首页> 外文期刊>The Astrophysical journal >SPIRAL INFLOW FEEDING THE NUCLEAR STARBURST IN M83, OBSERVED IN Hα EMISSION WITH THE GHαFaS FABRY-PEROT INTERFEROMETER
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SPIRAL INFLOW FEEDING THE NUCLEAR STARBURST IN M83, OBSERVED IN Hα EMISSION WITH THE GHαFaS FABRY-PEROT INTERFEROMETER

机译:在GHαFaS法布里-珀罗干涉仪的Hα发射中观察到,M83中的核星暴引起螺旋流入

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摘要

We present observations of the nearby barred starburst galaxy M83 (NGC 5236), with the new Fabry-Perot interferometer GHαFaS mounted on the 4.2 m William Herschel Telescope on La Palma. The unprecedented high-resolution observations, of 16 pc FWHM~(-1), of the Hα-emitting gas cover the central 2 kpc of the galaxy. The velocity field displays the dominant disk rotation with signatures of gas inflow from kpc scales down to the nuclear regions. At the inner inner Lindblad resonance radius of the main bar and centered at the dynamical center of the main galaxy disk, a nuclear (5.5 ± 0.9) × 10~8 solar mass rapidly rotating disk with scale length of 60 ± 20 pc has formed. The nuclear starburst is found in the vicinity as well as inside this nuclear disk, and our observations confirm that gas spirals in from the outer parts to feed the nuclear starburst, giving rise to several star formation events at different epochs, within the central 100 pc radius of M83.
机译:我们用新的法布里-珀罗干涉仪GHαFaS装在拉帕尔玛的4.2 m威廉·赫歇尔望远镜上,展示了附近禁止星爆的星系M83(NGC 5236)的观测结果。发射Hα气体的16 pc FWHM〜(-1)的空前高分辨率观测结果覆盖了银河系中心的2 kpc。速度场显示主导的盘旋转,并带有从kpc尺度向下到核区域的气体流入特征。在主棒内部的内部Lindblad共振半径处,并以主星系盘的动力中心为中心,形成了一个核的(5.5±0.9)×10〜8太阳质量的快速旋转盘,其尺度长度为60±20 pc。在该核盘附近以及内部都发现了核爆炸,我们的观察结果证实,气体从外部螺旋旋进来供给核爆炸,在中心100 pc内的不同时期引发了几次恒星形成事件。半径为M83。

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