A question about steller surface polution

[suntrack2]

What you will opine that what may exactly happening on the sun's surface?
consistent surface polution resulting into a red giant(in sun's case)?

In another star's death this polution is taking a great part to collapse the star from its position, in steller surface polution case do you think that if sun will occur as red giant the immediate cause of it will be the steller surface polution only due to some heavy material gather into the sun's core?

and in such case the operation of solar flairs will partially stop or interrupt?

My question is here : that in such case sun may acquire some solid things into it which metalicity may be count in exact measurements.


Preview: Stellar tiramisu Star surface polluted by planetary debris

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[loglo]

I think they are just saying that dwarfs with planets can have their atmosphere polluted with added metals so that the metallicity reading we infer in the core by our usual methods is too high.
Giant stars don't show the same however because they are just that, giant:-
"The metal excess produced by this pollution, while visible in the thin atmospheres of solar-like stars, it is completely diluted in the extended, massive envelopes of the giants." but to answer your question:-
"the effects of pollution are rather tiny on the main sequence and difficult to detect."

In another star's death this polution is taking a great part to collapse the star from its position, in steller surface polution case do you think that if sun will occur as red giant the immediate cause of it will be the steller surface polution only due to some heavy material gather into the sun's core?

There was nothing in the paper about the "pollution" changing the evolution of a star. The Sun will evolve into a giant because it uses up all of its hydrogen, not because of additional metals in the atmosphere.

[suntrack2]

thanks for the reply loglo.

[neilzero]

I perhaps do not understand the question, but a star becomes a red giant due to a near total loss of hydrogen in the core. Polutants on, or even far below the surface, may change the color temperature of the photosphere a bit, but the star will continue on main sequence. An enourmous amount of polutants would need to enter the core to take a star off main sequence. Neil