Galactic Death – Some galaxies hit the gas, live quickly and die young

Do you think the universe is busy now? Why, to this day, it is flooded with positive activity.

if so Activity you mean Working with children, And in Babies You mean baby Stars.

When Cosmos was 2 and 4 billion years old, the galaxies were rapidly changing into galaxies, almost 100 times as simple as we are today in the 13.8 billion-year-old universe. . Because light takes time to reach them, we see that these galaxies are 9-12 billion or so years younger than us, and that almost every adult we see at that distance is a proud parent with many stars. This was a time of great star formation in the universe, and astronomers actually call it “Space Lunch.”

But – and this is great – in that distance large galaxies will be the light that creates many stars. People with low birth weight are very difficult to see, so we may be suffering from “A” Discrimination, Or a Election results. Those weak galaxies may be there, but we cannot see them.

So how do astronomers view them out there?

A new study has examined six such galaxies Gravity glasses Enhances their light. These galaxies are relatively rare and difficult to see, so finding lenses is very helpful.

Coincidentally, for each of these galaxies, there is a large collection of galaxies between us and us. The gravitational pull of these clusters destroys the space around them, and the light from distant galaxies can increase, increase, and distort in space. Amazingly, I have written about this many times in this new work, including one of the galaxies! The galaxy behind the massive galaxy cluster MACSJ0138.0-2155 MRG-M013816 stations, and the light is distorted to many dots and arches. When that happened, I wrote about a cluster and a galaxy, since a star exploded in the galaxy and allowed astronomers to observe that supernova. In those articles I describe everything about glasses, so I strongly recommend that you look at them.

The six galaxies were chosen for this study because they did not produce many stars. All six are relatively large, hundreds of billions of stars or more (like the Milky Way), but they are also weak inside, and we can easily see them because their light is through the lens.

Astronomers observed the Alma, which distinguishes light from the longest wavelengths we see, using the Atakama large millimeter / sub-millimeter array. This type of light is emitted by dust in galaxies, and when it does, the amount of dust is measured in proportion to the amount of cold gas (in general, there is about 100 times cooler gas than dust). So you measure the brightness of the dust and measure how much dust there is, and use it to see how much cold gas there is and that gas is the fuel needed to make the stars.

Scientists have discovered that these galaxies are severely depleted in dust and therefore can distinguish only two galaxies in gas. at all (Including our old friend MRG-M103816), and even those who are very tired. For the other four, they can only have a higher range of brightness, which means that the galaxies would be brighter if they were even brighter.

When you measure this to the amount of gas, these galaxies have only a small fraction of the expected amount of cooled gas, as is the case for standard galaxies at that distance. In other galaxies, the amount of cold gas is about half the total number of stars, but much less. The maximum was less than 5%, and the other was less than 1%.

These galaxies are not heavy. What happened to them?

Not clear. In many galaxies, like us, gas will spend billions of years later, but for these galaxies it seems that their gas is gone after only one billion years. And the gas is there and it doesn’t seem to be used to make stars. It’s just Not there.

There are ways to lose gas. One is to move fast in space and let the gas out. That usually takes a long time. Another is if the central giant black hole in each giant galaxy is actively feeding. Materials fall in and overheat, and this creates powerful sub-particles that can breathe the gas, or it heats up enough heat that this survey does not see (because only cold gas follows). It is not clear what kind of malpractice there is in these cases, but Something He destroyed these galaxies.

If all this were true, the future prospects of these galaxies would be dark – if there were no gas to make new stars, all the stars would have died and the galaxy would have become dark. Basically, they die. True, this might be the fate of every galaxy, but it is not yet billions of years old. It is close to these few.

I note that the following assumptions may be missing. For example, perhaps the brightness of the dust at this distance does not reflect the amount of cooled gas in the way we think (astronomers note that the temperature of the dust plays a role here, so if the dust is warm the apple data is not considered and show it).

If we want to understand how galaxies have evolved from birth to the present day, these questions must be answered, and that is an astonishing question that astronomers really want to answer. The galaxies are one of the basic structures in the universe, and these observations show that we are still trying to identify them.

But cool, that’s science. We are still a little new to such observations, and if we had all the answers, there would be no discoveries.

And what is that fun? Happiness is in secret, and the process of unraveling it. We are there now, and in fact, it is a good place to live.

.

Leave a Comment