Discover and read the best of Twitter Threads about #Darkmatter
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Daily Bookmarks to GAVNet 04/06/2022 greeneracresvaluenetwork.wordpress.com/2022/04/06/dai…
The Genesis of Kerr Solution. A Complete Description of Spinning… | by Areeba Merriam | Apr, 2022
cantorsparadise.com/the-genesis-of…
#GeneralRelativity, #history, #JohnKerr, #RotatingBlackHoles
cantorsparadise.com/the-genesis-of…
#GeneralRelativity, #history, #JohnKerr, #RotatingBlackHoles
A new experiment could confirm information as the fifth state of matter
interestingengineering.com/information-fi…
#ElementaryParticles, #InformationStorage, #DarkMatter, #InformationMass, #ResearchResults
interestingengineering.com/information-fi…
#ElementaryParticles, #InformationStorage, #DarkMatter, #InformationMass, #ResearchResults
Every time I talk about #DarkMatter or #DarkEnergy several people jump in to say “ehhh sounds like a fudge factor/epicycles/aether!” And I get why — we’re talking about stuff we can’t directly see, it’s weird! — but, very sincerely, we did consider that. xkcd.com/1758/
There is a very small, very vocal group of astrophysicists who constantly work on alternative models in an attempt to do away with dark matter and/or dark energy. They write a lot of papers & get a LOT of press. But, they have yet to produce a model that compels the rest of us.
It’s not that we wouldn’t LOVE to have some explanation of these phenomena that does not include a component of the universe that refuses to interact with our detectors. We like catching stuff in detectors! We like being able to see stuff! But sometimes the cosmos doesn’t care.
Dark matter is out there
Find it is all we care
WIMPs, axions, dark photons...
We are looking for the latter bosons
Kinetic mixing allows the dark
to become Standard and make a “spark”!
A multilayer dielectric haloscope as detector
equipped with a SPAD as light collector.
1/
Find it is all we care
WIMPs, axions, dark photons...
We are looking for the latter bosons
Kinetic mixing allows the dark
to become Standard and make a “spark”!
A multilayer dielectric haloscope as detector
equipped with a SPAD as light collector.
1/
A stack of dielectric layers, in total 46,
enables the dark to standard photon mix
Converted a photon?
The aspherical lens to focus it
The spad to then count the hit
As no significant excess we get
90% C.L. upper limits we set
2/
enables the dark to standard photon mix
Converted a photon?
The aspherical lens to focus it
The spad to then count the hit
As no significant excess we get
90% C.L. upper limits we set
2/
The name of the detector is MuDHÍ مضيء
And it’s the first dark matter experiment in the UAE
Although DM we haven’t found yet
A few goals we have already met
On our paper such achievements, we outline
though not yet peer-reviewed, you can read it on arXiv!
3/
And it’s the first dark matter experiment in the UAE
Although DM we haven’t found yet
A few goals we have already met
On our paper such achievements, we outline
though not yet peer-reviewed, you can read it on arXiv!
3/
Nonton lagi film #TheLakeHouse". Tadinya kukira ini ttg kisah cinta dlm relativitas umum (dilatasi waktu). Tp ini lebih ke kisah cinta antara 2 semesta paralel kuantum yg saling bertabrakan. 2 waktu yg berselisih itu konsekuensi dr semesta yg menggelombang
Dalam relativitas unum, waktu melengkung bersama ruang akibat kuatnya gravitasi. Ini tergambar dalam film #Interstellar.
Saking kuatnya gravitasi black hole, di film tsb tergambar bahwa waktu bukan cuma melambat tp bahkan mundur shg masa lalu si tokoh terlihat dalam dimensi ruangwaktu baru dalam struktur yg bernama tesseract
aei.mpg.de/GQFI
aei.mpg.de/GQFI
The ATLAS Collaboration at @CERN is celebrating the results of 1,000 papers studying LHC collisions.
