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-linear dynamics of spinning bosonic stars: formation and stability, N. Sanchis-Gual, F. Di Giovanni, M. Zilhão, C. Herdeiro, P. Cerdá-Durán, J. A. Font and E. Radu; arXiv:1907.12565 [gr-qc].

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Spontaneously Scalarized Kerr Black Holes in Extended Scalar-Tensor–Gauss-Bonnet Gravity, P. V. P. Cunha, C. A. R. Herdeiro and E. Radu; Phys. Rev. Lett. 123 (2019) no.1, 011101, arXiv:1904.09997 [gr-qc]. Featured on the cover of Volume 123, Issue 1 of Physical Review Letters (3 July 2019).

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Regular Articles
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Spontaneous scalarisation of charged black holes: coupling dependence and dynamical features, , , , and ; Class. Quant. Grav. 36 (2019) 134002, arXiv:1902.05079 [gr-qc].

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Regular Articles
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Asymptotically flat spinning scalar, Dirac and Proca stars, C. Herdeiro, I. Perapechka, E. Radu and Y. Shnir;  arXiv:1906.05386 [gr-qc].

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Einstein-Maxwell-scalar black holes: classes of solutions, dyons and extremality, D. Astefanesei, C. Herdeiro, A. Pombo and E. Radu; arXiv:1905.08304 [hep-th].

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Regular Articles
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Latest Astrophysics News & Events

Pedro Cunha PhD defense

Pedro Cunha defended his PhD thesis with title "Shadows and gravitational lensing of Black Holes interacting with fundamental fields" on September 9th 2019, at IST-Lisbon. The panel, composed by Prof. Volker Perlick, Frederic Vincent, José Natário, Carlos Herdeiro (advisor) and José Lemos (president) unanimously attributed the highest classification of Approved with Distinction and Honour to an outstanding piece of work. Congratulations Pedro!