Robert Fisher
@fisherastro
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Caltech-UC Berkeley-LLNL-Univ. of Chicago-UMassD. American&Italian Theoretical and Computational Astrophysicist. Professor. He/him.
UMass Dartmouth
Joined November 2013
There’s a new twist on one of the strangest supernova remnants in the galaxy, known as 3C 397. (1/n)
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Experimenting with the @AnthropicAI Claude Code command line beta. In some ways, it is a natural extension of familiar chat LLM interfaces. In others, it offers a brief glimpse of more agentic AIs to come -- building and running code and analyzing results largely on its own.
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RT @BenShappee: It's rare for a grad student paper to spark a new subfield—but this collab between @UHIfA’s Colby Haggerty and the Shappee….
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Fisher was the last survivor of the Wolf prize winning group (along with Ken Wilson and Leo Kadanoff) who had done fundamental work on the renormalization group. It's a beautiful and insightful lecture (". this is the picture I carry around from Wilson. ").
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.@harvardphysics posted a historically significant video from 2017 of the late great Michael Fisher discussing the origin of the renormalization group.
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Ethan has another great story on the strange supernova remnant SN 1181 (aka Pa 30). It's possible it is the product of an ONe white dwarf (WD) merging with a CO WD. My former PhD student Rahul Kashyap led a pioneering simulation of these for his thesis.
The mystery of the Milky Way’s most bizarre supernova. Back in 1181, a "guest star" appeared in the constellation of Cassiopeia. We're only now figuring out the origin (and remnant) of the Milky Way's most unusual supernova.
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Massachusetts has made a big step towards reducing inequality across the Commonwealth by making college tuition and mandatory fees free for high need students — including nearly a quarter of current @UMassD current students.
umassd.edu
The UMass Dartmouth Deal to provide expanded opportunities for personal and professional success to Massachusetts undergraduate students
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Roulette wheels back then had a small tilt, which produced a non-uniform probability distribution for the ball. The Cabal exploited this small tilt by building custom-made computers into platform shoes. @StartsWithABang tells the story here:
forbes.com
In the 20th century, the ultimate game of chance was transformed into a surefire payout for a crafty few.
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As described in the delightful book “The Eudaemonic Pie” and Gleick’s “Chaos,” .in the 70s, the “Chaos Cabal” at UC Santa Cruz undertook computer simulations similar to these, as well as experiments.
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RT @DanHooperAstro: I'm looking for some great postdocs to come to Madison next year! Neutrino astrophysics! Gamma-ray astronomy! Dark Matt….
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What is physics if not understanding how complex natural systems work? Hopfield’s early papers are immediately intelligible to any physicist, and are deeply rooted in statistical mechanics, owing to his training as a condensed matter physicist.
Seen a lot of takes about the physics Nobel this year, so as someone who's been in AI4Physics research for a while at this point, here is mine: Hopfield Neural Networks at least are very much physics! Thread, generally derived from Amit et al 1987 (.
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I participated in the judging of an elevator pitch competition hosted by our campus’s NSBE chapter. Every one of the participants, deserves the opportunity to go to the national meeting to advance their career aspirations. Can you help make it happen? .
linkedin.com
I just got asked a magical question! Why don't you bring every student from NSBE to the National Convention? I know the answer to this valid question but I would like to give you some context. A few...
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RT @vijay_x_varma: We are looking for PhD students for Gravitational Wave projects, come work with us at @UMassD and U2GRC!.Details at: ht….
web.uri.edu
Multiple funded PhD positions are available at the UMass Dartmouth and University of Rhode Island gravity research group. We seek candidates for multiple, fully-funded PhD positions at UMass...
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RT @kareem_carr: “How do I know if someone understands probability? They understand probability if they know probability is not a product.….
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Such a great discussion between @nicoleyh11 and @stevenstrogatz on how impactful thermodynamics and statistical mechanics remains today. Just in time to share with my stat mech students this semester!.
In the mid-1800s, the engineering marvel of using steam to complete mechanical work gave rise to a new science: thermodynamics. Today, the field is charging into the quantum realm. Listen to this week’s episode of “The Joy of Why” with co-host @stevenstrogatz.
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RT @XRISM_jp: 一年前の#今日 は、XRISMとSLIMの打上げの日でした。. 現在、XRISMは、軌道上で当初の目標を上回る分光性能など、優れた機器性能を達成し、科学観測を行っています。. これからも応援、よろしくお願いいたします。. #JAXA
https://….
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It's a shame that we've enshrined a practice in which all too often people aren't aware of the strength of the community supporting them. When appropriate, I've shared letters with the advisees, as other mentors including Leo Kadanoff once did for me. It can be a world changer.
Anyone else tear up when finishing rec letters for former advisees? Or just me?.
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RT @kjb_astro: . @starstrickenSF got hacked, report the post if you can, Twitter isn't helping her
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