论文标题
带有千帕斯克尺度无线电结构的无线电广播AGN宿主星系中恒星形成的明显抑制
Significant Suppression of Star Formation in Radio-Quiet AGN Host Galaxies with Kiloparsec-Scale Radio Structures
论文作者
论文摘要
我们进行了22〜GHz 1“ JVLA成像，对100个无线电广播X射线进行了从Swift-Bat调查中选出的AGN。我们发现，AGN驱动的Kiloparsec尺度的无线电结构与11 AGN中的纯星形形成不一致。这些AGN的宿主星系在这些AGN的宿主星系中显着地躺在恒星序列下，表明全球构造的托管体形趋向于partoters star sater starty sater star and partor startials and the射线级别。主机的形成速率受到影响。 σ_*$。
We conducted 22~GHz 1" JVLA imaging of 100 radio-quiet X-ray selected AGN from the Swift-BAT survey. We find AGN-driven kiloparsec-scale radio structures inconsistent with pure star formation in 11 AGN. The host galaxies of these AGN lie significantly below the star-forming main sequence, indicating suppressed star formation. While these radio structures tend to be physically small compared to the host galaxy, the global star formation rate of the host is affected. We evaluate the energetics of the radio structures interpreted first as immature radio jets, and then as consequences of an AGN-driven radiative outflow, and compare them to two criteria for successful feedback: the ability to remove the CO-derived molecular gas mass from the galaxy gravitational potential and the kinetic energy transfer to molecular clouds leading to $v_\mathrm{cloud} > σ_*$. In most cases, the jet interpretation is insufficient to provide the energy necessary to cause the star formation suppression. Conversely, the wind interpretation provides ample energy in all but one case. We conclude that it is more likely that the observed suppression of star formation in the global host galaxy is due to ISM interactions of a radiative outflow, rather than a small-scale radio jet.
