MessageToEagle.com

Drama Of Starbirth - Unknown Energetic Jets Pointing In
A Totally Different Direction Carefully Observed By Astronomers

20 August, 2013

Share this story:
Follow us:

MessageToEagle.com - Astronomers using the Atacama Large Millimeter/submillimeter Array (ALMA) have obtained a vivid close-up view of material streaming away from a newborn star.

By looking at the glow coming from carbon monoxide molecules in an object called Herbig-Haro 46/47 they have discovered that its jets are even more energetic than previously thought.

The very detailed new images have also revealed a previously unknown jet pointing in a totally different direction.

Young stars are violent objects that eject material at speeds as high as one million kilometres per hour. When this material crashes into the surrounding gas it glows, creating a Herbig-Haro object.



Click on image to enlarge

Stunning ALMA and NTT image of Newborn Star

This unprecedented image of Herbig-Haro object HH 46/47 combines radio observations acquired with the Atacama Large Millimeter/submillimeter Array (ALMA) with much shorter wavelength visible light observations from ESO’s New Technology Telescope (NTT). The ALMA observations (orange and green, lower right) of the newborn star reveal a large energetic jet moving away from us, which in the visible is hidden by dust and gas. To the left (in pink and purple) the visible part of the jet is seen, streaming partly towards us. Credit: ESO/ALMA (ESO/NAOJ/NRAO)/H. Arce. Acknowledgements: Bo Reipurth


A spectacular example is named Herbig-Haro 46/47 and is situated about 1400 light-years from Earth in the southern constellation of Vela (The Sails).

This object was the target of a study using ALMA during the Early Science phase, whilst the telescope was still under construction and well before the array was completed.

The new images reveal fine detail in two jets, one coming towards Earth and one moving away. The receding jet was almost invisible in earlier pictures made in visible light, due to obscuration by the dust clouds surrounding the new-born star.

ALMA has not only provided much sharper images than earlier facilities but also allowed astronomers to measure how fast the glowing material is moving through space.

These new observations of Herbig-Haro 46/47 revealed that some of the ejected material had velocities much higher than had been measured before.

This means the outflowing gas carries much more energy and momentum than previously thought.

The team leader and first author of the new study, Héctor Arce (Yale University, USA) explains that "ALMA's exquisite sensitivity allows the detection of previously unseen features in this source, like this very fast outflow. It also seems to be a textbook example of a simple model where the molecular outflow is generated by a wide-angle wind from the young star."



Click on image to enlarge

ALMA’s view of the outflow associated with the Herbig-Haro object HH 46/47

Astronomers using the Atacama Large Millimeter/submillimeter Array (ALMA) have obtained a vivid close-up view of material streaming away from a newborn star. By looking at the glow coming from carbon monoxide molecules in an object called Herbig-Haro 46/47 they have discovered that its jets are even more energetic than previously thought. In these observations from ALMA the colours shown represent the motions of the material: the blue parts at the left are a jet approaching the Earth (blueshifted) and the larger jet on the right is receding (redshifted). Credit: ESO/ALMA (ESO/NAOJ/NRAO)/H. Arce


The observations were obtained in just five hours of ALMA observation time – even though ALMA was still under construction at the time – similar quality observations with other telescopes would have taken ten times longer.

"The detail in the Herbig-Haro 46/47 images is stunning. Perhaps more stunning is the fact that, for these types of observations, we really are still in the early days. In the future ALMA will provide even better images than this in a fraction of the time," adds Stuartt Corder (Joint ALMA Observatory, Chile), a co-author on the new paper.

Diego Mardones (Universidad de Chile), another co-author, emphasises that "this system is similar to most isolated low mass stars during their formation and birth. But it is also unusual because the outflow impacts the cloud directly on one side of the young star and escapes out of the cloud on the other.

This makes it an excellent system for studying the impact of the stellar winds on the parent cloud from which the young star is formed."

Paper.

See also:
Cosmic Irony - Planets Orbiting Cooler Stars More Likely To Remain Than Planets Around Hotter Stars

Follow MessageToEagle.com for the latest news on Facebook and Twitter !

Don't Miss Our Stories! Get Our Daily Email Newsletter

Enter your email address:


Once you have confirmed your email address, you will be subscribed to the newsletter.

