AI 中文总结
研究利用16年Fermi-LAT观测数据对真正的CSO样本搜索γ射线发射，未发现显著信号，仅在GB6 J0906+4124附近检测到一个信号（TS = 28.7），表明CSO的GeV发射可能不常见或难被Fermi-LAT探测，需多波长后续观测确定信号起源。
AI 中文摘要
作为活动星系核（AGN）的一个特殊子类，致密对称天体（CSO）因其作为年轻AGN的潜在作用而备受关注。费米大面积望远镜（Fermi-LAT）已探测到多个发射γ射线的CSO，这促使人们进一步寻找更多此类天体。我们利用16年的Fermi-LAT观测数据，对一个真正的CSO样本进行了系统的γ射线发射搜索。未发现与任何CSO有明确关联的显著γ射线信号。仅在CSO GB6 J0906+4124附近检测到一个γ射线信号，在0.1-300 GeV波段的TS = 28.7（约4.9σ）。在3 GeV时Fermi-LAT平均点扩展函数的68%包含半径内，GB6 J0906+4124仍是该γ射线信号可能的对应源。这项工作表明CSO的GeV发射可能不常见或低于当前Fermi-LAT的探测灵敏度，需要进一步的多波长后续观测来确定GB6 J0906+4124附近γ射线信号的起源。
英文摘要
As a particular subclass of active galactic nuclei (AGNs), compact symmetric objects (CSOs) have attracted significant attention due to potential role as young AGNs. Several $γ$-ray emitting CSOs have been detected with Fermi Large Area Telescope (Fermi-LAT), which motivates further searches for more $γ$-ray emitting CSOs. We perform a systematic search for $γ$-ray emission from a bona fide CSO sample using 16 yr Fermi-LAT observation data. No significant $γ$-ray signal is found to be firmly associated with any CSO. Only one $γ$-ray signal is detected near CSO GB6 J0906+4124 with TS = 28.7 ($\sim4.9σ$) in 0.1--300 GeV band. Within the 68\% containment radius of Fermi-LAT average PSF at 3 GeV, GB6 J0906+4124 remains the plausible counterpart of the $γ$-ray signal, primarily due to its classification and broad spectral coverage. This work suggests that GeV emission from CSOs may either be uncommon or simply below the current Fermi-LAT detection sensitivity. Further multi-wavelength follow-up is needed to determine the origin of the $γ$-ray signal near GB6 J0906+4124.
Comments11 pages, 2 figures, 3 tables; Accepted for publication in ApJ
