Chinese and French scientists reveal that the mass of the Milky Way is lighter than previously measured: between 5 and 800 billion solar masses

According to the website of the National Astronomical Observatory, the total mass of the Milky Way is a basic parameter of astrophysics and is directly related to many important astrophysical problems. Recently, an international team led by associate researcher Wang Jianling of the National Astronomical Observatory, in cooperation with the Paris Observatory Francois Hammer and Dr. Yang Yanbin, used the latest Gaia satellite observation data, combined with a new generation of dynamic modeling methods, to deduce the masses of baryonic matter and dark matter in the Milky Way. distributed. They found the Milky Way to be between 5 and 800 billion solar masses, suggesting that the Milky Way is lighter than previously measured . The results were recently published in the international journal Royal Monthly.

According to reports, due to the importance of the mass of the Milky Way, in the past few decades, scientists have been trying to accurately measure the mass of the Milky Way and its distribution. However, the results of previous studies are limited in many ways. First, due to the small observational sample data, the uncertainty of the research results is relatively large. Secondly, due to the lack of high-quality 6-dimensional phase space coordinates, we have to use simple assumptions to deduce the mass of the Milky Way, which leads to a large systematic error. In recent years, large-scale spectral surveys and the latest dynamic information released by the Gaia satellite have provided a large amount of high-quality celestial data of the Milky Way. Now is the golden age to study the structure, formation and evolution of the Milky Way. The first task before astronomers is how to use these high-quality data to study the structure and formation of the Milky Way. Dynamical modeling is one of the main tools for studying the structure of the Milky Way.

An international team composed of Dr. Wang Jianling of the National Astronomical Observatory and researchers Francois Hammer and Yang Yanbin of the Paris Observatory, France, used a new generation of dynamic modeling methods to model the dynamics of the Milky Way, and deduced the mass distribution of baryonic matter and dark matter in the Milky Way. They calculated the kinematics of 150 globular clusters in the Milky Way using the high-precision proper motion information of the Gaia satellite. Using the Markov Chain Monte Carlo method (MCMC) to combine the rotation curves on the disk with information on the dynamics of the globular cluster. They adopted the method based on the action distribution function to model the dynamics of the Milky Way, overcoming a large number of previous assumptions, so as to obtain a more realistic distribution function of globular clusters and the distribution of matter in the Milky Way. They also used N-body numerical simulations to study the possible effects of the Large Magellanic Cloud passing through the Milky Way for the first time. As well as the use of real cosmological hydrodynamic simulation data to study the influence of a large number of unrelaxed substructures on the measurement results.

They found that the total mass of the Milky Way is in the range of 5 to 800 billion solar masses, suggesting that our galaxy is lighter than previously thought. This light-mass galaxy has implications for many astrophysical problems , such as the origin of dwarf galaxies in the Milky Way, and the problem of lost satellite galaxies in cosmology.

Chinese and French scientists reveal that the mass of the Milky Way is lighter than previously measured: between 5 and 800 billion solar masses

▲ Comparing the rotation curves of the Milky Way, the red dotted line is the measurement of the rotation curve of the Milky Way by Wang et al. (2022), and the black and pink dotted lines are the rotation curves contributed by dark matter and heavy matter | Source: National Astronomical Observatory website

Colorful announced the launch of three new GeForce RTX 3080 12G graphics cards on January 12, with overclocked versions available, priced from 9299 to 9999 yuan. This series of graphics cards has 8960 CUDA cores, equipped with 12GB GDDR6X video memory , and the performance has been slightly improved compared to the RTX 3080. The default acceleration frequency of the graphics card is 1710MHz, both of which are LHR-limited mining computing power versions, which are already on sale.

iGame GeForce RTX 3080 Ultra W OC 12G LHR

Colorful launches three RTX 3080 12G graphics cards: 9299-9999 yuan

The graphics card follows the same series of white and gradient colors. It is equipped with two 90mm + one 80mm fans, and the radiator has 7 built-in heat pipes, which are soldered with reflow soldering process and fins. This graphics card is priced at 9699 yuan.

The graphics card is equipped with a 3×8pin power supply interface and supports one-key overclocking function, which can increase the frequency to 1740MHz.

