论文标题
OH Megamaser Galaxy IRAS11506-3851：多波长观察结果揭示了AGN和星形。
The OH Megamaser galaxy IRAS11506-3851: an AGN and starformation revealed by multiwavelength observations
论文作者
论文摘要
我们提出了双子座多对象光谱仪（GMOS）积分场单元（IFU），哈勃太空望远镜（HST）和OH Megamaser（OHM）Galaxy IRAS 11506-3851的非常大的阵列（VLA）观测值。 HST图像揭示了一个孤立的螺旋星系，并与GMOS-IFU通量分布和VLA数据结合在一起，使我们能够识别围绕核的恒星形成区域的部分环，半径约为500 pc。虽然该环显示出Stanburst激发和低速分散体，但环内部的区域显示出更高的激发和速度分散值，并且从核的240 pc上朝着其边界增加，类似于预测的气泡。该气泡的增强激发和速度分散围绕着8.5 GHz无线电发射结构，在淡淡的AGN中支撑其起源，该淡淡的AGN大多通过目前阶段的无线电中的血浆射血而震惊周围的气体。这是我们到目前为止研究的5欧姆星系中的第四个（从我们的15欧姆样本中），GMOS-IFU数据表明该细胞核存在先前未知的微弱AGN，这与Ohm ohm Galaxies harbor最近触发AGN的假设一致。
We present Gemini Multi-Object Spectrograph (GMOS) Integral Field Unit (IFU), Hubble Space Telescope (HST) and Very Large Array (VLA) observations of the OH Megamaser (OHM) galaxy IRAS 11506-3851. The HST images reveal an isolated spiral galaxy and the combination with the GMOS-IFU flux distributions and VLA data allow us to identify a partial ring of star-forming regions surrounding the nucleus with a radius of ~ 500 pc. While this ring shows starburst excitation and low velocity dispersion, the region internal to the ring shows higher excitation and velocity dispersion values, with values increasing towards its borders at ~ 240 pc from the nucleus, resembling a projected bubble. The enhanced excitation and velocity dispersion of this bubble surrounds a 8.5 GHz radio emission structure, supporting its origin in a faint AGN that is mostly shocking the surrounding gas via a plasma ejection seen in radio at the present stage. This is the fourth of the 5 OHM galaxies we have studied so far (from our sample of 15 OHM) for which GMOS-IFU data indicate the presence of a previously unknown faint AGN at the nucleus, consistent with the hypothesis that OHM galaxies harbor recently triggered AGN.
