Hossam Aly
astrohoss.bsky.social
Hossam Aly
@astrohoss.bsky.social
Astrophysics postdoc, currently at TU Delft🇳🇱. Planet Formation, Accretion Discs (especially misaligned and warped ones), Dust Evolution, Computational Astrophysics. Formerly Leicester🇬🇧, Milan🇮🇹, Lyon🇫🇷, and Heidelberg🇩🇪. Originally from 🇪🇬
Potentially the reason why Peter Mandelson was sacked as UK ambassador to US a few months ago? Apparently he advised Epstein to stay away from ex-prince Andrew, which Epstein appreciated. Both joking/hoping Trump will be in WH, 2 days before the 2016 elections
November 13, 2025 at 2:29 PM
Happy international cat day! Bailey is the neighbour's cat (few houses down the road). He visits a few times a week. Here he's pretending to be a rabbit
August 8, 2025 at 9:43 PM
This is shown very nicely in this particle plot in a cut in the disc for the smallest and largest stokes simulations
9/n
November 13, 2023 at 5:25 AM
Next, we see if this instability also occurs globally. We run 3D global SPH simulations with different Stokes number. WInDI is triggered globally and grows VERY quickly. Here's what it looks like for Stokes=0.1
6/n
November 13, 2023 at 5:24 AM
This is shown nicely in this schematic (based on values from the calculation). Top panel shows the thickness of gas (blue) and dust (red). While the gas thickness oscillates, the dust gets compressed. This effect increases with the stokes number and warp magnitude, Figs 3, 4
5/n
November 13, 2023 at 5:23 AM