Open Access

Fig. 1.

image

Download original image

Left: Schematic representation of a massive star moving on an elliptic orbit around the SMBH. The phase of the star is labelled Φ and its distance from the SMBH is labelled D. The observer (obs) is located at the angle αobs with respect to the plane of the orbit and its phase is Φobs. β is the angle between the direction defined by the SMBH and the star and the direction defined by the SMBH and the observer. Right: The geometry of the interaction between the γ-ray photon (γ) and the soft photon (ε) from the star. L is the propagation distance of the γ ray and α is the incident angle of the colliding photons.

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.