From the discovery of the Higgs boson to searches for new physics, these results give unprecedented insight into our Universe. Let's explore! THREAD⤵️ atlas.cern/updates/news/1…
From the discovery of the Higgs boson to searches for new physics, these results give unprecedented insight into our Universe. Let's explore! THREAD⤵️ atlas.cern/updates/news/1…
In 2010, just 3 weeks into the first heavy-ion run, ATLAS saw an unexpectedly large imbalance of energy in pairs of particle jets created in lead-nuclei collisions. 🎇
This was the first observation of the "jet quenching" phenomenon at the LHC! cerncourier.com/a/atlas-observ…
This was the first observation of the "jet quenching" phenomenon at the LHC! cerncourier.com/a/atlas-observ…
Shortly afterwards, ATLAS scientists made the first measurement of top-quark pair production at the LHC.
This incredibly accurate result required just a few months worth of LHC data, demonstrating the extraordinary potential of the accelerator!
This incredibly accurate result required just a few months worth of LHC data, demonstrating the extraordinary potential of the accelerator!
Fritz Zwicky is often credited for coining the term 'dark matter' but that's not quite true: the term had been in use for *decades* when he published his famous 1933 paper, and he was well aware of that. A #Thread on the early history of #darkmatter
A few months before publishing the 1933 paper, in an article on cosmic rays, Zwicky wrote in passing "according to the present estimates, the average density of dark matter in our galaxy and throughout the rest of the universe are in the ratio 100000"😯journals.aps.org/pr/pdf/10.1103…
This may sound puzzling/shocking, especially since the ratio matches modern estimates! Clearly by early 1933 he was familiar with the concept of 'dark matter', and estimates existed of both the local density, and of the average density of the universe! How can that be?
🔭✨🌀 Záhada galaxie BEZ TEMNÉ HMOTY vyřešena, odsává ji galaxie jiná...
Víc tuna ► vedator.org/apogalaxie nebo v #thread níže.
#veda #science #věda #galaxy #darkmatter #astrophysics #astrofyzika #fyzika #physics #wow #wonder #nature #universe #apocalypse #astronomy #space
Víc tuna ► vedator.org/apogalaxie nebo v #thread níže.
#veda #science #věda #galaxy #darkmatter #astrophysics #astrofyzika #fyzika #physics #wow #wonder #nature #universe #apocalypse #astronomy #space
Titěrná galaxie NGC 1052-DF4 udělala nedávno v kosmologii nemalé vlny. Její pozorování naznačilo, že má kolem sebe šokantně málo temné hmoty. Nynější studie naznačuje řešení záhady – temná hmota kolem NGC 1052-DF4 skutečně chybí, ale jenom protože ji UKRADLY GALAXIE OKOLNÍ. 💥
To zjistilo pozorování týmu MIREI MONTES učiněná s pomocí Hubblea. DF4 se totiž nachází blízko masivnější galaxie NGC1035. Právě tenhle větší budulínek z menší galaxie ZŘEJMĚ ODSÁVÁ viditelnou (baryonovou) hmotu i „neviditelnou“ temnou (nebaryonovou) hmotu. 🌬
Daily Bookmarks to GAVNet 10/20/2020 greeneracresvaluenetwork.wordpress.com/2020/10/20/dai…
The collective psychology of coronavirus | openDemocracy
opendemocracy.net/en/transformat…
#psychology #collective
opendemocracy.net/en/transformat…
#psychology #collective
Opinion | Herd Immunity? Or ‘Mass Murder’? - The New York Times
nytimes.com/2020/10/19/opi…
#HerdImmunity
nytimes.com/2020/10/19/opi…
#HerdImmunity
Daily Bookmarks to GAVNet 10/11/2020 greeneracresvaluenetwork.wordpress.com/2020/10/11/dai…
The Cure for Aging Might be the Cure for Alzheimer’s - Andreessen Horowitz
a16z.com/2020/10/07/agi…
#alzheimer #cure #aging
a16z.com/2020/10/07/agi…
#alzheimer #cure #aging
Did indigenous Americans and Vikings trade in the year 1000? | Aeon Essays
aeon.co/essays/did-ind…
#americans #vikings #trade
aeon.co/essays/did-ind…
#americans #vikings #trade
Daily Bookmarks to GAVNet 09/07/2020 greeneracresvaluenetwork.wordpress.com/2020/09/07/dai…
Connecting Croatia on a bridge built by China – POLITICO
politico.eu/interactive/co…
#bridge #china #croatia
politico.eu/interactive/co…
#bridge #china #croatia
Dark Matter Experiment Finds Unexplained Signal | Quanta Magazine
quantamagazine.org/dark-matter-ex…
#signal #DarkMatter
quantamagazine.org/dark-matter-ex…
#signal #DarkMatter
Over the next week, we're going to be looking back at the most cited #MNRAS papers of the decade 🏆 Together they've been cited nearly 10,000 times!
