Astrophysics (index)about

iron

(Fe)
(metal, Fe, atomic number 26)

Iron (Fe) is the element with atomic number 26, symbol Fe. It has four stable isotopes. It is the most stable product of fusion in stars.

Because iron can be detected at a distance, the ratio of iron to hydrogen is used as an approximate measure of metallicity. This is expressed as the numerical value [Fe/H] which means the log of the ratio of iron atoms to hydrogen atoms (of the star or galaxy) minus the same for the Sun, i.e., "[Fe/H] = 0.0" means "same iron abundance as the Sun".

Shock can excited iron [Fe II] forbidden lines at 1.257 micron and 1.644 micron, which can be observed.


(element,metal,chemistry)
http://en.wikipedia.org/wiki/Iron

Referenced by:
alpha process
chemical equilibrium (CE)
crustal magnetism
dynamo
Earth
element
fractionation
G band
GW170817
ionization potential
iron peak
magnetic anomaly
magnetic field
maximum iron fraction
metallicity (Z)
moon
neutronization
neutron star
nickel (Ni)
planetary differentiation
Psyche
refractory material
r-process
siderophile
silicate
silicon (Si)
s-process
trans-iron element
water-ice planet

index