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Peer-reviewedCC BY 4.0Monthly Notices of the Royal Astronomical Society

A candidate ∼270-d γ-ray periodic modulation in the FSRQ 4FGL J0038.2−2459

  • Jin Min1
  • Fengrong Zhu1,2
  • Peng Zong3
  • Bingkai Zhang3
  1. 1School of Physical Science and Technology, Southwest Jiaotong University , Chengdu, Sichuan Province, 611756 ,
  2. 2The Key Laboratory of Cosmic Rays (Xizang University) , Ministry of Education, Lhasa 850000 ,
  3. 3Laboratory of Particle Astrophysics, Fuyang Normal University , Fuyang 236037 ,
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Abstract

Long-term variability and possible quasi-periodic oscillations (QPOs) in blazars provide a potential probe of the physical processes governing relativistic jets and their central engines. We investigated the γ-ray variability of 4FGL J0038.2−2459 using Fermi−LAT observations from 2008 August 5 to 2025 November 20. We applied the Lomb–Scargle periodogram, phase dispersion minimization, and weighted wavelet Z-transform to the 3-day binned light curve. The analyses identify a possible modulation with a characteristic period of 269.8 ± 5.8 days. The feature is associated with the MJD 57700–59800 active interval, which spans approximately eight cycles. Calibration of the LSP matched-profile statistic against 105 first-order autoregressive [AR(1)] red-noise simulations gives the possible oscillation a local significance of 3.43 σ within the selected active interval. We further explored a supermassive black hole binary (SMBHB)-driven jet-precession scenario as one possible interpretation. Under the adopted model assumptions, the observed modulation corresponds to an intrinsic jet-precession period of ∼9.9 yr and implies a binary orbital period of ∼96 days.

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Cite

BibTeXRIS
BibTeX
@article{min2026candidate,
  title = {{A candidate ∼270-d γ-ray periodic modulation in the FSRQ 4FGL J0038.2−2459}},
  author = {Jin Min and Fengrong Zhu and Peng Zong and Bingkai Zhang},
  journal = {Monthly Notices of the Royal Astronomical Society},
  year = {2026},
  month = oct,
  doi = {10.1093/mnras/stag2029},
  url = {https://academic.oup.com/mnras/advance-article/doi/10.1093/mnras/stag2029/9003261},
  note = {CC BY 4.0},
}
RIS
TY  - JOUR
TI  - A candidate ∼270-d γ-ray periodic modulation in the FSRQ 4FGL J0038.2−2459
AU  - Jin Min
AU  - Fengrong Zhu
AU  - Peng Zong
AU  - Bingkai Zhang
PY  - 2026
DA  - 2026/10/27
JO  - Monthly Notices of the Royal Astronomical Society
DO  - 10.1093/mnras/stag2029
UR  - https://academic.oup.com/mnras/advance-article/doi/10.1093/mnras/stag2029/9003261
AB  - Long-term variability and possible quasi-periodic oscillations (QPOs) in blazars provide a potential probe of the physical processes governing relativistic jets and their central engines. We investigated the γ-ray variability of 4FGL J0038.2−2459 using Fermi−LAT observations from 2008 August 5 to 2025 November 20. We applied the Lomb–Scargle periodogram, phase dispersion minimization, and weighted wavelet Z-transform to the 3-day binned light curve. The analyses identify a possible modulation with a characteristic period of 269.8 ± 5.8 days. The feature is associated with the MJD 57700–59800 active interval, which spans approximately eight cycles. Calibration of the LSP matched-profile statistic against 105 first-order autoregressive [AR(1)] red-noise simulations gives the possible oscillation a local significance of 3.43 σ within the selected active interval. We further explored a supermassive black hole binary (SMBHB)-driven jet-precession scenario as one possible interpretation. Under the adopted model assumptions, the observed modulation corresponds to an intrinsic jet-precession period of ∼9.9 yr and implies a binary orbital period of ∼96 days.
SN  - 0035-8711
SN  - 1365-2966
ER  -