#EHT

2025-05-13

This image shows the region around the Milky Way's central supermassive black hole, known as Sagittarius A* (Sgr A*), in infrared (orange and purple) and X-ray light (blue). The image is scanned from left to right and the data are transformed into sound. The brightness of the objects is represented by the volume, while the vertical positions of the sources in the image are mapped to musical pitches. X-rays are played with a soft synthesizer and the infrared data are heard as bass notes and plucked sounds. The brightest region in the middle of the image (and hence the loudest) is where Sgr A* the black hole, resides. It is within this area that the Event Horizon Telescope was able to peer to obtain the first image of Sgr A* itself.

About the Sound:

The image is scanned from left to right with brightness controlling the volume.

The vertical position is mapped to musical pitches with higher pitches toward the top.

The mid-IR layer is limited to a low range and played on a bass.

The X-ray layer is limited to a high range and played on a soft synth.

The brightest regions in the X-ray image (including Sgr A*) are highlighted by increasing the brightness of the synth's sound.

Listen for a peak at the location of the supermassive black hole Sagittarius A* at the 14 second mark.

The near IR layer covers the full pitch range.

The stars visible in the near-IR image are played on a plucked distorted synth.

The stereo pan follows the scan from left to right.

chandra.harvard.edu/photo/2022

#space #galaxy #milkyway #astrophotography #photography #science #nature #EHT #CHANDRA #NASA

2025-05-13

Sagittarius A* EHT Radio Sonification

* Sonification Credit: NASA/CXC/SAO/K.Arcand, SYSTEM Sounds (M. Russo, A. Santaguida);
* Image Credit: Radio: EHT Collaboration; X-ray (NASA/CXC/SAO); Infrared (NASA/HST/STScI)
[Runtime: 00:32]

This is a sonification — translation into sound — of the latest image from the Event Horizon Telescope of the supermassive black hole at the center of the Milky Way called Sagittarius A* (Sgr A*). Using a radar-like scan, the sonification begins at the 12 o'clock position and sweeps clockwise. Changes in volume represent the differences in brightness the EHT observed around the event horizon of Sgr A*. The material that is closer to the black hole and hence moving faster corresponds to higher frequencies of sound. This sonification was processed in a special way to allow a listener to hear the data in 3D stereo sound, in which the sounds seem to start directly ahead and then move clockwise to one ear then the other as the sweep is made.

About the Sound:

This is a radar-like scan, starting from 12 o'clock and moving clockwise.

The brightness controls the volume and the radial position controls the frequencies that are present.

The emission from material closer to the black hole (which orbits faster) is mapped to higher frequencies.

The sound is rendered in binaural audio. When listened to with headphones, the sound will appear to start directly in front of you and then move clockwise all the way around your head.

Listen for the three bright regions at about 1, 5, and 9 o'clock, as well as the very low tones indicating fainter light from outside the main ring.

chandra.harvard.edu/photo/2022

#space #galaxy #milkyway #astrophotography #photography #astrophysics #science #nature #CHANDRA #EHT #NASA

2025-05-13

Swirling Magnetic Field around Our Galaxy's Central Black Hole
* Image Credit: EHT Collaboration
eventhorizontelescope.org/orga

Explanation:
What's happening to the big black hole in the center of our galaxy? It is sucking in matter from a swirling disk -- a disk that is magnetized, it has now been confirmed. Specifically, the black hole's accretion disk has recently been seen to emit polarized light, radiation frequently associated with a magnetized source. Pictured here is a close-up of Sgr A*, our Galaxy's central black hole, taken by radio telescopes around the world participating in the Event Horizon Telescope (EHT) Collaboration. Superposed are illustrative curved lines indicating polarized light likely emitted from swirling magnetized gas that will soon fall into the 4+ million solar mass central black hole. The central part of this image is likely dark because little light-emitting gas is visible between us and the dark event horizon of the black hole. Continued EHT monitoring of this and M87's central black hole may yield new clues about the gravity of black holes and how infalling matter creates disks and jets
pwg.gsfc.nasa.gov/Education/Im
apod.nasa.gov/apod/ap140323.ht
youtube.com/watch?v=60qnTvDbOZ
eventhorizontelescope.org/scie
eventhorizontelescope.org/blog

apod.nasa.gov/apod/ap240401.ht

#space #galaxy #milkyway #astrophotography #photography #science #nature #EHT #NASA

