Science Current Events | Science News | Brightsurf.com
 

Black holes, galaxies young and old visible in massive mapping of the night sky

October 04, 2007
Pitt researcher part of core group behind survey of 10 billion years

PITTSBURGH-Color images documenting the past 10 billion years of galactic evolution were distributed online this week as part of the first public release of data from a massive project to map a distant region of the universe that combines the efforts of nearly 100 researchers from around the world, including the University of Pittsburgh.

Researchers in the All-wavelength Extended Groth Strip International Survey, or AEGIS, observed the same small region of sky using all available wavelengths of the electromagnetic spectrum--from X-rays to ultraviolet, visible, infrared, and radio waves. The survey focused on the Extended Groth Strip, an area the width of four full moons near the "handle" of the Big Dipper constellation. Four color images from four different satellite telescopes, as well as numerous data catalogs tabulating the properties of and distances to tens of thousands of galaxies, are now available on both the AEGIS Web site and Google Sky, a downloadable program that allows home computer users to explore these distant galaxies up close and in sharp detail.

Pitt physics and astronomy professor Jeffrey Newman is a key member of the AEGIS project's core team, the Deep Extragalactic Evolutionary Probe, or DEEP2 team. That team measured optical spectra-detailed breakdowns of the amount of light of a given color we see--for 50,000 galaxies, including 14,000 galaxies in the Extended Groth Strip. These spectra tie together all of the AEGIS datasets by allowing the team to determine each galaxy's distance from Earth. Once the distance is known, astronomers know how far back in time light left a galaxy and, thus, its age. The most distant galaxies in the survey-up to 9 billion light years away-appear as they were only a few billion years after the Big Bang.

Newman then worked directly with Google's Pittsburgh office to convert data from AEGIS into color images for Google Sky and share the information with the general public. Google Sky users can view and explore the Groth Strip in ultraviolet, visible, infrared, or X-ray light--or combine perspectives. "Each wavelength provides unique information about the characteristics of distant galaxies," Newman said.

Newman also worked on the team that created the most detailed of the four color images being released: A visible-light mosaic of 63 separate snapshots from the Hubble Space Telescope. It is the largest unbroken color mosaic ever made with Hubble images and provides images of approximately 50,000 faraway galaxies, including infant and adolescent galaxies just taking on their mature forms.

AEGIS' second image shows the same galaxies through the ultraviolet eyes of NASA's Galaxy Evolution Explorer (GALEX). Young stars produce ultraviolet light in abundance; GALEX brightness therefore provides a measure of the rate at which each galaxy is forming stars. Galaxies that contain relatively few young stars or are obscured by dust or intergalactic gas will appear redder in the GALEX image.

The brightness of galaxies in the third image, taken with the Infrared Array Camera on NASA's Spitzer Space Telescope, is closely related to the total amount of stars they have formed. The colors of a galaxy as seen through infrared eyes reveal information on both its contents (stars and dust) and its distance from us.

The fourth image, produced with data from NASA's Chandra X-ray Observatory, reveals the highly energetic X-ray radiation produced when gas spirals into a supermassive black hole, like those believed to lie at the center of almost every galaxy. Many of the X-ray-emitting objects lie buried within otherwise normal-looking galaxies. In the X-ray images, the bluest objects are the ones most obscured by gas within their host galaxies.

University of Pittsburgh


Related Galaxy Current Events and Galaxy News Articles


Unexpectedly little black-hole monsters rapidly suck up surrounding matter
Using the Subaru Telescope, researchers at the Special Astrophysical Observatory in Russia and Kyoto University in Japan have found evidence that enigmatic objects in nearby galaxies - called ultra-luminous X-ray sources (ULXs) - exhibit strong outflows that are created as matter falls onto their black holes at unexpectedly high rates.

Precise ages of largest number of stars hosting planets ever measured
A new study of 33 Kepler stars with solar-like oscillations to be published in Monthly Notices of the Royal Astronomical Society.

ALMA detects carbon 'smog' permeating interstellar atmospheres of early galaxies
Astronomers study the elements scattered between the stars to learn about the internal workings of galaxies, their motion and chemistry.

Discovering a new stage in the galactic lifecycle
On its own, dust seems fairly unremarkable. However, by observing the clouds of gas and dust within a galaxy, astronomers can determine important information about the history of star formation and the evolution of galaxies.

Giant galaxy is still growing
Astronomers expect that galaxies grow by swallowing smaller galaxies.

Astronomers discover more than 800 dark galaxies in the famous Coma Cluster
A group of researchers from the Stony Brook University (the State University of New York) and the National Astronomical Observatory of Japan has discovered 854 "ultra dark galaxies" in the Coma Cluster by analyzing archival data from the Subaru Telescope.

