@astronolia

Astrophysicist, Professor of Physics at the University of Wisconsin, Milwaukee, member of @ehtelescope, 🇺🇸🇧🇷, she/her

liamedeiros.com
Joined April 2022
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  • Following90
  • Followers2K
4Media
A really nice piece by the Milwaukee Journal Sentinel today highlighting some of the work we do at the CGCA. jsonline.com/story/news/2025…

At UWM, scientists find a community of researchers, and a chance to share work with public

At UWM, the Center for Gravitation, Cosmology and Astrophysics is committed to two things: science research and public outreach.

jsonline.com
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Thank you Adam Mann, had a great time chatting with you for this interview!
Science News
@ScienceNews19 Jan 2024
The newest image of M87’s supermassive black hole helps confirm Einstein once again. sciencenews.org/article/supe…

Astronomers have snapped a new photo of the black hole in galaxy M87

The Event Horizon Telescope image shows material around the black hole has moved, but other aspects remain the same, proving Einstein is right again.

sciencenews.org
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“In science, it’s always really important to do the same or similar experiments multiple times." — Hubble Einstein fellow @astronolia A new image confirms that the M87 black hole is the kind predicted by Einstein's general theory of relativity. bit.ly/48BWPG3

Astronomers have snapped a new photo of the black hole in galaxy M87

The Event Horizon Telescope image shows material around the black hole has moved, but other aspects remain the same, proving Einstein is right again.

sciencenews.org
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New image of M87 is out! This is from the 2018 observations and shows that the ring is persistent over time!
Event Horizon 'Scope@ehtelescope18 Jan 2024
The EHT has released new images of the M87* black hole from observations taken in April 2018. The brightness peak of the ring has shifted by about 30Âş compared to 2017, consistent with our theoretical understanding of variability from turbulent material around black holes.
Left: the famous 2017 image of the M87* black hole showing a bright ring with peak brightness in the lower left, surrounding a dark region. Right: the newly released image of M87* using observations taken in 2018 with the first participation of the Greenland Telescope, showing a bright ring with peak brightness in the lower right, surrounding a dark region.

ALT Left: the famous 2017 image of the M87* black hole showing a bright ring with peak brightness in the lower left, surrounding a dark region. Right: the newly released image of M87* using observations taken in 2018 with the first participation of the Greenland Telescope, showing a bright ring with peak brightness in the lower right, surrounding a dark region.

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AAS NOVA highlighted our article on the new M87 image with PRIMO! @TodLauer @feryal_ozel @DimitriosPSALT1
AAS Nova@AASNova18 Dec 2023
Selections from 2023: Sharpening Our Images of a Supermassive Black Hole The first image of a supermassive black hole released in 2019 was far from the last, and new algorithms have brought the data into sharper focus. aasnova.org/2023/12/18/selec…
images of a supermassive black hole using data from the Event Horizon Telescope

ALT images of a supermassive black hole using data from the Event Horizon Telescope

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George Wong and I built a DIY radio telescope in my garage and saw the 21 cm hydrogen line from the galaxy! Lots of work, but a lot of fun. ias.edu/news/advancing-eht-i…

Advancing EHT at IAS

From November 1–3, 2023, the Institute for Advanced Study welcomed astrophysicists from across the world to campus for a workshop focused on improving present understanding of observations from the...

ias.edu
Institute for Advanced Study (IAS)@the_IAS27 Nov 2023
This November, astrophysicists from across the world visited @the_IAS for a workshop focused on improving present understanding of observations from @ehtelescope. The organizers also hosted an observing night, featuring a home-made radio telescope. More: ias.edu/news/advancing-eht-i…

Advancing EHT at IAS

From November 1–3, 2023, the Institute for Advanced Study welcomed astrophysicists from across the world to campus for a workshop focused on improving present understanding of observations from the...

ias.edu
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For those of you at the virtual @APSphysics meeting, I will be giving a talk at around 10:12 am EST in the EHT session (LL03:3). This talk will include an introduction to the PRIMO algorithm and the recent results as well as a summary of testing gravity results.
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My collaborator and co-author of the PRIMO result @TodLauer wrote a nice thread explaining in more detail what PRIMO does.
Tod R. Lauer@TodLauer15 Apr 2023
Wanna build a black hole with PRIMO? Here's a little bit of how we do it (skipping most of the math). This is from a paper that Lia Medeiros FA'ed as the lead for developing it. You will use sets of building blocks. Here's one - look closely. Red is + light, blue - light
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📡🌍📡 After a few days of bad luck with the weather across the globe, we are starting our 2023 EHT campaign observing supermassive black holes tonight! Picture (@gopastro ): the LMT on the Sierra Negra in Mexico is getting ready.
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The resemblance is uncanny
Graham Doskoch@astroHDE13 Apr 2023
A photo of two glazed doughnuts next to each other inside a black Tupperware contained. The one on the left is normal size; the one on the right has been thinned out. They resemble the old and new images of M87*.

ALT A photo of two glazed doughnuts next to each other inside a black Tupperware contained. The one on the left is normal size; the one on the right has been thinned out. They resemble the old and new images of M87*.

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So excited to finally share that our paper presenting a new image of M87 is out! See press release here: ias.edu/news/sharper-look-m8… paper here: iopscience.iop.org/article/1…
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The new image of M87 was generated by PRIMO, our new machine learning algorithm (see PRIMO paper here iopscience.iop.org/article/1…). @TodLauer @feryal_ozel
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The team also included @DimitriosPSALT1, sorry I wasn’t able to find your tag this morning!
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The Event Horizon Telescope collaboration has released a new image of the black hole at the center of the M87 galaxy. phys.org/news/2023-04-sharpe…

Taking a sharper look at the M87 black hole

The iconic image of the supermassive black hole at the center of M87—sometimes referred to as the "fuzzy, orange donut"—has gotten its first official makeover with the help of machine learning. The...

phys.org
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🆕BLACK HOLE GETS NEW LOOK WITH MACHINE LEARNING. A team led by IAS Member Lia Medeiros (@astronolia) has produced a groundbreaking new image of the M87 black hole, achieving, for the first time, the full resolution of the @ehtelescope. Read more: ias.edu/news/sharper-look-m8…
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This video shows an overview of the simulation library I created for the training set youtube.com/watch?v=NwGBwMFV… @the_IAS @NSF @ehtelescope
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The EHT uses an array of telescopes spread around the world, but since we cannot cover the whole world in telescopes, there are gaps in our data. PRIMO uses machine learning trained on a large data set of simulations to fill in the gaps in our data where we don't have telescopes.
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So proud of my student’s first paper which appeared on the arXiv today. Aniket has developed Mahakala, a new radiative ray-tracing algorithm for arbitrary space times. @AniketS29955381 arxiv.org/abs/2304.03804

Mahakala: a Python-based Modular Ray-tracing and Radiative...

We introduce Mahakala, a Python-based, modular, radiative ray-tracing code for curved space-times. We employ Google's JAX framework for accelerated automatic differentiation, which can efficiently...

arxiv.org
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What’s particularly cool about this new code is that it’s written in python so that it’s more user friendly and removes some of the barrier to entry into the field. However, since we use Google’s JAX auto-differentiation framework it can run in parallel on CPUs and GPUs.
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#OnThisDay 4 years ago, we unveiled the very first image of a black hole!
Event Horizon 'Scope@ehtelescope10 Apr 2019
Scientists have obtained the first image of a black hole, using Event Horizon Telescope observations of the center of the galaxy M87. The image shows a bright ring formed as light bends in the intense gravity around a black hole that is 6.5 billion times more massive than the Sun
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