One of a many sparkling astrophysics discoveries in new memory competence be a mirage.
In March, a group of scientists announced that they had found evidence of former gravitational waves, hypothesized ripples in space-time whose existence would advise that a star did indeed enhance many times faster than a speed of light in a initial few instants after a Big Bang, as posited by a “cosmic inflation” theory.
But some outward researchers fast lifted questions about a discovery, that was done regulating observations by a Background Imaging of Cosmic Extragalactic Polarization (BICEP2) telescope in Antarctica. The ostensible gravitational-wave signal, a skeptics said, competence indeed be a contaminant, a outcome of dirt and gas within a possess Milky Way galaxy. [The Big Bang to Now in 10 Easy Steps]
The BICEP2 group saw a polarization settlement famous as “B modes” in the cosmic x-ray background(CMB), a ancient light left over from a Big Bang that combined a star 13.8 billion years ago. Wide acceptance of a supposed find will expected come usually if other instruments collect it up, too — in particular, a European Space Agency’s Planck satellie, that mapped out a CMB in excellent fact from 2009 to 2013.
The Planck group has indeed followed adult a BICEP2 result, examining information from a same patch of sky in a accumulation of frequencies that operation from 30 gigaherz to 857 gigaherz. (BICEP2 looked in only a singular frequency, 150 gigaherz.) And a news is not good for a BICEP2 crew, a new investigate reports.
“Unfortunately, according to a analysis, a outcome of contaminants and in sold of gases benefaction in a star can't be ruled out,” co-author Carlo Baccigalupi of a International School for Advanced Studies in Trieste, Italy, said in a statement.
The new investigate does not order out a probability that BICEP2 unequivocally did see a signature of former gravitational waves, however. Indeed, Planck scientists are operative with a find group to see if this could be a case.
“We have started a partnership with BICEP2. We are directly comparing their information with a Planck data, in a same frequency, 150 GHz, and perplexing to feat a picture of a contaminants we strech with Planck during other frequencies,” Baccigalupi said. ?”This way, we wish to be means to give a decisive answer. In fact, we competence find that it was indeed a contamination, but, given that we’re optimists, we competence even be means to bar it with confidence.”
If a find is confirmed, Baccigalupi added, it “would open a totally new window onto different scenarios in a investigate of a former star and very-high-energy physics.”
The new investigate from a Planck group will be published Monday (Sept. 29) in a biography Astronomy Astrophysics. You can review a preprint of it here: http://arxiv.org/abs/1409.5738
- Cosmic Inflation and Gravitational Waves: Discovery Images
- The Search for Gravitational Waves (Gallery)
- Oldest Light In The Universe – How It Traveled To Us | Video
Copyright 2014 SPACE.com, a TechMediaNetwork company. All rights reserved. This element competence not be published, broadcast, rewritten or redistributed.