Cardiac device wearers should keep distance from smartphones
Cardiac device wearers should keep a safe distance from smartphones to avoid unwanted painful shocks or pauses in function, reveals research presented today at EHRA EUROPACE -- CARDIOSTIM 2015 by Dr. Carsten Lennerz, first author and cardiology resident in the Clinic for Heart and Circulatory Diseases, German Heart Centre, Munich, Germany.

Hubble views a bizarre cosmic quartet
This new NASA/ESA Hubble Space Telescope image shows a gathering of four cosmic companions. This quartet forms part of a group of galaxies known as the Hickson Compact Group 16, or HCG 16 -- a galaxy group bursting with dramatic star formation, tidal tails, galactic mergers and black holes.

Magnetic field discovery gives clues to galaxy-formation processes
Astronomers making a detailed, multi-telescope study of a nearby galaxy have discovered a magnetic field coiled around the galaxy's main spiral arm.

ALMA weighs supermassive black hole at center of distant spiral galaxy
Supermassive black holes lurk at the center of every large galaxy. These cosmic behemoths can be millions to billions of times more massive than the Sun.
More Galaxy Current Events and Galaxy News Articles

Galaxy: Mapping the Cosmos

Galaxy: Mapping the Cosmos
by James Geach (Author)


Each night, we are able to gaze up at the night sky and look at the thousands of stars that stretch to the end of our individual horizons. But the stars we see are only those that make up our own Milky Way galaxy—but one of hundreds of billions in the whole of the universe, each separated  by inconceivably huge tracts of empty space. In this book, astronomer James Geach tells the rich stories of both the evolution of galaxies and our ability to observe them, offering a fascinating history of how we’ve come to realize humanity’s tiny place in the vast universe.
           
Taking us on a compelling tour of the state-of-the-art science involved in mapping the infinite, Geach offers a first-hand account of both the science itself and how it is done, describing what...

The Ultimate Hitchhiker's Guide to the Galaxy

The Ultimate Hitchhiker's Guide to the Galaxy
by Douglas Adams (Author), Neil Gaiman (Introduction)


At last in paperback in one complete volume, here are the five classic novels from Douglas Adams’s beloved Hitchiker series.

The Hitchhiker’s Guide to the Galaxy
Seconds before the Earth is demolished for a galactic freeway, Arthur Dent is saved by Ford Prefect, a researcher for the revised Guide. Together they stick out their thumbs to the stars and begin a wild journey through time and space.

The Restaurant at the End of the Universe
Facing annihilation at the hands of warmongers is a curious time to crave tea. It could only happen to the cosmically displaced Arthur Dent and his comrades as they hurtle across the galaxy in a desperate search for a place to eat.

Life, the Universe and Everything
The unhappy inhabitants of planet Krikkit are sick of...

Galaxies

Galaxies
by Timothy Ferris (Author)


Beyond the Milky Way and toward infinity, Timothy Ferris navigates an exploration of the universe, guided by stars and galaxies that have been photographed through telescopes at the greatest observatories in the world. The book celebrates the wonder and the power of the cosmos in these photographs, which take you through silvery star clusters and vast red, exploding nebulae toward blue quasars 15 billion light years away. Revealing not only the ingredients of our own galaxy, the Milky Way, Ferris' vivid text also visits local galaxies, such as the Magellanic Clouds, the Andromeda, and the Sculptor and Fornax dwarves. The author then proceeds to discuss the elliptical, spiral and even violent aspects of galaxies, concluding with an examination of cosmology, which adresses such subjects as...

The Hitchhiker's Guide to the Galaxy

The Hitchhiker's Guide to the Galaxy
by Douglas Adams (Author)


"IRRESISTIBLE!"
--The Boston Globe
Seconds before the Earth is demolished to make way for a galactic freeway, Arthur Dent is plucked off the planet by his friend Ford Prefect, a researcher for the revised edition of The Hitchhiker's Guide to the Galaxy who, for the last fifteen years, has been posing as an out-of-work actor.
Together this dynamic pair begin a journey through space aided by quotes from The Hitchhiker's Guide ("A towel is about the most massively useful thing an interstellar hitchhiker can have") and a galaxy-full of fellow travelers: Zaphod Beeblebrox--the two-headed, three-armed ex-hippie and totally out-to-lunch president of the galaxy; Trillian, Zaphod's girlfriend (formally Tricia McMillan), whom Arthur tried to pick up at a cocktail party once upon a time...

Galaxies

Galaxies
by Seymour Simon (Author)


This close-up look at our own Milky Way and other enormous clusters of stars describes the many different types of galaxies, how they were formed, and how they got their different shapes. "A dazzling photo-essay."--School Library Journal.

