Tech
James Webb Becomes a Dark Matter Pathfinder with a Little Trick
A little trick turned James Webb into a “hunter” for dark matter🇧🇷 By detecting extragalactic light in galaxy clusters, an infrared telescope can reveal the distribution of this invisible matter and provide us with a new perspective on the universe.
Dark matter is one of the biggest problems in physics because it is the only way to interact with baryonic matter (“normal” matter, which includes everything we can observe in any way).
Scientists are confident in the existence of dark matter because it has mass and therefore interacts gravitationally. In fact, observations of galaxies, gravitational lensing, and clusters of galaxies can only be explained by adding dark matter to their surroundings.
Extragalactic light and dark matter
Astronomers today know that this invisible matter is behind the formation and evolution of galaxies. One piece of evidence (pictured below) is gravitational lensing—when a very distant galaxy is enlarged by a cluster of galaxies closest to us. But these lenses are made up of more mass than would be expected if we ruled out dark matter.
Astronomers are also detecting the presence of dark matter in X-ray (pink) and baryonic (blue) maps of various clusters of colliding galaxies (image below). The map shows a clear separation between ordinary matter and gravitational effects, which is one of the strongest evidence for the existence of dark matter.
This does not mean that dark matter appears in the images; what happens is a little more complicated, but elegant. The X-rays in this case show where galaxy collisions create temperatures in excess of a few hundred thousand degrees, creating light that comes from outside the galaxies but inside the cluster.
This light is called “intergalactic light” because it comes from stars and other phenomena, including matter colliding in galaxy mergers, outside of individual galaxies. But not all intergalactic light is the result of only these processes with baryonic matter.
When galaxies interact within clusters, stars and tidal currents are removed and sent away from the galaxies they belong to. Although we cannot distinguish these individual stars, they still glow, emitting a faint intergalactic light.
As dark matter gravitationally pulls on these stars, light evolves as a dark matter trailblazer, as is the case with the Tadpole galaxy. Its massive tail is evidence of tidal interactions – when some kind of gravitational force pulls and stretches galactic matter, forming a filament that contracts under its own gravity, forming stars.
In the case of the Tadpole galaxy, the tail is roughly 280,000 light-years long, and it shows the stars, following the distribution of dark matter in that region, creating intergalactic light.
Despite the possibility of detecting dark matter with these methods, telescopes have so far not been able to provide enough detailed data for an even deeper study. This may change with the James Webb telescope.
James Webb discovered dark matter
In a new study published in Letters from an astrophysical journal researchers Mireya Montes and Ignacio Trujillo used the James Webb telescope with the method of observing intergalactic light to study dark matter.
The pair used the first deep field image from JWST and calibrated the data to extract more information about intergalactic light. In the three-frame animation below, we see the original deep field image, a color inverted version, and a version with enhanced contrast/brightness to enhance intergalactic light.
They found light created by light fusions and additions caused by external factors. There are many lights coming from outside the cluster of galaxies and entangled with the light within the cluster, but the duo managed to separate them all and eliminate the luminosity of the outer objects.
The remaining light suggests that galactic mergers within clusters are the primary source of star-forming intergalactic light. Because the matter that emits this luminosity responds to dark matter, the authors of the study showed that the dark matter tracking method is superior if James Webb’s data is used.
This technique has already existed with other infrared telescopes, but James Webb is the most powerful of them all. That is: we may have a lot of news about the dark matter of the universe in the near future.
Source: POPPY, Starts with a bang
NASA Lander InSight He has delivered what may be his last message from Mars as he embarks on a historic mission to uncover the secrets of the Red Planet’s interior.
In November, the space agency warned that the probe could be running out of time as dust continued to condense and stifle InSight’s power.
“Spacecraft power generation continues to decline as windblown dust accumulates on solar panels,” NASA said in a statement. Update November 2. “The end is expected to come in the coming weeks.”
message shared NASA The InSight Twitter account tweeted on Monday: “My power is very low so this might be the last photo I can upload. Don’t worry about me: my time here has been productive and uneventful. If I can keep talking to my mission team, I will—but I will.” Subscribe here soon. Thank you for staying with me.”
My power is very low, so this might be the last photo I can upload. But don’t worry about me: my time here has been productive and uneventful. If I can keep talking to my mission team, I will, but I’ll sign here soon. Thank you for staying with me. pic.twitter.com/wkYKww15kQ
— NASA InSight (@NASAInSight) December 19, 2022
A geologist robot armed with a hammer and a seismograph first reached the barren expanse of Elysium Planitia in November 2018.
Since then, she has carried out geological excavations, taking the first measurements of earthquakes with a high-tech seismometer placed right on the surface of Mars.
Last month, the solar-powered car released an update to remind us of its time in space.
“I was lucky to live on two planets. Four years ago I made it safely to the second one, much to the joy of my family at first. Thanks to my team for taking me on this journey of discovery. I hope I can be proud of you.”
