Accretion mode versus radio morphology in the LOFAR Deep Fields
Accretion mode versus radio morphology in the LOFAR Deep Fields
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LOFAR 深场中的吸积模式与射电形态
DOI：
10.1093/mnras/stac140
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发表时间：
2022
影响因子：
4.8
通讯作者：
Mingo B
中科院分区：
文献类型：
--
作者：
Mingo B
射电响亮的活动星系有两种吸积模式[辐射低效（RI）和辐射高效（RE）]，具有不同的光学和红外特征，以及两种喷流动力学行为，在角秒到角分分辨率的射电巡天中主要表现为中心或边缘增亮的结构[Fanaroff-Riley（FR）I级和II级]。吸积模式与射电形态（FR 类）之间关系的本质一直是长期争论的话题。我们对 LOFAR 两米巡天深场 (LoTSS-Deep) 首次数据发布中的 286 个高分辨率射电星系样本对这种关系进行了全面调查，并对其进行了稳健的形态和吸积模式分类。我们发现三分之二的发光 FRII 射电星系是 RI，并且发现 RI 和 RE FRII 的视觉外观或源动态范围（峰值/平均表面亮度）没有显着差异，这表明 RI 和 RE 系统都可以产生 FRII 结构。我们还发现了大量的低光度 FRII（主要是 RI），支持了我们之前的结论，即 FRII 射电结构可以在所有射电光度下产生。我们证明，在两种形态都存在的光度范围内，产生 FRI 或 FRII 射电形态的概率与恒星质量直接相关，而在所有形态和光度中，RE 吸积发生在具有高特定恒星形成率的系统中，大概是因为这追踪了燃料的可用性。综上所述，吸积模式与射电形态之间的关系非常间接，宿主星系环境以不同的方式控制这两个关键参数。
Radio-loud active galaxies have two accretion modes [radiatively inefficient (RI) and radiatively efficient (RE)], with distinct optical and infrared signatures, and two jet dynamical behaviours, which in arcsec- to arcmin-resolution radio surveys manifest primarily as centre- or edge-brightened structures [Fanaroff–Riley (FR) class I and II]. The nature of the relationship between accretion mode and radio morphology (FR class) has been the subject of long debate. We present a comprehensive investigation of this relationship for a sample of 286 well-resolved radio galaxies in the LOFAR Two-metre Sky Survey Deep Fields (LoTSS-Deep) first data release, for which robust morphological and accretion mode classifications have been made. We find that two-thirds of luminous FRII radio galaxies are RI, and identify no significant differences in the visual appearance or source dynamic range (peak/mean surface brightness) of the RI and RE FRIIs, demonstrating that both RI and RE systems can produce FRII structures. We also find a significant population of low-luminosity FRIIs (predominantly RI), supporting our earlier conclusion that FRII radio structures can be produced at all radio luminosities. We demonstrate that in the luminosity range where both morphologies are present, the probability of producing FRI or FRII radio morphology is directly linked to stellar mass, while across all morphologies and luminosities, RE accretion occurs in systems with high specific star formation rate, presumably because this traces fuel availability. In summary, the relationship between accretion mode and radio morphology is very indirect, with host-galaxy environment controlling these two key parameters in different ways.
欧洲大面积 ISO 调查：最新结果
DOI：
10.1007/3-540-45553-1_4
发表时间：
2000
期刊：
arXiv: Astrophysics
影响因子：
--
作者：
S. Oliver;S. Serjeant;A. Efstathiou;H. Crockett;C. Gruppioni;F. Franca;M. Rowan;the Elais consortium
通讯作者：
the Elais consortium