Quote:
Originally Posted by arecibo
Thank you Robert & Steven.
I've done little progress meanwhile. My first setback was discovering that the Encyclopaedia is out of print 
PS: I'm starting to read Jacob's paper; it seems to answer half of my question: the distribution of the visible emission lines in PN. |
Hello Miguel,
Yes, the Maran encyclopedia is out of print, but there are still plenty of secondhand copies of it, available for purchase on the internet.
Try one of the "book price comparison engines", and put in the ISBN of the encyclopedia into the search box:
www.abebooks.com
www.bookfinder.com
www.bookfinder4u.com
www.fetchbook.info
- also, can try the secondhand network of amazon.com
I agree, Jacob does address the issue of the distribution of emission lines in a planetary nebula. But, the situation within a SNR must be a lot more complex than in a planetary nebula, due to the existence of multiple shockwaves within the object.
(I seem to recall that planetary nebulae expand at a relatively low velocity of about 20-50 km/s)
cheers, Mad Galaxy Man