中国物理B ›› 2024, Vol. 33 ›› Issue (4): 40403-040403.doi: 10.1088/1674-1056/ad225d

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View of thermodynamic phase transition of the charged Gauss—Bonnet AdS black hole via the shadow

Ke-Jian He(何柯腱)1, Sen Guo(郭森)2, Zhi Luo(罗智)1, and Guo-Ping Li(李国平)3,†   

  1. 1 College of Physics, Chongqing University, Chongqing 401331, China;
    2 Guangxi Key Laboratory for Relativistic Astrophysics, School of Physical Science and Technology, Guangxi University, Nanning 530004, China;
    3 School of Physics and Astronomy, China West Normal University, Nanchong 637000, China
  • 收稿日期:2023-11-30 修回日期:2023-12-29 接受日期:2024-01-25 出版日期:2024-03-19 发布日期:2024-03-27
  • 通讯作者: Guo-Ping Li E-mail:gpliphys@yeah.net
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No. 11903025), the starting fund of China West Normal University (Grant No. 18Q062), the Sichuan Youth Science and Technology Innovation Research Team (Grant No. 21CXTD0038), the Chongqing Science and Technology Bureau (Grant No. cstc2022ycjh-bgzxm0161), and the Natural Science Foundation of Sichuan Province (Grant No. 2022NSFSC1833).

View of thermodynamic phase transition of the charged Gauss—Bonnet AdS black hole via the shadow

Ke-Jian He(何柯腱)1, Sen Guo(郭森)2, Zhi Luo(罗智)1, and Guo-Ping Li(李国平)3,†   

  1. 1 College of Physics, Chongqing University, Chongqing 401331, China;
    2 Guangxi Key Laboratory for Relativistic Astrophysics, School of Physical Science and Technology, Guangxi University, Nanning 530004, China;
    3 School of Physics and Astronomy, China West Normal University, Nanchong 637000, China
  • Received:2023-11-30 Revised:2023-12-29 Accepted:2024-01-25 Online:2024-03-19 Published:2024-03-27
  • Contact: Guo-Ping Li E-mail:gpliphys@yeah.net
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No. 11903025), the starting fund of China West Normal University (Grant No. 18Q062), the Sichuan Youth Science and Technology Innovation Research Team (Grant No. 21CXTD0038), the Chongqing Science and Technology Bureau (Grant No. cstc2022ycjh-bgzxm0161), and the Natural Science Foundation of Sichuan Province (Grant No. 2022NSFSC1833).

摘要: We examine thermodynamic phase transition (PT) of the charged Gauss—Bonnet AdS black hole (BH) by utilizing the shadow radius. In this system, we rescale the corresponding Gauss—Bonnet coefficient α by a factor of 1/(D-4), and ensure that α is positive to avoid any singularity problems. The equation derived for the shadow radius indicates that it increases as the event horizon radius increases, making it an independent variable for determining BH temperature. By investigating the PT curve in relation to shadows, we can observe that the shadow radius can be used as an alternative to the event horizon radius in explaining the phenomenon of BH PT. Furthermore, the results indicate that an increase in the parameter α corresponds to a decrease in the temperature of the BH. By utilizing the relationship between the temperature and the shadow radius, it is possible to obtain the thermal profile of the Gauss—Bonnet AdS BH. It is evident that there is an N-type variation in temperature for pressures P<Pc. Additionally, as the parameter α increases, the region covered by shadow expands while the temperature decreases. The utilization of BH shadows as a probe holds immense significance in gaining a deeper understanding of BH thermodynamic behavior.

关键词: Gauss—Bonnet AdS black hole, thermodynamic, shadow

Abstract: We examine thermodynamic phase transition (PT) of the charged Gauss—Bonnet AdS black hole (BH) by utilizing the shadow radius. In this system, we rescale the corresponding Gauss—Bonnet coefficient α by a factor of 1/(D-4), and ensure that α is positive to avoid any singularity problems. The equation derived for the shadow radius indicates that it increases as the event horizon radius increases, making it an independent variable for determining BH temperature. By investigating the PT curve in relation to shadows, we can observe that the shadow radius can be used as an alternative to the event horizon radius in explaining the phenomenon of BH PT. Furthermore, the results indicate that an increase in the parameter α corresponds to a decrease in the temperature of the BH. By utilizing the relationship between the temperature and the shadow radius, it is possible to obtain the thermal profile of the Gauss—Bonnet AdS BH. It is evident that there is an N-type variation in temperature for pressures P<Pc. Additionally, as the parameter α increases, the region covered by shadow expands while the temperature decreases. The utilization of BH shadows as a probe holds immense significance in gaining a deeper understanding of BH thermodynamic behavior.

Key words: Gauss—Bonnet AdS black hole, thermodynamic, shadow

中图分类号:  (Physics of black holes)

  • 04.70.-s
04.70.Dy (Quantum aspects of black holes, evaporation, thermodynamics) 04.50.Kd (Modified theories of gravity)