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arXiv 0908.3495astro-ph.CO
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基于自适应光学的亮红外星系的成星特性和动力学

Star formation properties and dynamics of Luminous Infrared Galaxies with adaptive optics

Petri Vaisanen, Seppo Mattila, Stuart Ryder

摘要:

近红外自适应光学观测对于解释运动学和动力学数据以及研究通常非常多尘的相互作用亮红外星系(LIRGs)内的恒星形成特性至关重要。近红外AO数据也需要在明亮的尘埃中心区域找到超新星,并充分描述在这些系统中发现的年轻星团。我们已经使用AO在K波段调查样品的LIRG在0.1弧秒(30至100 pc)的分辨率。这些数据与SALT和AAT光谱随访以及HST和Spitzer存档成像合并。报告了第一个AO检测到的SNe以及第一个研究的LIRG的详细信息。其中一个LIRG在相互作用中显示出意想不到的第三种成分,而且这是最活跃的恒星形成。另一个目标在近红外光谱中显示了一种非常罕见的前旋臂的证据,当旋臂打开时,旋臂以相同的方向旋转。

英文摘要:

Near infrared adaptive optics observations are crucial to be able to interpret kinematic and dynamical data and study star formation properties within the often extremely dusty interacting luminous IR galaxies (LIRGs). NIR AO data are also needed to find supernovae in their bright and dusty central regions and to fully characterize the young stellar clusters found in these kinds of systems. We have used AO in the K-band to survey a sample of LIRGs at 0.1 arcsec (30 to 100 pc) resolution. The data are merged with SALT and AAT spectroscopic follow-up and HST and Spitzer archival imaging. The first AO detected SNe are reported as well as details of the first studied LIRGs. One LIRG showed an unexpected third component in the interaction, which moreover turned out to host the most active star formation. Another target showed evidence in the NIR of a very rare case of leading spiral arms, rotating in the same direction as the arms open.

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