论文标题
毫秒脉冲星修改静态星系中的无线电SFR相关性
Millisecond Pulsars Modify the Radio-SFR Correlation in Quiescent Galaxies
论文作者
论文摘要
观察到的星系的远红外和无线电亮度之间的相关性说明了恒星形成与宇宙射线产生之间的紧密联系。有趣的是，最近的伽马射线观测表明，回收/毫秒/毫秒（MSP）（MSP）也不追踪最近的恒星形成，也可能有效地加速了宇宙射线电子。我们研究了MSP对银河系非热无线电发射的贡献，发现它们可以主导大规模静态星系的发射。该模型可以解释最近的Lofar观察结果，这些观察结果发现星系中具有高恒星质量和恒星形态较低的星系中的无线电过量。我们表明，基于MSP的模型为Lofar数据提供了显着改善的拟合度。我们讨论了对无线电相关性，附近星系中无线电过量的观察以及局部电子和正电子观测的影响。
The observed correlation between the far-infrared and radio luminosities of galaxies illustrates the close connection between star formation and cosmic-ray production. Intriguingly, recent gamma-ray observations indicate that recycled/millisecond pulsars (MSPs), which do not trace recent star formation, may also efficiently accelerate cosmic-ray electrons. We study the contribution of MSPs to the galactic non-thermal radio emission, finding that they can dominate the emission from massive quiescent galaxies. This model can explain recent LOFAR observations that found a peculiar radio excess in galaxies with high stellar masses and low star-formation rates. We show that MSP-based models provide a significantly improved fit to LOFAR data. We discuss the implications for the radio-FIR correlation, the observation of radio excesses in nearby galaxies, and local electron and positron observations.
