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#neutronstars

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I got a D on a test today. :Blobhaj_Read_MD: D for dense, or more specifically "Extremely Dense" :neobread:

A neutron star would probably get the same rating, right? :neofox_think_owo: I would think so. That implies Hypothesis 1.

It also means that according to science, lesbricks are in the same category of dense as a neutron star. :neofox_science: Thus I can recklessly assume that the mystery remains on whether or not lesbricks are denser than a neutron star. :vlpn_sparkle:

Hypothesis 1: Neutron stars are giant space titties.
Hypothesis 2: Lesbricks and Neutron stars are in the same density category.
Corollary (H1+H2): Lesbricks might have more tricky to interpret mammograms and should make sure they are regularly checking for lumps!

Five days ago marked the sixth anniversary of the detection of gravitational-wave signal GW190425 (astrodon.social/@mpi_grav/1143). It came from a binary neutron star merger.

These events emit both gravitational waves and electromagnetic signals. This could help solve long-standing questions in fundamental physics research with multi-messenger astrophysics.

For more information on multi-messenger astrophysics, see this article on our portal “Einstein Online”: einstein-online.info/en/spotli

Astrodon - The Astro CommunityMPI for Gravitational Physics (@mpi_grav@astrodon.social)Attached: 1 image On this day, six years ago, @LIGO Livingston and Virgo detected an unusual gravitational-wave signal. GW190425 was only the second signal from (most likely) a neutron star merger. Its distance to Earth was significantly larger and the sky position less precisely determined than for the first such signal (GW170817). Therefore, astronomers did not observe any afterglow in the electromagnetic spectrum. The total mass of the merging objects was unusually high compared to known double neutron stars. ℹ️ https://www.aei.mpg.de/142401/news-from-the-gravitational-universe The publication abuout the observed gravitational-wave signal appeared on 6 January 2020: 📄 https://iopscience.iop.org/article/10.3847/2041-8213/ab75f5 #OnThisDay #OTD #GW190425 #GravitationalWaves #NeutronStars #astronomy #astrodon
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In 2009, @einsteinathome expanded its scope to search for radio pulsars in data from the Arecibo radio telescope. Like a cosmic lighthouse, this type of neutron star emits regular pulses of radio waves that can be observed with large radio telescopes.

“We realized that Einstein@Home’s computing power could be put to good use by helping to search for pulsars in binary systems in data from the Arecibo pulsar survey,” says Bruce Allen. “We also knew that it would be many years before we and our volunteers might finally see the first continuous gravitational-wave detection. Finding new, possibly exotic, radio pulsars would keep all of us motivated toward that long-term goal.”

In the summer of 2010, Einstein@Home found a new radio pulsar in Arecibo data, marking the first astronomical discovery by a distributed volunteer computing project. The pulsar was a rare and unusual type of neutron star, with only a dozen similar examples known at the time. “This was a milestone for us and our volunteers. It proved that citizen science and public participation can make a difference in astronomy and other data-driven sciences,” says Bruce Allen.

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The long-term goal of @einsteinathome is to detect continuous gravitational waves. Astronomers believe that neutron stars – exotic, compact remnants of exploded massive stars – can produce these tiny ripples in space-time as they spin.

M. Alessandra Papa, leader of the permanent independent research group “Continuous Gravitational Waves” at the @mpi_grav in Hannover, Germany, explains:

“Since we started Einstein@Home our searches for continuous gravitational waves from unknown neutron stars have always been the most sensitive.

Thanks to the efficient analysis methods we have developed, we can make the best use of the enormous computing power donated by our volunteers. We are ‘digging deep’ for faint signals hidden in the gravitational-wave data and look forward to more data being released soon to farther our investigations.”

🎞️ YouTube: youtube.com/watch?v=7xIAHdDipN

🎞️ Invidious: inv.nadeko.net/watch?v=7xIAHdD

Continued thread

Bruce Allen, director of @einsteinathome and director at the @mpi_grav in Hannover, Germany, recalls:

“I had read about SETI@home in 1999 and thought that a distributed volunteer computing project to search for Einstein's gravitational waves would be a great way to involve the public and get more computing power. At the time, it seemed too ‘special interest’ to really work.

The idea really took off in 2004, when the American Physical Society, as part of its preparations for the World Year of Physics, offered to help recruit volunteers for our project called Einstein@Home.”

🎞️ YouTube: youtube.com/watch?v=MlCz_eNWEc

🎞️ Invidious: inv.nadeko.net/watch?v=MlCz_eN

To date, nearly half a million people have contributed to the project. On average, about 31,000 computers from 16,000 volunteers provide 13.3 petaflop/s (million billion floating point operations per second) of aggregate sustained computing power. If listed on the Top-500, Einstein@Home would be one of the 100 most powerful computers in the world.

🥳 Happy 20th birthday, Einstein@Home! 🎉

The distributed volunteer computing project was launched on this day in 2005.

Since the launch of @einsteinathome on 19 February 2005, nearly half a million participants from around the world have donated idle computing time on their PCs and smartphones to search for astrophysical signals from spinning neutron stars – small, massive, and exotic remnants of exploded stars.

Einstein@Home is one of the world’s largest volunteer computing projects and a scientific success story: It has discovered more than 90 new neutron stars, some of them very unusual, through their radio and gamma-ray pulsations. It is also conducting some of the most sensitive searches for continuous gravitational waves from unknown neutron stars in @LIGO data. Finding the elusive waves would provide a new astronomical tool for studying extreme gravity and matter and fundamental physics.

ℹ️ aei.mpg.de/1226437/happy-20th-

➡️ Join the fun at einsteinathome.org/join