NASA's Chandra Suggests Rare Explosion Created Our Galaxy's Youngest Black Hole | Aero-News Network
Aero-News Network
RSS icon RSS feed
podcast icon MP3 podcast
Subscribe Aero-News e-mail Newsletter Subscribe

Airborne Unlimited -- Recent Daily Episodes

Episode Date

Monday

Tuesday

Wednesday

Thursday

Friday

Airborne On ANN

Airborne 02.08.16

Airborne 02.09.16

Airborne 02.10.16

Airborne 02.11.16

Airborne 02.12.16

Airborne Hi-Def On YouTube

Airborne 02.08.16

Airborne 02.09.16

Airborne 02.10.16

Airborne 02.11.16

Airborne 02.12.16

Mon, Feb 18, 2013

NASA's Chandra Suggests Rare Explosion Created Our Galaxy's Youngest Black Hole

Phenomenon About 26,000 Light Years From Earth

New data from NASA's Chandra X-ray Observatory suggest a highly distorted supernova remnant may contain the most recent black hole formed in the Milky Way galaxy. The remnant appears to be the product of a rare explosion in which matter is ejected at high speeds along the poles of a rotating star.

The remnant, called W49B, is about a thousand years old as seen from Earth and located about 26,000 light-years away. "W49B is the first of its kind to be discovered in the galaxy," said Laura Lopez, who led the study at the Massachusetts Institute of Technology. "It appears its parent star ended its life in a way that most others don't."

Usually when a massive star runs out of fuel, the central region of the star collapses, triggering a chain of events that quickly culminate in a supernova explosion. Most of these explosions are generally symmetrical, with the stellar material blasting away more or less evenly in all directions. However, in the W49B supernova, material near the poles of the doomed rotating star was ejected at a much higher speed than material emanating from its equator. Jets shooting away from the star's poles mainly shaped the supernova explosion and its aftermath.

The remnant now glows brightly in X-rays and other wavelengths, offering the evidence for a peculiar explosion. By tracing the distribution and amounts of different elements in the stellar debris field, researchers were able to compare the Chandra data to theoretical models of how a star explodes. For example, they found iron in only half of the remnant while other elements such as sulfur and silicon were spread throughout. This matches predictions for an asymmetric explosion. "In addition to its unusual signature of elements, W49B also is much more elongated and elliptical than most other remnants," said co-author Enrico Ramirez-Ruiz of the University of California at Santa Cruz. "This is seen in X-rays and several other wavelengths and points to an unusual demise for this star."

Because supernova explosions are not well understood, astronomers want to study extreme cases like the one that produced W49B. The relative proximity of W49B also makes it extremely useful for detailed study. The authors examined what sort of compact object the supernova explosion left behind. Most of the time, massive stars that collapse into supernovas leave a dense, spinning core called a neutron star. Astronomers often can detect neutron stars through their X-ray or radio pulses, although sometimes an X-ray source is seen without pulsations. A careful search of the Chandra data revealed no evidence for a neutron star. The lack of such evidence implies a black hole may have formed. "It's a bit circumstantial, but we have intriguing evidence the W49B supernova also created a black hole," said co-author Daniel Castro, also of MIT. "If that is the case, we have a rare opportunity to study a supernova responsible for creating a young black hole."

The new results on W49B, which were based on about two-and-a-half days of Chandra observing time, appear in a paper in Sunday's issue of the Astrophysical Journal. The other co-author was Sarah Pearson from the University of Copenhagen in Denmark.

(Image of highly distorted supernova remnant provided by NASA)

FMI: www.nasa.gov/chandra

Advertisement

More News

House Science Committee Approves Aviation R&D Bill

Authorizes Funding For The FAA's Research, Engineering, And Development Account Through 2019 The Science, Space, and Technology Committee on Thursday approved the FAA Leadership in>[...]

Airborne 02.12.16: NEW Mooney!, Not-So-Good GAMA Stats, DA40 Upgrades

Also: A350-1000 Final Assembly, Barnstorming: ATC Privatization, Lithium Issue, Boeing Cuts, Tillamook C-27, Sywell Aerodrome, Massive Airship Mooney International Corporation unve>[...]

Airborne 02.11.16: Drone #s Increase, Fokker D. VIII Replica, Gulfstream G500

Also: Albania Auction, Aero-Community: AEA!, 500 F-35 Hours, SeaPort Airlines, Maxcraft Avionics, Air Power Museum, Webb Space Telescope FAA Administrator Michael Huerta told a UAV>[...]

Airborne 02.12.16: NEW Mooney!, Not-So-Good GAMA Stats, DA40 Upgrades

Also: A350-1000 Final Assembly, Barnstorming: ATC Privatization, Lithium Issue, Boeing Cuts, Tillamook C-27, Sywell Aerodrome, Massive Airship Mooney International Corporation unve>[...]

ANN FAQ: View Aero-News YOUR Way ... The 'Headlines And Teasers' Option

Choose How YOU Want To View Your Aero News: Headlines And Teasers We're all pretty excited about the new website design here at ANN, but we HAVE heard from some of you that you lik>[...]

blog comments powered by Disqus



Advertisement

Advertisement

Podcasts

Advertisement

© 2007 - 2016 Web Development & Design by Pauli Systems, LC