One of the most exhausting things about being a (perceived) woman working in computational physics is dealing with men who don't think women can do physics and men who don't think women can code (there is a lot of overlap here). Things men have tried to 'explain' to me recently:
- Basic coding practices
- A topic I have published papers on
- How to debug a code ("have you tried adding print statements")
- How code releases work
- My own ideas 😫
#WomenInSTEM #WomenWhoCode

"Welcome to our conference on making science more sustainable. This year the event will be held in-person only, with no hybrid or remote participation options available." 🤡 🤡
#SustainabilityFail

If you want to spend some quality time with #Euclid data, you can use "ESA Sky", which allows everyone to browse public data, pan, zoom, and look around. All in full colour galore, and full resolution:

Euclid Deep Field South: https://sky.esa.int/esasky/?hide_welcome=true&hide_banner_info=true&hips=DES-DR2+ColorIRG&sci=false&layout=esasky&euclid_image=EDFS

Euclid Deep Field North: https://sky.esa.int/esasky/?hide_welcome=true&hide_banner_info=true&hips=PanSTARRS+DR1+color+(i%2C+r%2C+g)&sci=false&layout=esasky&euclid_image=EDFN

Euclid Deep Field Fornax: https://sky.esa.int/esasky/?target=53%20-28&hips=Q1-EDFF-R4-PNG-RGB&fov=14.999999999999998&projection=TAN&cooframe=J2000&sci=false&lang=en&layout=esasky&euclid_image=EDFF

#astronomy #space #ESA

It's #Euclid data release day!

#ESA and the Euclid Consortium are making 63 deg² of Wide Survey data available to the world. Imaging and spectroscopy data, catalogues and masks for 20+ million galaxies, quasars, stars and substellar objects.

This "Q1" data release is aimed both at the community to sharpen their tools for the 30x larger DR1 expected in late 2026, as well as to enable a first set of science projects across cosmic time.

Q1 is accompanied by the presentation of 7 Euclid Consortium data release publications, and an initial batch of 27 science papers.

Read more in the Consortium press release: https://www.euclid-ec.org/public/press-releases/euclid-quick-data-release-1/

And the ESA release webstory: https://www.esa.int/Science_Exploration/Space_Science/Euclid/Euclid_opens_data_treasure_trove_offers_glimpse_of_deep_fields

#astronomy #science #space

Cosmology Results from DESI

Do the latest observations cast doubt on the standard model? I'd say no. We're seeing an evolutionary change from "We have no idea what the dark energy is but we think it might be a cosmological constant" to "We still have no idea what the dark energy is but we think it might not be a cosmological constant".

http://telescoper.blog/2025/03/20/cosmology-results-from-desi/

Can we take a moment to appreciate the people who remember to close issues they opened on code forums/issue trackers and, very importantly, report back about how they solved the problem. You're the heroes we need. 💻 #coding

Exciting! Our paper [https://arxiv.org/abs/2404.01876] on getting the nucleation rate for strong phase transitions from simulations has been accepted (with several improvements and fixes thanks to the referees and others): https://journals.aps.org/prd/accepted/fb077QeaFd1Ecd15e19a34d6b0afe890a9352f5a1

Congratulations to my collaborators, doctoral researcher Anna Kormu and Dorothy Hodgkin Fellow Oliver Gould in Nottingham. 🎉

Basically we found that analytical methods (meaning in practice perturbation theory techniques) are still not great at predicting the nucleation rate, even in a regime where they should be pretty accurate. Which is a bit weird, and also important for things like baryogenesis and gravitational wave signatures.

