Tech & Science Is This Huge Object A Failed Star Or A Giant Planet?

18:51  08 november  2017
18:51  08 november  2017 Source:   International Business Times

Monster planet found orbiting dwarf star: 'surprised' astronomers

  Monster planet found orbiting dwarf star: 'surprised' astronomers A "monster" planet, which should in theory not exist, has been discovered orbiting a faint dwarf star far, far away, surprised astronomers said Tuesday. The existence of the gassy giant challenges long-standing theories that such a big planet -- about the size of Jupiter -- cannot be formed around a star so small.The star has a radius and mass about half that of the sun.Theory had predicted that small stars can form rocky planets, "but do not gather enough material together to form Jupiter-sized planets," Britain's Royal Astronomical Society said in a statement.

Extrasolar Planets , Hubble. Giant Planet or Failed Star ? Article written: 7 Sep , 2006 Updated: 24 Mar , 2012. “New, more sensitive telescopes are finding smaller and smaller objects of planetary -mass size,” said Luhman.

And joining the long list is OGLE-2016-BLG-1190Lb, a planetary object so massive the team behind its discovery isn’t even sure if it is a gigantic planet or a failed star .

The Milky Way seen arching across the Chilean night sky above the European Southern Observatory's Paranal Observatory.© Provided by IBT US The Milky Way seen arching across the Chilean night sky above the European Southern Observatory's Paranal Observatory. There are a lot of things in the universe that routinely stump scientists trying to understand how everything in it works. And joining the long list is OGLE-2016-BLG-1190Lb, a planetary object so massive the team behind its discovery isn’t even sure if it is a gigantic planet or a failed star.

A large international team of researchers found the planet when looking at data acquired by NASA’s Spitzer Space Telescope in June-July 2016, when the telescope was looking at a recently discovered microlensing event called OGLE-2016-BLG-1190. The event itself was spotted by the Optical Gravitational Lensing Experiment (OGLE) collaboration, a Polish astronomical project based at the University of Warsaw which utilizes the 1.3 meter Warsaw telescope mounted at the Las Campanas observatory in Chile.

Monster planet found orbiting dwarf star: 'surprised' astronomers

  Monster planet found orbiting dwarf star: 'surprised' astronomers A "monster" planet, which should in theory not exist, has been discovered orbiting a faint dwarf star far, far away, surprised astronomers said Tuesday. The existence of the gassy giant challenges long-standing theories that such a big planet -- about the size of Jupiter -- cannot be formed around a star so small.The star has a radius and mass about half that of the sun.

The black hole at the center of galaxy NGC 4845 is seen snacking on a giant gas planet or " failed star " in this screenshot from an ESA say was either a huge Jupiter-like planet wandering freely through space or a brown dwarf, a strange object that's larger than a planet yet still too small to

The object , named ROXs 42Bb, could be a planet or it could be a failed star – known as a brown dwarf. Another theory, however, suggests gas giants form through disk instability, where a fragment of a disk surrounding a young star collapses under its own gravity and forms a planet .

Microlensing is a kind of gravitational lensing technique, in which a large object — like a star or a galaxy — in the foreground bends the light coming from an object in the background, so that the background object, otherwise invisible, can be seen by an observer in front. And if a dark object, like a planet, passes across the bent light from the background object, the dark object can be observed too. The planetary object (to be referred to as a planet in the remainder of this article) researchers found using this method is located in the center of the Milky Way.

“We report the discovery of OGLE-2016-BLG-1190Lb, which is likely to be the first Spitzer microlensing planet in the Galactic bulge/bar, an assignation that can be confirmed by two epochs of high-resolution imaging of the combined source-lens baseline object,” the researchers, led by Yoon-Hyun Ryu of the Korea Astronomy and Space Science Institute in Daejon, South Korea, wrote in the paper’s abstract.

Monster planet found orbiting dwarf star: 'surprised' astronomers

  Monster planet found orbiting dwarf star: 'surprised' astronomers A "monster" planet, which should in theory not exist, has been discovered orbiting a faint dwarf star far, far away, surprised astronomers said Tuesday. The existence of the gassy giant challenges long-standing theories that such a big planet -- about the size of Jupiter -- cannot be formed around a star so small.The star has a radius and mass about half that of the sun.Theory had predicted that small stars can form rocky planets, "but do not gather enough material together to form Jupiter-sized planets," Britain's Royal Astronomical Society said in a statement.

But for getting the very basic concept across of going from a gas giant planet to a star , calling Jupiter a " failed star " can be a useful analogy. Can a “solar system”-type system exist without a star or a stellar remnant? 0. Can a Jupiter sized object be replaced with Venus?

Contrary to what some people may say, Jupiter is not a failed star . It is a gas giant planet , a type of The point here is that stars are massive objects . While Jupiter may rightfully seem like a huge planet , it is still puny compared to even the smallest M-dwarfs like Barnard’s Star or Proxima Centauri.

The planet itself has a mass equivalent to about 13.4 times that of Jupiter, and it orbits its host star approximately every 3 years at a distance of 2 AU (one astronomical unit is the distance between the sun and Earth, roughly 150 million kilometers or 92 million miles). The star, OGLE-2016-BLG-1190L, is a G dwarf with only about 0.89 solar masses, or less than a tenth of the sun.

The mass of the planet places it almost exactly at the conventional boundary that separates planets from brown dwarfs, and this is why scientists cannot determine whether it is, in fact, a planet that was born out of the disk around its host star or if it is a low-mass failed star. Further observations may answer the question in the future, the researchers said.

Milky Way’s bulge refers to the region in the center of the spiral galaxy, where it is much wider than it is along its numerous arms. This region is very densely packed with stars which make it difficult to study using conventional methods of observation.

The paper, titled “OGLE-2016-BLG-1190Lb: First Spitzer Bulge Planet Lies Near the Planet/Brown-Dwarf Boundary,” is currently available on the preprint server arXiv and has been submitted to the Astronomical Journal for publication.

Bizarre Lava-Covered Planet's Air Could Support Life .
But don't book your tickets yet—this place is definitely too hot to handle.That distant planet, known as 55 Cancri e, has been entrancing scientists since they first spotted it in 2004. It's skewed with respect to its star, its core may be basically a giant diamond, and its surface is covered in lava. It's pretty hard to turn away from a combination like that.

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