OUP accepted manuscript
OUP accepted manuscript
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DOI：
10.1093/mnras/stab3310
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发表时间：
2021
影响因子：
4.8
通讯作者：
中科院分区：
文献类型：
--
作者：
作为LeMmingse-Merlin遗产调查的一部分，在1.5Ghz处观测到了统计完整的附近(<；120 Mpc)星系δ>；20°的全部280个Palomar样本。在这里，我们给出了这些星系中的213个星系核的ChandraX-射线观测，其中包括赤纬40°<；δ<；65°范围内的113个星系的统计完整子集。我们观测了各种光谱类型的星系，包括‘活跃’星系[如低电离核发射线区域(LINEs)和塞弗茨星系]和‘非活跃’星系(如$H星系和小星系)和吸收线星系(ALG)。我们测量的X射线通量极限是1.65亿×10−14erg S−1 cm−2(0.3−10 kev)。我们在15 0/2 13星系，包括13/14Seyfert星系、6 8/77星系、13/2 2星系和5 6/10 0星系中探测到了在核2角秒内重合的X射线辐射，但不能完全排除有核发光的源中非活动星系核过程的污染。我们构造了一个X射线光度函数，发现当包括所有活动星系核类型时，局地星系XLF可用斜率−0.5 4±0.0 6的单幂定律表示.塞弗特星系的爱丁顿比通常比LINER星系、ALGS星系和小星系高2−40年，后者大多是用爱丁顿比探测到的。利用文献[RMO，Small{RmO}，Small{III}线测量和黑洞质量，我们发现LININS，Small{RmH，Small{Ii}星系和ALGS与低光度具有相似的相关性，这表明一些‘非活动’星系可能存在活动星系核。
All 280 of the statistically complete Palomar sample of nearby (<120 Mpc) galaxies δ > 20° have been observed at 1.5 GHz as part of the LeMMINGse-MERLIN legacy survey. Here, we presentChandraX-ray observations of the nuclei of 213 of these galaxies, including a statistically complete sub-set of 113 galaxies in the declination range 40° <δ < 65°. We observed galaxies of all optical spectral types, including ‘active’ galaxies [e.g. low-ionization nuclear emission line regions (LINERs) and Seyferts] and ‘inactive’ galaxies like ${\rm H\, \small {II}}$ galaxies and absorption line galaxies (ALG). The X-ray flux limit of our survey is 1.65 × 10−14erg s−1cm−2(0.3−10 keV). We detect X-ray emission coincident within 2 arcsec of the nucleus in 150/213 galaxies, including 13/14 Seyferts, 68/77 LINERs, 13/22 ALGs and 56/100 ${\rm H\, \small {II}}$ galaxies, but cannot completely rule out contamination from non-AGN processes in sources with nuclear luminositieserg s−1. We construct an X-ray Luminosity function (XLF) and find that the local galaxy XLF, when including all active galactic nucleus (AGN) types, can be represented as a single power law of slope −0.54 ± 0.06. The Eddington ratio of the Seyferts is usually 2−4 decades higher than that of the LINERs, ALGs, and ${\rm H\, \small {II}}$ galaxies, which are mostly detected with Eddington ratios. Using [${\rm O\, \small {III}}$] line measurements and black hole masses from the literature, we show that LINERs, ${\rm H\, \small {II}}$ galaxies and ALGs follow similar correlations to low luminosities, suggesting that some ‘inactive’ galaxies may harbour AGN.