This theoretical-physics study constructs an exact static, spherical Einstein-equation solution for a black hole embedded in a Hernquist dark-matter halo and derives optical, quasinormal-mode and thermodynamic consequences.
Key findings
- Within the model, the halo decreases photon-sphere radius and apparent shadow size, modifies oscillation frequencies and damping, and enlarges thermodynamically stable regions while introducing phase structures absent from vacuum Schwarzschild spacetime.
Why this matters globally
The work provides theoretical templates for asking whether dark-matter environments could imprint black-hole images or gravitational-wave signals, although separating such effects from spin, plasma and astrophysical uncertainty remains difficult.
Thai researcher contribution
David Senjaya of Mahidol University is the corresponding author, demonstrating Thai-affiliated work in theoretical gravitation and dark matter.
Limitations to consider
The solution is idealised, static and spherical, excluding spin, accretion, plasma, halo dynamics and formation history. Quasinormal-mode links use the eikonal regime, and no EHT or gravitational-wave data are fitted, so observability is not established.