Recommend this article:

Something Mysteriously Warms Antarctica Ice
Very rapid climate changes take place on Antarctica. "Something" mysteriously warms Antarctica Ice and it's a dangerous process. The huge 18-mile-long crack that was discovered at the end of last year, is still growing and it remains unclear what is causing the sudden change in temperature. Antarctica is getting warmer and the melting of ice is adding to global sea level rise.

Gigantic Reservoir Of Water Located 12 Billion Light-Years Away From Earth Discovered

"The Most Profound Mystery In All Of Science" - Dark Energy

Subscribe To Our Space, Astronomy, Astrophysics, Earth and Xenology News!

Grab the latest RSS feeds right to your reader, desktop or mobile phone.

Subscribe to RSS headline updates from:
Powered by FeedBurner

Go to - MAIN PAGE

Copyright @ MessageToEagle.com All rights reserved.
Go to - MAIN PAGE

 Subscribe in a reader

Join Us On Facebook!


Other Popular Articles

Geological Rift That Baffles Scientists Is Still Expanding
This huge rift can be clearly seen from space. Geologists are truly surprised at how fast it developed, when a 60 meter long rift opened up in Ethiopia.
It occurred in the course of a few days, in 2005 and the rift is still expanding.

Fastest Wind Ever Coming From A Disk Around Stellar-Mass Black Hole Discovered
This record breaking wind is moving about 20 million miles per hour - about 3% the speed of light and may be carrying away much more material than the black hole is actually capturing. This is nearly ten times faster than had ever been seen from a stellar-mass black hole, and matches some of the fastest winds g enerated by supermassive black holes, objects millions or billions of times more massive.

Extremely Distant And Exotic Quasar
It is an exotic and distant object, which has a velocity of recession of approximately 270,000 kilometers per second (!) or - 91 percent of the velocity of light itself.
The results show that this quasar, known as Q1442+101, is among exotic objects receding from the Milky Way at tremendous velocities of thousands and occasionally even hundreds of thousands of kilometers per second!

Very Puzzling Appearance And Trajectory Of Fireballs
In the middle of the night on February 13th, something disturbed the animal population of rural Portal, Georgia. Cows started mooing anxiously and local dogs howled at the sky. The cause of the commotion was a rock from space.

20,000-Solar-Mass Black Hole Found At The Core Of A Now-Destroyed Dwarf Galaxy
The formation of stellar-mass black holes through the collapse of massive stars is well accepted. However, it is not yet completely clear how the supermassive objects are formed.
They may form through the merger of smaller, intermediate-mass black holes (IMBHs) weighing hundreds to thousands of suns.

Unusual Pulsar Or Alien Signals?
The pulse timing of this object is considered unusual. What kind of phenomenon is related to this object? It is the first time this kind of phenomenon has been observed by astronomers.


The "Cloaked" Star Was Difficult To Find
An object obscured by dust, and buried in a two-star system enshrouded by dense gas, is not easy to find.
A "cloaked" star was discovered after it ate a little of its neighbor. The meal must have given the star a bit of indigestion, because it "burped" with a blast of high-energy radiation, which gave it away.


Monster Star Thousand Times Bigger Than Our Sun Could Soon Explode - with video
Despite its enormous size, the star has not been identified as yellow hypergiant until recently...


Black Gaps In The Sky Puzzle Astronomers
Very dark isolated interstellar clouds of very cold gas like black gaps have puzzled astronomers for more than a century.
Looking at the sky in the direction of the constellation Sagittarius, it is clear that there are extremely dark, opaque knots of gas and dust especially in the region toward the center of our Milky Way.


Invader From Another Galaxy
This alien intruder from another galaxy is in many ways different from other exoplanets observed by astronomers.
Located about 2000 light-years from Earth in the southern constellation of Fornax (the Furnace), the Jupiter-like planet orbits a dying star of extragalactic origin and risks to be engulfed by it.


Intimate Connection Between Black Holes And New-Born Stars
Astronomers have known for some time that black holes and supermassive black holes accretion and star formation appear intimately connected.
However, it does not mean that powerful gravitational forces of the black holes disrupt surrounding material in their vicinity.

W3Counter