Enhanced Doppler Beaming for Dust-enshrouded Objects and Pulsars in the Galactic Center

Stars within the innermost part of nuclear star cluster can reach orbital velocities up to a few percent light speed. As analyzed by Rafikov, Doppler boosting stellar may be relevance at pericenter orbits, especially with upcoming high-precision photometry in near- and mid-infrared bands. Here we analyze previously neglected effect infrared spectral index monitored objects on Doppler-boosted continuum emission narrow photometric band. In contrast main-sequence stars, detected compact infrared-excess dust-enshrouded have an enhanced Doppler-boosting as much order magnitude, variability amplitude 10% for most eccentric orbits. similar way, pulsars dominated nonthermal synchrotron are also expected exhibit stronger signal factor least 4 comparison canonical S stars. case orbit is robustly determined, relative flux variation thus provide hints about nature objects. For extended objects, such G1, that variable due tidal, ellipsoidal, bow-shock, irradiation effects, subtraction variations will help better comprehend their internal physics. addition, higher-order relativistic effects modified different negative indices way it obtain both positive values 1%.