2 Burst results for "Amanda Tar"
"amanda tar" Discussed on Science Magazine Podcast
"Podcast for april knights. Two thousand twenty one. I'm sarah crespi. Each week we feature the most interesting news and research published in science and the sister journals. I up contributing correspondent. Josh socal discusses. What's new with cars. These are incredibly magnetic neutron stars that sometimes shootout insanely fast bursts of gamma rays. Then i talked with researcher kristof zoellick for about the origins of our elaborate brains. When and where did humans get such complex thinking machinery first up this week. We have contributing correspondent josh soco. We're gonna talk about magnitogorsk and some exciting things revealed by observation from a recent flare from an hr. Hi josh okay. Magnetized there these highly neutron. How do they get so magnetic mysterious so neutron stars normally form in a supernova their compressed out of the core of very massive star at some point in that formation specifically the first ten seconds that the magnetized exists it's fluid it's whole mass as molten in somehow in their a dynamo action can start to get going something like the dynamo at the center of the earth that powers earth's magnetic field or the dynamo that powers the sun's field. At least that's the theory and this is swirling charged particles that basically make a bunch of magnetic fields exactly. Can you give us a picture of a magnetized having trouble imagining something. That's very heavy but also small but also really magnetic if you think about ordinary neutron star this basically the last stop on the line that matter can be and not be a black hole is the densest form of matter imaginable. You've taken something about the mass of the sun or a little bit bigger and you compressed it to the size of a city. You have a ten kilometer radius in which you've packed matter at the density of an atomic nucleus or a little bit denser. That is incredibly extreme object already and gravity around that works in weird ways on top of that the compression process concentrates dynamic fields. Amanda tar is all of that and then it's adding fields that are a thousand times stronger than even the normal neutron star medic feels something like a trillion times strength of a refrigerator magnet. and in. so now you're layering on top of gravity effects. These magnetic field effects and atoms are stretched into different oblong shapes in this magnetic field. Photons of light are split under this magnetic field. I will also add that. It gets denser. So it's a solid object. It's very hot and crust is solid. It's like thought to be a crystal lattice. It's like a frozen crystal even though it's still very high and the under parts are thought to be maybe a little bit more fluid although it's very mysterious Matter even takes in the heart of a neutron star magna tars also released these massive gamma ray flares. This process is pretty amazing. Can you describe how researchers think at this point. It works what researchers think is happening. Is that the magnetic field from the star or somehow gripping the crust and stressing straining it until it snaps. And there's a massive star quake kind of like an earthquake and it's that event this huge earthquake on the surface of this insanely magnetized. Heavy object that creates an event. It's visible from galaxies away. We've seen some of these before but something happened in april twenty twenty. That made it so we could get a lot more information than we usually do about one of these. What was different about this particular gamma-ray flare so it's taken decades to see even a few of these events and all the ones that have been discovered before happen either in the milky way galaxy or right outside of it. They were actually so bright that they temporarily sent some spacecraft into safe mode bay swamp detectors flooded gamma-ray instruments so much so that scientists could even study the details of the event. What happened last year. In april on april fifteenth was there was a gamma ray. Burst like this but it was from a magnitude in another galaxy. A nearby galaxy called sculptor and because it was farther away. Scientists could actually see more of the details of what happened because it wasn't so blindingly bright on our detectors a side note. Here you talk about us being flooded with gamma rays. And they're a washing them and they're shooting at us. A are these dangerous for people when a flare from another galaxy impinges on us here on earth so this is kind of an interesting question. No not that dangerous but in two thousand four. That was the closest magnitude giant to earth. And i think it was tens of thousands of light years away and it hit earth on the nightside of earth but atmospheric scientists actually measure that it temporarily turned the ionosphere of earth from night to day. What it was as if the sun was beating down in the atmosphere for a very brief moment. that's how powerful it was. I also talked to a scientist who said that if a magnetized giant flare went off pretty close to earth and nobody knows how often that would be that could cause disruption technology like a solar storm. Are these gamma ray flares that were talking about the only way. Were able to observe magnifies. The only way we're able to see something is a magnet tar. You could also see monetize and other ways their neutron stars that are very active very magnetized. They have x ray bursts and storms of activity that are observed much more often than he's really rare flares. So i think now we know of at least thirty mentors that are in the milky way. The latest flare that we were talking about today. The one from twenty twenty came from the sculptor galaxy. And what it let us do was get different information about a magnetized and this flaring process. What were some of the new things that we learned from this. This burst because it was farther away. It was still very bright but the initial bright spike only milliseconds for this big flash of gamma rays to come through the instruments that reveal a lot about what's actually going on in specifically it showed that whatever is producing the brightness. The luminosity we see in this event is plasma. That's moving near the speed of light. This is going back to when you talk about a star quake and cracking the surface of the magnetized. Plasma comes out at that point. Yeah so there's a lot of bridging here between a theoretical picture of an object. That is so extreme. It's hard to simulate hard to calculate and then what's actually observed in this case we see this flash of gamma rays and the idea is that there's a star quake it rips open some of the surface of this highly. Magnetized hot gravitate supercharged object. Plasma comes out. The magnetic fields are so strong around this object that plasma can only really escape near the poles but when it does escape there's so much energy that it shoots out at nearly the speed of life. Wow now that we have a better understanding you know through observation of what's going on. Are we going to be able to look for more of these. Things is gonna be a new kind of signal that we can look for me. It seems like we've seen the flares before is additional information..
"amanda tar" Discussed on Israel Story
"Hey guys it's me. She on friday morning would they. An passed away a month in a day shy of her one hundred and fourth birthday old was a farmer a social activist businesswoman fashion entrepreneur an peace activist for thirty seven years. She was the wife of moshe dayan until the day she died. She was the matriarch of the clan often referred to as the israeli. Kennedy's her story was in many ways. The story of the state of israel. She belonged to a group of people. Now mostly gone. Who were born into an entirely different reality and who through hard work strong conviction and wholehearted dedication will state into existence in shaped its course she was too many in israeli icon but i was among the lucky ones who was also a friend and five years ago. I traveled with her to malta to visit her. Dear friend. amanda tar heel today in celebration of votes long meaningful and impactful life we replay this story of an improbable friendship between two women who came from the most prominent dynasties in the region families that for decades or more often than not on opposite sides of wars military operations in violence from our twenty sixteen episode besties. Here is our in our.