If I ever have the time and energy I’ll do a longer post about it 😅

#physics #cosmology

Writing grant applications makes me very motivated about my research while also making me want to quit academia 😅 I would also like to have a friendly chat with whoever decided to set a grant deadline on the 8th of January 😒😭
#AcademicChatter #GrantWriting

There won't be a #CupOfCosmology stream this weekend, I'll be busy with my two adopted cats that are arriving at my place in a couple of hours 😁😻

@p16r Just realised I never replied to this 😅
Don't worry if that talk on YouTube felt more complicated than my streams, it was part of a conference about Dark Matter, so it was aimed at people working in the same specialised field.
You don't need matter/antimatter asymmetry to produce PBHs, they can form from the overdense regions in the very early universe (caused by quantum wiggles that are stretched during inflation).
I like the idea of a primordial Kugelblitz, but then what would form the kugelblitz? 🤔

@p16r Thanks for checking in! There's been a variety of things keeping me away from Cup of Cosmology the last couple of weeks, including being at a craft fair one weekend and a minor health thing this last Sunday, but nothing serious 😄 I should be back online this coming Sunday, hope to see you there!

@p16r Thanks for checking in! There's been a variety of things keeping me away from Cup of Cosmology the last couple of weeks, including being at a craft fair one weekend and a minor health thing this last Sunday, but nothing serious 😄 I should be back online this coming Sunday, hope to see you there!

@Rhodium103 Bielefeld University improved in the THE ranking by more than 120 places, because one scientist was co-author on the Global Burden of Disease study
https://blogs.lse.ac.uk/impactofsocialsciences/2021/03/22/the-absurdity-of-university-rankings/

How do scientists color the Universe?

#AskEthan

When you see those gorgeous false-color (or assigned-color) images of the Universe from Hubble, JWST, Chandra and more, what do those colors actually mean?

The answer depends on what you want to show!

https://bigthink.com/starts-with-a-bang/how-scientists-color-universe/

@p16r Yes, that's the paper I mentioned! Our main focus was the potential dark matter coming from PBH (and I think in the talk I only focus on that), and not so much the possible matter-antimatter asymmetry. But the latter is covered briefly in Sec. 7. Main takeaway is Figure 4: the tiny green triangle shows the parameter combination that can produce the right amount of asymmetry while also producing the right amount of DM - it's a very small region! Of course, if you relax the DM requirement and only care about the asymmetry, you can do a lot more.
So short answer to your question yesterday: you can get matter-antimatter asymmetry from PBH evaporation, but with some limitations and caveats. Great question, as always! 😄

Early career researchers in computational early universe physics, come and work in Helsinki! 💕

This year we are hiring up to four postdoctoral researchers! We have a friendly, supportive group and we do some cool early universe physics with computers.

Our advert is here:
https://academicjobsonline.org/ajo/jobs/29096

I'm happy to answer any questions! And please do reach out to past and current group members to ask about their experiences working here, their views matter far more than mine.

For what it's worth, I arrived here after my doctorate 13 years ago and except for two excursions (to Stavanger and Nottingham) never really left. It's very nice here.

#physics #hiring #cosmology #UniHelsinki

Anyway, if you want to see the latest #CupOfCosmology that upset Men™️ , you can catch the replay here: https://www.youtube.com/live/WNbCHPZs6Uk

On the latest episode of #CupOfCosmology, I had a guy tell me I was talking nonsense, throw a string of abusive messages at me because I ignored his shouts to debate him, and tell me ChatGPT is better at debating than me. And today I have a guy trying to explain the scientific method to me (incorrectly) in the comment sections of the stream because he doesn't like that I said "science is not about absolute truths".
Being a femme-presenting science communicator is exhausting. 😩
#scicomm

Today on #CupOfCosmology I'll talk about one of the most hotly-debated topics in cosmology: the Hubble Tension - how fast is the universe expanding and why is it so hard to answer this question?
Live at 7pm CEST / 1 pm EDT. Come and ask all your questions! https://www.youtube.com/live/5L7cqnoHbXI
#scicomm #outreach #cosmology

Happy birthday to #GW170817 our first binary neutron star detection, and the first #GravitationalWave with electromagnetic counterparts!

The gamma-ray burst following the merger was spotted by the Fermi and Integral telescopes and later many other telescopes

https://www.ligo.org/science/Publication-GW170817BNS/index.php

#Astrodon