2024 April 1
A donut-shaped orange figure is seen with lines extending along the emission in a swirling pattern. Please see the explanation for more detailed information.

Swirling Magnetic Field around Our Galaxy's Central Black Hole
 * Image Credit: EHT Collaboration

Explanation: 
What's happening to the big black hole in the center of our galaxy? It is sucking in matter from a swirling disk -- a disk that is magnetized, it has now been confirmed. Specifically, the black hole's accretion disk has recently been seen to emit polarized light, radiation frequently associated with a magnetized source. Pictured here is a close-up of Sgr A*, our Galaxy's central black hole, taken by radio telescopes around the world participating in the Event Horizon Telescope (EHT) Collaboration. Superposed are illustrative curved lines indicating polarized light likely emitted from swirling magnetized gas that will soon fall into the 4+ million solar mass central black hole. The central part of this image is likely dark because little light-emitting gas is visible between us and the dark event horizon of the black hole. Continued EHT monitoring of this and M87's central black hole may yield new clues about the gravity of black holes and how infalling matter creates disks and jets. 

Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (UMCP)
NASA Official: Amber Straughn Specific rights apply.
2025-05-13

The Milky Way's Black Hole
* Image Credit: X-ray - NASA/CXC/SAO, IR - NASA/HST/STScI; Inset: Radio - Event Horizon Telescope Collaboration
eventhorizontelescope.org/
stsci.edu/
chandra.harvard.edu/

Explanation:
There's a black hole at the center of the Milky Way. Stars are observed to orbit a very massive and compact object there known as Sgr A* (say "sadge-ay-star"). But this just released radio image (inset) from planet Earth's Event Horizon Telescope is the first direct evidence of the Milky Way's central black hole. As predicted by Einstein's Theory of General Relativity, the four million solar mass black hole's strong gravity is bending light and creating a shadow-like dark central region surrounded by a bright ring-like structure. Supporting observations made by space-based telescopes and ground-based observatories provide a wider view of the galactic center's dynamic environment and an important context for the Event Horizon Telescope's black hole image. The main panel image shows the X-ray data from Chandra and infrared data from Hubble. While the main panel is about 7 light-years across, the Event Horizon Telescope inset image itself spans a mere 10 light-minutes at the center of our galaxy, some 27,000 light-years away.
nasa.gov/image-article/sagitta
apod.nasa.gov/apod/ap070114.ht
www6.slac.stanford.edu/researc
eventhorizontelescope.org/blog

#space #galaxy #milkyway #astrophotography #photography #science #nature #EHT #NASA

2022 May 13

The Milky Way's Black Hole
 * Image Credit: X-ray - NASA/CXC/SAO, IR - NASA/HST/STScI; Inset: Radio - Event Horizon Telescope Collaboration

Explanation: 
There's a black hole at the center of the Milky Way. Stars are observed to orbit a very massive and compact object there known as Sgr A* (say "sadge-ay-star"). But this just released radio image (inset) from planet Earth's Event Horizon Telescope is the first direct evidence of the Milky Way's central black hole. As predicted by Einstein's Theory of General Relativity, the four million solar mass black hole's strong gravity is bending light and creating a shadow-like dark central region surrounded by a bright ring-like structure. Supporting observations made by space-based telescopes and ground-based observatories provide a wider view of the galactic center's dynamic environment and an important context for the Event Horizon Telescope's black hole image. The main panel image shows the X-ray data from Chandra and infrared data from Hubble. While the main panel is about 7 light-years across, the Event Horizon Telescope inset image itself spans a mere 10 light-minutes at the center of our galaxy, some 27,000 light-years away. 

