Monday , November 29 2021

Astronomers have super-earth detected on a very dense star



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The closest known massive explosion of the earth type.

Astronomers have discovered a planet that has more than three times the weight of the earth in # 39; Barnardster knew. It is the closest single star, the second closest to the three-star Alfa AB-Proxima Centauri). And historically the first, it's the existence of a planet in the modern world.

The planet's super-core strategy is, however, in the Barnard Star system as a so-called fast. That is, at a distance of & # 39; the star of & # 39; the father, where water freezes and other loose substance. This seems to be an ice world. Unlucky for life if we know it.

Rural area (below). Polarizers give 2, 4 and 6 light years. The top left is Barnard's star, right Alfa AB-Proxima Centauri.

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Rural area (below). Polarizers give 2, 4 and 6 light years. The top left is Barnard's star, right Alfa AB-Proxima Centauri.

Source: IEEC / Science Wave, Guillem Ramisa

Two thirds years …

A planet with 3.2 pounds of earth, called Barnard's Star b (GJ 699 b), runs the star once in 233 days, for about two thirds of the earth's year. At a distance of 0.4 miles from Earth-Sun, or 60 million miles, a little further than Mercury Sun.

It looks close. But Barnard's star is not the sun. This is the so-called red dwarf. So small (0.15-0.20 sulfur radius), relatively cold (3100 K) and low-mass star (0.14 mass). The result is low luminosity (0.004 sunlight).

Compare the size of Sun (upper left) and Barnard's star (top left). Below is the area of ​​circular distances in AU (Earth-Sun distances), the planets are in scale.

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Compare the size of Sun (upper left) and Barnard's star (top left). Below is the area of ​​circular distances in AU (Earth-Sun distances), the planets are in scale.

Source: Nature

… in low light and deep below zero

On planet b, at its current distance, there are only 2 percent of a large amount of energy that the earth receives from the & # 39; the sun. This corresponds to a typical surface temperature of minus 170 degrees Celsius. Nets on & # 39; Months of & nbsp; the gigantic planets of the solar system.

The Barnard star is not much larger than Jupiter, its radius is only 1.5 – to 2 times larger. However, it has more than 150 times the weight. She is almost twice as old as the sun. There are breakthroughs, though weaker than other red beads.

Heavenly Sprinter

It offers the speed of so-called own motion, which is the level of shift in the sky to other stars. In background, it's really a really spacious speed, but especially from & # 39; the neighborhood for us. The speed of Barnard's Sun on the sun is 500,000 kilometers per hour, so in & nbsp; Heaven annually 180 hours by the distance of the Mediterranean Moon.

This is at the highest known value of ##; the star. This invisible star deep underneath the threshold of visibility with the blue eye has special Barnard's Arrow, according to American astronomer Edward Barnard, in 1916 measured his record movement.

Articial vision of the surface of the planet Barnard Star b.

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Articial vision of the surface of the planet Barnard Star b.

Source: ESO / M. Kornmesser

More and more, in the 1960s and 1970s, was made much of their observations made by the Dutch-American astronomer Peter van de Kamp. It was announced to him that one or more of the giant giant planets lived there. His requests, however, are not proven.

Support the theory

However, the discovery has not surprised the scientists. On one side are super-earthen (planets that quench more than one weighing and weighing us) are the most common exposures that appear in Barnard's light stars. First, from the current theories of & # 39; The emergence of planets, planets of this kind, must be the easiest to make on the called snelline.

The search for Barnard's planets in the past 50 years is, however, unsatisfactory. The current result is the result of efforts of a 63-member international astronomer team who have concentrated data of a large binoculars series.

The sky in the constellation Hadonosa (Ophiuchus) round the Barnard Star. When you shoot, you will see three different discs, read, yellow, and blue, corresponding to the views of Barnard stars for a while after the next exhibitions. It has the largest known own movement.

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The sky in the constellation Hadonosa (Ophiuchus) round the Barnard Star. When you shoot, you will see three different discs, read, yellow, and blue, corresponding to the views of Barnard stars for a while after the next exhibitions. It has the largest known own movement.

Source: ESO / Digitized Sky Survey, Davide Martin, E – Red Points

Cross check

"After a great deal of analysis, we are sure that 99 percent is a planet. We have rated seven instruments that measure 20 years, one of the most comprehensive data for This method of finding exponentials, "said team leader Ignasi Ribas of the Catalan cosmology institute in Barcelona, ​​Spain.

"We combine the archived data of other teams with new, overlapping Barnard stars from different observatories. It was just the combination of instruments that was important to us, to check it's quality" adds Guillem's teammaat Anglada Escudé fan & # 39; Queen's University in London (UK).

An artistic representation of how the light of mother's room is the atmosphere of # 39; the terrestrial type exposes light.

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Earth of red dwarves

The second, two years ago, one of them discovered a planet of an apparently terrestrial type (exact paragraphs have not yet been confirmed) in the nearest star, Proxima Centauri, members of # 39; and initially called three stars in Kentaur's constitution. Even Proxima is a red dwarf.

The study was published by Science magazine Nature. Posts were made by the European Southern Observatory (ESO) in Chile, the Keck Observatory in Hawaii, and the Spanish National Research Council (CSIC), which provided equipment and staff an important contribution to the discovery.

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