Hossam Khalil

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!

accurate

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.

Here you can see AXES-2MRS groups (red ovals) overlaid with 2MRS individual galaxies (grey dots) and the local voids in our northern backyard. Refer to the paper for the southern hemisphere and many other interesting plots and results!

In Fig. 2, we show how AXES-2MRS traces the typical “honeycomb” structure of the local large-scale structure through X-ray detections!

AXES-2MRS allowed us to study the local dynamics (z < 0.065) of the Universe: we formed a smaller XMM-Newton subsample, for which we measured and constructed the scaling relations between different X-ray and optical observables, and tested the self-similar expectation.

Firstly, I must thank my supervisor Alexis Finoguenov for his unreserved support throughout this project. AXES-2MRS enhances the completeness of the galaxy cluster literature by adding many low-z low-luminosity low-mass systems that were previously missed.

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🧵🔭.

It’s always relieving seeing such scuffed acronyms in top projects. I’m trying so hard to come up with one for a catalogue for my thesis work. Phew.

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

Yeah I think academic success statistically scales with the telescope diameter in the profile😂
Cool photo!

Nice note!
I’m wondering how this new mass estimation would fit, on a larger scale, in the Local Group total mass estimate which is well-constrained by different methods.

Room temperature (arXiv) found baryons? Let’s see🔭🧪

Delayed for the nth time.. Truly cursed

Subfield feeds would be awesome!

Doing observational work is so satisfying. You don’t have to worry about right answers. You just get THE right answer.