• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>The Astrophysical journal >MID-INFRARED AND CO OBSERVATIONS OF THE INFRARED/X-RAY LUMINOUS SEYFERT 1 GALAXY NGC 985: THE MAKING OR BREAKING OF A ULIRG?
【24h】

MID-INFRARED AND CO OBSERVATIONS OF THE INFRARED/X-RAY LUMINOUS SEYFERT 1 GALAXY NGC 985: THE MAKING OR BREAKING OF A ULIRG?

机译：红外/ X射线发光塞夫银河系NGC 985的中间红外和共同观察：制造或破坏了ULIRG？

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

We describe Infrared Space Observatory (ISO) and BIMA observations of the z = 0.04 Seyfert 1 ring galaxy NGC 985 which suggest close parallels with some quasar host galaxies. NGC 985 contains two closely spaced nuclei embedded in an R~(1/4)-law stellar bulge and an outer ring, evidence of an ongoing merger. The system contains ～1.8 x 10~(10) solar mass of highly disturbed molecular gas which lies in an asymmetric barlike structure with the peak in observed CO column densities significantly offset from the compact double nucleus. In contrast to this, the ISO observations show strong dust emission centered on the active galactic nucleus (AGN), located in one of the two nuclei. Fainter CO, mid-infrared (MIR), and radio continuum emission provides a glimpse of the complexities of star formation in the outer ring. An analysis of the kinematics of the main CO emission reveals evidence for two dynamically distinct molecular components within NGC 985. The first is a set of isolated supergiant molecular clouds (SGMCs) which are concentrated within 9-10 kpc of the active nucleus. Although randomly distributed about the center, the clouds may form part of a clumpy highly disturbed disk which may be either just forming around double nucleus (the making of an ultraluminous infrared galaxy [ULIRG]) or alternatively in the process of being disrupted, perhaps as a result of a powerful nuclear outflow (the breaking of a ULIRG). A second major concentration of CO lies offset from the double nucleus in a dynamically coherent ridge of emission in which powerful star formation is occurring. We tentatively associate CO emission with two out of six UV absorption lines seen in the blue wing of the very broad Lyα emission. Such an association would imply a complex interrelationship between the nuclear CO cloud population in colliding systems and AGN-driven winds.
机译：我们描述了Z = 0.04 Seyfert 1环星系NGC 985的红外空间天文台（ISO）和BIMA观测，这暗示了与某些类星体宿主星系的相似之处。 NGC 985包含两个紧密间隔的原子核，该原子核嵌在R〜（1/4）律恒星凸出部分和一个外环中，表明正在进行合并。该系统包含〜1.8 x 10〜（10）太阳质量的高度受干扰的分子气体，该气体处于不对称的棒状结构中，观察到的CO柱密度的峰值明显偏离了紧密的双核。与此相反，ISO观测结果表明，强烈的尘埃排放集中在位于两个原子核之一中的活动银河原子核（AGN）上。较弱的CO，中红外（MIR）和连续射电辐射使您可以一窥外圈恒星形成的复杂性。对主要CO排放运动学的分析揭示了NGC 985中两个动态不同的分子成分的证据。第一个是一组孤立的超巨分子云（SGMC），它们集中在活动核的9-10 kpc范围内。尽管云绕中心随机分布，但它们可能形成块状高度受干扰的盘片，该盘片可能只是在双核周围形成（形成超发光红外星系[ULIRG]），或者正处于破裂过程中，也许是强大的核外流（ULIRG破裂）的结果。 CO的第二个主要浓度在动态相干的发射脊中偏离双核，在该处发生了强大的恒星形成。我们暂时将CO发射与非常宽的Lyα发射的蓝色翅膀中看到的六分之二的紫外线吸收线相关联。这种联系将意味着碰撞系统中的核CO云人口与AGN驱动的风之间存在复杂的相互关系。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号