According to the published mission, Insight has measured more than 1,300 seismic events since it was published, and more than 50 of them had signals clear enough for the team to extract information about their location on Mars. Results.
The probe’s data also provided detailed information about Mars’ interior, liquid core, surprisingly variable remnants beneath the surface of an extinct magnetic field, climate and seismic activity.
old for Its launch in 2018NASA Chief Scientist Jim Green said the mission was “fundamental to understanding the origins of our solar system and how it became what it is today.”
NASA will not declare the mission complete until Insight confirms the arrival of two spacecraft orbiting Mars that are relaying their information back to Earth.
In 2018, the veteran rover announced the capabilities end of his 15 year stay Sending an incomplete photo of the Valley of Perseverance.
A severe dust storm darkened the sky around the solar-powered rover, shattering the sun and leaving behind a dark image with white spots due to camera noise. The transmission is interrupted before the complete image can be transmitted.
Being very close companies, OPPO and OnePlus have decided to create a new partnership, with the latter being a pioneer in the market. It has become the representative of the best smartphones in the group, and this will be seen very soon.
Proving this, OnePlus has announced that it will have news soon. The following brand assets will be announced on February 7, 2023. We are talking about OnePlus 11 5G and Buds Pro 2.
In recent years, OnePlus has been showcasing new hardware in an attempt to find a new place in the market. The brand has not always seen its full potential, betting on mid-range or entry-level smartphones.
The situation is changing, and the novelty will go on sale in early 2023, February 7. It is on this day that the new OnePlus 11 5G will be presented with all the expected news. We definitely have the new Qualcomm Snapdragon 8 Gen 2 SoC here. There's still 16GB of storage left and 256GB of onboard storage.
It is expected that he will receive a 6.7-inch OLED display with a resolution of 1440p and a frequency of 120 Hz. In the field of photography, we will have an important change: a 50 MP main camera, a 48 MP ultra wide-angle camera and a 32 MP telephoto lens with 2x zoom. For selfies and video calls, you'll have a 16-megapixel camera.
The photography partnership with Hasselblad will continue with OnePlus for fine-tuning and some additions. This alliance has brought important results for the best smartphones of the brand, guaranteeing the best photos in any situation.
In addition to the new OnePlus 11 5G, another brand new feature is also expected to arrive at the event. We're talking about the Buds Pro 2, which are solidifying an audio commitment that's becoming more of a reality. The brand promises "rich stereo quality sound with crystal clear clarity".
Stays like this marked by the beginning of February, another important novelty will enter the market. OnePlus wants to reclaim its place, and that will be the brand's bet for years to come. OnePlus 11 5G and Buds Pro 2 take the first step in this direction.
According to information provided by Mukul Sharma, the unidentified POCO device can be identified by the model number 22127PC95I. Due to the fact that it was first seen online, the marketing name of this equipment is still a mystery.
POCO has not launched new mobile devices, including smartphones, to the market for some time now. On the other hand, several POCO smartphones such as POKO X5 and X5 Pro have been spotted on various certification sites, suggesting that the company will release these products soon. Today a new smartphone from the sub-brand xiaomi has been spotted on the BIS India website but the device does not have a name or any other details associated with it.
A new POCO device (model number 22127PC95I) has been included in the Indian BIS certification. POCO F5 has the model number 23013PC75I. #A LITTLE pic.twitter.com/NAFloP5Crt
— Mukul Sharma (@stufflistings) December 19, 2022
According to information provided by Mukul Sharma, the unidentified POCO device can be identified by the model number 22127PC95I. Due to the fact that it was first seen online, the marketing name of this equipment is still a mystery. It is possible that it will debut as a mid-range smartphone. The Bureau of Indian Standards (BIS) website, other than the model number of the smartphone, does not provide any additional information about the device. However, this seems to indicate that the product will be available in the Indian market very soon.
In other related news, POCO X5 5G has recently been seen on several certification sites including SIRIM in Malaysia, BIS in India and the US FCC. According to various sources, it is possible that this is a renamed or modified version Redmi Note 12 5Gwhich was recently released in China.
It is supposed to be equipped screen 6.67″ AMOLED display with 120Hz refresh rate and chipset Snapdragon 4 Gen 1 inside. Can run MIUI 13 based on android 12 and have LPDDR4x RAM in addition to UFS 2.2 storage. The front camera is rumored to be 8MP while the main rear camera will be 48MP with 2MP depth. May have the ability drums 5000 mAh and 33W fast charging support.
In addition POCO X5 Pro 5G has recently been seen on various sites dedicated to certification. The battery is said to have a capacity of 5000 mAh and can charge at 67W. It will come with MIUI 14 preinstalled and will support n5, n7, n38, n41, n77 and n78 network bands. 5G.
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