(abridged) A Chandra observation of the X-ray bright group NGC 5044 shows that the X-ray emitting gas has been strongly perturbed by recent outbursts from the central AGN and also by motion of the central dominant galaxy relative to the group gas. The NGC 5044 group hosts many small radio quiet cavities with a nearly isotropic distribution, cool filaments, a semi-circular cold front and a two-armed spiral shaped feature of cool gas. A GMRT observation of NGC 5044 at 610 MHz shows the presence of extended radio emission with a "torus-shaped" morphology. The largest X-ray filament appears to thread the radio torus, suggesting that the lower entropy gas within the filament is material being uplifted from the center of the group. The radio emission at 235 MHz is much more extended than the emission at 610 MHz, with little overlap between the two frequencies. One component of the 235 MHz emission passes through the largest X-ray cavity and is then deflected just behind the cold front. A second detached radio lobe is also detected at 235 MHz beyond the cold front. All of the smaller X-ray cavities in the center of NGC 5044 are undetected in the GMRT observations. Since the smaller bubbles are probably no longer momentum driven by the central AGN, their motion will be affected by the group "weather" as they buoyantly rise outward. Hence, most of the enthalpy within the smaller bubbles will likely be deposited near the group center and isotropized by the group weather. The total mechanical power of the smaller radio quiet cavities is $P_c = 9.2 \times 10^{41}$erg s$^{-1}$ which is sufficient to suppress about one-half of the total radiative cooling within the central 10 kpc. This is consistent with the presence of H$α$ emission within this region which shows that at least some of the gas is able to cool.
Cosmic Ray Spallation in Radio-Quiet Active Galactic Nuclei: A Case Study of NGC 4051
我们调查的条件和后果spiritual在无线电安静的塞弗特星系。这项工作的动机是最近发现的显着线发射在5.44 keV的朱雀数据从NGC 4051。新谱线的能量表明它是Cr I Ka发射，然而这条谱线比从具有宇宙丰度的物质中预期的要强得多，这导致了由于来自活性核的低能宇宙射线导致Fe的核散射而增强的建议。我们发现，最高的丰度增强很可能发生在气体的平面外的吸积盘和时间尺度的spiritual可能是短短的几年。在射电宁静的塞弗特星系中存在强烈的宇宙射线核通量的建议特别令人感兴趣，因为最近皮埃尔俄歇天文台的数据表明，超高能宇宙射线可能起源于这种来源。
