Quote:
Astronomers Identify New Galaxy Class – Green Bean Galaxies
A team of astronomers, led by Dr Mischa Schirmer of the Gemini Observatory, using observations from ESO’s Very Large Telescope (VLT), the Gemini South telescope and the Canada-France-Hawaii Telescope, has identified a new galaxy type called ‘green bean galaxies.’
...
After the discovery, Dr Schirmer’s team searched through a list of nearly a billion other galaxies and found 16 more with similar properties, which were confirmed by observations made at the Gemini South telescope. These galaxies are so rare that there is on average only one in a cube about 1.3 billion light-years across. This new class of galaxies has been nicknamed green bean galaxies because of their color and because they are superficially similar to, but larger than, green pea galaxies.
Source: Astronomers Identify New Galaxy Class - Green Bean Galaxies | Astronomy | Sci-News.com
|
Green pea galaxies were first discovered in 2007 by the volunteer users within the forum section of the online astronomy project Galaxy Zoo and are typically no bigger than 16,300 light-years across. Green pea galaxies are metal poor, which suggests they are very old.
Unlike other galaxies that have a super massive black hole, causing the galaxy center to glow, with both green pea and green bean galaxies the entire galaxy glows with a green light due to doubly ionized oxygen (OIII), and high levels of x-ray emissions.
Green bean galaxies are even more rare than green pea galaxies. They are bigger than 16,300 light-years across, and like their pea galaxy cousin, have strong emission line in the OIII wavelength (between 495.9 and 500.7 nm). Green bean galaxies are also the most active star-forming galaxies ever found.
Sources:
Galaxy Zoo Discovers New Group of Galaxies: 'Green Peas'
Astronomer unveils the mysteries of "Green Pea" galaxies - Astronomy Magazine
Pea galaxy - Wikipedia, the free encyclopedia
Please register to participate in our discussions with 2 million other members - it's free and quick! Some forums can only be seen by registered members. After you create your account, you'll be able to customize options and access all our 15,000 new posts/day with fewer ads.
