Searching Radio Pulsars for Fourteen Unidentified Very-high-energy Sources 后印本

摘要: We present a search for pulsars associated with 14 unidentified very-high-energy (≥100 GeV) γ-ray sources detected by the High Energy Spectroscopy System (HESS) and the High-Altitude Water Cherenkov Observatory along the Galactic plane. Using the Five-hundred-meter Aperture Spherical radio Telescope (FAST), we observed four TeV targets (HESS J1828−099, 3HWC J0633+191, 3HWC J1743​​​​​​+149, and 3HWC J1847−017) with a sensitivity of S1250 ≃ 15 μJy for a τobs ≈ 720 s at a signal-to-noise ratio S/N = 10. Additionally, we analyzed archived Parkes observations covering 13 TeV targets. No convincing new pulsation was detected in the radio searches, aside from seven known pulsars. A tentative 17 ms signal was found in beam M15 of FAST for 3HWC J1847-017, which also overlaps with the position of 4FGL J1847.2−0141. Furthermore, we derived the 0.3–500 GeV test-statistic maps using data from the Fermi Large Area Telescope. Several GeV counterparts exhibited spectra potentially linked to TeV emission, with 4FGL J1847.2−0141 showing a pulsar-like spectral signature.