🔟 The 10th most cited #MNRAS paper of the decade was: Too big to fail? The puzzling darkness of massive Milky Way subhaloes by Michael Boylan-Kolchin @MBKplus et al
doi.org/10.1111/j.1745…
#astronomy #MilkyWay
doi.org/10.1111/j.1745…
#astronomy #MilkyWay
@MBKplus @RoyalAstroSoc @OxfordJournals 9⃣ The 9th most cited #MNRAS paper of the decade was: E pur si muove: Galilean-invariant cosmological hydrodynamical simulations on a moving mesh by Volker Springel of the Max Planck Institute for Astrophysics doi.org/10.1111/j.1365… #cosmology
Thank you for having me today at the @HouseScience subcommittee on Energy to share my pride in the people and programs of @ENERGY's Office of Science -Dr. Chris Fall
science.house.gov/hearings/the-d…
science.house.gov/hearings/the-d…
@HouseScience @ENERGY I came to @ENERGY at a special time of opportunity. We're supporting tens of thousands of researchers, including students, at US universities & national labs. At the same time, we’re building & maintaining some of the most amazing scientific instruments & facilities in the world
We've broken ground on @DUNEscience, the biggest physics experiment on US soil news.fnal.gov/2019/11/prep-w…
#DYK American astronomer #VeraRubin was met by skeptics in the 1970s when she proposed evidence for dark matter. She studied galactic rotation curves.
✨#DarkMatterDay
✨#DarkMatterDay
According to Newton's laws, when objects rotate around a common centre, the ones furthest from the centre move more slowly than those near it. Otherwise, the furthest objects would fly off into space.
✨✨#DarkMatterDay
✨✨#DarkMatterDay
Rubin's observations of stars in galaxies didn't match this. Either there is mass that we can't see or gravity behaves differently than we presently know. #DarkMatter is now widely accepted in the scientific community thanks to the work of Vera Rubin.
✨✨✨#DarkMatterDay
✨✨✨#DarkMatterDay
An incredible 85% of the matter in the #Universe is still “dark” to our eyes. We know it must be there, but don’t know what it is. #DarkMatter thread to follow soon... get ready😎
#PhysicsDoodle
#PhysicsDoodle
The first hints for #DarkMatter existence can be traced back in the '30s (#Oort in '32 and #Zwicky in '33), but the problem was not given much attention until the '70s. BUT, what was "the problem"? 1/
(In the picture is the Swiss astronomer Zwicky)
(In the picture is the Swiss astronomer Zwicky)
In a nutshell "the problem" was that:
1) if you believed in Newton's laws about gravity
2) and you trusted your data
--> there had to be some "hidden", "dark matter" to explain the data. 2/
1) if you believed in Newton's laws about gravity
2) and you trusted your data
--> there had to be some "hidden", "dark matter" to explain the data. 2/
@godless_mom Heaven is just a fairy story for those afraid of the LIGHT
#TheoreticalPhysicists prefer to believe in the heavenly fairy tales they can concoct themselves.
