Quark nuggets ahoy

0803.1795v1.pdf (application/pdf Object)

Click the link for the intriguingly titled "The search for Primordial Quark Nuggets among Near Earth Asteroids".

Turns out some small asteroids in the solar system might be made of quarks, and careful observation could check this out:

The exotic nature of the nuggets allows one relatively easy form of distinguishing them from conventional asteroids: since the strange quark matter is expected to have a plasma frequency as high as 20MeV (well in the hard-ray frequencies), the bare quark surface would act as a perfect mirror to the incident solar light. Hence, contrary to the case of even metallic asteroids for which A ∼ 0.1, we expect albedos ≈ 1 and therefore a quotient FV /FI much larger than any reasonable normal surface.

Sounds cool; asteroids that are nice shiny mirror balls.

The paper says there may be 10 to 100 bound to the solar system, and many others that may just pass through. They might occasionally hit the earth:

The possibility of a direct impact onto the Earth is
extremely small (about one event per Hubble time) for halo PQNs, but grows considerably for a captured population. Specific signatures of such an hypothetic collision (likely giving rise to a huge epilinear earthquake) have never been worked out in full detail.

Just thought you should know.