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

Non-perturbative spinning black holes in dynamical Chern-Simons gravity, Terence Delsate, Carlos Herdeiro, Eugen Radu; Phys. Lett. B 787 (2018) 8-15, arXiv:1806.06700 [gr-qc].

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Regular Articles
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Spontaneous scalarisation of charged black holes, Carlos A. R. Herdeiro, Eugen Radu, Nicholas Sanchis-Gual, José A. Font; Phys. Rev. Lett. 121 (2018) 101102, arXiv:1806.05190 [gr-qc].

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Regular Articles
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Black holes, gravitational waves and fundamental physics: a roadmap, L. Barack et al.,; arXiv:1806.05195 [gr-qc].

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Regular Articles
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Shadows of Exact binary black holes, Pedro V. P. Cunha, Carlos A. R. Herdeiro, Maria J. Rodriguez; Phys. Rev. D 98 (2018) 044053; arXiv:1805.02798 [gr-qc].

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Regular Articles
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Spinning boson stars and hairy black holes with non-minimal coupling, Carlos A. R. Herdeiro, Eugen Radu; International Journal of Modern Physics D 27 (2018) 1843009, arXiv:1803.08149 [gr-qc].

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Regular Articles
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Latest Astrophysics News & Events

Visit to University of Concepcion in Chile

Gr@v member Tjarda Boekholt recently travelled to the University of Concepcion in Chile. He was invited by the Theory and Starformation Group (TSG), which is led by a team of professors including Mike Fellhauer, Dominik Schleicher, Amelia Stutz and Stefano Bovino. In the first week Tjarda lectured students on the Astrophysical Multi-purpose Software Environment (AMUSE). In particular, they discussed the coupling between N-body and hydrodynamics.

Tjarda Boekholt wins CIDMA Young Doctor Award

The CIDMA Young Doctor Award is a prize for a researcher within 5 years after the PhD, who has made important contributions to his or her research field. The 2018 award is granted to Gr@v member Tjarda Boekholt for his recent achievements in the field of dynamical chaos in astronomical systems. During the annual meeting of CIDMA 2018, Tjarda presented his new numerical N-body code and the ability to obtain reversible solutions to highly chaotic systems.

Radio jet studies in Superluminous Supernovae and Cataclysmic Variables

Speaker
Deanne Coppejans
Event date
Venue
Room 32.3.30 CICFANO
Event type

Recent advances in radio telescopes in sensitivity, response time, and wavelength coverage have opened a wealth of new research opportunities. This is particularly the case for transients, where high sensitivity and rapid response is crucial. I will describe how radio observations of two classes of objects are helping to further our understanding of jet physics.