论文标题
最近的QSO MRK 231中的分子氧
Molecular Oxygen in the nearest QSO Mrk 231
论文作者
论文摘要
We report the detection of an emission feature at the 12 sigma level with FWHM line width of about 450 km/s toward the nearest quasi-stellar object, QSO Mrk 231. Based on observations with the IRAM 30 m telescope and the NOEMA Interferometer, the 11-10 transition of molecular oxygen is the likely origin of line with rest frequency close to 118.75 GHz. MRK 231中O2发射的速度与CO发射中看到的红翼相吻合，这表明它与流出的分子气体相关，该分子气体主要位于距中央AGN约10 kpc。对伽拉乳外分子氧的首次检测为研究AGN驱动的分子流出在动态时尺度上研究了MYR数十亿的时间尺度。 O2可能是由AGN驱动流出影响的这样区域中分子气体的重要冷却剂。需要新的星体化学模型来解释距离星系中心几个KPC中隐含的高分子氧丰度。
We report the detection of an emission feature at the 12 sigma level with FWHM line width of about 450 km/s toward the nearest quasi-stellar object, QSO Mrk 231. Based on observations with the IRAM 30 m telescope and the NOEMA Interferometer, the 11-10 transition of molecular oxygen is the likely origin of line with rest frequency close to 118.75 GHz. The velocity of the O2 emission in Mrk 231 coincides with the red wing seen in CO emission, suggesting that it is associated with the outflowing molecular gas, located mainly at about ten kpc away from the central AGN. This first detection of extragalactic molecular oxygen provides an ideal tool to study AGN-driven molecular outflows on dynamic time scales of tens of Myr. O2 may be a significant coolant for molecular gas in such regions affected by AGN-driven outflows. New astrochemical models are needed to explain the implied high molecular oxygen abundance in such regions several kpc away from the center of galaxies.
