论文标题
红色巨型分支恒星的风的积聚可能会揭示狮子座中的超大黑洞
Accretion from Winds of Red Giant Branch Stars May Reveal the Supermassive Black Hole in Leo I
论文作者
论文摘要
最近，通过动态测量值在矮人Galaxy Leo I.站立$ \ sim 2 $ sim simbh the sim by non none n none Sim $ g gasey $ g gasey $ g中，$ g gase $ g and $ g gasey $ g gasey $ g and $ g gase $ g gasibe $ g gase $ g gasey $ g gasey $ g gasibe $ g and $ g gasey $ g gasey $ g gasibe $ g gasey $ g gasibe $ g and $ g gasey $ g，这种检测可以深刻影响黑洞及其宿主的地层模型。我们建议，在SMBH的Bondi半径内，来自$ \ sim 100 $的恒星的风产生了相当大的吸积率，根据Stellar质量损失的价值，Eddington的比率在$ 9 \ times10^{ - 8} $和$ 9 \ times10^{ - 7} $中。这些速率是在以对流为主的积聚流（ADAF）模式下积聚的SMBH。在微波$ \ sim 0.1-1 $ thz（$ 300-3000 \，\ mathrm {μm} $）中，微波峰的预测光谱峰，并根据积聚率显示出更高能量的显着变化。我们预测，$ \ sim 0.1 $ mjy的无线电通量为$ 6 $ ghz，非常依赖于积聚属性。用Chandra，VLA和Alma进行深层成像可以确认SMBH的存在并限制其积聚流。
A supermassive black hole (SMBH) of $\sim 3\times 10^6 \, \rm M_\odot$ was recently detected via dynamical measurements at the center of the dwarf galaxy Leo I. Standing $\sim 2$ orders of magnitude above standard scaling relations, this SMBH is hosted by a galaxy devoid of gas and with no significant star formation in the last $\sim 1$ Gyr. This detection can profoundly impact the formation models for black holes and their hosts. We propose that winds from a population of $\sim 100$ evolved stars within the Bondi radius of the SMBH produce a sizable accretion rate, with Eddington ratios between $9\times10^{-8}$ and $9\times10^{-7}$, depending on the value of the stellar mass loss. These rates are typical of SMBHs accreting in advection-dominated accretion flow (ADAF) mode. The predicted spectrum peaks in the microwaves at $\sim 0.1-1$ THz ($300-3000 \, \mathrm{μm}$) and exhibits significant variations at higher energies depending on the accretion rate. We predict a radio flux of $\sim 0.1$ mJy at $6$ GHz, mildly dependent on the accretion properties. Deep imaging with Chandra, VLA, and ALMA can confirm the presence of this SMBH and constrain its accretion flow.
