Cristian Joana @cjphy

Physicist, cosmologist at ITP-CAS / ICTP-AP 🇨🇳 ———————————————-—————— Ashamed that is happening again. Free Palestine 🇵🇸🕊️ cjoana.github.io 北京 Joined August 2014

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History of the day @hist_of_the_day

4 weeks ago

#OnThisDay August 8, 1902, Paul Dirac was born — one of the greatest theoretical physicists of the 20th century. He predicted the existence of antimatter and reshaped quantum theory with a blend of logic and beauty that stunned the scientific world. A thread 🧵

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Cristian Joana @cjphy

a month ago

🇵🇸🇺🇳 Petition to CERN for Gaza: More than 1000 physicists (academics) have signed this petition to CERN, in solidarity with Palestine. More than 700 signees are CERN affiliated. cryptpad.fr/form/#/2/form/…

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Cristian Joana @cjphy

2 months ago

Very exciting! I heard rumours about a future ICTP branch in South-Asia, (ICTP-SA). The potential candidate location would be in Thailand, with links to Chulalalong University and regional institutes. Sounds fantastic!!!

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Cristian Joana @cjphy

2 months ago

We need more of this. 👍

Simon Harris TD @SimonHarrisTD

2 months ago

We need more of this. 👍

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Cristian Joana @cjphy

4 months ago

👍

CERNpress @CERNpress

4 months ago

👍

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Scientists for Palestine @Sci4Pal

9 months ago

We just launched the fundraising campaign for our ambitious 2025 plans! Please share and retweet in case you support our goals for 2025: a summer school, an international meeting, a scholasticide archive and an EU lawsuit! gofundme.com/f/support-pale…

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Cristian Joana @cjphy

10 months ago

After a great PBH workshop in Nagoya and the Cosmo24 in Kyoto, is time to go back and finish some work. Meet very interesting people and had great food. It’s always great visiting Japan！

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Miguel Zumalacarregui @miguelzuma

12 months ago

I am thrilled to announce the release of the GLoW (Gravitational Lensing of Waves) code, designed to generate lensed graviatational wave signals. Work led by H. Villarrubia Rojo (@mpi_grav, @Fisicas_UCM) arxiv.org/abs/2409.04606 some highlights in 🧵

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Cristian Joana @cjphy

a year ago

@WKCosmo Yep, it’s just dynamics. SuperHubble distances are receding from us at superluminal velocities, due to the expansion. A wave (peak n’ trough) at superHubble distances are only receding from us, so redshifting. Unless they propagate at faster than light what I very much doubt :)

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Vivian Poulin @VivPoulin

a year ago

3 years ago, we wrote the H0 olympics, where models were ranked for their ability to alleviate the ``H0 tension''. Yet, it was not always clear why some models did better than others. Today's paper clarify this and explains why I think we should stop calling it "the H0 tension".