PDA

View Full Version : First Full Science Results in From Herschel



Fraser
2010-May-07, 10:40 PM
Just days before the first anniversary of the Herschel space observatory's launch, the first full science results along with some very pretty images were released at a symposium in the Netherlands. "Herschel is a new eye on a part of the cosmos that has been dark and buried for a long time," said [...]

More... (http://www.universetoday.com/2010/05/07/first-full-science-results-in-from-herschel/)

Jerry
2010-May-08, 02:38 PM
Jason Dukleth Says:
"This article leaves out a key point from the original. Even though we call them "impossible stars", there are many that we know to exist. As far as our current theories go, the intense light emanating from stars > 8 solar masses should blow away the surrounding dust/gas before they are able to get any larger.

Having an active example gives us an opportunity to figure out where our thinking is faulty."

I'm waiting for the ultra deep images that should find the universe in its infancy...dollar on a dime says we will keep finding these gul darn mature galazies everywhere.

See http://arxiv.org/abs/1003.2935v1 for a primer

I should have looked at the ESA site first:


In the mid-1990s, astronomers discovered that a faint fog of infrared radiation bathes the Universe, and termed it the cosmic infrared background. Herschel is the first telescope to resolve most of the blur into individual celestial objects.
Herschel made its observations in October 2009 and January 2010. It targeted two regions of the sky, one known as GOODS-North, the other GOODS-South. The latter is the most sensitive far-infrared image yet taken by Herschel. The GOODS fields are designated for studying the distant Universe and have been extensively investigated by other observatories. Neither contains nearby celestial objects, allowing telescopes to see straight out into the deepest regions of space. Herschel resolved the cosmic infrared background into 300 previously unseen galaxies in GOODS-N, and 800 of them in GOODS-S. Together, these galaxies contribute more than half the power to the infrared background in these regions.

Crowded. The ESA also says

http://www.esa.int/SPECIALS/Herschel/SEMO1AKPO8G_0.html

"The galaxies are young, some of them seen at a time when the Universe was just 16% of its present age. They are forming young stars, in some case up to thousands every year. Our own Galaxy forms an average of just three per year. "

The large bright star forming galaxies/merges always appear show up the deepest. Check out the shapes: There is a lot of pretty normal looking stuff emerging in these deep surveys, too; and not a lot of elbow room for a CMB to slide through.


The first spectral line surveys searching for signals from the Dark Ages