Black holes orbiting the supermassive black hole (SMBH) Sgr A* in the Galactic center (GC) of the Milky Way generate gravitational waves (GW). The resulting spectrum, due to stars and black holes (BHs), is continuous below 40 nHz while individual BHs within about 200 AU of the central SMBH stick out in the spectrum at higher frequencies. The GWs can be detected by timing radio pulsars within a few parsecs of this region. Future observations with the Square Kilometer Array of such pulsars with sufficient timing accuracy may be sensitive to signals from intermediate mass BHs (IMBH) in a 3 year observation baseline. The recent detection of radio pulsations from the magnetar SGR J1745-29 very near the GC opens up the possibilities of detecting millisecond pulsars (which can be used as probes of the GWs) through lines of sight with only moderate pulse and angular broadening due to scattering.
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机译：黑洞绕银河系（GC）中的超迹象黑洞（SMBH）SGR A *产生引力波（GW）。由于恒星和黑洞（BHS），所得到的光谱是连续的40nHz，而在较高频率的频谱中，在大约200 AU内的单个BHS。可以通过在该区域的几个Parsec中定时无线脉冲条件来检测GW。未来与平方公里的这种脉冲条件的观察具有足够的定时精度可以在3年观察基线中对来自中间质量BHS（IMBH）的信号敏感。最近从GC的磁场SGRJ1745-29检测到GC附近的无线电脉动打开了通过仅具有中等脉冲和由于散射而导致的角度扩展的视线来检测毫秒脉冲节（可用作GWS探针）的可能性。
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