Colorful launches three RTX 3080 12G graphics cards: 9299-9999 yuan

Colorful launches three RTX 3080 12G graphics cards: 9299-9999 yuanJD.comColorful iGame GeForce RTX 3080 Ultra W OC 12G LHR9699 yuandirect link

Tomahawk GeForce RTX 3080 12G Deluxe Edition LHR

Colorful launches three RTX 3080 12G graphics cards: 9299-9999 yuan

The product is equipped with three 90mm fans and uses a simple red and black casing. The graphics card radiator has 6 built-in 6mm heat pipes, and the height of the end radiator is longer than that of the PCB, which provides better heat dissipation. This graphics card provides a 2×8pin power supply interface with a core frequency of 1260MHz-1710MHz. This graphics card is priced at 9299 yuan.

Colorful launches three RTX 3080 12G graphics cards: 9299-9999 yuanJD.comColorful Tomahawk GeForce RTX 3080 Deluxe LHR 12G9299 yuandirect link

iGame GeForce RTX 3080 Advanced OC 12G LHR

Colorful launches three RTX 3080 12G graphics cards: 9299-9999 yuan

The flagship product released this time belongs to the iGame series. The graphics card has the iconic “big red circle” fan and uses a silver-black casing. The product is equipped with a 3×8pin power supply interface, supports one-key overclocking function, and the GPU frequency can be increased up to 1770MHz.

Colorful launches three RTX 3080 12G graphics cards: 9299-9999 yuan

Colorful launches three RTX 3080 12G graphics cards: 9299-9999 yuan

The product adopts the “Wind Catcher” fan blade developed by Colorful to achieve the increase of air intake and wind pressure. In addition, there is a vacuum VC soaking plate inside the radiator to improve heat dissipation efficiency; the PCB circuit adopts silver plating technology to improve stability and reduce current loss.

Colorful launches three RTX 3080 12G graphics cards: 9299-9999 yuan

Colorful launches three RTX 3080 12G graphics cards: 9299-9999 yuan

Colorful launches three RTX 3080 12G graphics cards: 9299-9999 yuan

Colorful launches three RTX 3080 12G graphics cards: 9299-9999 yuan

Colorful launches three RTX 3080 12G graphics cards: 9299-9999 yuanJD.comColorful iGame GeForce RTX 3080 Advanced OC 12G LHR9999 yuandirect link

New on January 13 has it that the latest data from the Sensor Tower store intelligence platform shows that the revenue and downloads of Chinese mobile game products in overseas markets in December 2021.

According to statistics, the overseas revenue of Mihayou’s “Yuan Shen” mobile terminal exceeded 96 million US dollars , ranking first in the overseas mobile game revenue list.

The 11th season of “Call of Duty Mobile Games” was launched, and the current revenue increased by 15.4% month-on-month , returning to the top three in the revenue list. The total overseas revenue has exceeded 1.3 billion US dollars .

The list of Chinese mobile games that have successfully gone overseas in December 2021 announced: “Genshin Impact” topped the list, with revenue exceeding million

In terms of revenue growth, “Call of Duty Mobile Games” has the highest growth rate , and the English version of “High-level Figure Fantasy” has increased by more than US$5 million in 12 months after its launch in Europe and the United States, ranking third on the growth list.

The list of Chinese mobile games that have successfully gone overseas in December 2021 announced: “Genshin Impact” topped the list, with revenue exceeding million

Happymod learned that in terms of downloads, Tencent’s “PUBG Mobile” ranked first with nearly 12 million downloads . Adaric Music’s mobile music game “Piano Fire” surged to 10 million downloads, landing at No. 2 on the chart.

The list of Chinese mobile games that have successfully gone overseas in December 2021 announced: “Genshin Impact” topped the list, with revenue exceeding million

Today, the Xiaomi App Store announced the optimization measures for package transfer on the developer site , removing the limitation of 32-bit package body transfer , and developers can independently decide the type of APK to upload according to their actual situation .

The Xiaomi App Store has announced the removal of the 32-bit package upload restriction, and developers can independently decide on the type of APK to upload

However, it is officially recommended to upload 32-bit and 64-bit dual packages to improve the user experience. At the same time, Xiaomi App Store redesigned the overall UI and UE of the package, with a clearer structure and reduced cognitive costs.

