Astrophysics

Astrophysics is an area concerning various physical ranging from planetary sized systems, to galactic scale systems and beyond, that intersects various disciplines such as Newtonian dynamics, relativistic physics and particle physics processes.

For our latest developments/activities in this area, please see the listing below at the end of this article.

Exoplanets

An exoplanet is a planet outside the Solar System. In the Milky Way galaxy, it is expected that there are many billions of planets (at least one planet, on average, orbiting around each star, resulting in 100–400 billion exoplanets), with many more free-floating planetary-mass bodies orbiting the galaxy directly.

We study the long-term dynamics of known multi-planet systems. This allow us to test the accuracy of the orbital parameters' determinations, as well as to understand how these systems evolved. We also look for the stable zones in the gaps between already-known planets in order to determine where is it possible to locate Earth-like planets.

See here a movie made by the PhD Animation on "Exoplanets Explained", for a review on the main observational methods used to detect exoplanets.


Latest Astrophysics Publications

Black hole lasers powered by axion superradiant instabilities, João G. Rosa, Thomas K. Kephart; arXiv:1709.06581 [gr-qc].

Publication type
Regular Articles
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Lensing and dynamics of ultra-compact bosonic stars, Pedro V. P. Cunha, José A. Font, Carlos Herdeiro, Nicolas Sanchis-Gual, Miguel Zilhão; arXiv:1709.06118 [gr-qc].

Publication type
Regular Articles
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Light ring stability in ultra-compact objects, Pedro V. P. Cunha, Emanuele Berti, Carlos A. R. Herdeiro, e-Print: arXiv:1708.04211 [gr-qc].

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Regular Articles
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Synchronous frequencies of extremal Kerr black holes: resonances, scattering and stability, Maurício Richartz, Carlos A. R. Herdeiro, Emanuele Berti, e-Print: arXiv:1706.01112 [gr-qc].

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Regular Articles
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Iron Kalpha line of Kerr black holes with Proca hair, Menglei Zhou, Cosimo Bambi, Carlos A. R. Herdeiro, Eugen Radu, Phys. Rev. D95 (2017) 104035e-Print: arXiv: 1703.06836 [gr-qc].

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Regular Articles
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Latest Astrophysics News & Events

From Planet-X to Planet Nine

N/A
Speaker
Nuno Peixinho (Coimbra U.)
Event date
Venue
GAP room
Event type

Abstract: At the end of the 19th century the existence os a planet beyond Neptune was in debate. In 1930, Pluto was discovered, but too far from the prediction. In 1992 we found out that Pluto is actually a member of a huge belt of icy bodies orbiting beyond Neptune.