Starship Asterisk*

dougettinger wrote:When I read the more serious and detailed reports, much of the jargon is confusing. There may be a good textbook that could clarify some of my confusion if the jargon is really standardized.

Some of the limitations as I understand them are: the alignment of the structure w.r.t. to the earth's observation platform (does a survey exist that compares the number of spherical with cylindrical outbursts?); the amount of width of view that is being analyzed (I desired to see data from numerous radial distances and numerous angular degrees surrounding the center); the temperatures at various radial distances that produce the various ionization levels (do temperature gradient studies exist from the center to certain identified boundaries); the difficulty of measuring the shock wave velocities and time of its origin (I would like to know the velocity of the identified shock wave boundaries and when each originated.), etc.

Nereid, do you know of such specific reports that may help me with the listed limitations ? Many reports drift "all over creation" and fail to benefit me. Thanks for coming to the forefront to answer some of my curious queries.

dougettinger wrote:Hello Nereid,

I will investigate SAO/NASA ADS. Thanks for the tip.

I am strictly an amateur astrophysicist. My interest in these objects is an investigation of how they expel matter over the period when they are creating various shells of metals in their cores. I have suspicions that their is a trend of what metals are expelled over time. The expulsion resulting from the core collapse after an iron core is created is of very special interest to me.

dougettinger wrote:I reviewed the Helix Nebula. Astronomers are focused on the knots and assymetry of the rings - only using spectral lines that are most easily imaged to obtain kinematic models. I need studies that possibly include lower ionization energies which would be found on the outer regions of planetary nebula. I will checkout Vela.

The closest supernova, or more correctly supernova remnant, is the Vela supernova remnant [See Link] in the constellation Vela. The "guest" star exploded about 11 - 12,000 years ago and is located around 800 light years from Earth.