Subscribe free to our newsletters via your
. 24/7 Space News .




STELLAR CHEMISTRY
30 Doradus: The Growing Tarantula Within
by Janet Anderson for Marshall Space Flight Center,
Huntsville, AL (SPX) Nov 15, 2011


X-ray Image of Tarantula Nebula. Credits: X-ray: NASA/CXC/PSU/L. Townsley et al.; Infrared: NASA/JPL/PSU/L. Townsley et al.

The star-forming region, 30 Doradus, is one of the largest located close to the Milky Way and is found in the neighboring galaxy Large Magellanic Cloud.

About 2,400 massive stars in the center of 30 Doradus, also known as the Tarantula Nebula, are producing intense radiation and powerful winds as they blow off material.

Multimillion-degree gas detected in X-rays (blue) by the Chandra X-ray Observatory comes from shock fronts - similar to sonic booms --formed by these stellar winds and by supernova explosions.

This hot gas carves out gigantic bubbles in the surrounding cooler gas and dust shown here in infrared emission from the Spitzer Space Telescope (orange).

30 Doradus is also known as an HII (pronounced "H-two") region, created when the radiation from hot, young stars strips away the electrons from neutral hydrogen atoms (HI) to form clouds of ionized hydrogen (HII).

It is the most massive and largest HII region in the Local Group of galaxies, which contains the Milky Way, Andromeda and about 30 other smaller galaxies including the two Magellanic Clouds.

Because of its proximity and size, 30 Doradus is an excellent target for studying the effects of massive stars on the evolution of an HII region.

The Tarantula Nebula is expanding, and researchers have recently published two studies that attempt to determine what drives this growth.

The most recent study concluded that the evolution and the large-scale structure of 30 Doradus is determined by the bubbles of hot, X-ray bright gas confined by surrounding gas, and that pressure from radiation generated by massive stars does not currently play an important role in shaping the overall structure.

A study published earlier in 2011 came to the opposite conclusion and argued that radiation pressure is more important than pressure from hot gas in driving the evolution of 30 Doradus, especially in the central regions near the massive stars.

More detailed analysis and deeper Chandra observations of 30 Doradus may help decide between these different ideas.

.


Related Links
Chandra at Harvard
Stellar Chemistry, The Universe And All Within It






Comment on this article via your Facebook, Yahoo, AOL, Hotmail login.

Share this article via these popular social media networks
del.icio.usdel.icio.us DiggDigg RedditReddit GoogleGoogle




Memory Foam Mattress Review
Newsletters :: SpaceDaily :: SpaceWar :: TerraDaily :: Energy Daily
XML Feeds :: Space News :: Earth News :: War News :: Solar Energy News





STELLAR CHEMISTRY
Discovery of 2 types of neutron stars points to 2 different classes of supernovae
Southampton UK (SPX) Nov 11, 2011
Astronomers at the universities of Southampton and Oxford have found evidence that neutron stars, which are produced when massive stars explode as supernovae, actually come in two distinct varieties. Their finding also suggests that each variety is produced by a different kind of supernova event. Neutron stars are the last stage in the evolution of many massive stars. They represent the mo ... read more


STELLAR CHEMISTRY
Ancient Lunar Dynamo May Explain Magnetized Moon Rocks

Ancient Lunar Dynamo May Explain Magnetized Moon Rocks

Lunar Probe to search for water on Moon

Subtly Shaded Map of Moon Reveals Titanium Treasure Troves

STELLAR CHEMISTRY
'Frustration' in Europe over joint Mars probe: NASA

NASA readies launch of 'dream machine' to Mars

Contact with Russian Mars probe 'unlikely' - expert

Mars explorers will include women, experts say

STELLAR CHEMISTRY
Voyager 2 Completes Switch to Backup Thruster Set

Romanian accused of hacking NASA servers arrested

Singapore family books $1 million Virgin space flight

International consensus on joint space exploration

STELLAR CHEMISTRY
China completes second space docking

China sets up management body for orbiting space lab

Second Tiangong-1 And Shenzhou-8 docking to face light interference

Made-in-Chengdu to help Shenzhou spacecraft return

STELLAR CHEMISTRY
Soyuz TMA-22 manned transportation spacecraft launched towards ISS

New Crew Launches to Join Expedition 29

Russia sends astronauts back to space after mishaps

Russia launches three astronauts for space station

STELLAR CHEMISTRY
Air Force Opens Door to Rocket Launch Competition

International Launch Services and Eutelsat Announce Launch of the W3D Satellite in 2013

ILS and Eutelsat Announce Launch of the W3D Satellite in 2013

The second Soyuz launcher's Fregat upper stage is readied for flight

STELLAR CHEMISTRY
Giant planet ejected from the solar system

Three New Planets and a Mystery Object Discovered Outside Our Solar System

Dwarf planet sized up accurately as it blocks light of faint star

Herschel Finds Oceans of Water in Disk of Nearby Star

STELLAR CHEMISTRY
Kindle Fire shipping to mixed reviews

Firm makes iPhone Geiger counter for worried Japanese

Ballmer says "Windows Era" everlasting

Custom glass bending




The content herein, unless otherwise known to be public domain, are Copyright 1995-2014 - Space Media Network. AFP, UPI and IANS news wire stories are copyright Agence France-Presse, United Press International and Indo-Asia News Service. ESA Portal Reports are copyright European Space Agency. All NASA sourced material is public domain. Additional copyrights may apply in whole or part to other bona fide parties. Advertising does not imply endorsement,agreement or approval of any opinions, statements or information provided by Space Media Network on any Web page published or hosted by Space Media Network. Privacy Statement