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View Full Version : Supernova Precursor Discovered in Spiral Galaxy NGC 2397



Fraser
2008-Apr-05, 05:50 PM
It's a bit like trying to find a needle in a haystack when looking for a star in a galaxy. Although hard to do, astronomers using images from the Hubble Space Telescope (HST) are doing just that, trying to find stars before they explode as supernovae. In 2006, supernova SN 2006bc was spotted in spiral [...]

More... (http://www.universetoday.com/2008/04/05/supernova-precursor-discovered-in-spiral-galaxy-ngc-2397/)

trinitree88
2008-Apr-05, 07:43 PM
It's a bit like trying to find a needle in a haystack when looking for a star in a galaxy. Although hard to do, astronomers using images from the Hubble Space Telescope (HST) are doing just that, trying to find stars before they explode as supernovae. In 2006, supernova SN 2006bc was spotted in spiral [...]

More... (http://www.universetoday.com/2008/04/05/supernova-precursor-discovered-in-spiral-galaxy-ngc-2397/)


Fraser. I'll list to her alert. That's not the only way supernovae can be predicted though as was discussed before, there a chance that R Cor Borealis type reverse novae will modify their infrared signatures, too. pete

see:http://www.bautforum.com/universe-today-story-comments/63053-some-variable-stars-cloak-themselves-view.html


The other method is to search for iron emission lines, suddenly appearing in an O, B, or A giant star on an H-R diagram. As these are candidates for type 2 core collapse if they are 8 or more solar masses....the appearance of iron might signal accumulating cores of iron. Depending on your astrophysical model...a type 2 occurs in 1-10 years. This is an excellent high school science fair project for some ambitious young astronomer.

see:http://www.bautforum.com/astronomical-observing-equipment-accessories/34323-type-2-supernova-progenitor-search.html