Giant Asteroid hitting the Sun

A quick brush with the Large Body Accretion Theory

According to modern cosmogeny our Solar System was amalgamized from a rather dense, dusty, molecular cloud. Ignoring the initial impetus responsible for the imbalance which led to planetary/stellar accretion I'd still like to look briefly at the results of accretionary StarBuilding. As it is generally accepted that the solar nebula condensed unevenly, leading to planetary formation, the probability of infalling materials of large size striking the Sun during its formation and progression along the Hertzprung/Russel diagram into its current Main Sequence condition is extremely high until quite recently.
For a good look at what it means to physics when a large, subjovian, mass impacts a star just observe the conditions at the interface of a Black Hole with its attendent accretionary disc. When a large piece of infalling material strikes a discrete cosmic entity (ie; a star, Neutron Star, or singularity), in this case a 5-10 solar mass Black Hole, almost all of its enormous kinetic potential is transferred to the target (just like in a game of Pool), which cannot absorb all of it at once. This unhappy overload results in an incredible bloom of thermal photon release (heat), not to mention additional, randomized, energy in the form of short-wave, higher frequency, photons as well (UV, EUV, X-Ray, and Gamma wavelength). The amount of energy lost/radiated outward by such a transfer is unimaginable to any mortal minds except, perhaps, those of the upper crust of the Astrophysics and Nuclear Physics fields. A large enough transfer, such as that taking place periodically at the center of our galaxy, would produce enough deadly radiation to certainly wipe out any possible life forms inhabiting Earthlike Planets within 20,000LY radius, whether they be Dinosaurs, Ferrets, or even insufficiently well EMP protected Transformers(TM).
On the mundane scale, a 5 Earth mass protoplanet striking a smallish star like our Sun would create a very nice scale model of such a disaster, with a lethal radius of perhaps 50AU, quite enough to wipe out any and EVERY living creature on Earth, no matter how well hidden.

One wonders how even TNOs (TransNeptunianObjects) could survive such a blast unaltered. Could it be that the ices we read spectra from in the outer Solar System are NOT unchanged from primordal chaos (ie; the nebula we formed from)? That would spell death to many interlocked concepts accepted as dogma in Astronomy and Astrophysics.

Thank you for reading this Essay. I hope it is entertaining and informative.

Wild Bill

 

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What makes you think there will be any infalling materials of large size, period? You are ignoring conservation of angular momentum. As a protostar forms the nebula from which it forms will flatten and spread into a protoplanetary disk. Prior to this there will be no large objects other than the protostar itself. Planetesimals form in the protoplanetary disk. These protoplanets can spiral inward due to interaction (friction) with the disk as a whole. The spiraling-in stops if (a) the protoplanet reaches a gap in the disk (no more friction) or (b) if the disk disappears -- which happens soon (soon in a stellar evolution time frame) after the star ignites.

 

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It's a good bet that the sun wouldn't mind it all. However, if an event ever happened such as the one you described, then it wouldn't hurt to put on a little more sunscreen on that day, just to be safe.

 

the object probably wouldn't melt because of it's size asteroids might look as if they are on fire but in reality their core stay's frozen until it reaches the surface.

On the sun the surface becomes visible at roughly 1/100th bar atmosphere so it would plunch trough that until it get's deeper where it would explode and then melt.

However that's only the case if it's from this solar system any object that doesn't have our solar systems momentum would impact with at least a 100 times the speed as normal asteroids do