Featured Research

from universities, journals, and other organizations

Neutron Stars May Merge More Often Than Thought

Date:
December 11, 2003
Source:
Northwestern University
Summary:
A recent discovery of a double neutron-star system has helped to increase astronomers’ chances at collecting the information they need to better understand the black holes and neutron stars in our Galaxy.

EVANSTON, Ill. --- A recent discovery of a double neutron-star system has helped to increase astronomers’ chances at collecting the information they need to better understand the black holes and neutron stars in our Galaxy.

Related Articles


Neutron star pairs may merge and give off a burst of gravitational waves about six times more often than previously thought, scientists report in the Dec. 4 issue of the journal Nature. If so, the current generation of gravitational-wave detectors might be able to register such an event every year or two, rather than about once a decade -- the most optimistic prediction until now.

Gravitational waves were predicted by Einstein’s general theory of relativity. Astronomers have indirect evidence of their existence but have not yet detected them directly.

The revised estimate of the neutron-star merger rate springs from the discovery of a double neutron-star system, a pulsar called PSR J0737-3039 and its neutron-star companion, by a team of scientists from Italy, Australia, the United Kingdom and the United States using the 64-m CSIRO Parkes radio telescope in eastern Australia.

Vicky Kalogera, assistant professor of physics and astronomy at Northwestern University, is a member of the international team. She, along with her graduate student Chunglee Kim and colleague Duncan Lorimer from the University of Manchester, used the characteristics of the newly discovered pair of neutron stars to calculate how many more such pairs exist in our Galaxy. Next, they calculated that first-generation gravitational wave detectors, like LIGO in the United States, should be able to detect the merger of neutron stars once every year and a half.

“We know gravitational waves exist, but only from indirect evidence,” said Kalogera. “Once we can detect the gravitational waves from these merger events directly, we will have an amazing new window into the cosmos. We will learn a great deal more about relativity and the properties of astronomical objects such as neutron stars and black holes.”

Marta Burgay, a Ph.D. student at the University of Bologna in Italy is lead author on the Nature paper. Kalogera’s portion of the research was supported by the National Science Foundation’s gravitational physics program and the David and Lucile Packard Foundation.


Story Source:

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


Cite This Page:

Northwestern University. "Neutron Stars May Merge More Often Than Thought." ScienceDaily. ScienceDaily, 11 December 2003. <www.sciencedaily.com/releases/2003/12/031211074051.htm>.
Northwestern University. (2003, December 11). Neutron Stars May Merge More Often Than Thought. ScienceDaily. Retrieved April 21, 2015 from www.sciencedaily.com/releases/2003/12/031211074051.htm
Northwestern University. "Neutron Stars May Merge More Often Than Thought." ScienceDaily. www.sciencedaily.com/releases/2003/12/031211074051.htm (accessed April 21, 2015).

Share This


More From ScienceDaily



More Space & Time News

Tuesday, April 21, 2015

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Hubble Marks 25th Birthday as Successor Readies for Launch

Hubble Marks 25th Birthday as Successor Readies for Launch

AFP (Apr. 20, 2015) — With the Hubble Space Telescope celebrating its 25th anniversary on April 24, 2015, AFPTV takes a look at Hubble&apos;s control room and gets a sneak peek inside the space center assembling the James Webb Telescope - Hubble&apos;s successor. Duration: 02:52 Video provided by AFP
Powered by NewsLook.com
Rocket Science: Building And Testing The Space Launch System

Rocket Science: Building And Testing The Space Launch System

Newsy (Apr. 19, 2015) — NASA&apos;s new rocket system will eventually be the most powerful ever built by man, but there are a lot of moving parts to test first. Video provided by Newsy
Powered by NewsLook.com
2015 NASA Rover Challenge Underway in Alabama

2015 NASA Rover Challenge Underway in Alabama

Reuters - Light News Video Online (Apr. 19, 2015) — Teams face an uphill battle for fastest rover in this year&apos;s NASA Human Exploration Rover Challenge in Alabama. Julie Noce reports. Video provided by Reuters
Powered by NewsLook.com
International Space Station Captures SpaceX Dragon Spacecraft

International Space Station Captures SpaceX Dragon Spacecraft

Reuters - News Video Online (Apr. 17, 2015) — SpaceX&apos;s Dragon spacecraft reaches the International Space Station and is successfully captured by the station&apos;s robotic arm. Rough Cut (no reporter narration). Video provided by Reuters
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

 

Space & Time

Matter & Energy

Computers & Math

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