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

Origin of the ring ellipticity in the black hole images of M87*, R. Dahale et al. (w/ H. Olivares); arXiv:2505.10333 [astro-ph.HE].

Publication type
Regular Articles
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First polarization study of the M87 jet and active galactic nuclei at submillimeter wavelengths with ALMA, C. Goddi et al. (w/ H. Olivares); arXiv:2505.10181 [astro-ph.GA]

Publication type
Regular Articles
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Black hole mimickers: from theory to observation, C. Bambi et al. (w/ H. R. Olivares-Sánchez); arXiv:2505.09014 [gr-qc].

Publication type
Proceedings
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Observing boson stars in binary systems: The case of Gaia BH1P. Passos, H. R. Olivares-Sánchez, J. A. Font, A. Onofre; arXiv:2504.09521 [astro-ph.HE].

Publication type
Regular Articles
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Proto-neutron star oscillations including accretion flowsD. Tseneklidou, R. Luna, P. Cerdá-Durán, A. Torres-Forné; arXiv:2503.16317 [astro-ph.HE].

Publication type
Regular Articles
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Latest Astrophysics News & Events

Stability of Boson Stars as Black Hole Mimickers

GGD - Gr@V Seminar
Speaker
Gareth Marks (University of Cambridge, Department of Applied Mathematics and Theoretical Physics)
Event date
Venue
Hybrid: room 11.2.25 and Zoom
Event type

We discuss recent results on using boson stars with a solitonic potential as models of ultracompact objects, which could mimic black holes in such phenomenology as VLBI images and gravitational wave signals.

ROXAS: a spectral code for isolated neutron stars oscillations

GGD - Gr@V Seminar
Speaker
Gaël Servignat (Laboratoire Astroparticule et Cosmologie)
Event date
Venue
Hybrid: room 11.2.21 and Zoom
Event type
Relativistic hydrodynamics has undergone major development over the past three decades, notably through high-resolution shock-capturing schemes enabled by conservative formulations of the relativistic fluid equations.