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Saturday, March 1, 2014

Supernova in Galaxy M82

On January 21, 2014, a group of astronomy students spotted an extragalactic supernova in the galaxy known as M82, the famous nearby irregular galaxy is located in the constellation of Ursa Major. It peaked at magnitude 10.5 during the first week of February, but as of February 28th, it was still quite visible in amateur scopes about magnitude 11.7.

The discovery of this extragalactic supernova will provide an opportunity for students and amateur astronomers to study such an event utilizing remote robotic telescopes for astronomy research and education. Students and amateur astronomers could take sequential images of the galaxy over a period of nights to compare the supernova's change in magnitude.

Before and after photos of the galaxy M82 showing the appearance of a  brand new 11.7 magnitude supernova.  Images by E. Guido, N. Howes, M. Nicolini
Before and after photos of the galaxy M82 showing the appearance of a  brand new 11.7 magnitude supernova. 
Image by E. Guido, N. Howes, M. Nicolini

Spectra showed it to be a Type Ia supernova  (an exploded white dwarf) with debris originally expanding at up to 20,000 kilometers per second. It is significantly dimmed and reddened by dust in M82 along our line of sight. By one estimate, it would be two magnitudes brighter if we were seeing it in the clear.

< Because this new supernova is currently at magnitude +11 to +12, it's definitely not visible with the naked eye. You’ll need a 4-inch telescope at least to be able to see it. That said, at 12 million light-years away, this is (at the moment) the brightest, closest supernova since SN 1993 J exploded in neighboring galaxy M81 approximately 21 years ago. M81 and M82, along with NGC 3077, form a close-knit interacting group.

M82 is a bright, striking edge-on spiral galaxy bright enough to see in binoculars. Known as the Cigar or Starburst Galaxy because of its shape and a large, active starburst region in its core, it’s only 12 million light-years from Earth and home to two previous supernovae in 2004 and 2008. Neither of those came anywhere close to the being as bright as the discovery, and it’s very possible the new object will become brighter yet.

Image: John Strong - T24 M82 with SN 2014J
Image: John Strong - T24 M82 with SN 2014J

The supernova occurred when the dwarf packed enough pounds to reach a mass 1.4 times that of the Sun, it can no longer support itself. The star suddenly collapses, heats to incredible temperatures, and burns up explosively in a runaway fusion reaction. What we see here on Earth is the sudden appearance of a brand new star within the galaxy’s disk. Of course, it’s not really a new star, but rather the end of an aged one.

T24 is the largest iTelescope system in the Northern Hemisphere. It is big, it is beautiful. Situated under dark and clear skies deep in its Sierra mountains remote location in Northern California USA. This is the same location Insight Observatory plans to host the 16" Dream Astrograph Telescope.

T24 - 61 meter (24") CDK  Reflecting Telescope
T24 - 61 meter (24") CDK  Reflecting Telescope

T24 is .61 meter (24") CDK reflecting telescope and the result of long and careful planning, manufacture and final configuration. Featuring the latest in imaging trains and software control systems T24 is sure to produce amazing images and groundbreaking deep science for its users on the iTelescope.Net network.

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