Featured Research

from universities, journals, and other organizations

First RAVE Data Release Offers Clues To Milky Way Evolution

Date:
February 12, 2006
Source:
Johns Hopkins University
Summary:
Astronomers release first data collected as part of the Radial Velocity Experiment, an ambitious spectroscopic survey aimed at measuring the speed, temperature, surface gravity and composition of up to a million stars passing near the sun.

RAVE-ing in the Southern Sky. The red line divides the northern and southern equatorial hemispheres at declination = 0 degrees. The blue fields of view are part of the first data release from RAVE.
Credit: Image courtesy of Radial Velocity Experiment

An international team of astronomers released to the public the first data collected as part of the Radial Velocity Experiment, an ambitious spectroscopic survey aimed at measuring the speed, temperature, surface gravity and composition of up to a million stars passing near the sun.

Related Articles


The measurements, released at an astrophysics workshop at the Aspen Center for Physics in Colorado and available today online to other astronomers, includes examination of old "fossil" stars that were born when our Milky Way galaxy was in its infancy. Team members posit that such data may eventually provide evidence to back up theories that our galaxy has -- over time -- "cannibalized" other, smaller galaxies and is "digesting" them.

"Our research focuses on the oldest stars, and probes the earliest phases of the evolution of our home galaxy, the Milky Way," said Rosemary Wyse, a professor in the Henry A. Rowland Department of Physics and Astronomy in Johns Hopkins' Krieger School of Arts and Sciences and a member of the RAVE team. "The unprecedented sample available with RAVE will allow me -- and now, with the release of this data, others -- to test ideas of our origins laid out by various cosmological theories."

The team also includes members from the United States, Germany, Australia, Canada, the Netherlands, the United Kingdom, Slovenia, Italy, Switzerland and France.

The survey has been made possible by the unique capabilities of the "six-degree field" multi-object spectrograph on the 1.2-meter UK Schmidt Telescope of the Anglo-Australian Observatory, located at Siding Spring Observatory in New South Wales, Australia. This instrument is capable of obtaining spectroscopic information for as many as 150 stars at once, from an area of the sky equal to more than 150 times the area covered by the full moon.

"The data we are making public today is twice the sample size of any previous survey, and has extremely high quality," Wyse said. "Other astronomers can definitely use these data in their work. All they have to do is go to our Web site and download it."

The RAVE survey measures the velocities of stars along the line of sight, something that has previously been difficult to obtain for such large samples of stars. Data from RAVE's first year of operation consists of information from some 25,000 stars, including measurement of their brightness, color and motion across the sky.

"This data set will provide a unique resource for all astronomers working in the field of galactic evolution and, with our public data release, the astronomical community can participate in our endeavor," says Tomaz Zwitter of the Ljubljana University in Slovenia and project scientist of the RAVE survey. "This first sample by itself is already two times the size of the previous largest survey of stars near the sun."

Matthias Steinmetz, director of the Astrophysical Institute Potsdam, and leader of the RAVE collaboration, predicted that "the full RAVE survey will provide a vast resource of stellar motions and chemical abundances, allowing us to answer fundamental questions of the formation and evolution of our galaxy."

###

Funding for RAVE is provided by the National Science Foundation for Johns Hopkins, and by the national research councils of other team members' countries, as well as by private sources.

Related Web site: http://www.rave-survey.org


Story Source:

The above story is based on materials provided by Johns Hopkins University. Note: Materials may be edited for content and length.


Cite This Page:

Johns Hopkins University. "First RAVE Data Release Offers Clues To Milky Way Evolution." ScienceDaily. ScienceDaily, 12 February 2006. <www.sciencedaily.com/releases/2006/02/060212181916.htm>.
Johns Hopkins University. (2006, February 12). First RAVE Data Release Offers Clues To Milky Way Evolution. ScienceDaily. Retrieved October 30, 2014 from www.sciencedaily.com/releases/2006/02/060212181916.htm
Johns Hopkins University. "First RAVE Data Release Offers Clues To Milky Way Evolution." ScienceDaily. www.sciencedaily.com/releases/2006/02/060212181916.htm (accessed October 30, 2014).

Share This



More Health & Medicine News

Thursday, October 30, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Mind-Controlled Prosthetic Arm Restores Amputee Dexterity

Mind-Controlled Prosthetic Arm Restores Amputee Dexterity

Reuters - Innovations Video Online (Oct. 29, 2014) A Swedish amputee who became the first person to ever receive a brain controlled prosthetic arm is able to manipulate and handle delicate objects with an unprecedented level of dexterity. The device is connected directly to his bone, nerves and muscles, giving him the ability to control it with his thoughts. Matthew Stock reports. Video provided by Reuters
Powered by NewsLook.com
Google To Use Nanoparticles, Wearables To Detect Disease

Google To Use Nanoparticles, Wearables To Detect Disease

Newsy (Oct. 29, 2014) Google X wants to improve modern medicine with nanoparticles and a wearable device. It's all an attempt to tackle disease detection and prevention. Video provided by Newsy
Powered by NewsLook.com
Can Drinking Milk Lead To Early Death?

Can Drinking Milk Lead To Early Death?

Newsy (Oct. 29, 2014) Researchers in Sweden released a study showing heavy milk drinkers face an increased mortality risk from a variety of causes. Video provided by Newsy
Powered by NewsLook.com
Obama: The US Will Not 'run and Hide' From Ebola

Obama: The US Will Not 'run and Hide' From Ebola

AP (Oct. 29, 2014) Surrounded by health care workers in the White House East Room, President Barack Obama said the U.S. will likely see additional Ebola cases in the weeks ahead. But he said the nation can't seal itself off in the fight against the disease. (Oct. 29) Video provided by AP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Health & Medicine

Mind & Brain

Living & Well

In Other News

... from NewsDaily.com

Science News

Health News

    Environment News

    Technology News



    Save/Print:
    Share:

    Free Subscriptions


    Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

    Get Social & Mobile


    Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

    Have Feedback?


    Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
    Mobile: iPhone Android Web
    Follow: Facebook Twitter Google+
    Subscribe: RSS Feeds Email Newsletters
    Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins