G299.2-2.9, a middle-aged supernova remnant

Oct 13, 2011
Credits: X-ray: NASA/CXC/U.Texas/S. Park et al, ROSAT; Infrared: 2MASS/UMass/IPAC-Caltech/NASA/NSF

(PhysOrg.com) -- G299.2-2.9 is an intriguing supernova remnant found about 16,000 light years away in the Milky Way galaxy. Evidence points to G299.2-2.9 being the remains of a Type Ia supernova, where a white dwarf has grown sufficiently massive to cause a thermonuclear explosion.

Because it is older than most caused by these explosions, at an age of about 4,500 years, G299.2-2.9 provides astronomers with an excellent opportunity to study how these objects evolve over time. It also provides a probe of the explosion that produced this structure.

This composite image shows G299.2-2.9 in X-ray light from Chandra and the ROSAT satellite, in orange, that has been overlaid on an infrared image from the Two Micron All-Sky Survey, or 2MASS. The faint X-ray emission from the inner region reveals relatively large amounts of iron and silicon, as expected for a remnant of a Type Ia supernova. The outer shell of the remnant is complex, with at least a double shell structure. Typically, such a complex outer shell is associated with a star that has exploded into space where gas and dust are not uniformly distributed.

Since most theories to explain Type Ia supernovas assume they go off in a uniform environment, detailed studies of this complicated outer shell should help astronomers improve their understanding of the environments where these explosions occur. It is very important to understand the details of Type Ia explosions because astronomers use them as cosmic mile markers to measure the accelerated expansion of the universe and study dark energy. The discovery of this accelerated expansion in the late 1990s led to the recent award of the .

Explore further: Young binary star system may form planets with weird and wild orbits

Related Stories

Supernova explosions stay in shape

Dec 17, 2009

At a very early age, children learn how to classify objects according to their shape. Now, new research suggests studying the shape of the aftermath of supernovas may allow astronomers to do the same.

Supernova remnant is an unusual suspect

Jun 09, 2009

A new image from NASA's Chandra X-ray Observatory shows a supernova remnant with a different look. This object, known as SNR 0104-72.3 (SNR 0104 for short), is in the Small Magellanic Cloud, a small neighboring ...

Action replay of powerful stellar explosion

Mar 20, 2008

Astronomers have made the best ever determination of the power of a supernova explosion that was visible from Earth long ago. By observing the remnant of a supernova and a light echo from the initial outburst, ...

Unusual shape of exploded star puzzles scientists

Jun 17, 2009

Penn State astronomers have used NASA's Chandra X-ray Observatory to produce a new image of a ghostly exploded star with an unusual shape in a galaxy near the Milky Way. Astronomers think the object may be ...

Supernova Remnants Dance in the LMC

Jan 10, 2008

The Gemini South Multi-Object Spectograph (GMOS) recently captured a dramatic image of a vast cloud complex named DEM L316 located in the Large Magellanic Cloud. The peanut-shaped nebula appears to be a single ...

Team finds Type Ia supernovae parents

Aug 11, 2011

Type Ia supernovae are violent stellar explosions whose brightness is used to determine distances in the universe. Observing these objects to billions of light years away has led to the discovery that the universe is expanding ...

Recommended for you

Evidence of a local hot bubble carved by a supernova

14 hours ago

I spent this past weekend backpacking in Rocky Mountain National Park, where although the snow-swept peaks and the dangerously close wildlife were staggering, the night sky stood in triumph. Without a fire, ...

Astronomers measure weight of galaxies, expansion of universe

22 hours ago

Astronomers at the University of British Columbia have collaborated with international researchers to calculate the precise mass of the Milky Way and Andromeda galaxies, dispelling the notion that the two galaxies have similar ...

Mysterious molecules in space

Jul 29, 2014

Over the vast, empty reaches of interstellar space, countless small molecules tumble quietly though the cold vacuum. Forged in the fusion furnaces of ancient stars and ejected into space when those stars ...

Comet Jacques makes a 'questionable' appearance

Jul 28, 2014

What an awesome photo! Italian amateur astronomer Rolando Ligustri nailed it earlier today using a remote telescope in New Mexico and wide-field 4-inch (106 mm) refractor. Currently the brightest comet in ...

User comments : 3

Adjust slider to filter visible comments by rank

Display comments: newest first

omatumr
2 / 5 (8) Oct 13, 2011
. . . a double shell structure . . . such a complex outer shell is associated with a star that has exploded into space where gas and dust are not uniformly distributed


Thanks for the intriguing story.

There is also "a double shell structure" of material orbiting the Sun.

The inner shell consists mostly of Fe, O, Ni, Si, S, Mg and Ca.

The outer shell consists mostly of H, He, C, and N.

Linked chemical and isotopic anomalies from these two shells

www.omatumr.com/D...Data.htm

Were the first hint that the Sun is the remains of a supernova

http://www.omatum...igin.htm

And neutron repulsion is the energy source

http://www.omatum...Data.htm

That sustains our lives and powers Earth's climate, the Sun and the cosmos [1,2].

1. Super-fluidity in the solar interior: Implications for solar eruptions and climate

http://arxiv.org/.../0501441

2. Neutron repulsion

http://arxiv.org/...2.1499v1

With kind regards,
Oliver K. Manuel

jmcanoy1860
5 / 5 (1) Oct 23, 2011
Hey, Oliver, after sodomizing your own children perhaps you could just explain 3 things for me.
1. Solar absorption spectra
2. Where you get the idea that there is matter comprised of 100% neutrons anywhere in the universe.
3. Where there is any evidence from someone other than yourself.
jmcanoy1860
5 / 5 (1) Oct 23, 2011
Actually, one more thing there Oli. What exactly is the time frame for the dissipation of condensed neutrons?