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

Bondi-like Accretion Flow Dynamics: The Role of Gravitational Potential, R. Ranjbar, H. R. Olivares-Sánchez, S. Abbassi; arXiv:2502.12101 [astro-ph.HE]

Publication type
Regular Articles
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General relativistic quasi-spherical accretion in a dark matter halo, R. Ranjbar, H. R. Olivares-Sánchez; arXiv:2502.12072 [astro-ph.HE]

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Regular Articles
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The persistent shadow of the supermassive black hole of M87 II. Model comparisons and theoretical interpretations, K. Akiyama et al. (w/ H. Olivares); Astron. Astrophys. 693 (2025) A265

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Regular Articles
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A multi-frequency study of sub-parsec jets with the Event Horizon Telescope, J. Röder et al. (w/ H. Olivares); arXiv:2501.05518 [astro-ph.HE]

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Regular Articles
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The putative center in NGC 1052, Anne-Kathrin Baczko et al. (w/ H. Olivares); Astron. Astrophys. 692 (2024) A205arXiv:2501.08685 [astro-ph.HE].

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Regular Articles
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Latest Astrophysics News & Events

An Overview of the magnetized advective flows around black holes

GGD - Gr@V seminar
Speaker
Samik Mitra (Indian Institute of Technology Guwahati)
Event date
Venue
Online only
Event type

One of the most efficient energy sources in the universe is the matter accretion onto compact objects, such as black holes (BHs) and neutron stars (NSs). Since magnetic fields are ubiquitous everywhere, the accretion flow is expected to be magnetized in nature, where the large-scale magnetic fields inside the disks are commonly rooted either from the companion star or the interstellar medium.