Featured Research

from universities, journals, and other organizations

Pulsating dust cloud dynamics modeled

Date:
September 12, 2013
Source:
Springer Science+Business Media
Summary:
New research outlines a new design of spatio-temporal models of astrophysical plasmas. The birth of stars is an event that eludes intuitive understanding. It is the collapse of dense molecular clouds under their own weight that offers the best sites of star formation. Now, astronomers have proposed a new model for investigating molecular cloud fluctuations at sites of star formation and thus are able to study their pulsational dynamics.

The birth of stars is an event that eludes intuitive understanding. It is the collapse of dense molecular clouds under their own weight that offers the best sites of star formation. Now, Pralay Kumar Karmakar from the Department of Physics at Tezpur University, Assam province, India, and his colleague have proposed a new model for investigating molecular cloud fluctuations at sites of star formation and thus are able to study their pulsational dynamics, in a paper published in The European Physical Journal D.

Related Articles


Dust molecular clouds are a type of astrophysical plasmas, which are composed of a primordial soup of positively and negatively charged particles. Scientists have long known that these exhibit collective pulsating or wave-like behaviour. Both experimental observations via spacecraft, satellites, and sophisticated imaging detection systems have confirmed it. What is more, many theoretical models provide a simplified description of such observations. But the complex dynamics are still not clearly understood.

In particular, the pulsating dynamics of inhomogeneous molecular clouds that periodically undergo both self-gravitational contraction due to the weight of the massive dust grains, and electrostatic expansion resulting from the interaction of dust grains of the same electric charge, are captivating scientists.

Karmakar and Bhupen Borah designed a model for investigating the cloud fluctuations with charge-varying grains, as a function of weight and charge interaction (referred to as nonlinear gravito-electrostatic coupling). The principal factors they took into account include dust-charge fluctuations, relevant convective nonlinearities and all the complex collisional processes.

They then carried out a detailed shape analysis to characterise these clouds on the astrophysical scale. This approach helps to elucidate basic features of the collapse of clouds under their own weight, the formation and evolution of stars, galactic structures and other cluster-like astrophysical objects in diverse space and plasma environments.


Story Source:

The above story is based on materials provided by Springer Science+Business Media. Note: Materials may be edited for content and length.


Journal Reference:

  1. P. K. Karmakar, B. Borah. Nonlinear pulsational eigenmodes of a planar collisional dust molecular cloud with grain-charge fluctuation. The European Physical Journal D, 2013; 67 (9) DOI: 10.1140/epjd/e2013-40165-7

Cite This Page:

Springer Science+Business Media. "Pulsating dust cloud dynamics modeled." ScienceDaily. ScienceDaily, 12 September 2013. <www.sciencedaily.com/releases/2013/09/130912092551.htm>.
Springer Science+Business Media. (2013, September 12). Pulsating dust cloud dynamics modeled. ScienceDaily. Retrieved January 25, 2015 from www.sciencedaily.com/releases/2013/09/130912092551.htm
Springer Science+Business Media. "Pulsating dust cloud dynamics modeled." ScienceDaily. www.sciencedaily.com/releases/2013/09/130912092551.htm (accessed January 25, 2015).

Share This


More From ScienceDaily



More Space & Time News

Sunday, January 25, 2015

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Rosetta Captures Stunning Views, Diverse Data Of Comet 67P

Rosetta Captures Stunning Views, Diverse Data Of Comet 67P

Newsy (Jan. 23, 2015) The first images of the European Space Agency&apos;s Rosetta probe comet orbit could provide clues about its origin and how it got its unique shape. Video provided by Newsy
Powered by NewsLook.com
New Planets Could Be Lurking Far Beyond Neptune

New Planets Could Be Lurking Far Beyond Neptune

Newsy (Jan. 21, 2015) Scientists say planets located beyond Neptune could be altering the orbits of objects in the farthest reaches of our solar system. Video provided by Newsy
Powered by NewsLook.com
130,000 Pages Of UFO Investigation Docs Now Online

130,000 Pages Of UFO Investigation Docs Now Online

Newsy (Jan. 20, 2015) "UFO enthusiast" John Greenewald says he&apos;s spent 20 years collecting these docs, and believes there&apos;s a cover-up going on. Video provided by Newsy
Powered by NewsLook.com
US Navy Satellite Blasts Off

US Navy Satellite Blasts Off

Reuters - News Video Online (Jan. 20, 2015) A rocket carrying a new U.S. navy satellite that&apos;s designed to improve communications for forces on the move, successfully lifts off from Florida. Yiming Woo reports. 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