The properties of the extended warm ionised gas around low-redshift QSOs and the lack of extended high-velocity outflows-猫眼课题宝

DOI：

10.1051/0004-6361/201220076

发表时间：

2012-10

期刊：

arXiv: Cosmology and Nongalactic Astrophysics

影响因子：

通讯作者：

中科院分区：

其他

文献类型：

作者：

B. Husemann;L. Wisotzki;S. S'anchez;K. J. U. Potsdam;Inst. de Astrof'isica de Andaluc'ia-Inst.-de-Astrof'isica-de-Andaluc'ia-102813830;Centro Astron'omico Hispano Alem'an de Calar Alto;M. F. Astronomie

本文详细分析了用积分场光谱法观测到的31个低红移、大部分为射电宁静的1型类星体的大样本，研究了它们的扩展发射线区（EELR）。我们专注于电离状态的气体，大小和亮度的扩展窄线区域（ENLR），这对应于那些部分的EELR为主的电离从类星体，以及电离气体的运动学。我们检测到的EELRs约19我们的31类星体（61%）后，解混未解决的类星体发射和扩展的主机星系光的积分场数据。我们确定了13个EELRs完全电离的类星体辐射，3个EELRs是由HII地区和3个EELRs显示签名的电离机制在不同的位置。ENLR的典型大小为10 kpc，核[OIII]的平均光度为log（L（[OIII]）/[erg/s]）=42.7+-0.15。我们表明，ENLR的大小至少是一个因素的2比确定与HST，但最近报道的2型类星体在匹配[OIII]光度是一致的。1型和2型类星体的ENLR似乎遵循相同的大小-光度关系。此外，我们第一次表明，ENLR的大小是更好地与类星体连续光度比与总/核[OIII]光度相关。我们发现ENLR光度和射电光度是相关的，并认为，即使在射电宁静类星体的射电喷流是重要的塑造ENLR的属性。引人注目的是，电离气体的运动学是静止的，在大多数情况下可能是引力驱动的，我们在EELR的特定区域只发现了3个径向气体速度超过400 km/s的物体，这些物体可以与射电喷流相关联。一般来说，这些都是显着较低的外流速度和检测率相比，星暴星系或射电响亮类星体。

(Abridged) We present a detailed analysis of a large sample of 31 low-redshift, mostly radio-quiet type 1 QSOs observed with integral field spectroscopy to study their extended emission-line regions (EELRs). We focus on the ionisation state of the gas, size and luminosity of extended narrow line regions (ENLRs), which corresponds to those parts of the EELR dominated by ionisation from the QSO, as well as the kinematics of the ionised gas. We detect EELRs around 19 of our 31 QSOs (61%) after deblending the unresolved QSO emission and the extended host galaxy light in the integral field data. We identify 13 EELRs to be entirely ionised by the QSO radiation, 3 EELRs are composed of HII regions and 3 EELRs display signatures of both ionisation mechanisms at different locations. The typical size of the ENLR is 10kpc at a median nuclear [OIII] luminosity of log(L([OIII])/[erg/s])=42.7+-0.15. We show that the ENLR sizes are least a factor of 2 larger than determined with HST, but are consistent with those of recently reported type 2 QSOs at matching [OIII] luminosities. The ENLR of type 1 and type 2 QSOs appear to follow the same size-luminosity relation. Furthermore, we show for the first time that the ENLR size is much better correlated with the QSO continuum luminosity than with the total/nuclear [OIII] luminosity. We show that ENLR luminosity and radio luminosity are correlated, and argue that radio jets even in radio-quiet QSOs are important for shaping the properties of the ENLR. Strikingly, the kinematics of the ionised gas is quiescent and likely gravitationally driven in the majority of cases and we find only 3 objects with radial gas velocities exceeding 400km/s in specific regions of the EELR that can be associate with radio jets. In general, these are significantly lower outflow velocities and detection rates compared to starburst galaxies or radio-loud QSOs.

The properties of the extended warm ionised gas around low-redshift QSOs and the lack of extended high-velocity outflows

文献摘要

被引文献

相似文献