Authors & editors: Robert Nemiroff (MTU) & Jerry Bonnell (UMCP)
NASA Official: Phillip Newman Specific rights apply.
NASA Web Privacy Policy and Important Notices
A service of: ASD at NASA / GSFC
& Michigan Tech. U.
Dr. Juande Santander-Velajuandesant@astrodon.social
2025-04-10

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

#ALMA #AtacamaLargeMillimeterSubmillimetreArray #AtacamaLargeMillimeterArray #EHT #EventHorizonTelescope #BH #BlackHole #SuperMassiveBlackHole #SMBH #EHTBlackHole #RealBlackHole

Dr. Juande Santander-Velajuandesant@astrodon.social
2025-03-25

EHT Reveals New Insights of Jets from Supermassive Black Holes. ALMA is a big part of EHT, and in this case provided the most accurate calibration for the observations, which was used later for the longer baselines between EHT telescopes.

ps. IAA-CSIC plays a strong role in EHT and this news, and is where I got my Ph.D., so this is doubly important for me.

almaobservatory.org/en/audienc

#ALMA #AtacamaLargeMillimeterSubmillimeterArray #AtacamaLargeMillimeterArray #EHT #EventHorizonTelescope #IAACSIC #IAA #CSIC #InstitutoAstrofísicaAndalucía #InstitutoAstrofisicaAndalucia #CentroSuperiorInvestigacionesCientíficas #CentroSuperiorInvestigacionesCientificas

Schematic view of an active galactic nucleus (AGN). The relativistic jet is launched from the black hole and its accretion disk in a parabolic geometry, later transitioning to a conical appearance. Credit: J. Röder/M. Wielgus.Artist’s impression of an active galactic nucleus. Credit: Juan Carlos Algaba.
2025-03-12

えー、再度購入商品を確認したところ、購入したのは "Lexar 公式ストア" を名乗る #旭東トレーディング のSUNEAST ULTIMATE PROストアが販売する "オンライン専売品エコーパッケージ" というもので、袋に入っただけの #SSD が届くのは正常のようです。 #EHT に対する風評被害を招いてしまったことをお詫び申し上げます

2025-03-12

ボケっとしながら #Amazon#SUNEAST#SSD を買わせたら、袋に入っただけのSSDが届いて唖然とした。よく見直してみると正規代理店の #旭東エレクトロニクス が運営するSUNEASTストアではなく #EHT が販売し商品で、EHT自体は組み込みPCとかそういう物を販売するのがメインのお仕事らしい。つまりこれってEHTがPCに組み込まなかったのをバラ売りしてるってことじゃねえか!

Goethe-Universität:
"
Das Schwarze Loch M87*: Was sich in einem Jahr verändert hat
"
"Jetzt wertete die EHT Collaboration zusätzlich die Daten der Messkampagne von 2018 aus. Das Ergebnis: Die hellere Region im Ring um M87* hat sich verschoben, .."

aktuelles.uni-frankfurt.de/en/

23.1.2025

#Akkretionsscheibe #Astronomie #Astrophysik #EHT #FFM #GoetheUniversität #M87 #M87* #SchwarzesLoch

2025-01-23

ZME Science: This Supermassive Black Hole Shot Out a Jet of Energy Unlike Anything We’ve Seen Before…

When the Event Horizon Telescope (EHT) unveiled the first image of a black hole in 2019, the world got its first glimpse into the glowing halo surrounding the supermassive black hole at the center of the galaxy M87, also known as Virgo A or NGC 4486... ZME Science #space #antimatter #blackholes #EHT #galaxies #gammarays

formuchdeliberation.wordpress.

