Featured Research

from universities, journals, and other organizations

Youngest extra-solar planet discovered around solar-type star

Date:
February 19, 2010
Source:
University of Hertfordshire
Summary:
Astronomers have discovered the youngest extra-solar planet around a solar-type star, named BD+20 1790b.

Artistic impression of BD+20 1790b.
Credit: M. Hernán Obispo

Astronomers have discovered the youngest extra-solar planet around a solar-type star, named BD+20 1790b.

The giant planet, six-times the mass of Jupiter, is only 35 million years old. It orbits a young active central star at a distance closer than Mercury orbits the Sun. Young stars are usually excluded from planet searches because they have intense magnetic fields that generate a range of phenomena known collectively as stellar activity, including flares and spots. This activity can mimic the presence of a companion and so can make extremely difficult to disentangle the signals of planets and activity.

University of Hertfordshire astronomers, Dr Maria Cruz Gálvez-Ortiz and Dr John Barnes, are part of the international collaboration that made the discovery.

Dr Maria Cruz Gálvez-Ortiz, describing how the planet was discovered, said: "The planet was detected by searching for very small variations in the velocity of the host star, caused by the gravitational tug of the planet as it orbits -- the so-called 'Doppler wobble technique.' Overcoming the interference caused by the activity was a major challenge for the team, but with enough data from an array of large telescopes the planet's signature was revealed."

There is currently a severe lack of knowledge about early stages of planet evolution. Most planet-search surveys tend to target much older stars, with ages in excess of a billion years. Only one young planet, with an age of 100 million years, was previously known. However, at only 35 million years, BD+20 1790b is approximately three times younger. The detection of young planets will allow the testing of formation scenarios and to investigate the early stages of planetary evolution.

BD+20 1790b was discovered using observations made at different telescopes, including the Observatorio de Calar Alto (Almería, Spain) and the Observatorio del Roque de los Muchachos (La Palma, Spain) over the last five years. The discovery team is an international collaboration including: M.M. Hernán Obispo, E. De Castro and M. Cornide (Universidad Complutense de Madrid, Spain), M.C. Gálvez-Ortiz and J.R. Barnes, (University of Hertfordshire, U.K.), G. Anglada-Escudé (Carnegie Institution of Washington, USA) and S.R. Kane (NASA Exoplanet Institute, Caltech, USA).

The discovery has just been published in the journal Astronomy & Astrophysics.


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. M. Hernán-Obispo, M.C. Gálvez -Ortiz, G. Anglada-Escudé, S.R. Kane, J.R. Barnes, E. de Castro and M. Cornide. Evidence of a massive planet candidate orbiting the young active K5V star BD 20 1790. Astronomy and Astrophysics, 2010; DOI: 10.1051/0004-6361/200811000

Cite This Page:

University of Hertfordshire. "Youngest extra-solar planet discovered around solar-type star." ScienceDaily. ScienceDaily, 19 February 2010. <www.sciencedaily.com/releases/2010/02/100218092752.htm>.
University of Hertfordshire. (2010, February 19). Youngest extra-solar planet discovered around solar-type star. ScienceDaily. Retrieved August 27, 2014 from www.sciencedaily.com/releases/2010/02/100218092752.htm
University of Hertfordshire. "Youngest extra-solar planet discovered around solar-type star." ScienceDaily. www.sciencedaily.com/releases/2010/02/100218092752.htm (accessed August 27, 2014).

Share This




More Space & Time News

Wednesday, August 27, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

SpaceX’s Falcon 9 Rocket Explodes After Liftoff

SpaceX’s Falcon 9 Rocket Explodes After Liftoff

Newsy (Aug. 23, 2014) — The private spaceflight company says it is preparing a thorough investigation into Friday's mishap. Video provided by Newsy
Powered by NewsLook.com
Did Russia Really Find Plankton On The ISS? NASA Not So Sure

Did Russia Really Find Plankton On The ISS? NASA Not So Sure

Newsy (Aug. 21, 2014) — Russian cosmonauts say they've found evidence of sea plankton on the International Space Station's windows. NASA is a little more skeptical. Video provided by Newsy
Powered by NewsLook.com
Space to Ground: Hello Georges

Space to Ground: Hello Georges

NASA (Aug. 18, 2014) — Europe's ATV-5 delivers new science and the crew tests smart SPHERES. Questions or comments? Use #spacetoground to talk to us. Video provided by NASA
Powered by NewsLook.com
Tiny Satellites, Like The One Tossed From ISS, On The Rise

Tiny Satellites, Like The One Tossed From ISS, On The Rise

Newsy (Aug. 18, 2014) — The Chasqui I, hand-delivered into orbit by a Russian cosmonaut, is one of hundreds of small satellites set to go up in the next few years. 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:
from the past week

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