Brahmand NewsPrevious Article
Brahmand NewsNext Article
Headlines
  • Air chief Bhadauria flies sortie in HAL's trainer aircraft:-Air Chief Marshal R K S Bhadauria on Thursday undertook a sortie in the basic trainer aircraft HTT-40 here, thereby becoming the first serving Chief of Air Staff to fly in the Hindustan Aeronautics Limited developed aircraft at the prototype stage....
  • Screening process for selection of crew for Gaganyaan being done professionally: IAF chief:-Chief of Air Staff, Air Chief Marshal R K S Bhadauria, has said the screening process for the selection of crew for ISRO's proposed humanspace flight programme-Gaganyaan-is being done professionally. ...
  • Centre inks pact with Goa Shipyard for two missile frigates:-The Centre has signed a contract with the Goa Shipyard Limited (GSL) for construction of two advanced missile frigates for the Navy, Union Minister of State for Defence Shripad Naik has said....
  • India, US begin first tri-services exercise:-In reflection of growing congruence in bilateral defence ties, armed forces of India and the US on Wednesday began their first tri-services exercise on the Eastern seaboard. The nine-day humanitarian assistance and disaster relief (HADR) exercise code-named 'Tiger Triumph' is aimed at developing inter-operability between the militaries of the two countries in HADR operations....

First exoplanet Kepler spotted finally confirmed

Line Spacing+- AFont Size+- Print This Article

A file photo.

WASHINGTON (PTI): Ten years after it was launched, the first exoplanet candidate spotted by NASA's Kepler space telescope has finally been confirmed as a real world, scientists say.

The exoplanet known as Kepler-1658 b is a massive hot Jupiter that whips around its star every 3.85 days, said researchers from the University of Hawaii in the US.

From the surface, the star would appear 60 times larger in diameter than the Sun as seen from Earth, they said.

Kepler has discovered thousands of exoplanets since its launch in 2009, using the transit method -- small dips in a star's brightness as planets cross in front of the star.

Because other phenomena can mimic transits, Kepler data reveal planet candidates, but further analysis is required to confirm them as genuine planets, according to the study published in the Astronomical Journal.

Despite being the very first planet candidate discovered by Kepler in 2011, Kepler-1658 b had a rocky road to confirmation.

The initial estimate of the size of the planet's host star was incorrect, so the sizes of both the star and Kepler-1658 b were vastly underestimated, researchers said.

It was later set aside as a false positive when the numbers did not quite make sense for the effects seen on its star for a body of that size, they said.

"Our new analysis, which uses stellar sound waves observed in the Kepler data to characterise the host star, demonstrated that the star is in fact three times larger than previously thought," said University of Hawaii graduate student Ashley Chontos.

"This in turn means that the planet is three times larger, revealing that Kepler-1658 b is actually a hot Jupiter-like planet," Chontos said in a statement.

With this refined analysis, everything pointed to the object truly being a planet, but confirmation from new observations was still needed.

Kepler-1658 is 50 per cent more massive and three times larger than the Sun, the researchers said.

The newly confirmed planet orbits at a distance of only twice the star's diameter, making it one of the closest -- in planets around a more evolved star -- one that resembles a future version of our Sun.

Standing on the planet, the star would appear 60 times larger in diameter than the Sun as seen from Earth, the researchers said.

Planets orbiting evolved stars similar to Kepler-1658 are rare, and the reason for this absence is poorly understood, they said.

The extreme nature of the Kepler-1658 system allows astronomers to place new constraints on the complex physical interactions that can cause planets to spiral into their host stars.

The insights gained from Kepler-1658b suggest that this process happens slower than previously thought, and therefore may not be the primary reason for the lack of planets around more evolved stars.

Tags:

Exoplanet  Kepler  
Line Spacing+- AFont Size+- Print Article

Other Related News

Dark matter and exoplanet discoveries win Nobel Physics Prize

Canadian-American cosmologist James Peebles and Swiss astronomers Michel Mayor and Didier Queloz have won the Nobel Physics Prize for research that increases the understanding of our place in the Universe.

Upcoming Defence Exhibitions

BRAHMOS Missile Systems

Headlines

Brahmand World Defence Update 2019

Image Gallery