论文标题
Dorado及其成员Galaxies II。 NGC 1533子结构的紫色图片
Dorado and its member galaxies II. A UVIT picture of the NGC 1533 substructure
论文作者
论文摘要
多拉多（Dorado）是南半球的附近（17.69 MPC）强劲发展的银河系。我们正在研究该组的恒星形成。本文提供了NGC 1533，IC 2038和IC 2039的FUV成像，该成像形成了Dorado Group Barycentre西南的子结构。 FUV CAF2-1 UVIT-ASTROSAT图像丰富了我们对Galex提供的系统的了解。与深度宽场，狭窄的halpha和21 cm无线电图像结合使用，我们搜索了在FUV形态中的相互作用机制的签名，并得出了恒星形成速率。 FUV光度曲线的形状表明在所有三个星系中都存在磁盘。在NGC 1533中，IC 2038的光学尺寸被检测到IC 2038的光学尺寸，在紧凑的结构中，NGC 1533中的明亮特征。一种微弱的FUV发射，没有光学的对应物，让人联想到NGC 1533郊区的HI结构，并扩展到IC 2038/2039/2039的局部背景。
Dorado is a nearby (17.69 Mpc) strongly evolving galaxy group in the Southern Hemisphere. We are investigating the star formation in this group. This paper provides a FUV imaging of NGC 1533, IC 2038 and IC 2039, which form a substructure, south west of the Dorado group barycentre. FUV CaF2-1 UVIT-Astrosat images enrich our knowledge of the system provided by GALEX. In conjunction with deep optical wide-field, narrow-band Halpha and 21-cm radio images we search for signatures of the interaction mechanisms looking in the FUV morphologies and derive the star formation rate. The shape of the FUV luminosity profile suggests the presence of a disk in all three galaxies. FUV emission is detected out to the optical size for IC 2038, and in compact structures corresponding to Halpha and HII bright features in NGC 1533. A faint FUV emission, without an optical counterpart, reminiscent of the HI structure that surrounds the outskirts of NGC 1533 and extends up to IC 2038/2039, is revealed above the local background noise.
