Part 3 — SUBJECT INDEX
Reading edition
, Class 166
classification 168
metallic lines and band absorption 167
peculiar 172
observational material 208
Abnormal abundance, effect on
spectrum 172
Abnormal conditions, effect on
spectrum 171
Absent elements 86
Absolute magnitudes for Draper
classes 197
Absorbing efficiencies of atoms 136
Absorption coefficient 110
Absorption lines 11, 50
Abundance of atomic species, 135, 177,
183
Abundance of atoms, terrestrial 5
Aluminum 68, 122
Arc spectrum 13
Atomic life 21, 110
life, astrophysical 22, 158
nucleus 4
number 5
states, probabilities of 23
weights 5
Azimuthal quantum number 8, 204
Balmer lines in stars 166
lines, maximum 166
series limit 42
Barium 85, 126
Blackness of continuous background 49
Blending of lines 171
Bohr’s Table 9
Boundary temperature 27
Calcium 70, 122
Carbon 59, 121, 207
compounds 61
spectroscopic and chemical valencies 11
Central intensities of spectrum lines 51
Central temperature 27
Chemical symbols 5
Chemical valency 10
Chromium 77, 124
Chromosphere 35, 47, 159
Classification, meaning of 190
Classification, principles of 191
Cobalt 80
Color indices of stars 49
Conductivities of flames 112
Consistency of temperature scale 130
Continuous background of stellar
spectrum 46, 48
Copper 80
Critical potential 14
Critical potential, astrophysical
determination 156
c-stars 173
Definitions, index to 203
Density and radius of second type
stars 36
Displacement rule 13, 20
Draper classes, homogeneity 193
Draper system 191
Duration of atomic states 21
Earth, composition of crust 185
origin of 185
total, composition of 187
Effective level 28, 136
Effective temperature 27
Effective temperature, Draper
classes 197
Effect of conditions on spectrum 24
Electrons, extra-nuclear 8
Electron transfer 11
Elements 5
Elements, in stellar atmospheres 55
Emission lines, production of 11, 53
Emission lines, stars showing 53
Energy distribution in solar spectrum 49
Energy distribution in stellar
spectrum 49
Equivalent outer orbits, electronic 10
Even number rule 177
Excitation 11
Excitation potential 15
Flash spectrum 40, 53
Formulae in theory of ionization 106
Fractional concentration 105
Furnace experiments 112
Galactic concentrations of Draper
classes 197
Gallium 81
Gaseous nebulae, continuous
spectrum 49
Giant and dwarf spectra 195
Giant and dwarf temperature
differences 31
Helium 58, 121
Hot spark 18
Hydrogen, atom 12
continuous spectrum 57
energy levels 13
line intensities 121
peculiar behavior 56
secondary spectrum 56
stellar spectra 55
Inner quantum number 204
Ionization 11, 15, 97
as criterion of pressure 44
potential 15
" and atomic number 20
" astrophysical 156
" and temperature of
maximum 157
temperature 30
temperature scale 33, 132, 133
Ionized atom, lines of 101
Intensity of lines 23, 116
accuracy 118
estimation 117
observational material 116
Intensity scales 117
Interior of star, ionization in 18
Iron 79, 125
Isotopes 5
Law of Mass Action 105, 110
Lead 86
Level of origin of lines 134
Life of atom 21
Life of atom, astrophysical 22, 158
Limit of Balmer series 42
Line intensity, data on 121
notes on 127
unknown lines 207
Lines of unknown origin 55
Lithium 59
Low temperature conditions, stellar
atmosphere 94
Magnesium 67, 122
Magnesium, compounds 67
Manganese 78, 124
Marginal appearance 105, 135, 179
Marginal appearance, observational
data 181
Mass numbers of isotopes 5
Maximum of lines 106
Meteorites, composition 187
Molecule, ionization of 19
Molybdenum 84
Nickel 80
Niobium 84
Nitrogen 63, 207
Nucleus, atomic 4
, Class 162
Occurrence of elements in stars 5
Optical depth 27, 35
Origin of line spectra 11
Orion nebula, continuous spectrum 49
Oxygen 65, 207
Oxygen, compounds 66
Palladium 84
Partial electron pressure 109
Partition function 107
Percentage of stars in Draper classes 197
Photosphere 35, 47
Photoelectric ionization 159
Physical constants, astrophysical
evaluation 155
Physical constants, required by
ionization theory 108
Potassium 70
Pressure, atmospheres of stars 25, 34
from Balmer series limit 44
from flash spectrum 40
from ionization theory 45
from line sharpness 38
from line width 39
from radiative equilibrium 40
shift of lines 26, 38
summary 45
gradient in outer layers of star 34
Quantum number 8
Quantum relation 11
Radiative equilibrium in outer layers
of star 40
Radium 86
Radius and density of second type
stars 36
Rare earths 85
Relative abundance of atoms,
estimation 183
abundance of atoms in stellar
atmosphere 177
intensities of spectrum lines 23
Reorganization time, see atomic life
Residual intensity 51
Reversing layer 50
Reversing layer, mass and
dimensions 47
Rhodium 84
Rubidium 81
Ruthenium 84
Rydberg constant 14, 155, 204
Saturation 52, 135
Scandium 72, 123
Series notation 55
Silicon 24, 68, 122
Silicon stars 169
Silver 84
Sodium 67
Sodium atom 8
Solar atmosphere 47
energy distribution 49
intensities 113
Space numbers for Draper classes 197
Spark spectrum 14
Special problems in stellar
atmospheres 161
Spectroscopic valency electrons 10
Stark effect 26
Stars used for intensity estimates 119
Stellar atmosphere compared with
earth’s crust 184
Stellar reversing layer 91
Strontium 81, 126
Strontium stars 169
Structure of absorption line 180
Subordinate lines 12
Subordinate series 99
Sulphur 70, 207
Surface gravity 35, 36
Symmetry number, see spectroscopic
valency electrons
Temperature class 24, 112
scale 28, 33
scale, ionization 33, 133
bright stars 31
giant and dwarf 31
Theory of solution 110
Tin 85
Titanium 72, 123
Titanium compounds 75
Total pressure in stellar atmospheres 110
Total quantum number 8
Typical giant star 41
Ultimate lines 11, 94, 111
Uniformity of stellar atmospheres 178
Valency, chemical 10
Valency, spectroscopic 10
Vanadium 75, 124
Weights of atomic states 107
Width of lines 39
Wings 51
Wolf-Rayet stars 164
absorption in 164
continuous spectrum 49
Yttrium 82, 129
Zeemann effect 25
Zinc 80, 126
Zirconium 83