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

Einstein-Maxwell-dilaton neutral black holes in strong magnetic fields: topological charge, shadows and lensing, Haroldo C. D. Lima Junior, Jian-Zhi Yang, Luís C. B. Crispino, Pedro V. P. Cunha and Carlos A. R. Herdeiro; Phys. Rev. D 105 (2022) 064070, arXiv:2112.10802 [gr-qc].

Publication type
Regular Articles
Read more

Spinning gauged boson and Dirac stars: a comparative study, Carlos Herdeiro, Ilya Perapechka, Eugen Radu, Yakov Shnir, Phys. Lett. B 824 (2022) 136811, arXiv:2111.14475 [gr-qc].

Publication type
Regular Articles
Read more

All-sky, all-frequency directional search for persistent gravitational-waves from Advanced LIGO's and Advanced Virgo's first three observing runs, LIGO Scientific, VIRGO and KAGRA Collaborations, R. Abbott et al. (includes N. Sanchis-Gual); arXiv:2110.09834 [gr-qc].

Publication type
Regular Articles
Read more

Search for continuous gravitational waves from 20 accreting millisecond X-ray pulsars in O3 LIGO data; LIGO Scientific, VIRGO and KAGRA Collaborations, R. Abbott et al. (includes N. Sanchis-Gual); arXiv:2109.09255 [astro-ph.HE].

Publication type
Regular Articles
Read more

Virial identities in relativistic gravity: 1D effective actions and the role of boundary terms, Carlos A. R. Herdeiro, João M. S. Oliveira, Alexandre M. Pombo, Eugen Radu; Phys. Rev. D 104 (2021) 104051, arXiv:2109.05027 [gr-qc].

Publication type
Regular Articles
Read more

Latest Astrophysics News & Events

Dynamical descalarization with a jump during black hole merger

Seminar_logo_event
Speaker
Daniela Doneva (University of Tübingen)
Event date
Venue
Online (only) - Please, note the unusual time
Event type

The black hole merger in scalar-Gauss-Bonnet gravity can lead to dynamical descalarization this is a spontaneous release of the scalar
hair of the newly formed black hole. Depending on the exact form of the Gauss-Bonnet coupling function, the stable scalarized solutions