Hi, my paper has just today been posted to arXiv. :-)
I did the work about 5 years ago, congrats to the lead author for pushing the paper through to completion.

http://arxiv.org/abs/1606.07539

My part was in solving the equations from sections 2.5 to 2.9 and 2.13. Results are in section 3.2 and Appendix C.

I’m rather proud of getting the temperature spikes right in terms of both time and magnitude in Figure 14b. Fig 20 is another one of mine.

well done moll

Excellent!!

Nice one, mollwolfumble!

Good work.

A bit of background is appropriate. The question is the origin of the solar system, and solar systems in general. Planets are built up from planetesimals which are built from asteroids which are built from chondrules and matrix, the matrix binds the spherical chondrules together. The earliest solids in a cooling forming solar system are the minerals with highest melting point, first nanodiamonds and then “calcium aluminate inclusions” (CAIs). The chondrules are then built around these CAIs. So we’re talking very very early solar system here.

It was observed some years ago that many chondrules show evidence of very rapid heating. This led to the most popular theory of chondrule formation by the process of heating inside shock waves (identical to sonic booms) within the gas of the solar nebula. Kurt Liffman’s view is different, he thinks that the heating is due to hypervelocity impact between particles and the gas of the solar nebula (identical to reentry heating of spacecraft). I’ve done the calculations, and they confirm what Kurt thinks.

Do the same elements (and those next to each other on the periodic table) tend to clump together when the solar system is forming or is it later geological activity or both.

Cymek said:

Do the same elements (and those next to each other on the periodic table) tend to clump together when the solar system is forming or is it later geological activity or both.

Initially, fractionation of elements comes from clumping elements with high melting points together (and low melting points together), and those with the same atomic diameter together. The main mineral in the very early formation of the solar system is Forsterite, with a formula of Mg2SiO4. Iron, nickel, manganese and calcium have similar atomic diameters and chemical properties to Mg, so can be also included.

Thousands of years later, objects become big enough for gravity to separate elements by different densities. Only then do we get separation into iron-nickel, into silicates, into carbon chemicals, and into ices.

I wonder if eventually proto planet mining will become a reality, it would be extremely useful to find various elements clumped together without have to dig/drill through numerous tons of rock to get to them like we do on Earth.

Cymek said:

I wonder if eventually proto planet mining will become a reality, it would be extremely useful to find various elements clumped together without have to dig/drill through numerous tons of rock to get to them like we do on Earth.

Hmm, a couple of possibilities come to mind.
1) Turn a comet into an ecosystem using available water, carbon and trapped atmosphere.
2) Mine carbonaceous chondrites for food and coal-substitute.
3) Mine iron-nickel asteroids for metals, possibly including uranium.

When it comes to usable easily-available ore bodies, Earth seems to have the best resources, none of the other planets or moons have metal ores in nearly as high a concentration.

congratulations.

Arts said:

congratulations.

+1

Peak Warming Man said:

Arts said:

congratulations.

+1

plus another wun.

roughbarked said:

Peak Warming Man said:

Arts said:

congratulations.

+1

plus another wun.

And another. Well done!

good on ya

my letter to the newspaper was refused

That’s good news mollwollfumble

Not just on arXiv, now. Latest email is:

“Your manuscript entitled “Ejection via Accretion: A Unified Framework for CAI Transport, Heating, Wark-Lovering Rim Formation and Bowl-Shaped CAIs”, ref. MN-16-0782-MJ.R2, has now been accepted for publication in Monthly Notices of the Royal Astronomical Society Main Journal. Accepted 2016 June 28.”

mollwollfumble said:

Not just on arXiv, now. Latest email is:

“Your manuscript entitled “Ejection via Accretion: A Unified Framework for CAI Transport, Heating, Wark-Lovering Rim Formation and Bowl-Shaped CAIs”, ref. MN-16-0782-MJ.R2, has now been accepted for publication in Monthly Notices of the Royal Astronomical Society Main Journal. Accepted 2016 June 28.”

Just, wow. :)

roughbarked said:

mollwollfumble said:

Not just on arXiv, now. Latest email is:

“Your manuscript entitled “Ejection via Accretion: A Unified Framework for CAI Transport, Heating, Wark-Lovering Rim Formation and Bowl-Shaped CAIs”, ref. MN-16-0782-MJ.R2, has now been accepted for publication in Monthly Notices of the Royal Astronomical Society Main Journal. Accepted 2016 June 28.”

Just, wow. :)

aye aye

I’m truly touched by your congratulatory posts. Thank you all.