In addition, the Xiaomi App Store has also upgraded the privacy detection service to help developers with privacy issues by providing privacy detection reports. The rectification guidance includes providing problem descriptions, rectification suggestions and self-inspection methods for problematic items, as well as self-inspection methods and rectification suggestions for undetected items.

IT House learned that the Xiaomi Mi 12 and 12 Pro are equipped with a new generation of Snapdragon 8 processors. This processor uses Samsung’s 4nm process and the new Armv9 instruction set. The Armv9 instruction set is the first major update to the instruction set since Arm released the Armv8 instruction set in 2011. At the same time, the Snapdragon 8 Gen 1 only supports three Cortex-A710 cores to run 32-bit applications.

The Xiaomi App Store has announced the removal of the 32-bit package upload restriction, and developers can independently decide on the type of APK to upload

Zhang Guoquan, director of Xiaomi’s mobile phone system software department, said on January 7 that the parallel release of Xiaomi 12 Pro series Android S + ArmV9, especially the 64-bit compatibility, has brought a lot of pressure to the application adaptation of the Android ecosystem and affected the three-party App freeze. Flashback and power consumption.

According to foreign media tomshardware news, the running score of Intel’s 12th-generation Alder Lake entry-level processor Celeron G6900 appeared on the Geekbench 5 website.

This processor uses Golden Cove core, dual-core dual-thread, L2 cache 1.25MB, L3 cache 4.0MB. The processor does not support the turbo function, and the main frequency only fluctuates around 3.5GHz , but it is installed on the ASRock Z690M Phantom Gaming 4 motherboard and can be overclocked to 4.5GHz by relying on the BFB function .

Intel Celeron G6900 dual-core processor running score exposure: single-core performance is the same as i9-10900K

In terms of performance, the Celeron G6900 scored 1397 points for single-core and 2565 points for multi-core , of which the single-core performance was on the same level as the previous i9-10900K and lower than the AMD R7 5800X.

Happymod learned that the official price of this processor is $42 (about 267.54 yuan), but the retailer’s price is $59.99 (about 382.14 yuan).

But in the other news we earlier reported here on Happymod, Online news reported on January 13 that the latest masterpiece of Capcom’s “Monster Hunter” series “Monster Hunter: Rise” was officially unlocked and sold on the Steam platform today. The standard version in the country is 396 yuan, and the deluxe version is 465.3 yuan. Players who have pre-ordered have also Appearance equipment such as Hound and Elu cat can be obtained for free.

The game’s large-scale DLC “Dawn” will be released this summer, and the official will announce more related news in the spring. The Steam version of “Monster Hunter: Rise” will be able to play all the additional content released on the NS version at launch, including the upcoming update of “Sonic” linkage content, in addition to the content released in the end of February 2022 with the Switch version.

“Monster Hunter: Rise” this time on the PC platform, will add a series of special filters , including black and white, nostalgia, Japanese style, Sengoku (Japan) style and two movie styles. The game will support ultra-wide monitors with support for 4K resolutions, HD textures, high frame rate modes, keyboard and mouse operations, and voice chat.

As of press time, the Steam evaluation of this work is “mostly favorable”, and 77% of players have given this work a favorable review .

We learned that “Monster Hunter: Rise” was the first to be released exclusively on the Nintendo Switch platform on March 26, 2021, and its global sales exceeded 5 million in 10 days.

In the other news, IT House reported on January 13 that WeChat yesterday released the “Announcement on Governing Disorders in the Operation of Internet User Accounts”. Further standardize the operation of Internet user accounts.

WeChat manages the chaos in the operation of Internet user accounts

The announcement pointed out that during the special work period, the WeChat platform continued to strengthen the management of illegal account name information , comprehensively standardize the use of account name information, and counterfeit the names of organizations such as party, government and military organs, enterprises and institutions, news media, etc. The identified accounts were dealt with strictly, and a number of accounts that were used without authorization and were associated with administrative divisions were cleaned up , using the banners of “XX Toutiao”, “XX Think Tank” and “XX News” to mislead the public with falsehoods , such as “Nanjing Toutiao” ” Handan News”, “China and Globalization Think Tank”, “College Entrance Examination Shandong”.

