arXivDaily arXiv每日学术速递 周一至周五更新
arXiv周末暂无论文更新,休息一下吧,周末愉快~~
arXiv 0912.0247astro-ph.GA
收藏

环落星系NGC 6503中强端棒的证据

Evidence for a Strong End-On Bar in the Ringed Sigma-Drop Galaxy NGC 6503

E. Freeland, L. Chomiuk, R. Keenan, T. Nelson

摘要:

我们使用WIYN高分辨率红外相机(WHIRC)H(1.6微米)波段成像,档案斯皮策,HST和GALEX数据,模拟和文献中的数据来论证附近的螺旋星系NGC 6503中存在一个强大的端棒。证据包括光度和运动学签名,以及共振结构中存在的星系,这是最经常与酒吧。这些包括一个中心峰值,然后在表面亮度曲线的高原,在中央恒星速度色散(西格玛下降)的极端递减,以及存在的内环以及螺旋结构的环核盘。在这个框架中,先前发现的恒星形成环是一个年轻的内环,直径上由强大的端棒跨越。

英文摘要:

We use WIYN High-resolution Infrared Camera (WHIRC) H (1.6 micron) band imaging, archival Spitzer, HST, and GALEX data, simulations and data from the literature to argue for the presence of a strong end-on bar in nearby spiral galaxy NGC 6503. The evidence consists of both photometric and kinematic signatures as well as resonant structures present in the galaxy which are most often associated with bars. These include a central peak followed by a plateau in the surface brightness profile, an extreme decrement in the central stellar velocity dispersion (a sigma-drop), and the presence of an inner ring as well as a circumnuclear disk with spiral structure. In this framework the previously identified nuclear star-forming ring is instead a young inner ring spanned in diameter by the strong end-on bar.

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。

↑