Galaxy Formation and Evolution

Galaxy Formation and Evolution
by Houjun Mo (Author), Frank van den Bosch (Author), Simon White (Author)


The rapidly expanding field of galaxy formation lies at the interface between astronomy, particle physics, and cosmology. Covering diverse topics from these disciplines, all of which are needed to understand how galaxies form and evolve, this book is ideal for researchers entering the field. Individual chapters explore the evolution of the Universe as a whole and its particle and radiation content; linear and nonlinear growth of cosmic structure; processes affecting the gaseous and dark matter components of galaxies and their stellar populations; the formation of spiral and elliptical galaxies; central supermassive black holes and the activity associated with them; galaxy interactions; and the intergalactic medium. Emphasizing both observational and theoretical aspects, this book provides...

GALAXY S6: Samsung Galaxy S6 Unofficial User Guide - Discover How To Use Galaxy S6, Easy User Manual, Plus Advanced Tips And Tricks! (S6 Edge, Android, Smartphone)

GALAXY S6: Samsung Galaxy S6 Unofficial User Guide - Discover How To Use Galaxy S6, Easy User Manual, Plus Advanced Tips And Tricks! (S6 Edge, Android, Smartphone)


GALAXY S6

Samsung Galaxy S6 Unofficial User Guide – Discover How To Use Galaxy S6, Easy User Manual, Plus Advanced Tips And Tricks!

The vast majority of people are finding it difficult to traverse the widely varying terrains of modern technology. Even as the vast majority of technology, whether smart phones or tablets, is shifting towards touch based interfaces, the individual features of each device in today’s modern day and age can be difficult to decipher and use easily.

In recent times, the Samsung Galaxy Series has started to be hailed as the flagship smart phone, despite heavy competition from smart phones from competitors such as the iPhone and the HTC One. With the launch of the new S6, more and more people are looking to buy this...

GALAXY S6: Samsung Galaxy S6 Unofficial User Guide: Software, Apps, Hardware (Android, iphone 6, Apple Watch, Hacking, Android Programming, tablet, Computer programming)

GALAXY S6: Samsung Galaxy S6 Unofficial User Guide: Software, Apps, Hardware (Android, iphone 6, Apple Watch, Hacking, Android Programming, tablet, Computer programming)


***SPECIAL OFFER - INCLUDES FREE GIFT WORTH $9.99***
Amazon #1 Best Seller - Download it Now!

Have you ever thought that your "smart"phone is smarter that you?
Do you think you are using your galaxy s6 to it's fullest?

By Reading Galaxy S6 Unofficial User Guide, you will learn:
Fresh new updates for your galaxy s6Top app and game selection by the authorHow to utilize your Camera to its fullest so that you can take yourself a best selfie that you've ever took before!How you can dramatically increase your productivity by features in your galaxy s6 phoneAdvanced Samsung Galaxy s6 Tips and Ticks
So what are you waiting for? Don't you want to use your "Smart"phone to it's maximum potential?

Scroll up, and Click Buy now with...

A Galaxy To Conquer: (The Human Chronicles Saga Book #8

A Galaxy To Conquer: (The Human Chronicles Saga Book #8
by Harris Publications, Inc.



From international bestselling Science Fiction author T.R. Harris comes the exciting
Book #8 in The Human Chronicles Saga -- A Galaxy to Conquer.

Adam Cain is an Alien with an Attitude...

As all the great forces in the galaxy gather for one final, epic battle to determine who will rule the Milky Way, massive star fleets from the Juireans and the Humans converge on ground-zero -- the Kracori homeworld of Elision. Against such overwhelming firepower, it's a given that Elision will be destroyed -- unless the Kracori and their reluctant allies, the Klin, can mount a surprise end-around defense of their planet. At stake in this galactic free-for-all is nothing less than the survival of the all the species involved. Fail ... and your entire race dies as...

The Galaxy Zack Collection: A Stellar Four-Book Boxed Set: Hello, Nebulon!; Journey to Juno; The Prehistoric Planet; Monsters in Space!

The Galaxy Zack Collection: A Stellar Four-Book Boxed Set: Hello, Nebulon!; Journey to Juno; The Prehistoric Planet; Monsters in Space!
by Ray O'Ryan (Author), Colin Jack (Illustrator)


The first four Galaxy Zack books are now available in one stellar boxed set!

Planet hop with Zack Nelson on his galactic adventures as he moves from Earth to Nebulon in the year 2120, explores a newly discovered planet, helps a dinosaur get back to its prehistoric home, and befriends a space monster!

Included in this out-of-this-world collection are Hello, Nebulon!, Journey to Juno, The Prehistoric Planet, and Monsters in Space! Beginning readers are sure to love these chapter books that are packed with cool futuristic adventures.

© 2015 BrightSurf.com