Sunday , May 22 2022

Finally, a planet for the star of Barnard | space



[ad_1]

<! –

->

The star of Barnard – the closest star to Earth – has a huge movement on the dome of the sky. This image – with the One-Minute Astronomer – shows the movement from 1991 to 2007. Now, it is known that this very close star has a planet.

Astronomers have discovered thousands of outer planets in recent years – a planet Earth in orbit that is even the closest star to the sun – Proxima Centauri. Today (November 14, 2018), another exciting find is to declare a super-planet Earth circulating in Barnard's Star, just six light-years in orbit, with the nearest single star (and the closest second star system) in orbit.

Planet tagged Barnard's Star b (GJ 699 b). His discovery has been dozens of years!

Indeed, Barnard's Star was one of the first to be said to have an orbital planet from the beginning of the 1960s until the beginning of the 1970s. The astronomer Peter van de Kamp argued that the star saw ğ trembling daha in the movement of the star in the sky and pointed to one or more planets that attracted the star. He apparently made mistakes with appearing spatial changes that were caused by adjustments in the telescope lens, but it was also based on the mystery of Barnard's Star.

2019 month calendar here! Order before you go. Makes a great gift.

This mystery and its proximity to the world should encourage an international astronomical team to work hard to find a planet for the Star of Barnard. The team, including astronomers at the European Southern Observatory (ESO), Carnegie Science, and other places, announced the discovery in a peer-reviewed journal. Nature.

Astronomers found the planet in the same way as van de Kamp, a radial velocity method used in the 1960s and 70s and supported by modern computers, as well as devices with much greater power and precision. Barnard's Star's new planet has been combined to create an extremely large database of 20 years of combined data from various telescopes. According to Ignasi Ribas, the lead author of the Institute of Space Research at Catalonia, Spain:

Using observations from seven different instruments, we made 20-year measurements and made it one of the largest and most comprehensive data sets used for precise radial velocity studies. The combination of all data resulted in a total of 771 measurements – a huge amount of information!

And, in fact, Barnard's Star b is the smallest and farthest planet ever found using the star's radial speed.

In the sun, Barnard's Star is among the closest neighbors among the stars. Image with NASA PhotoJournal.

The radial velocity technique is based on the fact that the gravity of a planet causes tiny wobbles in its orbit. This technique can affect not only the orbital planets of gravity, but also the stars of the planets.

According to Paul Butler in Carnegie:

This technique was used to find hundreds of planets. We now have archive data for decades. The accuracy of the new measurements continues to evolve and opens the doors to new space parameters like super planets in the coolest orbits like Barnard's Star b.

Astronomers are convinced that the planet is real and that there will be no false identification. Ignasi Ribas commented:

After a very careful analysis, we're over 99 per cent because we're sure the planet is there. However, to observe this fast-moving star, we will continue to ignore the impossible but unnatural variations of star-sheen that can mask like a planet.

Barnard's star is a red dwarf star. That is small; Our solar energy is the largest in our planet, the size of our sun and Jupiter. Image with Wikimedia Commons.

Barnard's Star B looks like a holistic World – a kind of outer planet that is larger than Earth but smaller than Uranus or Neptune. It has 3.2 times the mass of Earth and collects its star in orbit every 233 days. From this distance, because the star is smaller and cooler than the sun – it only radiates 0.4% of the radiant energy of our sun – the planet is colder than the Earth – estimated surface temperature -238 Fahrenheit (-150 degrees Celsius). This suggests that although little is known about certain conditions on the planet, it will not be habitable.

Guillem Anglada-Escudé of Queen Mary University in London, said:

In this breakthrough we have all worked hard. This discovery is the result of a great collaboration organized within the scope of the Red Dot project, which includes the contributions of teams from all over the world. Follow-up observations are already going on in different observatories around the world.

These astronomers also stated that NASA would be an ideal target for the upcoming Wide Field Infrared Observation Telescope (WFIRST), since the planet is close. It is also possible to observe Barnard's Star through the Gaia mission of the European Space Agency. This program won new and exciting information in astronomy, publishing the second data published earlier this year.

The artist's concept of the surface of the newly discovered planet, Barnard's Star b. Image with ESO / M. Is Kornmesser.

The artist's Barnard's Star concept b. Image with ESO / M. Is Kornmesser.

Six light-years away, Barnard's Star is the three-star Alpha Centauri triple star system that contains the Proxima Centauri, the closest star for our sun, but the closest star to the four-star star. It is a red dwarf star that produces some luminescence, but is less active in terms of star exacerbation activity than other known red dwarfs. Usually like the red dwarves, this star is smaller – and it is believed to be older – bigger than our sun.

Although it is the second closest star system, Barnard's Star is too vague to be seen by the human eye.

The Yerkes Observatory, which for the first time noticed the star in 1916 with a large movement or side-motion in the dome of the sky, was named after the astronomer EE Barnard. Barnard's great right-hand movement, in part, leads to the closeness of the star to Earth. But also with the fact that Barnard's Star & # 39; s – and his newly discovered planet – are only passing through our space neighborhood rather than moving around the center of the galaxy in the same general flow as our sun and other nearby stars. Over the long period of astronomical time, Barnard's Star will move away!

Barnard's Star b is a super world like Kepler-62f. This is an artist's concept. Image with NASA Ames / JPL-Caltech / T. Plow.

Bottom line: It's exciting that the super-Earth planet is so close to our solar system, even if it's not likely to be habitable. Actually very Such worlds have already been found and are now so close, meaning that they must probably be partners in the galaxy and increase the chances of some or their world-size cousins ​​to truly support life.

Source: Barnard dünyas Star is a super-earth planet candidate orbiting the snow line

Via ESO

Read more: The permanent mystic of the star of Barnard

Paul Scott Anderson

[ad_2]
Source link