In 1933, Walter Baade and Fritz Zwicky described a neutron star and how it forms. #Poetry #Science #History #Astrophysics #NeutronStar #Baade #Zwicky (https://sharpgiving.com/thebookofscience/items/p1933c.html)
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Black Hole Consumes Magnetized Neutron Star
"The spiraling shape will make you go insane
Everyone wants to see that groovy thing..." (#TMBG)
youtube.com- YouTubeEnjoy the videos and music you love, upload original content, and share it all with friends, family, and the world on YouTube.
Happy belated birthday, GW230529!
Two years and a few days ago, the @LIGO Livingston gravitational-wave detector observed a remarkable gravitational-wave signal.
https://www.aei.mpg.de/1138125/mysterious-object-in-the-gap
Detected soon after the beginning of the fourth joint observing run of the LIGO-Virgo-KAGRA collaborations, the signal came from the merger of a compact object with 1.3 to 2.1 times the mass of our Sun with another compact object with 2.6 to 4.7 times the solar mass.
Astronomers believe that the lighter object is a neutron star and the heavier is a lightweight black hole.
How that lightweight black hole formed is unknown. Its masse falls into the “lower mass gap” between the heaviest neutron stars and the lightest black holes.
https://iopscience.iop.org/article/10.3847/2041-8213/ad5beb
Image: I. Markin (@unipotsdam), T. Dietrich (@unipotsdam and @mpi_grav) H. Pfeiffer, A. Buonanno (@mpi_grav)
Breakthrough in simulating how neutron stars collide 
Longest self-consistent numerical-relativity simulation to date reveals details of black hole and jet formation and advances multi-messenger astronomy.
https://www.aei.mpg.de/1249127/breakthrough-in-simulating-how-neutron-stars-collide
https://journals.aps.org/prl/abstract/10.1103/PhysRevLett.134.211407
Picture: K. Hayashi / @mpi_grav
https://www.europesays.com/uk/97572/ Objects in Our Universe Evaporate Faster than Thought, Scientists Say #HawkingRadiation #NeutronStar #Physics #Science #Star #UK #UnitedKingdom #Universe #WhiteDwarf
Today’s bite-sized space fact:
Neutron stars — the ultra-dense remnants of massive stars — can spin up to 700 times per second. That’s faster than a kitchen blender! 
Mind = Blown.
New header picture 
It shows the two supernova remnants Cassiopeia A (left, in X-rays) and Vela Jr. (right, at radio wavelengths). Both harbor a “central compact object”, a neutron star left behind together with the debris cloud after the supernova.
Researchers from the permanent independent @maxplanckgesellschaft research group “Continuous Gravitational Waves” at @mpi_grav in Hanover, Germany, have been searching for gravitational waves from these central compact objects using the volunteer distributed computing project @einsteinathome.
https://arxiv.org/abs/2503.09731
The fact that they did not find any gravitational waves indicates that the neutron stars can only be minimally deformed.
https://www.aei.mpg.de/1188233/digging-deeper-with-einstein-home?c=26149
Images: http://snrcat.physics.umanitoba.ca/SNRrecord.php?id=G111.7m02.1 and http://snrcat.physics.umanitoba.ca/SNRrecord.php?id=G266.2m01.2
Neutron stars: cosmic powerhouses!
Denser than imaginable, their gravity and magnetism redefine extremes. From billion-tonne teaspoons to pulsars, dive into their wonders. 
Watch the full video here: 
https://TPC8.short.gy/RMGSrs04
On this day 16 years ago, our distributed computing project @einsteinathome began searching for radio pulsars for the first time.
Previously, volunteers were able to donate computing time on their computers to search for gravitational waves from rotating neutron stars (still mysterious remnants of exploded stars).
Starting 24 March 2009, new applications were available that allowed Einstein@Home volunteers to search Arecibo radio telescope data for radio pulsars (special neutron stars) in close binary systems.
On this day seven years ago, an international research team (led by @mpi_grav and @MPIfR_Bonn) published the first millisecond pulsar flashing only in gamma rays.
The discovery was possible thanks to the volunteer distributed computing project @einsteinathome, which the researchers used to find many more gamma-ray pulsars.
Millisecond pulsars are neutron stars – remnants of stellar explosions about 20 km in size with strong magnetic fields – that spin many hundreds of times per second around their axis.
