@mpi_grav@social.mpdl.mpg.de
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mpi_grav

@mpi_grav@social.mpdl.mpg.de

The Max Planck Institute for Gravitational Physics is the world's largest research institute specialized in general relativity and beyond. / Das Max-Planck-Institut für Gravitationsphysik ist die weltweit größte Forschungseinrichtung zur Allgemeinen Relativitätstheorie und darüber hinausgehenden Themen.

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mpi_grav, to physics German
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📣 Postdoc job alert 📣

The “Astrophysical and Cosmological Relativity” department at the @mpi_grav in Potsdam announces the opening of several postdoctoral appointments.

These appointments will be in the area of data analysis and its interface with waveform modeling for the recently adopted space-based gravitational-wave detector LISA.

ℹ️ https://www.aei.mpg.de/1155448/acr-lisa-postdoc

📅 apply by May 21, 2024

mpi_grav, to Potsdam German
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📣 Stellen für Postdoktorand*innen 📣

Mehrere Postdoc-Stellen in der Abteilung „Astrophysikalische und kosmologische Relativitätstheorie“ am @mpi_grav in Potsdam: Diese sind in den Bereichen der Datenanalyse und deren Schnittstelle mit der Wellenformmodellierung für den kürzlich beschlossenen weltraumgestützten Gravitationswellendetektor LISA.

ℹ️ https://www.aei.mpg.de/1155467/acr-lisa-postdoc

📅 bewerbt euch bis zum 21. Mai 2024

mpi_grav, to random
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Wow! The universe seems quite active right now: The gravitational-wave detectors have observed three possible binary black hole mergers in the past three days.

May 11: S240511i
ℹ️ https://gracedb.ligo.org/superevents/S240511i/view/

May 12: S240512r
ℹ️ https://gracedb.ligo.org/superevents/S240512r/view/

May 13: S240513ei
ℹ️ https://gracedb.ligo.org/superevents/S240513ei/view/

In all three cases, the direction of origin of the gravitational waves could be determined fairly precisely.

@LIGO

Map of the entire sky, on which the areas in which the gravitational wave candidate S240512r is located are marked in shades of orange. There is a 90% probability that it comes from an area of only 216 square degrees.
Map of the entire sky, on which the areas in which the gravitational wave candidate S240513ei is located are marked in shades of orange. There is a 90% probability that it comes from an area of only 362 square degrees.

mpi_grav, to physics German
@mpi_grav@social.mpdl.mpg.de avatar

📣 Postdoc job alert 📣

The “Astrophysical and Cosmological Relativity” department at the @mpi_grav in Potsdam announces the opening of several postdoctoral appointments.

These appointments will be in the area of data analysis and its interface with waveform modeling for the recently adopted space-based gravitational-wave detector LISA.

ℹ️ https://www.aei.mpg.de/1155448/acr-lisa-postdoc

📅 apply by May 21, 2024

mpi_grav, to random German
@mpi_grav@social.mpdl.mpg.de avatar

New profile picture 🖼️

Neutron stars typically have about 40 % more mass than our Sun with a diameter of only about 20 kilometres. This image shows a neutron star next to Hannover, a site of the @mpi_grav.

Researchers from the permanent independent research group “Continuous Gravitational Waves” use these very waves to search for otherwise invisible neutron stars.

Pic: NASA's Goddard Space Flight Centre

mpi_grav, to random German
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On Sunday, the Universe produced the next merger of two black holes, which Virgo an @LIGO in Livingston and Hanford then observed

❓ ⚫🌀⚫
📏 14.7 ± 4.3 billion light years
🔭 1782 square degrees

ℹ️ https://gracedb.ligo.org/superevents/S240501an/ [GraceDB]

📄 https://gcn.nasa.gov/circulars/36397 [GCN]

mpi_grav, to random German
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Anders als wir hatte das Universum gestern keinen freien Tag und hat für @LIGO in Hanford und Livingston und für Virgo eine Verschmelzung zweier Schwarzer Löcher produziert.

