The explosive origin of the Crab Nebula.
https://www.youtube.com/watch?v=08eKnR7CfYI
12/x
#Science #Space #Supernova #Nebula #Explosion #NeutronStar #Radiation #Magnetism #Stars #Star
Le 17 août 2017 occupe une place spéciale dans la mémoire des astrophysiciens. En cette journée, les caractéristiques d'un événement d'ondes gravitationnelles (GW170817) suggèrent la première détection d'une fusion d'étoiles à neutrons. Un branle-bas de combat digne des meilleurs films d'action allait ensuite animer 70 équipes d'astrophysiciens pendant deux mois!
The product of a compact star merger is usually hypothesized to be a hyperaccreting black hole, typically resulting in a gamma-ray burst (GRB) with a duration shorter than 2~s. However, recent observations of GRB~211211A and GRB~230307A, both arising from compact star mergers, challenge this model due to their minute-long durations. The data from both events are consistent with having a nascent, rapidly spinning highly magnetized neutron star (a millisecond magnetar) as the merger product and GRB engine, but a smoking gun signature is still missing. Here we report strong but not yet conclusive evidence for the detection of a 909-Hz gamma-ray periodic signal during a brief time window of GRB~230307A, which is consistent with the rotation frequency of such a millisecond magnetar. Notably, the periodic signal appeared for only 160~ms at an epoch coinciding with the transition epoch when the jet emission from the GRB central engine ceased and when the delayed emission from high latitudes started. If this signal is real, the temporal and spectral features of this gamma-ray periodicity can be consistently interpreted as asymmetric mini-jet emission from a dissipating Poynting-flux-dominated jet, as revealed by the energy-dependent light curve data of this burst.
XRISM Observes Surprising Differences in Cosmic Winds Between Neutron Stars and Black Holes
The X-Ray Imaging and Spectroscopy Mission (XRISM) has made a groundbreaking discovery that challenges our understanding of cosmic winds. While studying the neutron star GX13+1, XRISM found that the wind produced by the neutron star's accretion disc was significantly different from those emitted by ... [More info]
✨ Neutron stars are tiny in size yet colossal in mass.
💥 Born from supernovae, they pack more than the Sun’s mass into a sphere only miles across.
🥄 A single teaspoon of their matter would weigh billions of tonnes, more than an entire mountain range.
🔭 From pulsars to the Crab Nebula, explore the densest matter in the universe.
📝 Explore more: https://TPC8.short.gy/wOp6zU4f
Journey into the cosmos.
#Astronomy #Astrophysics #NeutronStar #Pulsar #CrabNebula #ScienceCommunication #Space #TPC8
PHYS 1311 - Elements of Astronomy - Lecture Day 8
#TachyonBeam #astronomy #NeutronStar #pulsar #Calvera
An article published in the journal "Astronomy & Astrophysics" describes a candidate supernova remnant that was associated with the pulsar nicknamed Calvera. A team of researchers led by Emanuele Greco conducted observations and analyses of a decidedly unusual pair, as finding it approximately 6,500 light-years above the Milky Way's galactic plane was surprising.
An Impossible Thought Experiment:
"Design a spaceship that carries Humans to a Neutron Star. Land on its surface safely. Drill through it to reach its core and come back safely to Earth. This is a reply to those people who literally say "Nothing is Impossible". Even a Type-VII Alien Civilization can never do it".
#Mastodon #science #knowledge #physics #cosmos #space #astronomy #scicomm #writing #NeutronStar #star #thoughtExperiment #imagination #opinion #quote #insights #fediverse #astronomy
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