Subject |
is not accelerated by |
is a kind of |
is an instance of |
has definition |
has charge |
has symbol |
carbon monosulfide | | | diatomic molecule | | | CS |
carbon monoxide | electric or magnetic fields | | neutral particle | A molecule consisting of one carbon atom and one oxygen atom. It is the most abundant interstellar molecule after molecular hydrogen and is especially useful because it radiates at radio wavelengths, so astronomers can use it to map the distribution of molecular hydrogen. | 0 | CO |
cyanogen radical | | | diatomic molecule | | | CN |
hydroxyl radical | | | diatomic molecule | An interstellar molecule first detected in 1963 at a wavelength of 18 cm. The four transitions that occur near 18 cm are caused by the splitting of the ground level. Galactic OH sources have been divided into three classes according to whether the OH emission is strongest in the main lines, particularly at 1665 MHz (Class 1), whether the emission and absorption are highly anomalous only in the satellite lines (Class 2) (Class 2a, 1720-line emitters; Class 2b, 1612-line emitters), or whether there is only absorption in all four lines (Class 3). | | OH |
molecular hydrogen | electric or magnetic fields | neutral particle | diatomic molecule | A molecule of hydrogen, discovered in interstellar space in 1970. H2 is a very hard molecule to detect. None of its transitions lie in the visible part of the spectrum. Second, being a symmetric homonuclear molecule, it does not have an electric-dipole rotation-vibration spectrum, and detection must be based on the weak quadrupole spectrum. Third, ultraviolet radiation is a very efficient dissociator of H2, so any H2 that survived would presumably be located inside very dense interstellar clouds. So far observations have borne out this supposition. Measurements of the region within about 1 kpc of the Sun suggest that H2 is about twice as abundant as atomic H. | 0 | H2 |
molecular oxygen | electric or magnetic fields | | neutral particle | | 0 | O2 |
silicon monosulfide | | | diatomic molecule | | | SiS |
silicon monoxide | | | diatomic molecule | | | SiO |
sulfur monoxide | | | diatomic molecule | | | SO |