#cosmology #Heaven #GOD #Truth #StephenHawking #NeildeGrasseTyson
#TheoreticalPhysicists prefer to believe in the heavenly fairy tales they can concoct themselves.
#cosmology #Heaven #GOD #Truth #StephenHawking #NeildeGrasseTyson
@godless_mom Don’t know if they buried #StephenHawking in a black hole, like most people, but he said: "If you feel you are in a black hole, don’t give up. There’s a way out."
theguardian.com/science/2015/a… #Hawking #BlackHoles #MythMath #cosmology #NeildeGrasseTyson #atheist
theguardian.com/science/2015/a… #Hawking #BlackHoles #MythMath #cosmology #NeildeGrasseTyson #atheist
@godless_mom Imagine there’s no #BlackHole heaven.
#StephenHawking didn't know what to believe about the NOTHING of #BlackHoles.
nature.com/news/stephen-h… #atheists #cosmology
#StephenHawking didn't know what to believe about the NOTHING of #BlackHoles.
nature.com/news/stephen-h… #atheists #cosmology
(1/3) I'm excited about a new paper that I've written with Carlos Blanco (@CBlanco2718), Sten Delos and Adrienne Erickcek:
"Annihilation Signatures of Hidden Sector Dark Matter Within Early-FormingMicrohalos".
#DarkMatter
arxiv.org/pdf/1906.00010…
"Annihilation Signatures of Hidden Sector Dark Matter Within Early-FormingMicrohalos".
#DarkMatter
arxiv.org/pdf/1906.00010…
(2/3) In hidden sector dark matter models, there can be an era in the early universe that was dominated by matter (instead of radiation, as usual). During this era, density perturbations grow quickly, leading to the formation of a HUGE population of sub-Earth mass microhalos.
(3/3) These microhalos lead to novel signatures that we can look for with gamma-ray telescopes, and provides us with a powerful way to test this interesting and exciting class of dark matter models.
#DarkMatter Virtual Season 4 - Episode 4.03 - Act 1
Previously on Dark Matter: The crew teams with Anders and the G.A. to seal the rift, the black ships' power source. THREE and SIX return. Wexler stays. Ryo uses transfer transit to reboot himself as FOUR. #DarkMatter 1/11
Previously on Dark Matter: The crew teams with Anders and the G.A. to seal the rift, the black ships' power source. THREE and SIX return. Wexler stays. Ryo uses transfer transit to reboot himself as FOUR. #DarkMatter 1/11
A Reynaud Industries press conference. CEO Alicia Reynaud's brilliant young daughter, Carina, is delivering a speech about her mother's company when - smoke bombs go off. Chaos! Her bodyguards hustle her through the back and down a corridor where - #DarkMatter 2/11
They are jumped by two masked men. Carina breaks free, turning a corner and coming face to face with - FIVE who informs her that she is her sister. There's no time to explain. Suddenly, O.S. shots ring out! FIVE gives her the Raza's transmission codes. #DarkMatter 3/11
(1/5) I'm excited about a new paper that I've written with @GordanKrnjaic and Sam McDermott. It combines some of my favorite things: black holes, dark matter, and the Hubble tension.
arxiv.org/abs/1905.01301
#blackholes #cosmology #darkmatter #Hubble
arxiv.org/abs/1905.01301
#blackholes #cosmology #darkmatter #Hubble
(2/5) If even a small number of black holes were created around the time of inflation, their relative abundance would grow as the universe expands, making it quite plausible that the energy density of the early universe was once dominated by black holes.
(3/5) If these black holes were small, they would quickly Hawking evaporate. Unlike most other particle production mechanisms, this generates all kinds of particles, no matter how feebly interacting -- a promising way to generate dark matter and dark radiation.
