Keyphrases
Line-of-sight
100%
Gas Phase
47%
Column Density
46%
Interstellar Medium
39%
High-resolution Spectrograph
28%
Absorption Lines
27%
Hubble Space Telescope
25%
Interstellar Gas
23%
Small-scale Structures
22%
Imaging Spectrometer
22%
High-resolution
22%
Dust
22%
Space Telescope
21%
Ca(II)
21%
Galactic
21%
Galaxies
20%
Orion
18%
Absorber
18%
Krypton
17%
Galactic Disks
15%
Abundance Ratios
15%
Cm(III)
14%
Quasars
14%
Interstellar Absorption
14%
Physical Condition
14%
Neutral Species
13%
Phase Abundance
13%
Echelle
12%
Zn(II)
12%
ISM
11%
Metallicity
11%
Proper Motions
11%
Milky Way
10%
Interstellar Abundances
10%
Fe(II)
9%
Infall
9%
Line Systems
9%
Variable Component
8%
Multi-epoch
8%
Equivalent Length
8%
High Signal-to-noise Ratio
8%
Carbon Abundance
7%
Cadmium
7%
Temporal Variation
7%
Emission Lines
7%
One-component
7%
Atomic Gases
7%
Lyman-alpha
7%
Telescope Observations
7%
Ionized Gas
7%
Physics
High Resolution
81%
Spectrographs
71%
Vapor Phase
62%
Interstellar Matter
54%
Line of Sight
42%
Hubble Space Telescope
32%
Space Telescope
31%
Interstellar Gas
27%
Abundance Ratio
21%
Metallicity
18%
Signal-to-Noise Ratio
15%
Fine Structure
14%
Proper Motion
14%
Quasar
14%
Milky Way
14%
Observatory
13%
Interstellar Abundances
11%
Linewidth
9%
Interstellar Absorption
9%
Interstellar Line Absorption
9%
Gas-to-Dust Ratio
8%
Iron
8%
Monatomic Gas
7%
Multiple Stars
7%
High-Velocity Clouds
7%
Vibrational State
7%
Ionized Gas
7%
Cosmic Microwave Background Radiation
7%
Diffuse Interstellar Clouds
7%
Absorption Spectra
7%
Spiral Arms
6%
Globular Cluster
6%
B Stars
6%
Gas Velocity
5%
Cosmic Microwave Background
5%
Solar Neighborhood
5%
Photoionization
5%
Chemical Evolution
5%
Interstellar Clouds
5%
Ultraviolet Spectrum
5%