PDA

View Full Version : Newborn Star Blasting Out Powerful Jets



Fraser
2007-Nov-29, 08:44 PM
It's always exciting to see an idea in theory verified with real observations. For the first time, astronomers have observed a theoretical stage in stellar evolution, when a star's envelope is beginning to flatten and collapse, and streams of gas are escaping out. ...

Read the full blog entry (http://www.universetoday.com/2007/11/29/newborn-star-blasting-out-powerful-jets/)

dgavin
2007-Dec-02, 04:04 AM
Now that is Cool!

I hope they can Discover one in the T-Tuari Stage and one right after the Fusion Ignition Began.

trinitree88
2007-Dec-02, 05:09 PM
http://www.universetoday.com/2007/11/29/newborn-star-blasting-out-powerful-jets/

Fraser. If the envelope collapses, why wouldn't the material relieving the pressure leave from the spinning equatorial regions....that's where satellites are launched because escape velocity is lower there on Earth. The relatively slow moving polar regions have a higher escape velocity, No? pete

Jerry
2007-Dec-02, 07:49 PM
http://www.universetoday.com/2007/11/29/newborn-star-blasting-out-powerful-jets/

Fraser. If the envelope collapses, why wouldn't the material relieving the pressure leave from the spinning equatorial regions....that's where satellites are launched because escape velocity is lower there on Earth. The relatively slow moving polar regions have a higher escape velocity, No? pete

Excellent question!

A realistic gravitational model may see the released material migrate toward the poles, but not be ejected from the poles. The dynamics of a bipolar rejection of matter require an electromagnetic or unknown source, not gravity as it is defined today. Note that the event horizon of a 'black hole' is neither at the poles nor 'equator' but in the latitudes where a combination of effects favor the release of high amounts of energy. The tight 'event horizons' observed are a challenge.