Detected spiral galaxies appear the beginnings of the universe

Detected spiral galaxies appear the beginnings of the universe

galaxy and dwarf galaxy BX442 parallel (upper right).
the first time, astronomers observed a spiral galaxy in the early stages of the universe, the billions of years ago when many other spiral galaxies formed. In a report published today 19 recently, astronomers say they have discovered bearing number BX442 galaxies using the Hubble telescope to record images of distant galaxies nearly 300 during early universe to the study of their characteristics. BX442 was observed galaxies in a way we position 3 billion light years after the Big Bang.

Alice Shapley, associate professor of physics and astronomy at the University of California, Los Angeles (UCLA) study co-author, said: "When you go back to the time of the early universe, galaxies look very fancy, agglomerated, irregular and asymmetric. Most galaxies looks like the old carriage jam on each other. And the first thought is why our galaxy BX442 is different and so beautiful? "

The galaxies in the universe on now divided into several types, including spiral-shaped (as typical of our galaxy) is rotating plates of stars and gas in which new stars will form and elliptical form which contains and the older stars redder, moving in random directions. The mixing of the structure of galaxies in the early stages of the universe is a pretty Program is different, with greater diversity and asymmetry rate of the higher galaxies, Shapley said.
< br /> "The fact that the existence of the galaxy BX442 is a very surprising thing," said David Law, a postdoctoral fellow at the Institute astronomy and astrophysics at the University of Toronto can Dunlap cum author said. "The current knowledge is that 'grand design' of spiral galaxies does not exist in the early history of the universe." Grand Design here means the galaxy was formed complete with spiral arms are clearly defined.

BX442 galaxy is quite large compared to other galaxies in the early of the universe and only about 30 galaxies are analyzed Shapley Law and has a magnitude equivalent to the BX442.

To get more insight into the unique shape of the BX442, Law and Shapley has to the telescope WM Keck atop Mauna Kea volcano in Hawaii and spectrographs using OSITRIS by James Larkin, a professor of physics and astronomy at UCLA manufacturing, to observe. They studied the spectrum from 3600 points inside and around BX442 in order to collect the valuable information, allowing them to determine it really is a spiral galaxy is spinning and verify whether there are 2 natural ability line galaxies appear in the recorded image.

Shapley said: "At first we thought this might be an illusion and perhaps we are being deceived image. But what we found when recorded spectrum of the galaxy is the spiral arms BX442 really belong to it. It's not an illusion. " In addition, Law and Shapley also find evidence of a supermassive black hole at the center of the galaxy, it likely plays an important role in the evolution of BX442.

In star looks BX442 galaxies popular today but very rare in the past?

Law and Shapley said that the answer may be related to the coexistence of a dwarf galaxy (natural small galaxy with only a few billion stars) that OSITRIS spectrometer detected as a clean circle located at the top right of the image and the interaction of forces between them. Included with the simulation calculations by Charlotte Christensen - postdoctoral fellow at the University of Arizona made, Shapley said ultimately small galaxies tend to merge with the BX442.

"BX442 looks like a nearby galaxy, but in the early universe, the galaxies clash occurred more often, "she said. "Gases emitted from intergalactic regions and to complement the house is formed at a rate much higher than today; the black hole faster development. Space humdrum now than with earlier times. "

Currently, Law and Shapley continued study of BX442. The understanding of its natural characteristics will reveal many mysteries of our galaxy. Last year, another study published in the journal Nature that the spiral shape of our galaxy could originate from the interaction of a dwarf galaxy called Sagittarius. Therefore, the BX442 is a unique opportunity to study this process when it re-forms is one of the links between the galaxies in the early chaos of the universe and the stable spiral galaxies today.

Order: Gizmag



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