NASA announced the results of Step 1 of the Astrophysics Probe competition. Unfortunately @LEMXray was not selected. We want to thank our amazing Team of 300+ scientists, engineers, and program managers, administrators, who dedicated 2 years to developing the LEM concept! (1/2)

But do not worry, LEM is not going away! The massive progress that the Team made developing the scientific ideas and mission concept will carry on. You will be hearing from us! In the meantime, @LEMXray will be cheering on Team @AXISprobe in Step 2! Go X-rays!! (2/2)

As we scan through the simulated bubble, the line profile on the right varies, revealing its complex velocity structure! A notable ‘double-horn’ feature emerges at the bubble’s center, caused by the opposing expansion of its near and far sides. ⬅️➡️ (2/2)

Need an example of the @LEMXray amazing capabilities? The X-ray tomography of @eROSITA_SRG bubbles! The left map shows an iron (FeXVII) line emission bubble in a #MilkyWay -like galaxy from the TNG50 simulation, resembling observed eROSITA bubbles. (1/2)

Greetings from the eROSITA first results conference, where many amazing results on the #circumgalacticmedium – obtained thanks to @eROSITA_SRG – were presented! Francois Mernier also showed how @LEMXray will push our understanding of this key science to the next level! 🚀

Greetings from the Applied Superconductivity Conference in Salt Lake City, Utah! In his invited talk, Nick Wakeham (NASA GSFC/UMBC) showed how NASA’s #microcalorimeter designs are being optimized to achieve the exquisite measurements of X-ray photon energy needed for @LEMXray. 🔬

This is nicely demonstrated on the supernova remnant Cassiopeia A (based on models coming from state-to-the-art simulations) by S. Orlando et al. in this new @LEMXray White Paper. (6/6) ➡️ https://t.co/0Jl0CGiCUr

With its unprecedented X-ray spectral resolution, this is exactly what @LEMXray will do! Cherry on the cake 🍰: LEM has a large field of view, allowing to capture even the closest #supernova remnants in their entirety! 🔭 (5/6)

X-ray #spectroscopy is the key to solve this question: subtle spectroscopic features allow us to understand how fast the remnants of the explosion travel, what they are made of, and in which physical state they are. (4/6)

We know remnants of supernovae display a lot of asymmetries, with patches of explosion remnants containing more chemical species than others (e.g. oxygen 🌊, iron 🧲, etc.). What we don't know, however, is what #physics govern these explosions and lead to these asymmetries. (3/6)

“We are made of star-stuff”, said once Carl Sagan. This is because the wide majority of our atoms have been forged in the exploding core of dying stars: #supernovae. But how do supernovae explode? (2/6)

Today is #LEMpaper day! 📰 We are are proud to highlight a new White Paper on the @LEMXray observation of the core-collapse supernova remnant Cassiopeia A, by S. Orlando et al. (2024). A thread ⬇️ (1/6)

Read about all these examples and more @LEMXray AGN science in "Active Galaxy Science with the Line Emission Mapper: The Case for High-Resolution Soft X-ray Spectroscopy" by Weaver et al.! 📰 (5/5) ➡️ https://t.co/hoBN2rSCQA

But how do supermassive black holes evolve? 📈 What about #AGN at high redshift? The unmatched spectral resolution of @LEMXray makes them very easy to catch via their Fe-K emission line! (4/5)

But there's more! @LEMXray 's high collecting area allows it to for the first time capture the winds flowing out of supermassive black holes in a matter of hours! 🌬️🌪️ (3/5)

For example, thanks to its cutting-edge spectro-imaging capabilities, @LEMXray will answer questions about the interplay between stellar and black hole feedback and the role in preventing or encouraging the birth of new stars in galaxies. 🌌 (2/5)

Today is #LEMpaper day! #SupermassiveBlackHoles 🕳️ and @LEMXray 🛰️? Yes! LEM is a powerful telescope that will unveil many mysteries about virtually all aspects of Active Galactic Nuclei #AGN, which is outlined in the new white paper by Weaver et al.! A thread ⬇️ (1/5)

Read more about array design in Bandler+2023!

Are those still #July4th fireworks? Or is this @LEMXray microcalorimeter array prototype? 👀🤩🎇 With its 14,000 pixels LEM camera is an amazing detector that provides both images and spectra in each pixel, unveiling many outstanding Universe mysteries!

Today, John ZuHone @astrojaz, a member of @LEMXray scientific leadership, shared results from Zhang+2024 which show how LEM will finally unveil gas motions in the galaxy cluster outskirts that imprint the history of the large scale structure formation!