Featured Research

from universities, journals, and other organizations

Habitable planet: New super-Earth in six-planet system may be just right to support life

Date:
November 8, 2012
Source:
University of Hertfordshire
Summary:
A new super-Earth planet that may have an Earth-like climate and be just right to support life has been discovered around a nearby star by an international team of astronomers.

This artist's impression shows HD40307g in the foreground (on the left hand side), with its host star HD40307 and two other planets in the system (on the right-hand side). The depicted atmosphere and continents are not detected or constrained by this work.
Credit: J. Pinfield, for the RoPACS network at the University of Hertfordshire

A new super-Earth planet that may have an Earth-like climate and be just right to support life has been discovered around a nearby star by an international team of astronomers, led by Mikko Tuomi, University of Hertfordshire, and Guillem Anglada-Escude, University of Goettingen.

The new super-Earth planet exists in the habitable zone of a nearby star and is part of a six-planet system. The system was previously thought to contain three planets in orbits too close to the star to support liquid water. By avoiding fake signals caused by stellar activity, the researchers have identified three new super-Earth planet candidates also in orbit.

Mikko Tuomi said: "We pioneered new data analysis techniques including the use of the wavelength as a filter to reduce the influence of activity on the signal from this star. This significantly increased our sensitivity and enabled us to reveal three new super-Earth planets around the star known as HD 40307, making it into a six-planet system."

Of the new planets, the one of greatest interest is the one with the outermost orbit from the star -- with a mass at least seven times of the Earth. Its orbit around the host star is at a similar distance to Earth's orbit around our Sun, so it receives a similar amount of energy from the star as the Earth receives from the Sun -- increasing the probability of it being habitable. This is where the presence of liquid water and stable atmospheres to support life is possible and, more importantly, the planet is likely to be rotating on its own axis as it orbits around the star creating a daytime and night-time effect on the planet which would be better at creating an Earth-like environment.

Guillem Angla-Escude said: "The star HD 40307, is a perfectly quiet old dwarf star, so there is no reason why such a planet could not sustain an Earth-like climate."

Hugh Jones, University of Hertfordshire, added: "The longer orbit of the new planet means that its climate and atmosphere may be just right to support life. Just as Goldilocks liked her porridge to be neither too hot nor too cold but just right, this planet or indeed any moons that it has lie in an orbit comparable to Earth, increasing the probability of it being habitable."

Earlier this year, the Kepler spacecraft found a planet with a similar orbit. However, Kepler 22d is located 600 light years from Earth, whereas this new super-Earth planet known as HD 40307g is much closer being located at 42 light years from Earth.

Mikko Tuomi carried out this work as a member of the European science network RoPACS (Rocky Planets Around Cool Stars) -- an initiative with a research focus on the search for planets around cool stars. RoPACS has pan-European membership and is led from the University of Hertfordshire by David Pinfield, who commented: "Discoveries like this are really exciting, and such systems will be natural targets for the next generation of large telescopes, both on the ground and in space."


Story Source:

The above story is based on materials provided by University of Hertfordshire. Note: Materials may be edited for content and length.


Journal Reference:

  1. Mikko Tuomi, Guillem Anglada-Escude, Enrico Gerlach, Hugh R. A. Jones, Ansgar Reiners, Eugenio J. Rivera, Steven S. Vogt and R. Paul Butler. Habitable-zone super-Earth candidate in a six-planet system around the K2.5V star HD 40307. Astronomy & Astrophysics, 2012; (accepted for publication) [link]

Cite This Page:

University of Hertfordshire. "Habitable planet: New super-Earth in six-planet system may be just right to support life." ScienceDaily. ScienceDaily, 8 November 2012. <www.sciencedaily.com/releases/2012/11/121108073927.htm>.
University of Hertfordshire. (2012, November 8). Habitable planet: New super-Earth in six-planet system may be just right to support life. ScienceDaily. Retrieved September 30, 2014 from www.sciencedaily.com/releases/2012/11/121108073927.htm
University of Hertfordshire. "Habitable planet: New super-Earth in six-planet system may be just right to support life." ScienceDaily. www.sciencedaily.com/releases/2012/11/121108073927.htm (accessed September 30, 2014).

Share This



More Space & Time News

Tuesday, September 30, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

French Apple Fans Discover the Apple Watch

French Apple Fans Discover the Apple Watch

AFP (Sep. 30, 2014) — Apple fans in France discover the latest toy, the Apple Watch. The watch comes in two sizes and an array of interchangeable, fashionable wrist straps. Duration: 00:42 Video provided by AFP
Powered by NewsLook.com
The Water You Drink Might Be Older Than The Sun

The Water You Drink Might Be Older Than The Sun

Newsy (Sep. 27, 2014) — Researchers at the University of Michigan simulated the birth of planets and our sun to determine whether water in the solar system predates the sun. Video provided by Newsy
Powered by NewsLook.com
First Woman Cosmonaut in 17 Years Blasts Off for ISS

First Woman Cosmonaut in 17 Years Blasts Off for ISS

AFP (Sep. 26, 2014) — A Russian Soyuz spacecraft carrying an American astronaut and two Russian cosmonauts, including the first woman cosmonaut in 17 years, blasted off on schedule Friday. Duration: 00:35 Video provided by AFP
Powered by NewsLook.com
Water Discovery On Small Planet Could Be Key To Earth 2.0

Water Discovery On Small Planet Could Be Key To Earth 2.0

Newsy (Sep. 25, 2014) — Scientists have discovered traces of water in the atmosphere of a distant, Neptune-sized planet. Video provided by Newsy
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
 
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:  

Breaking News:

More Coverage


New Habitable Zone Super-Earth Found in Exosolar System

Nov. 8, 2012 — Astronomers have discovered a new super-Earth in the habitable zone, where liquid water and a stable atmosphere could reside, around the nearby star HD 40307. It is one of three new super-Earths ... read more

Strange & Offbeat Stories

 

Space & Time

Matter & Energy

Computers & Math

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:  

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile iPhone Android Web
Follow Facebook Twitter Google+
Subscribe RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins