Optical Quasi-Periodic Oscillation of Blazar PKS 1440-389 in the TESS Light Curve-Reference-Cited by-同舟云学术

Optical Quasi-Periodic Oscillation of Blazar PKS 1440-389 in the TESS Light Curve

Published:2024-05-31 Issue:6 Volume:10 Page:242
ISSN:2218-1997
Container-title:Universe
language:en
Short-container-title:Universe

Author:

Lu He¹²³,Yi Tingfeng¹²³^ORCID,Tang Yanke⁴⁵^ORCID,Wang Junjie¹,Zhang Shun¹,Wang Liang¹,Chen Yutong¹,Shen Yuncai¹,Dong Liang³,Zhang Yangwei⁶

Affiliation:

1. Department of Physics, Yunnan Normal University, Kunming 650500, China

2. Guangxi Key Laboratory for the Relativistic Astrophysics, Nanning 530004, China

3. Yunnan Province China-Malaysia HF-VHF Advanced Radio Astronomy Technology International Joint Laboratory, Kunming 650011, China

4. College of Physics and Electronic Information, Dezhou University, Dezhou 253023, China

5. Yunnan Key Laboratory, International Centre of Supernovae, Kunming 650216, China

6. South-Western Institute for Astronomy Research, Yunnan University, Kunming 650500, China

Abstract

We report the results of time series analysis of blazar PKS 1440-389, observed by the Transiting Exoplanet Survey Satellite (TESS) in two sectors. We find that the source has a quasi-periodic oscillation (QPO) of about 3.1 days for sector 11 and around 3.7 days for sector 38 in the optical band. We use two methods to assess the QPO and its confidence level: Lomb–Scargle periodogram and weighted wavelet Z-transforms. We explore various potential explanations for these rapid quasi-periodic variations and propose that their source most likely resides within the innermost region of the accretion disk. Within this framework, we estimate the mass of the central black hole of this blazar. We obtain black hole masses of 6.65 × 108M⊙ (Schwarzschild black hole) and 4.22 × 109M⊙ (maximally rotating Kerr black hole), with a main period of 3.7 days. Finally, we utilize the kink instability model to explain the QPO.

Funder

National Natural Science Foundation of China

International Centre of Supernovae, Yunnan Key Laborator

Yunnan Province China-Malaysia HF-VHF Advanced Radio Astronomy Technology International Joint Laboratory

Publisher

MDPI AG

Link

https://www.mdpi.com/2218-1997/10/6/242/pdf

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