❓ ⚫🌀⚫
📏 15.7 ± 4.3 Milliarden Lichtjahre
🔭 1458 Quadratgrad (Sternbild Bildhauer)

ℹ️ https://gracedb.ligo.org/superevents/S240501an/ [GraceDB]

📄 https://gcn.nasa.gov/circulars/36356 [GCN]

mpi_grav,
@mpi_grav@social.mpdl.mpg.de avatar

Wenn ihr jetzt sagt „Mooooment, das Universum ist doch erst 13,8 Milliarden Jahre alt. Wie kann das Signal aus einer Entfernung von 15,7 MIlliarden Lichtjahren kommen?!“, dann habt ihr bemerkt, dass das Entfernungsmessen in einem sich ausdehnenden Universum nicht trivial und auf verschiedene, aber eindeutige Arten möglich ist. Die Entfernung hier ist die „Leuchtkraftentfernung“.

Die Schwarzen Löcher sind verschmolzen, als das Universum ca. 7 Milliarden Jahre alt war.

mpi_grav,
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@2ndStar Und immer wieder aufs Neue abgespaced.

Genauso wie die Tatsache, dass wir Glück haben, jetzt zu leben und nicht in ferner Zukunft, in der die beschleunigte Ausdehnung das sichtbare Universum wieder so klein gemacht hat, dass wir kaum oder keine anderen Galaxien mehr sehen können.

What a time to be alive…

mpi_grav, to random
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Last night there was another candidate for gravitational waves from a merger of a binary black holes.

❓ ⚫🌀⚫
📏 2.5 ± 0.6 billion light years
🔭 286 square degrees (constellation of Cancer)

ℹ️ https://gracedb.ligo.org/superevents/S240428dr/view/ [GraceDB]

📄 https://gcn.nasa.gov/circulars/36340 [GCN]

mpi_grav, to space
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“Hopes of Big Bang Discoveries Ride on a Future Spacecraft” article in @QuantaMagazine on @LISA and how this ESA mission will be a new probe of primordial processes.

📰 https://www.quantamagazine.org/hopes-of-big-bang-discoveries-ride-on-a-future-spacecraft-20240417/

mpi_grav, to Astronomy
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Join the Search for Pulsars: Help @einsteinathome scientists to identify these amazing cosmic lighthouses!

Join our Zooniverse citizen science project “Einstein@Home: Pulsar Seekers”

➡️ https://www.zooniverse.org/projects/rsengar/einstein-at-home-pulsar-seekers

Also available on the Zooniverse mobile app.

mpi_grav, to Astronomy
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On Saturday there was another possible gravitational-wave signal, this time observed by three detectors (both @LIGO instruments and Virgo).

This allowed the sky position to be determined fairly accurately.

It is probably the merger of two black holes or of a neutron star with a black hole at a distance of around 1.7 billion light years.

ℹ️ https://gracedb.ligo.org/superevents/S240413p/view/

mpi_grav, to random German
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Donnerstag dreht sich der Monatsvortrag in der Volkssternwarte Hannover um Einsteins Relativitätstheorie. Den Vortrag über ihre Grundlagen, Vorhersagen und Tests hält @benknispel.

➡️ https://sternwarte-hannover.de/vortraege/

Einlass ist spätestens um 19:30 Uhr, meist früher. Der Vortrag beginnt spätestens um 20:00 Uhr, sollte der Vortragsraum bereits vorher voll sein, auch früher.

Bild: ESO/Landessternwarte Heidelberg-Königstuhl/F. W. Dyson, A. S. Eddington, & C. Davidson

mpi_grav, to random
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When a neutron star meets an unusual black hole: Shortly after the start of the fourth observing run, the @LIGO/Virgo/KAGRA collaborations detected a remarkable gravitational-wave signal.

Our press release from Friday evening (local time) on the first publication from the fourth observing run of the international gravitational-wave detector network.

ℹ️ https://www.aei.mpg.de/1138125/mysterious-object-in-the-gap

mpi_grav, to random German
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🎞️ Aaand action! 🎞️

This visualisation shows the merger of a mass-gap black hole (dark grey) with a neutron star (orange) similar to GW230529 observed by @LIGO. The colours show the neutron stars' increasing density from dark orange to white. The emitted gravitational waves are shown in light blue.

