论文标题
柠檬。 ii。 E-Merlin遗产对附近星系的调查。 Parsec量表上帕洛玛样品的最深无线电视图
LeMMINGs. II. The e-MERLIN legacy survey of nearby galaxies. The deepest radio view of the Palomar sample on parsec scale
论文作者
论文摘要
我们介绍了高分辨率（$ \ leq0.2 $ arcsec）的第二个数据释放1.5-GHz的无线电图像，该图像是帕洛马尔样本附近星系附近星系的177个无线电图像，作为lemmings的一部分（传统的e-Merlin阵列）（传统的e-Merlin多频段图）附近的Galaxy样品的一部分）调查。连同第一个Lemming数据释放的103个目标，这代表了280个局部活性（衬里和塞弗特）和非活动星系HII星系和吸收线星系的完整样本，ALG）。这个大计划是对本地宇宙的最深度无线电调查，$ \ gtrsim $ 10 $^{17.6} $ w hz $^{ - 1} $，不论主机和核型：我们检测到无线电排放$ \ gtrsim $ 0.25 mjy beam $ $^{ - 1} $ 100 $ 100 $ 100 $ 100 $ $ $ 280 $ 44.6 $ 44.6 $ 44.6 extim in 44.6 个人电脑。在这125个目标中，有106个目标显示了一个核心，该核心恰好在1.2 Arcsec与光学核之间重合。尽管我们主要观察到核心，但大约三分之一的检测到的星系具有喷射形态。样品的检测到的无线电核心仪表范围介于$ \ sim $ 10 $^{34} $和10 $^{40} $ erg s $^{ - 1} $之间。衬里和塞弗特是最发光的来源，而HII星系最少。衬里显示出周五的核心闪电无线电结构，而Seyfert则揭示了对称形态的最高部分。大多数HII星系都有单台芯或复杂的扩展结构，可能会掩盖核星爆和/或弱的活性核（其中七个显示出清晰的喷气机）。通常在进化的椭圆形中发现的ALG，尽管最少的椭圆形，但平均表现出最发光的无线电结构，类似于衬里。
We present the second data release of high-resolution ($\leq0.2$ arcsec) 1.5-GHz radio images of 177 nearby galaxies from the Palomar sample, observed with the e-MERLIN array, as part of the LeMMINGs (Legacy e-MERLIN Multi-band Imaging of Nearby Galaxy Sample) survey. Together with the 103 targets of the first LeMMINGs data release, this represents a complete sample of 280 local active (LINER and Seyfert) and inactive galaxies HII galaxies and Absorption Line Galaxies, ALG). This large program is the deepest radio survey of the local Universe, $\gtrsim$10$^{17.6}$ W Hz$^{-1}$, regardless of the host and nuclear type: we detect radio emission $\gtrsim$0.25 mJy beam$^{-1}$ for 125/280 galaxies (44.6 per cent) with sizes of typically $\lesssim$100 pc. Of those 125, 106 targets show a core which coincides within 1.2 arcsec with the optical nucleus. Although we observed mostly cores, around one third of the detected galaxies features jetted morphologies. The detected radio core luminosities of the sample range between $\sim$10$^{34}$ and 10$^{40}$ erg s$^{-1}$. LINERs and Seyferts are the most luminous sources, whereas HII galaxies are the least. LINERs show FRI-like core-brightened radio structures, while Seyferts reveal the highest fraction of symmetric morphologies. The majority of HII galaxies have single radio core or complex extended structures, which probably conceal a nuclear starburst and/or a weak active nucleus (seven of them show clear jets). ALGs, which are typically found in evolved ellipticals, although the least numerous, exhibit on average the most luminous radio structures, similar to LINERs.