Prior to this discovery, all millisecond pulsars observed in gamma rays also emitted radio waves. The newly discovered “PSR J1744-7619” (rotating 213 times per second) is the first known exception.
https://www.science.org/doi/10.1126/sciadv.aao7228 [Open Access]
ѦਹѤʞ X-rays from Dark Matter?
https://scitechdaily.com/physicists-may-have-found-dark-matter-x-rays-surrounding-magnificent-7-may-be-traces-of-theorized-particle/
#XMMNewton
#ChandraX
#XRay #XRays
#astronomy #DarkMatter
#axion #axions #WIMP
#particle #physics
#astrophysics #cosmology
#NeutronStar #NeutronStars
Phys.org: Did astronomers just witness the formation of a 'strange star?'
#PhysOrg #Quarks #NeutronStar #StrangeStar
https://phys.org/news/2025-02-astronomers-witness-formation-strange-star.html
Phys.org · Did astronomers just witness the formation of a 'strange star?'
Continued thread
The #ChandrasekharLimit is the maximum mass of a white dwarf star, approximately 1.4 times the mass of the Sun.
Beyond this limit, the star's core can no longer support itself against gravitational collapse, leading to the formation of a #NeutronStar or #BlackHole.
Exciting new gravitational-wave candidate!
Last night, the two @LIGO detectors observed the signal candidate S250206dm. It comes either from the merger of a neutron star with a black hole or from the merger of two neutron stars – either way, it's exciting!
The (luminosity) distance is about 1.1 billion light-years and the position in the sky could be constrained to an area of about 910 square degrees.
The search for possible associated signals in the electromagnetic spectrum has begun. You can follow this in the associated GCN Circulars (see below).
https://gracedb.ligo.org/superevents/S250206dm/view/ [GraceDB]
https://gcn.nasa.gov/circulars?query=S250206dm [associated GCN Circulars]
Constraining the equation of state in #NeutronStar cores via the long-ringdown signal: https://www.nature.com/articles/s41467-025-56500-x -> Tuning forks in space - a final pure “tone” may reveal interior of neutron stars: https://aktuelles.uni-frankfurt.de/english/tuning-forks-in-space-a-final-pure-tone-may-reveal-interior-of-neutron-stars/
NatureConstraining the equation of state in neutron-star cores via the long-ringdown signal - Nature CommunicationsGravitational-wave observatories explore nuclear matter properties under extreme conditions in neutron star mergers. Here, authors link the gravitational-wave signals from these mergers to the equation of state at the highest densities.
#FastRadioBursts originate near the surface of stars
Rare burst indicates #FRB likely originate near the star and that they share a feature with emissions of #pulsars, another subtype of #neutronstar.
Data regarding #FRB20221022A seem pretty clear, Key question is whether this particular FRB tells us much about all other FRBs observed, including those from repeating sources. It remains entirely possible more than one type of event produces something that looks like an FRB
https://arstechnica.com/science/2025/01/new-findings-get-us-closer-to-knowing-what-causes-radio-bursts/
Ars Technica · Fast radio bursts originate near the surface of stars
Here's my latest space simulation video! I haven't really done much with orbital decay before so this was interesting! Once again, I've added a soundtrack to my video, no VFX this time though. That's because it already looked very cool! Because of how the video was rendered, the accretion disk has this interesting sparkling effect.
youtu.be- YouTubeEnjoy the videos and music you love, upload original content, and share it all with friends, family, and the world on YouTube.
#KnowledgeBit: #Pulsar and #Star
A #Pulsar (from pulsating radio source) is a highly magnetized rotating #NeutronStar that emits beams of electromagnetic radiation out of its magnetic poles. Pulsars aren't really stars or at least they aren't "living" stars.
Pulsars form when a star more massive than the sun runs out of fuel in its core and collapses in on itself.
Understanding mysterious magnetars 
and radio bursts 
with gravitational waves
A flash of radio waves lasting a few thousandths of a second, as bright as millions or billions of stars, and it’s all over: even almost 20 years after their discovery, fast radio bursts remain one of the most mysterious phenomena in our Universe. Scientists believe that neutron stars – very small and extremely dense stellar remnants with huge magnetic fields – emit these bursts.
An international team has now used gravitational waves to study a nearby neutron star that has emitted several radio bursts. The researchers analyzed data from the German-British GEO600 detector to learn more about the origin of these events. Their results contribute to a better understanding of these extreme events and their theoretical description.
https://iopscience.iop.org/article/10.3847/1538-4357/ad8de0 [Open Access]
#Magnetar #FRB #FastRadioBurst #GravitationalWaves #GEO600 #NeutronStar #SGR1935+2154
