In these last few years many fields in astrophysics have been advancing at an amazing rate. One of the fastest has been the study of the so-called “fast radio bursts” (or FRBs). As the name implies, FRBs are flashes of radio emission that happen extremely fast – down to a few milliseconds. This short duration […]
The best plot in astrophysics Read More »
X-ray binaries with a Galactic black hole (BHXRBs) have recently been detected in GeV and TeV γ-rays. The radiative mechanism responsible for this emission is not yet fully understood and both leptonic and hadronic processes seem viable. In the former scenario, electrons are accelerated to high energies and dominate the non-thermal spectrum with synchrotron and
Hadronic emission from the jets of X-ray binaries? Read More »
Twisted jets? Warped disks? It’s all possible in black holes! Hi all! Today I will talk a bit about our recent paper on the different types of disks you can have around black holes. As perhaps you would know, in 2019, the Event Horizon Telescope collaboration (EHTC) released the first-ever photos of the inner regions
Warps and twists around black holes Read More »
Making an assumption is inevitable and reasonable in many research projects since it is practically impossible to handle all physics we know in a single study; even if it is feasible, it would rather squander resources, which are given to us. However, it is always required to evaluate carefully whether the assumptions are applicable for
What cooling can do for Sagittarius A* Read More »
The powerful jets launched by a supermassive black hole feeding on material at the centre of a galaxy, comprise some of the most powerful and highly energetic sources of sustained energy in the known Universe. Launched with velocities close to the speed of light, jets transport large amounts of energy from the central regions of
War of the Clouds: Relativistic jet-cloud interactions Read More »
This is going to be a hard post for me to write, and for everyone to read. It will not discuss science, because today I want to talk about something that I think is far more important.TW: sexual assault discussion below. My main hobby is PC gaming, and many of my favorite games (Starcraft 1
Things need to change Read More »
Can you smell this? It’s the fragrance of gunpowder! Let us then investigate the “smoking gun”! Oh, I love this expression! But why do we relate the expression, “smoking gun”, to astrophysical neutrinos? The answer is simple. We cannot observe particles being accelerated to high energies in situ. To be more precise, we cannot observe
The Cubic Kilometer Neutrino Telescope or KM3NeT Read More »
Fast radio bursts are enigmatic transient sources that attracted many studies in the past 13 years. They are radio bursts that release a huge amount of energy within milliseconds time. For many years, they were only observed from very distant galaxies. Given the large distances, those extragalactic fast radio bursts remain mysterious events (find here
An extraordinary burst overshone the radio sky Read More »
In today’s post, I will talk about a subset of compact objects (neutron stars or stellar mass black holes), which run with very high spatial velocity through the interstellar medium. Those runners, in general, imprint characteristic signatures on their way: trails and bubbles. For the case of static objects (i.e., no proper motion), which the
Something slightly different today. Recently I posted about some work I was involved with where we discovered a candidate X-ray binary in the galaxy M83. However, that work came out of a much larger project completely unrelated to X-ray binaries. For the past few years, I have been working with a number of collaborators all
A sensitive new radio catalogue for M83 Read More »
