Hossam Khalil
@hossam.bsky.social
Astrophysics PhD student at the University of Helsinki studying galaxy clusters and the local LSS in X-ray and optical λs
Went to a dark-sky location for the Perseids last week. Ended up SATgazing a swarm of stupid starlinks.
August 17, 2025 at 8:12 PM
Went to a dark-sky location for the Perseids last week. Ended up SATgazing a swarm of stupid starlinks.
Was a very nice talk. Love seeing X-ray spectral lines that clear for the first time!
📢 Coming NewAthena Science Webinar
Unveiling Hot Gas Kinematics in Galaxy Clusters with XRISM: Stormy Weather, Multiple Cascades, and Calm Outskirts, by Irina Zhuravleva
🗓️ 27 March 2025 16:30 CET
Abstract + connection details
🔗 www.the-athena-x-ray-observatory.eu/en/blog/newa...
Unveiling Hot Gas Kinematics in Galaxy Clusters with XRISM: Stormy Weather, Multiple Cascades, and Calm Outskirts, by Irina Zhuravleva
🗓️ 27 March 2025 16:30 CET
Abstract + connection details
🔗 www.the-athena-x-ray-observatory.eu/en/blog/newa...
March 27, 2025 at 6:59 PM
Was a very nice talk. Love seeing X-ray spectral lines that clear for the first time!
Reposted by Hossam Khalil
We are experiencing technical problems which are part of some growing pains (more content, more users, same infrastructure). At the moment there are no funding or programmatic threats to ADS. Thank you for your patience while we sort things out.
February 11, 2025 at 2:04 PM
We are experiencing technical problems which are part of some growing pains (more content, more users, same infrastructure). At the moment there are no funding or programmatic threats to ADS. Thank you for your patience while we sort things out.
My first first-author paper is out on the arXiv (arxiv.org/abs/2403.170...! A little over a year's work to release AXES-2MRS, an all-sky X-ray galaxy group catalogue based on extended X-ray sources from ROSAT and optical 2MRS galaxies. A thread🧵🔭.
April 14, 2024 at 9:40 PM
My first first-author paper is out on the arXiv (arxiv.org/abs/2403.170...! A little over a year's work to release AXES-2MRS, an all-sky X-ray galaxy group catalogue based on extended X-ray sources from ROSAT and optical 2MRS galaxies. A thread🧵🔭.
Just attended one of the nicest talks about NICER (Neutron star Composition explorER). Reminds me of the very first research project at ZC. Really nice to catch up with the pulsars.
September 15, 2023 at 1:21 PM
Just attended one of the nicest talks about NICER (Neutron star Composition explorER). Reminds me of the very first research project at ZC. Really nice to catch up with the pulsars.
Everyday I ask myself: why did I take an asteroid course this semester? But the answer remains shrouded in the mist
September 11, 2023 at 10:13 AM
Everyday I ask myself: why did I take an asteroid course this semester? But the answer remains shrouded in the mist
Room temperature (arXiv) found baryons? Let’s see🔭🧪
A new paper looks at the latest Gaia DR3 data and finds something ... unexpected? It seems that the Milky Way has a declining rotation curve.
arxiv.org/abs/2309.00048
arxiv.org/abs/2309.00048
September 4, 2023 at 4:20 PM
Room temperature (arXiv) found baryons? Let’s see🔭🧪
Delayed for the nth time.. Truly cursed
Long thread on the cursed detector:
August 28, 2023 at 12:14 AM
Delayed for the nth time.. Truly cursed
Doing observational work is so satisfying. You don’t have to worry about right answers. You just get THE right answer.
August 25, 2023 at 6:58 PM
Doing observational work is so satisfying. You don’t have to worry about right answers. You just get THE right answer.