AkaSci 🛰️AkaSci@fosstodon.org
2025-01-17

The sweetest post of the day!
"Keep your eye on the donut and not on the hole."
👏
#DavidLynch #NASA #BlackHole #EHT

Tweet from NASA
@NASA
Keep your eye on the donut and not on the hole.

In memory of David Lynch, we will continue to explore the otherworldly and the unknown. We will focus not on the loss, but on what we gained from the years we shared this planet with you. We will see you in our dreams.

With donut-shaped image of supermassive black hole in the center of Messier 87 (M87) taken by the Event Horizon Telescope in 2019
2024-12-19

ZME Science: This Supermassive Black Hole Shot Out a Jet of Energy Unlike Anything We’ve Seen Before…

When the Event Horizon Telescope (EHT) unveiled the first image of a black hole in 2019, the world got its first glimpse into the glowing halo surrounding the supermassive black hole at the center of the galaxy M87, also known as Virgo A or NGC 4486... ZME Science #space #antimatter #blackholes #EHT #galaxies #gammarays

formuchdeliberation.wordpress.

Andrew J. Steinmetzajsteinmetz.com@bsky.brid.gy
2024-12-02

(1/4) "Size comparison of the two #BlackHoles imaged by the Event Horizon Telescope #EHT Collaboration: M87*, at the heart of the galaxy Messier 87, and Sagittarius A* (Sgr A*), at the centre of the Milky Way." #Science #Physics #Astronomy #Space 🧪🔭⚛️🧵 Credit: EHT collab. (and: Lia Medeiros, xkcd)

Size comparison of the two black holes imaged by the Event Horizon Telescope (EHT) Collaboration: M87*, at the heart of the galaxy Messier 87, and Sagittarius A* (Sgr A*), at the centre of the Milky Way. The image shows the scale of Sgr A* in comparison with both M87* and other elements of the Solar System such as the orbits of Pluto and Mercury. Also displayed is the Sun’s diameter and the current location of the Voyager 1 space probe, the furthest spacecraft from Earth. M87*, which lies 55 million light-years away, is one of the largest black holes known. While Sgr A*, 27 000 light-years away, has a mass roughly four million times the Sun’s mass, M87* is more than 1000 times more massive. Because of their relative distances from Earth, both black holes appear the same size in the sky. Source: https://www.eso.org/public/images/eso2208-eht-mwe/
Louis Marmet 🇨🇦redshiftdrift@astrodon.social
2024-11-02

#BlackHole #EHT
"First Image of Milky Way Black Hole May Be Actually Be Entirely Wrong"

We already knew that in 2019, Anton.

🔗youtu.be/cdeee7tZ8QY

scinexx - das wissensmagazinscinexx@nrw.social
2024-10-30

Oval statt Kreis? Das erste Foto vom Schwarzen Loch der Milchstraße zeigt möglicherweise nicht sein wahres Aussehen, wie nun astronomische Neuanalysen nahelegen. #SagittariusA #SchwarzesLoch #EHT #Radioastronomie #Astronomie #Milchstrasse
scinexx.de/news/kosmos/ist-die

#DerStandard:
"
Bild des Schwarzen Lochs im Zentrum der Milchstraße soll fehlerhaft sein

Ein japanisches Forschungsteam äußert Zweifel an der berühmten Aufnahme. Der dunkle Fleck soll ein Artefakt sein. Fachleute verteidigen das Bild
"
derstandard.at/story/300000024

29.10.2024

#Astronomie #Bildanalyse #EHT #EHTC #Japan #M87 #NAOJ #SagittariusA* #SchwarzesLoch #SgrA* #SMHB #VLBI

Prof Heino Falckehfalcke
2024-10-29

Here is a first statement by the 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.

eventhorizontelescope.org/blog

Pᵉtɘr Wᵉil8acherPWei888@astrodon.social
2024-10-25

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

2024-10-07

@hfalcke

Movies?

Figures.

The public is already bored with images of black holes.

Hope you get a big name director with star power!

😉

#astronomy #eht

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