Measuring black hole mass through variable line profiles from accretion disks

摘要: THE emission lines in the optical spectra of several active galactic nuclei (AGNs) show a broad double-horned profile which is likely to be produced by matter orbiting central massive black hole disk-like geometry1–3. The unresolved and, sometimes, and redshifted Fe K α observed X-ray Seyfert galaxies4–6 bright binaries7–10 might also dominated Doppler, transverse gravitational shifts keplerian disk tens hundreds Schwarzschild radii (rs = 2GM/c2) around collapsed object11,12. Line from these disks most driven photoionization or Compton heating radiation closer object; flux variations this will cause changes line emissivity. Here we present detailed calculations response relativistic regions. Two characteristic features form on opposite sides line, which, owing light travel-time effects, gradually drift wings, corresponding innermost regions, blue red horns. Observations line-profile could provide first direct measurement mass AGNs2,12,13.