Mehdy Lefkir @mlefkir - Bluesky Profile

Latest posts by mlefkir.bsky.social on Bluesky

Looking to start a PhD in Physics & Astronomy in 2026? The team @physicsuol.bsky.social have announced their STFC-funded projects on offer next year, spanning astrophysics, planetary science, and space instrumentation. Deadline: Jan 18th, contact us to learn more!

le.ac.uk/study/resear...

07.11.2025 13:32 — 👍 25 🔁 23 💬 0 📌 4

The variability of active galaxies: I. Broad-band noise X-ray power spectra from XMM-Newton and Swift Accreting supermassive black holes at the centres of galaxies are the engine of active galactic nuclei (AGN). X-ray light curves of unabsorbed AGN show dramatic random variability on timescales rangin...

My second PhD paper has been accepted for publication! arxiv.org/abs/2510.14529

29.10.2025 12:04 — 👍 1 🔁 0 💬 0 📌 0

Interesting & slightly alarming to see these odd artefacts in PCA. Lots of PCA in astronomy too. Maybe important when data have 1/f noise? 🧪🔭 Here’s the preprint version of their paper: www.biorxiv.org/content/10.1...

05.12.2023 23:18 — 👍 9 🔁 5 💬 0 📌 0

And I thought the visa + NHS surcharge for students was expensive !

05.12.2023 00:09 — 👍 1 🔁 0 💬 0 📌 0

@mlefkir is following 20 prominent accounts

Becka Phillipson
@beckastrosaurus

Astro/Physicist @Villanova | Philadelphia, PA | research in nonlinear dynamics, accreting compact objects, and wacky time-varying phenomena any views are my own and not of my employer :) stuff and things

Didier Barret
@didierbarret

X-ray astrophysics at IRAP (Toulouse). X-IFU Principal Investigator.

University of Leicester, Physics & Astronomy
@physicsuol

Astronomer Royal for Scotland | Catherine Heymans
@astroroyalscot

Astronomer Royal for Scotland, Professor of Astrophysics, Edinburgh University. Director of the German Centre for Cosmological Lensing, RUB. #LongCovid (She/her)

Dr. Michele L. Silverstein (she/her/hers)
@silverstronomy

Astronomer. Low-mass stars, exoplanets, and observational astronomy. Studying magnetic activity in fully convective M dwarfs using radio data.

NSF–DOE Rubin Observatory
@vrubinobs

Get ready for a new era in astronomy and astrophysics with Rubin Observatory! Para español siga a Instagram: http://instagram.com/rubin_observatory

Phil Uttley
@philuttley

Astrophysicist. Timer of black holes. Brit in NL. Proto-Butlerian.

Johannes Buchner
@johannesbuchner

I study the physics of how gas flows from dark matter halos onto the black hole event horizon. I build data science tools to look closer at how black holes become supermassive.

Athena X-ray observatory
@the-athena-x-ray-observatory.eu

Athena Community Office official account. The largest X-ray observatory ever built, Athena will investigate some of the hottest and most energetic phenomena in the Universe with spatially-resolved X-ray spectroscopy & deep wide-field X-ray spectra imaging

Moritz Fischer
@moritzfischer.world

Astrophysicist • Dark Matter moritzfischer.world darkium.org

Prof. Stefano Bianchi
@astrobianchi

Astrofisico - Professore presso l'Università degli Studi Roma Tre https://sites.google.com/inaf.it/stefanobianchi "Cosa fa un astrofisico? Ripara le stelle..."

Simin Tong
@simintong

PhD student @UoLeicester| Protoplanetary Disk & Planet Formation | A beginner theorist but always an observer of everyday life. Personal Website: https://simintong.github.io/home

Dr. Bert Vander Meulen
@vandermeulenastro

✨ ESA Research Fellow (European Space Agency) ✨ Studies X-ray obscuration and reflection in Active Galactic Nuclei (AGNs). Author of the 3D X-ray radiative transfer code SKIRT (https://ui.adsabs.harvard.edu/abs/2023A%26A...674A.123V).

Frédéric Paletou
@fredpaletou

Astronomer ✨ K-index ~ 0.4 🤔 SPL ✈️ and 🥋 still on the 道... Born at ~320 ppm CO₂ https://orcid.org/0000-0003-1970-2929 more @ https://sites.google.com/site/fpaletou/Home otherwise see ya' @ 42°55'00.6"N 0°17'58.7"W @FredericPaletou@mastodon.social

Seti Astrophel
@seti-astro

I'm a PhD student studying the spiral in the Milky Way 🌌 I also make space YouTube Videos and articles!

SF2A
@sf2a

Compte officiel de la Société Française d'Astronomie et d'Astrophysique

William Thompson
@wrtastro

Herzberg Instrument Science Fellow at the National Research Council in Victoria, Canada. Imaging exoplanets and writing #JuliaLang tools.

Royal Astronomical Society
@royalastrosoc

www.ras.ac.uk

Astro-Obs Newcastle 🔭
@astro-obs-ncl

The Astro-Obs group, researching observational astrophysics and cosmology at the School of Mathematics, Statistics and Physics at Newcastle University. 🌌 🔭📡

Adi Foord, PhD
@adifoord

/uh ˈdee/ Assistant Prof. of Physics @ UMBC | searching for supermassive black holes | www.adifoord.com