Hydrogen peroxide found in space

Jul 06, 2011
The colourful Rho Ophiuchi star formation region, about 400 light-years from Earth, contains very cold (around -250 degrees Celsius), dense clouds of cosmic gas and dust, in which new stars are being born. The clouds are mostly made of hydrogen, but contain traces of other chemicals, and are prime targets for astronomers hunting for molecules in space. Astronomers using the APEX telescope to observe this region discovered hydrogen peroxide molecules in interstellar space for the first time, in the area marked with the red circle. This is also a rich region for amateur observations. Rho Ophiuchi itself is the bright star near the top of the image. The bright yellowish star in the bottom left is Antares, one of the brightest stars in the sky. Below and to Antares’ right is the globular cluster Messier 4. This image of the region was obtained from the Paranal Observatory by observing with a 10-cm Takahashi FSQ106Ed f/3.6 telescope and a SBIG STL CCD camera, using a NJP160 mount. Images were collected through three different filters (B, V and R) and then stitched together. It was originally created as part of ESO’s Gigagalaxy Zoom project. Credit: ESO/S. Guisard

(PhysOrg.com) -- Molecules of hydrogen peroxide have been found for the first time in interstellar space. The discovery gives clues about the chemical link between two molecules critical for life: water and oxygen. On Earth, hydrogen peroxide plays a key role in the chemistry of water and ozone in our planet’s atmosphere, and is familiar for its use as a disinfectant or to bleach hair blonde. Now it has been detected in space by astronomers using the ESO-operated APEX telescope in Chile.

An international team of astronomers made the discovery with the Atacama Pathfinder Experiment telescope (APEX), situated on the 5000-metre-high Chajnantor plateau in the Chilean Andes. They observed a region in our galaxy close to the star Rho Ophiuchi, about 400 light-years away. The region contains very cold (around -250 degrees Celsius), dense clouds of cosmic gas and dust, in which new stars are being born. The clouds are mostly made of hydrogen, but contain traces of other chemicals, and are prime targets for astronomers hunting for molecules in space. Telescopes such as APEX, which make observations of light at millimetre- and submillimetre-wavelengths, are ideal for detecting the signals from these molecules.

Now, the team has found the characteristic signature of light emitted by , coming from part of the Rho Ophiuchi clouds.

“We were really excited to discover the signatures of hydrogen peroxide with APEX. We knew from laboratory experiments which wavelengths to look for, but the amount of hydrogen peroxide in the cloud is just one molecule for every ten billion hydrogen molecules, so the detection required very careful observations,” says Per Bergman, astronomer at Onsala Space Observatory in Sweden. Bergman is lead author of the study, which is published in the journal Astronomy & Astrophysics.

Hydrogen peroxide (H2O2) is a key molecule for both astronomers and chemists. Its formation is closely linked to two other familiar molecules, and water, which are critical for life. Because much of the water on our planet is thought to have originally formed in space, scientists are keen to understand how it is created.

Hydrogen peroxide is thought to form in space on the surfaces of cosmic dust grains — very fine particles similar to sand and soot — when hydrogen (H) is added to oxygen molecules (O2). A further reaction of the hydrogen peroxide with more hydrogen is one way to produce water (H2O). This new detection of hydrogen peroxide will therefore help astronomers better understand the formation of water in the Universe.

“We don’t understand yet how some of the most important molecules here on Earth are made in . But our discovery of hydrogen peroxide with APEX seems to be showing us that cosmic dust is the missing ingredient in the process,” says Bérengère Parise, head of the Emmy Noether research group on star formation and astrochemistry at the Max-Planck Institute for Radio Astronomy in Germany, and a co-author of the paper.

To work out just how the origins of these important are intertwined will need more observations of Rho Ophiuchi and other star-forming clouds with future telescopes such as the Atacama Large Millimeter/submillimeter Array (ALMA) — and help from chemists in laboratories on .

This research is published in the journal Astronomy & Astrophysics.

Explore further: Image: Chandra's view of the Tycho Supernova remnant

More information: www.aanda.org/10.1051/0004-6361/201117170

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omatumr
1.8 / 5 (5) Jul 06, 2011
The occurrence of strong oxidizers and/or reducers in space is not surprising.

However, the occurrence of these in material that has throughly mixed to form the solids of meteorites or planets would be surprising.

With kind regards,
Oliver K. Manuel
Former NASA Principal
Investigator for Apollo
Shootist
3.8 / 5 (5) Jul 06, 2011

However, the occurrence of these in material that has throughly mixed to form the solids of meteorites or planets would be surprising.


Wouldn't Brownian (random) Motion be sufficient, unto itself, to ensure mixing over billions of years? Not to mention, gravity, light pressure and electromagnetic effects?

Temple
4.5 / 5 (2) Jul 06, 2011
Wouldn't Brownian (random) Motion be sufficient, unto itself, to ensure mixing over billions of years? Not to mention, gravity, light pressure and electromagnetic effects?


Brownian motion describes the motions of particles suspended in a fluid. I'm not aware of any results which have found a similar analog with vacuum fluctuations or what have you.

Though, I agree that the ridiculously complex system of light pressure, stellar winds, coronal ejections, stellar layer shedding, novae, gravity, etc would do a pretty good job of mixing differently sized, shaped, massed, etc particles over many billions of years.
omatumr
1.3 / 5 (7) Jul 06, 2011
Wouldn't Brownian (random) Motion be sufficient, unto itself, to ensure mixing over billions of years? Not to mention, gravity, light pressure and electromagnetic effects?


We all once thought that elements and isotopes would be throughly mixed in fresh supernova debris.

But they weren't in the supernova debris that formed the solar system.

Many chemical and isotopic gradients in the parent star are still preserved that way today.

With kind regards,
Oliver K. Manuel

Shootist
3 / 5 (2) Jul 06, 2011
I though Brownian Motion also described random motion of gas molecules, in a gas, no matter how tenuous.

Doctor Manuel

I do not follow you. I would think it obvious that our Solar System formed from the debris of not only Super Novas, but Wolf-Rayet stars, the planetary nebulae of Red Giants, and Super Giants like Eta Carina.

I cannot imagine the material in the Solar System came from one source. What leads you to that conclusion?
LKD
1 / 5 (1) Jul 12, 2011
I would assume that the point is how Kuiper, Outer and Inner planets are not at all alike, and even within each belt, the inconsistency of planetary makeup is quite varied.

I will be honest and was expecting a blonde joke in the comments..