False-color image of galaxy LAEJ095950.99+021219.1 (Credit: James Rhoads/ASU)

Astronomers Take “Baby Picture” of an Incredibly Distant Galaxy

1 Jun , 2012 by

[/caption]

Astronomers from Arizona State University have grabbed an image of a dim, distant galaxy, seeing it as it looked only 800 million years after the birth of the Universe. Visible above as a green blob in the center of a false-color image acquired with the Magellan Telescopes at the Las Campanas Observatory in Chile, the galaxy is seen in its infancy and, at 13 billion light-years away, is one of the ten most distant objects ever discovered.

The galaxy, designated LAEJ095950.99+021219.1, was detected by light emitted by ionized hydrogen using the Magellan Telescopes’ IMACS (Inamori-Magellan Areal Camera & Spectrograph) instrument, built at the Carnegie Institute in Washington. In order to even find such a remote object — whose existence had already been suspected — the team had to use a special narrow-band filter on the IMACS instrument designed to isolate specific wavelengths of light.

“Young galaxies must be observed at infrared wavelengths and this is not easy to do using ground-based telescopes, since the Earth’s atmosphere itself glows and large detectors are hard to make,” said team leader Sangeeta Malhotra, an associate professor at ASU who helped develop the technique.

“As time goes by, these small blobs which are forming stars, they’ll dance around each other, merge with each other and form bigger and bigger galaxies. Somewhere halfway through the age of the universe they start looking like the galaxies we see today – and not before.”

– Sangeeta Malhotra, ASU professor 

LAEJ095950.99+021219.1 is seen at a redshift of 7, putting it farther away than any other objects previously discovered using the narrow-band technique.

(What is redshift? Watch “How To Measure The Universe” here.)

“We have used this search to find hundreds of objects at somewhat smaller distances. We have found several hundred galaxies at redshift 4.5, several at redshift 6.5, and now at redshift 7 we have found one,” said James Rhoads, associate professor at ASU and research team leader.

“This image is like a baby picture of this galaxy, taken when the universe was only 5 percent of its current age. Studying these very early galaxies is important because it helps us understand how galaxies form and grow.”

So why does LAEJ095950.99+021219.1 not look much like the galaxies we’re used to seeing in images?

Malhotra explains: “Somewhere halfway through the age of the universe they start looking like the galaxies we see today – and not before. Why, how, when, where that happens is a fairly active area of research.”

The team’s NSF-funded research was published in Astrophysical Journal Letters. Read more on Phys.Org News here.

, , , , , , , , ,



Sort by:   newest | oldest | most voted
hunterz85
Guest
June 1, 2012 8:40 PM

I like galaxy name (number) LAEJ095950.99+021219.1

magnus.nyborg
Guest
magnus.nyborg
June 2, 2012 7:13 AM

They trie the name Bob, but the assistant director already had a kid with that name.

Jason Major
Guest
June 2, 2012 9:06 PM

They could have just spelled it backwards — doh!!!

Lawrence B. Crowell
Member
Lawrence B. Crowell
June 2, 2012 2:56 AM
It is interesting to see how this compares to the Hubble relationship v = Hd. The Hubble constant, or really parameter is H = 72km/s/Mpc, Mpc = megaparsec. A parsec is 3.26lightyears. The redshift factor is z = v/c = 7. The distance is then d = v/H = (7x3x10^5/72)Mpc = 29166Mpc or 9.5 billion light years. This is somewhat close but far enough to show there is a deviation from the quoted result of 13 billion light years. It is worth noting that the redshift factor indicates this galaxy is moving outwards 7 times faster than the speed of light. However, it is really framed dragged along by the expansion of space itself. There is however no… Read more »
MeyerKaty
Guest
MeyerKaty
June 2, 2012 5:26 PM

m y f rie nd’s aun t ma de $17 398 the pr evious we ek. s he is m aking inc ome on the int ern et an d bo ught a $ 57 8000 h ouse. A ll s he di d wa s ge t luc ky an d try the s teps wr itten on th is we bs ite===>> ?????? http://getitmust.blogspot.com/m

ClarkTommy63
Guest
ClarkTommy63
June 3, 2012 7:27 PM

m y bud dy’s moth er go t pa id $2 15 08 the p revious w eek. sh e is m aki ng mo ney on the i nterne t an d bo ught a $ 38 6500 h ouse. A ll s he did was g et f ortunate an d put in to w ork the ins tructions ex plain ed o n th is we b sit e===>> ?????? http://enternet-Job.blogspot.com

DillardCarl92
Guest
DillardCarl92
June 4, 2012 5:24 PM

m y c lassmate’s mom ma de $ 18460 l ast w eek. s he is ge tting p aid o n the l aptop a nd mo ved in a $ 571 600 house. A ll sh e did w as g et lu cky an d fo llow the t ips ma de cl ear o n th is si te ===>> ?????? http://workoverenternet.blogspot.com

IVAN3MAN_AT_LARGE
Member
IVAN3MAN_AT_LARGE
June 2, 2012 3:57 AM
wpDiscuz