Birth of a baby planet

Mar 02, 2011
Artist's impression of the birth of a planet.

(PhysOrg.com) -- University of Sydney astronomer, Professor Peter Tuthill, is one of an international team of astronomers who have announced a major step forward in the quest to find planets in orbit around distant stars. The discovery has been published in the international journal Astronomy and Astrophysics.

The team believe this to be the first image of a solar system caught in the act of formation.

Professor Tuthill said modern scientific ideas describing the way planets are expected to form can be traced to the 1700s.

"The philosopher Immanuel Kant proposed that they grow within a vast spinning pancake of dust which is the messy remnant leftover from the formation of the sun or star at the middle.

"Following a sort of snowball runaway effect, orbiting debris in the disk is expected to clump up into ever larger pieces until one becomes massive enough to draw in all the matter from the vicinity of its orbit. At this point, the fledgling planet will have cleared a gap or ring in the disk."

Although a number of such gaps have been found by astronomers, Kant's theory linking them to planets has remained in the realm of unproved phenomena, until now.

This first planetary baby-snap published by the team have caught a tiny fleck of light, betraying the presence of a massive body like a planet or possibly a brown dwarf, orbiting exactly on queue within the vacant gap in the disk surrounding the star T Chamaeleontis.

"For understanding , this marks a major milestone," said Nuria Huélamo of Spain's Centro de Astrobiología, first author of the work to be published in the journal this month.

"This could be the first time we have been able to witness a companion digging a gap inside its protoplanetary disc."

"In addition to the exciting science, this result also represents a technical tour-de-force," adds Professor Tuthill whose team designed the instrument which recovered the images.

"You have got to work very hard to see that faint mote of light against the overwhelming glare when the telescope is staring almost directly at a bright star like T Chamaeleontis."

The quest to image planetary newborns has been one of the most sought-after goals in modern astronomy, and needed the power of the giant telescopes at the European Southern Observatory's Paranal observatory in Northern Chile.

"As with biology, studying newborns teaches us a lot," says Dr Michael Ireland, also on the Sydney team.

"We get to see their initial properties before they get scrambled up and influenced by their environment. However there is a practical reason too: a young planet is basically a searing ball of hot lava, and glows quite brightly making it much easier to detect compared to mature cool planets like those in our solar system."

Summing up the significance of the work, team member Dr Sylvestre Lacour of Paris Observatory said, "This result has opened a whole new window on our universe, let's just hope that through it we get to see many more newborn twinkling in the gaps they have sculpted."

Explore further: First potentially habitable Earth-sized planet confirmed: It may have liquid water

More information: www.aanda.org/

Provided by University of Sydney

5 /5 (9 votes)

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User comments : 4

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Quantum_Conundrum
1 / 5 (9) Mar 02, 2011
Nice artists impression.

It is almost requires some skill to draw a circle and a cloud of dust.

Why is it that everything in "science" these days is an artists impression? Could it be because they don't actually have anything remotely related to scientific facts any more?

Anyone can draw an "artist impression" of anything. I can draw a pink elephant and that is what a pink elephant should look like. Nice and pretty pink elephants. Nothing to do with science though...
technicalengeneering
5 / 5 (4) Mar 02, 2011
@QC come on not to harsh, have a bit of respect for the artist (you probably couldn't do it yourself, and if you can your just denigrating yourself).
Would have like to see their picture, but it's probably not publicly released jet.
Ryan_Nordstrom
5 / 5 (5) Mar 02, 2011
I would also prefer to have the hard data, but most people would find the actual image boring and confusing. Or, more accurately, boring because they don't understand it.

As for your comment: "Why is it that everything in "science" these days is an artists impression? Could it be because they don't actually have anything remotely related to scientific facts any more?" That's just absurd to the point of hilarity. Honestly, it makes you look ignorant. Just letting you know.
DamienS
5 / 5 (4) Mar 02, 2011
Why is it that everything in "science" these days is an artists impression?

The main reason is that a pop-sci article requires some kind of cool graphic so that the masses have some reason to read the text. Secondly, most of these types of graphics are in the public domain and tend to get recycled for different stories. They are almost never included in the actual research paper.
Could it be because they don't actually have anything remotely related to scientific facts any more?

No, see above. In fact, it's because they DO have lots of dry, often unintelligible to the layman, data and observations, that pop editors feel the need to add pretty pictures.
I can draw a pink elephant and that is what a pink elephant should look like. Nice and pretty pink elephants. Nothing to do with science though

Well, if the general public wasn't so disinterested in science, there would be less need to 'sex up' a story, which is interesting in its own right.

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