technology-news

Classification of brown dwarfs hinging between stars and planets

Washington, Sept. 6 : Brown dwarfs, sometimes called failed stars, are indeed the coldest known free-floating celestial bodies, and are warmer than previously believed with temperatures hovering at about 250-350 degrees Fahrenheit, according a new study.


To reach such low surface temperatures after cooling for billions of years means that these objects can only have about 5 to 20 times the mass of Jupiter.

Unlike the Sun, these objects' only source of energy is from their gravitational contraction, which depends directly on their mass.

Trent Dupuy, a Hubble Fellow at the Harvard-Smithsonian Center for Astrophysics, said that if one of these objects was found orbiting a star, there will be a good chance that it would be called a planet.

But because they probably formed on their own and not in a proto-planetary disk, astronomers still call these objects brown dwarfs even if they are 'planetary mass.'

Characterizing these cold brown dwarfs is challenging because they emit most of their light at infrared wavelengths, and they are very faint due to their small size and low temperature.

The study has been published in the Science Express online.

--ANI (Posted on 06-09-2013)

technology-news headlines

New insights on how brain develops memories

Oxygen injections to protect you from air pollution

Sea deposits to build your smart phone!

Google Glass to assist surgeons soon

Soon, floating n-plants that survive tsunami, quakes

Ancient meteors reveal Red Planet's early atmosphere

Global warming to hit your bubbly's taste!

How gut microbes helped our ancestors adapt and survive during Paleolithic era

Three more 'blood moons' to appear in next 18 months

T. rex's neck was powerful enough to hunt and attack

Planets having odd tilts could be habitable

Mars' thin atmosphere may have led to its cold, dry conditions

Quick Links: Goa | Munnar | Pondicherry | Free Yearly Horoscope '2014

Comments

Your e-mail:


Your Full Name:


Type verification image:
verification image, type it in the box

Message:

Back to Top