A New Age of Warfare: How Internet Mercenaries Do Battle for Authoritarian Governments nytimes.com/2019/03/21/us/…
NSO Group, Mr. al-Qahtani spoke of grand plans to use its surveillance tools throughout the Middle East and Europe, like Turkey and Qatar or France and Britain.
nytimes.com/2019/03/21/us/…
nytimes.com/2019/03/21/us/…
Today even the smallest countries can buy digital espionage services, enabling them to conduct sophisticated operations like electronic eavesdropping or influence campaigns that were once the preserve of major powers like the United States and Russia.
nytimes.com/2019/03/21/us/…
nytimes.com/2019/03/21/us/…
Okay UK government I’m with you on this one.
In case you’re wondering, it looks like the image is a modified snapshot from a simulation of how galaxies form in clusters and tendrils of #DarkMatter in the Cosmic Web. More on how these simulations work: icc.dur.ac.uk/Eagle/
In case you’re wondering, it looks like the image is a modified snapshot from a simulation of how galaxies form in clusters and tendrils of #DarkMatter in the Cosmic Web. More on how these simulations work: icc.dur.ac.uk/Eagle/
How cosmic simulations are done:
1) Write code to simulate mass & gravity for little bits of dark matter
2) Set up their distribution based on tiny fluctuations we see in THE LITERAL AFTERGLOW OF THE BIG BANG
3) Let code run for a while & it looks like what we see in the sky 🌌
1) Write code to simulate mass & gravity for little bits of dark matter
2) Set up their distribution based on tiny fluctuations we see in THE LITERAL AFTERGLOW OF THE BIG BANG
3) Let code run for a while & it looks like what we see in the sky 🌌
To emphasize how cool this is: we are starting with tiny tiny variations in microwave light that comes to us from when the cosmos was still basically ON FIRE from the Big Bang and we use some math and out comes THE DISTRIBUTION OF ACTUAL GALAXIES IN SPACE 🤯
Here we go, time for my first thread about a new paper, out today on your local arXiv server! #sciencetwitter #physics #hepph #darkmatter #cosmology #earlyuniverse #plasma arxiv.org/pdf/1902.08623…
1/ Backstory: we've been looking for dark matter for a long, long time and we haven't found it. We're pretty sure it's a particle based on the concordance of evidence from a wide variety of astrophysical environments, but we're not sure what kind of particle it is.
2/ Since we've been looking pretty hard in a couple of particle mass ranges (most notably we've been looking for dark matter particles that are heavier than a proton) and since we haven't found it, folks are starting to wonder if other dark matter masses are possible/interesting
So.. In 2018 at Budapest Airport, it is apparently okay to provide a #dysfunctional service where your customers get #overcharged, while not replying to their complaints. For a year. Am I right, @WizzAir? Cc: @budairport #YearLongComplaint * thread *
My brother lives some countries and an ocean away, so we bought #WizzAirCoupons for our mother as a present. She wanted to visit him, but the site failed to give her the discount. The coupon can no longer be used, so she wrote you an email. This was on the 1st of November, 2017.
She got the first - and to this day, the only - reply at the end of that same month. My mother asked a few questions to which no answer was ever received. #TerriblePenPal
#DarkMatter Virtual Season 4 - Episode 4.02, Act V
Our story so far: josephmallozzi.wordpress.com/2018/06/24/jun…
VFX - SPACE
The G.A. shuttle streaks towards the rift, evading weapons fire from the alien ships. As it draws near -
Another ship exits the rift. It's the Marauder!
Our story so far: josephmallozzi.wordpress.com/2018/06/24/jun…
VFX - SPACE
The G.A. shuttle streaks towards the rift, evading weapons fire from the alien ships. As it draws near -
Another ship exits the rift. It's the Marauder!
Onboard The Raza, Android detects the Marauder. SIX's voice comes over the comm channel, requesting permission to dock. As a jubilant FIVE responds, Android directs The Raza on an intercept course, providing cover fire for the Marauder as -
The G.A. shuttle is struck and begins to lose structural integrity. It drifts towards the event horizon and - detonates in a blinding flash, taking down out the rift and a handful of alien ships.
