table

Definitions (see paper for more details):

²⁶Al/²⁷Al = Slope of the Al-Mg isochron regression, unitless ×10-5. 

error = 2-sigma uncertainty in the reported value, in the same units.

δ²⁵Mg = delta 25Mg in ‰ amu

δ²⁶Mg* = delta initial 26Mg in ‰ amu, the y-intercept value of the Al-Mg isochron regression

n = Number of measured data points fitted in the regression

Al/Mg max = The regression data point with the highest Al/Mg ratio.

MSWD = Mean Square Weighted Deviation is a measure of goodness of fit, also called reduced chi-squared (χ²ᵣ).

Axis one = Often the measured length of the CAI, often the major axis of an ellipse or the diameter of a circle , in microns.

Axis two = The second axis length, if given, in microns. If this is not given, we assume a circle rather than an ellipse.

Notes:

• An MSWD value of 1 million is given for unreported, large values.

• An MSWD value of 2.9999 is given for unreported MSWD that appears small and acceptable.

• The data are divided based on having a robust MSWD or not, called "isochron" or "not isochron". The "anomalous" CAIs are those with isotopic anomalies such as FUN, FUN-hib (HAL-like), PLACs, platy hibonites, and a few others (the assosiated paper goes into depth about how the data are categorized in this way). 

• "model isochron" means the isochron regression was forced through an intercept of chondritic δ²⁶Mg*. These regressions typically have 2 or less data points. 

• In the plots, we define "size" as either the diameter or as: sqrt(AxisOne*AxisTwo).

Sunbust plots allow for data visualization by chondrite type and author (2010 and later). Click the segments to zoom into and out of categories.