Animation: I. Markin, T. Dietrich, H. Pfeiffer, A. Buonanno / @unipotsdam / @mpi_grav

video/mp4

mpi_grav, to random German
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🚨 Mysterious object in the gap – Shortly after the start of the fourth observing run, the @LIGO-Virgo-KAGRA collaborations detected a remarkable gravitational-wave signal. 😲

It's from the merger of a neutron star with an unknown compact object, most likely an unusually light-weight black hole falling into the “lower mass gap” between the heaviest neutron stars and the lightest black holes.

ℹ️ https://www.aei.mpg.de/1138125/mysterious-object-in-the-gap

mpi_grav, to random
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The @LIGO- and Virgo detectors are preparing for the start of the second half of the fourth observation run (April 10). The first measurement data is already being collected, which looks promising. 👍

This diagram shows (over the last 48 hours) the distance from which they can detect the merger of two neutron stars via gravitational waves. 🌟🌀🌟

mpi_grav,
@mpi_grav@social.mpdl.mpg.de avatar

We have compiled further information on the current state of gravitational-wave astronomy, many links to other sites, and pointers to helpful apps you might like:

➡️ https://www.aei.mpg.de/26370/current-gravitational-wave-astronomy

mpi_grav, to random German
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🚨 Gravitational-wave detector network restarts fourth observing run ⚫🌀⚫

Next week, the @LIGO and Virgo detectors will resume their observing campaigns, which promise to collect more than 200 gravitational-wave events by the end of this current observing run (O4) in early 2025. @mpi_grav scientist have made key contributions to the detectors and the analysis of the data they provide.

ℹ️ https://www.aei.mpg.de/1141790/gravitational-wave-detector-network-restarts-fourth-observing-run

mpi_grav, to science German
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📣 Young Scientist Award of the Physical Society of Japan for Sho Fujibayashi

Postdoc at the Max Planck Institute for Gravitational Physics honored for his research on neutron star mergers

➡️ https://www.aei.mpg.de/1131771/young-scientist-award

mpi_grav, to random German
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Wer's gestern verpasst hat, kann die aktuelle Folge „Space Night Science“ über Frauen in der Astrophysik mit vielen weiblichen Vorbildern in der ARD-Mediathek anschauen.

Im Studio (und einem Beitrag in der Sendung): Michèle Heurs von der @unihannover, unser Gravitationswellen-Detektor GEO600, das Einstein-Teleskop, @LISA, das Deutsche Zentrum für Astrophysik und vieles mehr!

🎞️ https://www.ardmediathek.de/video/space-night-science/frauen-im-all/ard-alpha/Y3JpZDovL2JyLmRlL3ZpZGVvLzA0NjQyODVmLTJkMDAtNGZhYi05ZDg5LWUwY2ExNzI1OWIzZQ

mpi_grav, to lisa German
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Wie wäre es mit einem ganz besonderen Kuchen am Morgen? Kolleg:innen am @mpi_grav in Potsdam haben die Adoption der Weltraummission @LISA gefeiert. Bild: M. Zumalacárregui

How about a very special cake in the morning? Colleagues at @mpi_grav in Potsdam celebrated the adoption of the @LISA space mission. Pic: M. Zumalacárregui

mpi_grav, to TimeTravel German
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“Can information travel to the past? Wormholes that function as time machines are a theoretical possibility within the laws of physics”

An article in El País by Ana Alonso-Serrano, researcher at the Humboldt University of Berlin and at the @mpi_grav in Potsdam.

➡️ https://english.elpais.com/science-tech/2024-02-12/can-information-travel-to-the-past.html

mpi_grav, to physics German
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Angela Borchers Pascual is a PhD student in the @maxplanckgesellschaft independent research group “Binary Merger Observations and Numerical Relativity”. She is working on understanding the imprint of gravitational kicks in the gravitational-wave signals emitted by merging black hole binaries.

ℹ️ https://www.aei.mpg.de/632031/angela-borchers-pascual

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