Saved in:
| Main Authors: | , , , , , , , , |
|---|---|
| Format: | Preprint |
| Published: |
2025
|
| Subjects: | |
| Online Access: | https://arxiv.org/abs/2503.13210 |
| Tags: |
Add Tag
No Tags, Be the first to tag this record!
|
| _version_ | 1866915458804875264 |
|---|---|
| author | Zhang, S. B. Hobbs, G. Johnston, S. Dai, S. Li, Y. Wang, J. S. Yang, X. Wu, X. F. Staveley-Smith, L. |
| author_facet | Zhang, S. B. Hobbs, G. Johnston, S. Dai, S. Li, Y. Wang, J. S. Yang, X. Wu, X. F. Staveley-Smith, L. |
| contents | Fast radio bursts (FRBs) are energetic, short-duration radio pulses of unclear origin. To explore effective survey strategies for detecting FRBs from nearby globular clusters (GCs), we investigate the burst energy distribution, which has a strong influence on the detection rate. We re-analyze FRBs and pulsars exhibiting broad energy distributions by fitting their high-energy tails with power-law models. Two cosmological repeating FRBs (FRB 20201124A and FRB 20220912A), one nearby FRB (FRB 20200120E), and two pulsars (RRATs J1846$-$0257 and J1854+0306), exhibit power-law indices of $α\gtrsim -1$, suggesting that their bright pulses contribute significantly to the total radio pulse energy. The brightest bursts from these sources can be fitted with a power-law model ($α_{\rm Bri} = -0.26 \pm 0.05$), suggesting that an extremely flat index is required to naturally derive high-luminosity FRBs from low-luminosity sources. We present detailed survey strategies for FAST, MeerKAT and Parkes cryoPAF in the search for FRBs in nearby GCs using different power-law indices, recommending targets for observation. We suggest that combining observations with FAST ($\sim3$ hours) and Parkes cryoPAF (10$-$20 hours) is practicable for discovering new FRBs in nearby GCs. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2503_13210 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Flat tails in FRB and pulsar energy distributions: implications for optimizing nearby FRB surveys Zhang, S. B. Hobbs, G. Johnston, S. Dai, S. Li, Y. Wang, J. S. Yang, X. Wu, X. F. Staveley-Smith, L. High Energy Astrophysical Phenomena Fast radio bursts (FRBs) are energetic, short-duration radio pulses of unclear origin. To explore effective survey strategies for detecting FRBs from nearby globular clusters (GCs), we investigate the burst energy distribution, which has a strong influence on the detection rate. We re-analyze FRBs and pulsars exhibiting broad energy distributions by fitting their high-energy tails with power-law models. Two cosmological repeating FRBs (FRB 20201124A and FRB 20220912A), one nearby FRB (FRB 20200120E), and two pulsars (RRATs J1846$-$0257 and J1854+0306), exhibit power-law indices of $α\gtrsim -1$, suggesting that their bright pulses contribute significantly to the total radio pulse energy. The brightest bursts from these sources can be fitted with a power-law model ($α_{\rm Bri} = -0.26 \pm 0.05$), suggesting that an extremely flat index is required to naturally derive high-luminosity FRBs from low-luminosity sources. We present detailed survey strategies for FAST, MeerKAT and Parkes cryoPAF in the search for FRBs in nearby GCs using different power-law indices, recommending targets for observation. We suggest that combining observations with FAST ($\sim3$ hours) and Parkes cryoPAF (10$-$20 hours) is practicable for discovering new FRBs in nearby GCs. |
| title | Flat tails in FRB and pulsar energy distributions: implications for optimizing nearby FRB surveys |
| topic | High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2503.13210 |