News
An extremely massive white dwarf was able to escape the Hyades star cluster
The Hyades star cluster is located about 153 light years away. At such a short distance it is visible to the naked eye in the constellation Taurus. THIS proximity makes it easier for professional astronomers to observe than many other objects. The Hyades cluster contains many stars with approximately the same age – about 625 million years, the same metallicity and similar trajectories. But it lacks white dwarfs – there are only eight of them in the center of the cluster.
The Hyades cluster is quite common. His research greatly helps in understanding star clusters. But such a feature as the almost complete absence of white dwarfs puzzles astronomers.
A new study has found one escapee from the cluster. This is a white dwarf whose mass is approaching the limiting value for this type of star. The study is called “A White Dwarf That Was Able to Escape the Hyades Star Cluster.”
Clusters such as the Hyades are weakly gravitationally bound, and over time they lose stars through their interactions with gas clouds, other clusters, and between the cluster stars themselves. Study author David Miller of the Department of Physics and Astronomy at the University of British Columbia and his co-authors studied the phenomenon of the absence of white dwarfs in the Hyades to reconstruct the history of the cluster. If we can identify the stars that were expelled, especially white dwarfs in this case, then it is possible to reconstruct the history of the cluster.
The European Space Agency’s Gaia space telescope tracks more than 1 billion stars in the Milky Way, providing Miller and his colleagues with a huge amount of data. The team found three white dwarfs with trajectories indicating possible escape from the Hyades cluster. For two of them, the range of masses makes it unlikely that they originated in a cluster, but for the third object it is possible.
“We estimate there is a 97.8% probability that the candidate is a true native of the Hyades”
White dwarfs have a mass comparable to the Sun, but their size is comparable to the Earth. They consist of degenerate matter and emit only residual thermal energy. This is the final state of about 97% of the stars in the Milky Way. Their mass is governed by the Chandrasekhar limit and at maximum can reach about 1.44 solar masses. Large white dwarfs are usually found in binary star systems and gain mass by pulling matter from a companion; such white dwarfs eventually explode in a type 1a supernova, and all their mass is dissipated.
The white dwarf that left the Hyades is called an ultramassive white dwarf. These have a mass of 1.10 or more solar masses. This is well below the Chandrasekhar limit, but well above the average mass of a white dwarf, which is about 0.6 solar masses. Such high-mass objects typically originate from two parent stars in a binary system, where one star has “taken” material from the other, increasing its mass.
However, the Hyades ultramassive white dwarf has a mass of 1.317 solar masses and an age consistent with only one parent star. It appears to be the most massive white dwarf to come from a single progenitor.
In addition to the ultra-cheap Smart 8 HD smartphone, Infinix also presented a whole line of budget models: Hot 40.
It includes the junior model Hot 40i, basic Hot 40 and Hot 40 Pro. Pricing hasn’t been announced yet, but the company says they’ll all cost less than $200.
Hot 40 Pro, as expected, looks the most interesting. There is a camera with a resolution of 108 megapixels, a 120 Hz screen, and 8/128 or 8/256 GB of memory. The device is also equipped with a 5000 mAh battery with 33-watt charging, Helio G99 SoC and a 6.78-inch Full HD+ display.
The Hot 40 is similar to the older model, but it has a screen with a frame rate of 90 Hz, is based on the Helio G88 and a 50 MP camera. The remaining parameters are identical.
The younger model Hot 40i is more different. The heart here is the less productive SoC Unisoc T606, the basic amount of RAM is 4 GB, although there is also a version with 8 GB, the screen here has HD+ resolution with a diagonal of 6.56 inches and supports a frame rate of 90 Hz, and charging power is limited to 18 W. Other parameters are the same as Hot 40.
It is also worth noting that all models received IPS screens.
News
In 2024, Huawei will “rewrite industry history.” The company will release “advanced, innovative and revolutionary products”
For almost five years now, Huawei has been under strict American sanctions, and all this time the company has worked tirelessly. Now it may be time for a major push. At least the words of Yu Chengdong, CEO of Huawei’s consumer business group, indicate exactly that.
At Huawei’s annual reporting conference, Yu Chengdong promised to rewrite the history of the industry and announced completely new revolutionary devices. The top manager said the following verbatim: “When the time comes, you will see how we can rewrite the history of this industry. I hope to continue to exceed everyone’s expectations and do what others can’t even think of, or what they can’t do, or even what they don’t dare do.” And we were not talking about some distant future, but about 2024.
There are no specifics yet. But one of the breakthroughs could be the release of our own single-chip systems with 5G support – very well-established insiders are talking about this. Moreover, SMIC is rumored to be preparing to produce 5nm SoCs for Huawei. If this really happens, it can be called a breakthrough for the entire period of Huawei’s existence under sanctions. And next year, new, and far from trivial, cars are expected to be released on Huawei platforms and with the proprietary HarmonyOS operating system.
Phones
This ultra-cheap $75 smartphone offers a “premium” design and a 90Hz screen. Infinix Smart 8 HD unveiled
Infinix has announced the Smart 8 HD smartphone with a price of just $75. At the same time, the device is equipped much better than many smartphones priced at $100-120.
But it’s worth starting not even with this, but with design. As you can see, Infinix does not betray itself and even made an ultra-budget smartphone so that it stands out: the back cover seems to have a relief pattern. The company itself even uses the expression “premium design,” but this, of course, is on its conscience.
From a technical point of view, the device is not bad, and for such a price it is very good. It is based on the Unisoc T606 SoC, which scores about 240,000 points in AnTuTu 10. There is 3 GB of RAM, 64 GB of flash memory, a 13-megapixel main camera and a 5000 mAh battery. And the 6.6-inch screen with HD+ resolution also supports a frame rate of 90 Hz. In addition, there is an element that imitates the Dynamic Island of the iPhone.
It remains to add that the dimensions here are 164 x 75.6 x 8.5 mm with a weight of 184 g.
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