UV to far-IR reflectance spectra of carbonaceous chondrites- II. The Cg asteroid spectral class and the plausible link among CV and CK chondrites
Abstract
Primitive carbonaceous asteroids are among the darkest objects in our solar system, being the target of future sample-return missions like e.g. Hayabusa 2 and OSIRIS-REx. So far the carbonaceous chondrites arrived to our planet are the only available samples representing these asteroids. The identification of the parent body of each chondrite group is a complex puzzle that requires gain insight into the mineralogy, and physico-chemical processes occurred in space to these undifferentiated bodies. Among the carbonaceous chondrites we concentrate here in the reflective properties of two groups that are chemically related and form the so-called CV-CK clan. We present CK reflectance data that is consistent with a separated evolutionary pathway from CV chondrites. Current data supports a scenario in which the CV and CK chondrites formed in a common parent asteroid that was disrupted by collisions at an early stage of its evolution. Then, at least two asteroid fragments evolved separately and ended with dinstinctive grades of metamorphism.
- Publication:
-
Highlights on Spanish Astrophysics X
- Pub Date:
- March 2019
- Bibcode:
- 2019hsax.conf..483T