Space

June 5, 2013

NASA’s Spitzer sees Milky Wayís blooming countryside

New views from NASA’s Spitzer Space Telescope show blooming stars in our Milky Way galaxy’s more barren territories, far from its crowded core.

The images are part of the Galactic Legacy Infrared Mid-Plane Survey Extraordinaire (Glimpse 360) project, which is mapping the celestial topography of our galaxy. The map and a full, 360-degree view of the Milky Way plane will be available later this year. Anyone with a computer may view the Glimpse images and help catalog features.

We live in a spiral collection of stars that is mostly flat, like a vinyl record, but it has a slight warp. Our solar system is located about two-thirds of the way out from the Milky Way’s center, in the Orion Spur, an offshoot of the Perseus spiral arm. Spitzer’s infrared observations are allowing researchers to map the shape of the galaxy and its warp with the most precision yet.

While Spitzer and other telescopes have created mosaics of the galaxy’s plane looking in the direction of its center before, the region behind us, with its sparse stars and dark skies, is less charted.

“We sometimes call this flyover country,” said Barbara Whitney, an astronomer from the University of Wisconsin at Madison, who uses Spitzer to study young stars. “We are finding all sorts of new star formation in the lesser-known areas at the outer edges of the galaxy.”

Whitney and colleagues are using the data to find new sites of youthful stars. For example, they spotted an area near Canis Major with 30 or more young stars sprouting jets of material, an early phase in their lives. So far, the researchers have identified 163 regions containing these jets in the Glimpse 360 data, with some of the young stars highly clustered in packs and others standing alone.

Robert Benjamin is leading a University of Wisconsin team that uses Spitzer to more carefully pinpoint the distances to stars in the galaxy’s hinterlands. The astronomers have noticed a distinct and rapid drop-off of red giants, a type of older star, at the edge of the galaxy. They are using this information to map the structure of the warp in the galaxy’s disk.

“With Spitzer, we can see out to the edge of the galaxy better than before,” said Robert Benjamin of the University of Wisconsin, who presented the results Wednesday at the 222nd meeting of the American Astronomical Society in Indianapolis. “We are hoping this will yield some new surprises.”

Thanks to Spitzer’s infrared instruments, astronomers are capturing improved images of those remote stellar lands. Data from NASA’s Wide-field Infrared Survey Explorer (WISE) are helping fill in gaps in the areas Spitzer did not cover. WISE was designed to survey the entire sky twice in infrared light, completing the job in early 2011, while Spitzer continues to probe the infrared sky in more detail. The results are helping to canvas our galaxy, filling in blanks in the outer expanses where not much is known.
Glimpse 360 already has mapped 130 degrees of the sky around the galactic center.

Four new views from the area looking away from the galactic center are online at http://go.nasa.gov/ZtA1Sn.

Members of the public continue scouring images from earlier Glimpse data releases in search of cosmic bubbles indicative of hot, massive stars. Astronomers’ knowledge of how massive stars influence the formation of other stars is benefitting from this citizen science activity, called The Milky Way Project.

For instance, volunteers identified a striking multiple bubble structure in a star-forming region called W39. Follow up work by the researchers showed the smaller bubbles were spawned by a larger bubble that had been carved out by massive stars.

“This crowdsourcing approach really works,” said Charles Kerton of Iowa State University at Ames, who also presented results. “We are examining more of the hierarchical bubbles identified by the volunteers to understand the prevalence of triggered star formation in our galaxy.”

For more information about the Milky Way project and to learn how to participate, visit http://www.milkywayproject.org.




All of this week's top headlines to your email every Friday.


 
 

 
Image courtesy of U.S. Bureau of Reclamation

Satellite study reveals parched U.S. West using up underground water

Image courtesy of U.S. Bureau of Reclamation The Colorado River Basin lost nearly 53 million acre feet of freshwater over the past nine years, according to a new study based on data from NASA’s GRACE mission. This is almost d...
 
 

NASA selects contract for mission support services at Ames

NASA has selected Wyle Laboratories, Inc., Houston, to support NASA’s flight programs and mission projects, providing support for multiple sustained project management, research and technology development capabilities that encompass all phases of mission and project lifecycles at the agency’s Ames Research Center in Moffett Field, Calif. The cost-plus-fixed-fee hybrid contract has a...
 
 
NASA, ESA, G. Bacon (STScI) and N. Madhusudhan (UC) image

Hubble finds three surprisingly dry exoplanets

NASA, ESA, G. Bacon (STScI) and N. Madhusudhan (UC) image This is an artistic illustration of the gas giant planet HD 209458b in the constellation Pegasus. To the surprise of astronomers, they have found much less water vapor i...
 

 
Air Force photograph

Budget cuts, growing threats affect space operations

Air Force photograph The Advanced Extremely High Frequency, or AEHF, system is a joint service satellite communications system that provides survivable, global, secure, protected and jam-resistant communications for high-priori...
 
 

NASA partners punctuate summer with spacecraft development advances

Spacecraft and rocket development is on pace this summer for NASA’s aerospace industry partners for the agency’s Commercial Crew Program as they progress through systems testing, review boards and quarterly sessions under their† Space Act Agreements with the agency. NASA engineers and specialists continue their review of the progress as the agency and partners move...
 
 

NASA seeks proposals for commercial Mars data relay satellites

NASA has issued a Request for Information to investigate the possibility of using commercial Mars-orbiting satellites to provide telecommunications capabilities for future robotic missions to the Red Planet. We are looking to broaden participation in the exploration of Mars to include new models for government and commercial partnerships, said John Grunsfeld, associate administrator of NASAR...
 




0 Comments


Be the first to comment!


Leave a Reply

Your email address will not be published. Required fields are marked *

You may use these HTML tags and attributes: <a href="" title=""> <abbr title=""> <acronym title=""> <b> <blockquote cite=""> <cite> <code> <del datetime=""> <em> <i> <q cite=""> <strike> <strong>