OC4 - Observational Gravitational Lensing [Microlensing] |
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Speaker |
Mancini, Luigi |
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Co-autors |
Valerio Bozza |
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Talk Title |
Gravitational lensing of S-star cluster by Sgr A* |
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Abstract |
In this talk we discuss the gravitational lensing phenomenology felt by the S-stars, a star cluster located in center of our Galaxy, due to the massive black hole Sgr A*. Actually, this black hole, acting as a gravitational lens, is able to bend the light emitted by these stars, which are moving within its neighborhood, eventually generating secondary images. By considering a set of 28 stars, whose orbits have been well determined by recent observations, we have calculated all the properties of their secondary images, including time and magnitude of their luminosity peaks and their angular distances from the central black hole. The amplification of the star luminosities by microlensing is examined too. Finally, we explore the possibility to observe this kind of events by GRAVITY, the next-generation VLTI instrument. |
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Talk view |
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