Navigation Links
Planetary "first family" discovered by astronomers using Gemini and Keck Observatories
Date:11/14/2008

Astronomers using the Gemini North telescope and W.M. Keck Observatory on Hawaii's Mauna Kea, the tallest mountain in the Hawaiian chain, have obtained the first-ever direct images identifying a multi-planet system around a normal star.

The Gemini images allowed the international team to make the initial discovery of two of the planets in the confirmed planetary system with data obtained on Oct. 17, 2007. Then, on Oct. 25, 2007, and in the summer of 2008, the team, led by Christian Marois of the National Research Council of Canada's Herzberg Institute of Astrophysics in Victoria, British Columbia, and members from the U.S. and U.K., confirmed this discovery and found a third planet orbiting even closer to the star with images obtained by the Keck II telescope. These historic infrared images of an extra-solar multiple-planet system were made possible by adaptive optics technology used to correct in real time for atmospheric turbulence, the shimmering or blinking of starlight as it passes through the earth's atmosphere.

"This discovery is significant--it is the first time a family of planets around a normal star outside of our solar system was imaged," said Brian Patten, program manager at the National Science Foundation. "Scientists may now directly view planets themselves, as opposed to indirectly through a star's spectrum or its brightness."

Research results will be published in the Nov.13, 2008, issue of Science Express, an international weekly science journal.

The host star, a young, massive star called HR 8799, is about 130 light years away from Earth. Comparison of multi-epoch data shows that the three planets are all moving with, and orbiting around, the star, proving that they are associated with it rather than just unrelated background objects coincidentally aligned in the image.

The planets, which formed about 60 million years ago, are young enough that they are still glowing from heat released as they contracted, making them easier to see in infrared light. Analysis of the brightness and colors of the objects at multiple wavelengths shows that these objects are about seven and 10 times the mass of Jupiter. As in our solar system, these giant planets orbit in the outer regions of this system--at roughly 25, 40, and 70 times the Earth-Sun separation. The furthest planet orbits just inside a disk of dusty debris, similar to that produced by the comets of the Kuiper Belt objects of our solar system just beyond the orbit of Neptune at 30 times the Earth-Sun distance. In some ways, this planetary system seems to be a scaled-up version of our solar system orbiting a larger and brighter star.

HR 8799 observations are part of a survey of 80 such young, dusty, and massive stars located in the solar neighborhood. The survey is using adaptive optics systems at Gemini, Keck and VLT in Chile to constrain the Jupiter-mass planet populations in a range of separations inaccessible to other exoplanet detection techniques. This discovery was made after observing only a few stars, which may lead to the conclusion that Jupiter-mass planets at separations similar to the giant planets of our solar system are frequent around stars more massive than the Sun, Marois said. "HR 8799's planetary system will be studied in great detail in the years to come, and it will surely be a prime target for future next-generation, exoplanet finding instruments and dedicated space missions."


'/>"/>

Contact: Lisa-Joy Zgorski
lzgorski@nsf.gov
703-292-8311
National Science Foundation
Source:Eurekalert

Related biology news :

1. Planetary geoscience, paleontology, and more at GSA Annual Meeting in Denver next month
2. New regulatory mechanism discovered for cell identify and behavior in forming organs
3. New cell division mechanism discovered
4. Newly-discovered mechanism can explain the Beckwith-Wiedemann syndrome
5. Important new hair-loss gene discovered
6. Earliest animal footprints ever found -- discovered in Nevada
7. Formula discovered for longer plant life
8. New mechanism for cardiac arrhythmia discovered
9. How are herbicides discovered?
10. Key discovered to cold tolerance in corn
11. Unexpected large monkey population discovered
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:3/28/2017)... , March 28, 2017 The ... Hardware (Camera, Monitors, Servers, Storage Devices), Software (Video Analytics, ... Region - Global Forecast to 2022", published by MarketsandMarkets, ... 2016 and is projected to reach USD 75.64 Billion ... and 2022. The base year considered for the study ...
(Date:3/24/2017)... 24, 2017 The Controller General of Immigration from ... Abdulla Algeen have received the prestigious international IAIR Award for the ... Continue Reading ... ... Controller Abdulla Algeen (small picture on the right) have received the IAIR ...
(Date:3/23/2017)... The report "Gesture Recognition and Touchless Sensing Market by Technology (Touch-based ... to 2022", published by MarketsandMarkets, the market is expected to be worth USD ... 2022. Continue Reading ... ... ...
Breaking Biology News(10 mins):
(Date:10/11/2017)... and LAGUNA HILLS, Calif. , Oct. ... Cancer Research, London (ICR) and University ... SKY92, SkylineDx,s prognostic tool to risk-stratify patients with multiple myeloma ... MUK nine . The University of Leeds ... partly funded by Myeloma UK, and ICR will perform the ...
(Date:10/10/2017)... ... 2017 , ... San Diego-based team building and cooking events company, Lajollacooks4u, has ... The bold new look is part of a transformation to increase awareness, appeal to ... period. , It will also expand its service offering from its signature gourmet cooking ...
(Date:10/10/2017)... 10, 2017 International research firm Parks Associates announced ... at the TMA 2017 Annual Meeting , October 11 in ... residential home security market and how smart safety and security products impact ... Parks Associates: Smart Home ... "The residential security market has ...
(Date:10/9/2017)... DIEGO , Oct. 9, 2017  BioTech ... biological mechanism by which its ProCell stem cell ... critical limb ischemia.  The Company, demonstrated that treatment ... amount of limbs saved as compared to standard ... the molecule HGF resulted in reduction of therapeutic ...
Breaking Biology Technology: