3 ms·
> We report detection of CN emission and also detect numerous Ni I lines while Fe I remains undetected, potentially implying efficiently released gas-phase Ni.
by ccgreg 1y ago
> We report detection of CN emission and also detect numerous Ni I lines while Fe I remains undetected, potentially implying efficiently released gas-phase Ni.
Where does it say there is zero iron? This is an upper bound, not zero.
- galacticaactual 1y ago"FE I remains undetected" Remains Undetected. Pretty crystal clear.
- ccgreg 1y agoNo. Undetected iron and zero iron are different. Source: astronomer.
- galacticaactual 1y ago"Undetected" is not an "upper bound." Source: computer scientist.
- ccgreg 1y agoUndetected means you can compute an upper bound, based on the performance of your instrument. Again, these are undergraduate level concepts.
- galacticaactual 1y agoAgain, you’re being obtuse but well leave it there. Good day.