We learned that WeChat stated in the announcement that the WeChat platform has always attached great importance to and proactively dealt with accounts and content that use malicious marketing and other means to harvest traffic and gain attention. In this special action, the WeChat platform continued to increase governance. , Strictly deal with illegal accounts that use current affairs and social events to rub off on hot spots, and use the headline party to hype up illegal accounts.

According to reports, the WeChat platform will continue to optimize the management mechanism, continue to clean up all kinds of illegal accounts and content, and guide account entities to standardize account operations .

WeChat manages the chaos in the operation of Internet user accounts

In other news, the realme GT2 Pro was officially released recently. It adopts Samsung 2K flexible straight screen / E4 / 120Hz / LTPO 2.0, and is adapted to the high frame rate mode of multiple games.

realme GT2 Pro will be updated to support dynamic LTPO variable frame display function, and

We learned that today, realme officially released the answer to the question:

1. Has LTPO stepless frame change been updated?

In the current software version, the second-generation LTPO function is already supported and effective. The frame rate display of the system is currently only the maximum frame rate of the software, and the dynamic LTPO variable frame display function will be brought to you in the next update .

2. Will it be updated to support more high frame rate games?

At present, Realme GT2 Pro already supports the high frame rate mode of “Honor of Kings” and “QQ Speed ​​Mobile Games”. “Peace Elite” 90 frames will be supported after the next game version update , and Realme GT2 Pro is also in the second batch of compatible models in the “League of Legends Mobile Games” high frame rate mode.

3. Why does the game have a high frame rate or 60 frames?

In order to provide a more balanced performance experience, realme has specially customized an exclusive GT mode in the GT series products, allowing players to release the full chip performance with one click and obtain a more extreme gaming experience. At present, users who want to experience high frame rate games are recommended to open the GT mode to play the game . If the GT mode is not turned on, the maximum frame rate of the game will be limited by the system, which can achieve lower heat generation and longer game time.

4. When does 1000Hz touch take effect?

1000Hz Instantaneous Touch is optimized for scenarios where games require extremely fast response operations. Currently, it is automatically enabled in the following game scenarios:

  • When there are more than 4 people on the same screen in the team battle of “Honor of Kings”;

  • “Peace Elite” users turn on the magnifying mirror until the end of the mirror opening;

  • “League of Legends Mobile Games” in game games other than training camp;

  • The countdown time for the departure of “QQ Speed ​​Mobile Games”.

At the same time, Realme GT2 Pro also supports the latest O-Sync overclocking response 2.0, which can be opened in the sidebar of the game interface, which can effectively improve the speed of touch response. League of Legends Mobile Games”, “QQ Speed ​​Mobile Games” and many other mainstream games.

5. Where has the game space gone?

In the newly upgraded realme Ul3.0, the game space and the game center are merged . At the same time, users can also switch and set game functions in the sidebar of the game.

realme GT2 Pro will be updated to support dynamic LTPO variable frame display function, and

We earlier reported that Google launched the first beta version of Android 12L in December last year, bringing several optimizations and improvements to foldable devices and large-screen devices, and has released updates to many Pixel phones. .

Android 12L Beta 2 released: API finalized, oriented to folding screen, tablet, can start to adapt to App (with update package)

Today, Android 12L released the Beta 2 version . There are not many functional changes in this update, mainly for bug fixes and with the latest January 2022 security patch.

Android 12L Beta 2 released: API finalized, oriented to folding screen, tablet, can start to adapt to App (with update package)

We understands that starting with Beta 2, system behavior and APIs have been finalized . Developers can already adapt apps for Android 12L. Android 12L has a standard API level (API level 32).

  • Fixed an issue where the clock on the lock screen was not in the center of the screen.

  • Fixed an issue where all apps in the recent apps view were displayed as a black image with an “App unavailable” message.

  • Fixed using gestures to switch between apps, sometimes showing the image of the previous app state on part of the current app.

  • Fixed an issue where some icons on the lock screen were too small when viewed on a large screen.

  • Fixed an issue where sometimes the lock screen was not turned off after unlocking the device.

  • Fixed an issue that caused bitmap images to disappear or otherwise render incorrectly in widgets.

Android 12L Beta 2 has been pushed to a number of Pixel devices.

By koka

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