https://doi.org/10.1140/epjc/s10052-025-14911-6
Regular Article - Theoretical Physics
Observational properties of a Schwarzschild black hole surrounded by a Dehnen-type dark matter halo
1
Yunnan Observatories, Chinese Academy of Sciences, 650216, Kunming, People’s Republic of China
2
Key Laboratory for Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, 650216, Kunming, People’s Republic of China
3
International Centre of Supernovae, Yunnan Key Laboratory, 650216, Kunming, People’s Republic of China
4
College of Physics, Guizhou University, 550025, Guiyang, China
Received:
15
September
2025
Accepted:
5
October
2025
Published online:
19
October
2025
This study investigates the accretion process and observational signatures of thin accretion disks around a Schwarzschild black hole (BH) embedded in a Dehnen-type dark matter (DM) halo. We examine the influence of the density 
and radius 
of the DM halo on key disk properties, including the energy flux, temperature distribution, and emission spectrum. Our results show that all three of these quantities decrease with increasing or 
Furthermore, by generating and analyzing both direct and secondary images of the accretion disk, we explore how the observational inclination angle and the DM halo parameters and affect image profiles. Finally, the observed flux distributions are presented for different inclination angles. Our findings indicate that the accretion disk becomes colder and dimmer as the DM halo parameters increase, highlighting the significant role of DM in shaping BH observables.
© The Author(s) 2025
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Funded by SCOAP3.
