Create accountLogin

Recent searches

No recent searches

Search options

Only available when logged in.
101010.pl is one of the many independent Mastodon servers you can use to participate in the fediverse.
101010.pl czyli najstarszy polski serwer Mastodon. Posiadamy wpisy do 2048 znaków.

Administered by:

Server stats:

500
active users

101010.pl: AboutStatusProfiles directoryPrivacy policy

Mastodon: AboutGet the appKeyboard shortcutsView source codev4.4.0-alpha.5

#eht

0 posts0 participants0 posts today
*
Dr. Juande Santander-Vela

Six years since ALMA crucially helped the Event Horizon Telescope take the first image of a supermassive black hole in a distant galaxy… you can relive it all below!

almaobservatory.org/en/press-r

www.almaobservatory.orgAstronomers Capture the First Image of a Black Hole | ALMA ObservatoryPress Conference Streaming The Event Horizon Telescope (EHT), a planet-scale array of eight ground-based radio telescopes forged through international collaboration, was designed to capture images of a black hole. Today, in coordinated press conferences across the globe, EHT researchers reveal that they have succeeded, unveiling the first direct visual evidence of a supermassive black hole...
#ALMA#AtacamaLargeMillimeterSubmillimetreArray#AtacamaLargeMillimeterArray
Prof Heino Falcke

Here is a first statement by the #EHT collaboration on Miyoshi et al 2024. There are numerous misleading statements about EHT data analysis (which involved multiple groups and multiple methods, addressing in depth all issue) and the image processing has basic flaws. As presented the image is not reproducible nor does he show any synthetic data tests that would make one believe his approach is reliable in this case. More analysis to follow.
#astrodon #astronomy
eventhorizontelescope.org/blog

eventhorizontelescope.orgResponse to An Independent Analysis of EHTC Imaging of Sgr A* by Miyoshi et al. 2024
Pᵉtɘr Wᵉil8acher

Interesting, the new Miyoshi paper has some pretty strong words about the EHT data "suggesting that the EHT 2017 u-v coverage is insufficient for reliable imaging" or "possible that the data are corrupted to the degree that the shape [...] cannot be determined from the residual analysis of the closure quantity". They do not see a ring but a strong peak, possibly offset from the black hole location.
#BlackHole #EHT #SgrA*
astrodon.social/@cosmos4u@scic

astrodon.socialAstrodon - The Astro Community
Prof Heino Falcke

@vicgrinberg Funny you mention this, but the picture on the left was taken by one of the operators at the IRAM 30m telescope when I was there in 2017 observing for the #EHT. (For comparison, the black hole picture on the right was calculated by the Shutterstock collaboration and published in the journal Business Standard - that I just came across by chance🤷🏼‍♂️).

Continued thread
*
AkaSci 🛰️

What is the EHT and how does it work?
EHT consists of a set of telescopes spread across the globe that collect precisely time-stamped data at 230 GHz and 345 GHz for several days. The data is post processed using a technique called Very Long Baseline Interferometry (VLBI), that makes the set of telescopes behave like one large planetary-scale (imperfect) telescope. Some sophisticated algorithms are used to generate images that best fit the data and theoretical models of black holes.
#EHT
5/n

Continued thread
*
AkaSci 🛰️

Here is a graphic with a comparison between Sagittarius A*, the supermassive black hole (SMBH) at the center of our galaxy and the SMBH in galaxy M87.

There is a tremendous difference in the mass and event horizon diameter values of the two black holes.

But the two black holes have strong similarities in overall shape, the shape of the plasma and magnetic fields, and various other properties.

eso.org/public/news/eso2406/
eso.org/public/news/eso2105/
#EHT
4/n

Continued thread
*
AkaSci 🛰️

The spiraling pattern seen in the polarized light image of Sgr A* is caused by hot plasma swirling around the black hole which causes strong magnetic fields.

The magnetic field is shaped by its strength and the rotation of the plasma around the black hole. Light emitted from the plasma is "polarized" perpendicular to the magnetic field depending on its strength. Imaging in polarized light reveals the shape and strength of the magnetic fields.

youtube.com/watch?v=6xrJoPjfJG
#EHT
2/n

*
AkaSci 🛰️

The Event Horizon Telescope org. just released this swirling "image" of Sagittarius A*, the supermassive black hole (SMBH) at the center of our galaxy. The spiral lines in the composite image is based on measurements of polarized light emitted by surrounding plasma and highlights the magnetic field around the black hole.

The spiral structure is a result of the strong magnetic field around the black hole, which is caused and shaped by the swirling plasma.

eventhorizontelescope.org/blog
#EHT
1/n

Dr. Juande Santander-Vela

ALMA, as part of the Event Horizon Telescope, is unveiling a new image of our Milky Way's supermassive black hole, Sagittarius A*, in which strong magnetic fields can be seen…

The most exciting part is that this hints to a jet that would be hidden from our vantage point in our galaxy… but imagine that! We might be like M87, just at a smaller scale!

almaobservatory.org/en/press-r

#ALMA#AlmaObservatory#EHT
Continued thread
Prof Heino Falcke

BTW, 30 years ago, I proposed a model for the black hole in the center of the Milky Way saying that the radio mission can be explained by a hidden jet. This predicted the existence of radio light at the edge of the black hole and led to the prediction of a black hole shadow, that was observed two years ago by the EHT. The idea of a hidden jet remained controversial. It is exciting to see the tantalizing evidence coming from the #EHT polarization images, which supports the hypothesis. #astrodon

Prof Heino Falcke

New!! Observations of our Event Horizon Telescope (#EHT) collaboration have uncovered strong & organized magnetic fields spiraling around the edge of the supermassive black hole Sagittarius A* (Sgr A*). Images in polarized light of the #blackhole in the Milky Way center reveal structures similar to those in M87*, suggesting that strong magnetic fields may be common to all black holes. This also hints toward a hidden jet in Sgr A*!
#astronomy #astrodon #scicomm #physics

ru.nl/en/about-us/news/astrono

*
Hraban (fiëé visuëlle)

Wird die (Röntgen-)Emission des Schwarzen Lochs in der Mitte unserer Galaxis eigentlich kontinuierlich gemessen? Gibt’s ein Diagramm?
Ich habe auf die Schnelle nichts dazu gefunden. Würde mich aus ESOterischen Gründen interessieren 😉

@dlr_next ?

eso.org/public/germany/news/es
#eht #EventHorizonTelescopeEHT #astronomy #astronomie

www.eso.orgAstronomen enthüllen erstes Bild des schwarzen Lochs im Herzen unserer GalaxieHeute haben Astronomen bei gleichzeitigen Pressekonferenzen auf der ganzen Welt, darunter auch am Hauptsitz der Europäischen Südsternwarte (ESO) in Deutschland, das erste Bild des supermassereichen schwarzen Lochs im Zentrum unserer eigenen Milchstraßengalaxie präsentiert. Dieses Ergebnis liefert überwältigende Beweise dafür, dass es sich bei dem Objekt tatsächlich um ein schwarzes Loch handelt, und liefert wertvolle Hinweise auf die Funktionsweise solcher Giganten, von denen man annimmt, dass sie sich im Zentrum der meisten Galaxien befinden. Das Bild wurde von einem globalen Forschungsteam, der Event Horizon Telescope (EHT) Collaboration, unter Verwendung von Beobachtungen aus einem weltweiten Netzwerk von Radioteleskopen erstellt.
ExploreLive feeds
About