001
• 资助国家: 德国
• 起止时间: 2000-12-31 至 2001-12-31
• 项目状态: 已结题
• 来源: https://gepris.dfg.de/gepris/projekt/5357285?language=en
• 关键词: dwarf; galaxy; population; compact; groups

We are going to investigate the dwarf galaxy population of compact groups with the help of deep broad band imaging in U, B, and R. It was originally supposed that these groups lack faint galaxies but dwarf galaxies have meanwhile been identified even in the central regions of compact groups. In order to determine the dwarf galaxy population especially in the outer regions we use the WWFPP ("Weit-Winkel-Fl/"achen-Photometer-Polarimeter") to cover a larger field. As it is assumed that the environment plays an important role in galaxy evolution, compact groups are unique. They possess densities which approximate galaxy densities of rich clusters or may even exceed it. We intend to compare the photometric, and morphological properties of dwarf galaxies in compact groups with dwarf galaxies in clusters, loose groups, and the field. With the help of the three filter bands we will be able to use photometric redshifts to exclude the higher redshift background galaxies. This allows us to isolate the local galaxy population belonging to the compact groups.

我们将借助U、B和R的深宽带成像来研究致密星系群中的矮星系群。最初的假设是这些星系群没有暗星系，但同时在致密星系群的中心区域也发现了矮星系。为了确定矮小星系的数量，特别是在外围区域，我们使用WWFPP(“Weit-Winkel-Fl/”achen-Photometer-Polarimeter“)来覆盖更大的区域。由于假设环境在星系演化中起着重要作用，致密群是独一无二的。它们的密度接近丰富星系团的星系密度，甚至可能超过它。我们打算比较紧凑星团中的矮小星系与星团、松散星团和视场中的矮小星系的光度学和形态特征。在这三个滤光带的帮助下，我们将能够使用光度学红移来排除红移较高的背景星系。这使我们能够分离出属于致密星系群的本地星系群体。