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首页> 外文期刊>The Astrophysical journal >HUBBLE SPACE TELESCOPE ULTRAVIOLET SPECTROSCOPY OF NGC 1741: A NEARBY TEMPLATE FOR DISTANT ENERGETIC STARBURSTS
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HUBBLE SPACE TELESCOPE ULTRAVIOLET SPECTROSCOPY OF NGC 1741: A NEARBY TEMPLATE FOR DISTANT ENERGETIC STARBURSTS

机译：NGC 1741的望远镜空间望远镜紫外光谱：遥远的模板，用于远距离的能量星暴

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摘要

We have obtained a Hubble Space Telescope ultraviolet image and spectrum of the nearby Wolf-Rayet galaxy NGC 1741. The spatial morphology from the Faint Object Camera image is dominated by two main starburst centers, each being about 100 times as luminous as 30 Doradus. Both starburst centers are composed of several intense knots of recent star formation. A Goddard High Resolution Spectrograph spectrum of a portion of the southern starburst center is consistent with a population of young stars following a Salpeter IMF for masses above ～15 solar mass(lower mass stars may also be present) and extending up to ～100 solar mass; about 10~4 O-type stars are inferred from the UV luminosity. Numerous strong interstellar lines are detected. Although not resolved, their strength suggests that they are formed in individual bubbles and shells with velocities up to a few hundred km s~(-1). The red wing of the Lyα absorption profile indicates the presence of several neutral hydrogen components, one in our own Galaxy and the others at or close to the distance of NGC 1741. Overall, the stellar and interstellar line spectrum, as well as the continuum shape of NGC 1741, strongly resembles star-forming galaxies recently discovered at high redshift.
机译：我们获得了哈勃太空望远镜的紫外图像和附近的Wolf-Rayet星系NGC 1741的光谱。微弱天体相机图像的空间形态主要由两个主要的星爆中心控制，每个中心的发光度约为30 Doradus的100倍。两个星爆中心都由最近恒星形成的几个强烈结组成。南部星爆中心的戈达德高分辨率光谱仪光谱与萨尔珀特IMF之后质量大于或等于15太阳质量（也可能存在质量较低的恒星）并扩展到约100太阳质量的年轻恒星数量一致;从紫外光度可以推断出约10〜4个O型恒星。可以检测到许多强的星际线。尽管尚未解决，但它们的强度表明它们是由速度高达几百公里s〜（-1）的单个气泡和壳形成的。 Lyα吸收曲线的红色翅膀表示存在几种中性氢成分，一种存在于我们自己的星系中，另一种处于或接近NGC 1741的距离。总体而言，恒星和星际线谱以及连续体形状NGC 1741的星系非常类似于最近在高红移中发现的恒星形成星系。

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