El Gordo (The Fat One) Galaxy Cluster - Deep Sky Videos
Professor Meghan Gray discusses the immense galaxy cluster El Gordo (The Fat One), also known less catchily as ACT-CL J0102-4915.
More links and info in full description ↓↓↓
Professor Gray: www.nottingham...
The Atacama Cosmology Telescope: ACT-CL J0102-4915 "El Gordo," a Massive Merging Cluster at Redshift 0.87 - ui.adsabs.harv...
JWST's PEARLS: A new lens model for ACT-CL J0102−4915, "El Gordo," and the first red supergiant star at cosmological distances discovered by JWST - ui.adsabs.harv...
Weighing "El Gordo" with a precision scale - iopscience.iop...
Head-to-Toe Measurement of El Gordo: Improved Analysis of the Galaxy Cluster ACT-CL J0102-4915 with New Wide-field Hubble Space Telescope Imaging Data - iopscience.iop...
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Video by Brady Haran and James Hennessy
Пікірлер: 38
I'm so thankful you make these videos, as well as the other channels. Thanks to everyone involved!
Great to see another video with Prof Gray I'm glad the importance of uncertainty in the estimates was mentioned!
@jursamaj
10 ай бұрын
I think even more important than the uncertainty is the small sample size. On a sample of *1,* an oddity isn't that surprising.
A very heartwarming story about your friend Felipe, we all have our little academic families to thank
We call our orange cat 'Gordo' because he is a chonk. Now, here we find out he isn't only a chonk, but a galaxy cluster influencing our models of the early Universe. Very good cat! 🐈
@Olhado256
10 ай бұрын
Depending on how big his error bar is, he might be not just a chonk but an absolute unit!
Euclid will give us more info on this. Looking forward to the first science results. Please do more NGC videos Brady.
Always a happy day when a new Professor Gray 60 symbols (edit: deep sky) Vid drops.
@yeet1337
10 ай бұрын
not 60 symbols
@stevepayne3094
10 ай бұрын
@@yeet1337 oops! Thanks for letting me know.
@yeet1337
10 ай бұрын
@@stevepayne3094 :D
Cool video as usual. One very minor point, “flaca” means thin or skinny, not exactly flat, that would be “plano”. ☺️
Congratulations one of the best real informative astronomy channel. Nice audio, perfect explaination without useless emphasis, nice selection of subjects. 👏👏👏👏
Love this channel so much! Thanks!
El gordo, like the spanish Christmas lottery
They missed the opportunity to call it "Teh Heccin' Chonker" instead.
I understand that a Galaxy Cluster are Galaxies gravitational bound together. But Gravitation is everywhere, so, how to discern Galaxies gravitational bound or not? Great Video, thanxalot.
@garethdean6382
10 ай бұрын
The check is whether a galaxy is moving fast enough to not orbit the center of mass. If it's moving too fast it will 'escape' the cluster and so is not bound to it. This is actually a relatively simple measurement to make.
Thank you!
I'm always excited when there is a new Deep Sky Video, I'm only sad they are so infrequent.
My favourite !!!!
What's funny is that this video would've been the same had the point been across the line with most of its error bar below it. It's within error so there'd be no definitive answer.
@judychurley6623
10 ай бұрын
I would think that an error bar is symmetrical around the data point.
@FHBStudio
10 ай бұрын
@@judychurley6623It is, usually (depending on the underlying distribution). Which is why I said/meant that had the actual point been on the other side of the line, the lower end of the error bar would not have been.
Y'all are cool GODZZ
They don't have an Edge, but do they have a Bono?
*The BFC*
The paradigm isn't dead yet. Long live Lambda-CDM.
I'm not fat. Just big boned!
:)
Doctor, help me! Uhn...
😥 she's old now
@NorrisSaiyan
10 ай бұрын
She’s older, yes, but I don’t think all that old, she’s just running with the Gray hair, which is the noble thing to do
@judychurley6623
10 ай бұрын
@@NorrisSaiyan So are we all to exactly the same extent, no error bar needed.
first!
Cling to the model, defend legacy over evidence. It's what Einstein would have wanted. (warning! this textbox contains sarcasm)
@judychurley6623
10 ай бұрын
This study is evidence, with the error bar helping define the range of certainty/uncertainty. That they are looking and measuring to test the model is what is interesting. If the data point fell out of the range, they would have excepted that, and moved on to a new theory.
Meghan is the best! Being a 2D rendering of a 3D field of view herself, she beautifully demonstrated the problem of determining what angles these clusters might be interacting at with those fist bumps!