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Further Measurements of Magnetic Fields in Interstellar Clouds of Neutral Hydrogen
Nature, 1969A new series of measurements of the Zeeman splitting of 21-cm spectral lines has revealed strong (> 10−5 G) magnetic field effects in several neutral hydrogen clouds in the direction of HII regions. Low limits have been set to the line-of-sight field components in six other regions of space.
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The Leo Intergalactic Neutral Hydrogen Cloud
1986The current status of the neutral hydrogen λ21 cm radio observations of the intergalactic cloud in Leo are described. These include both HI observations at Arecibo with an angular resolution of ∼3 arc min, and VLA D-array observations with an effective resolution of 45 arc sec.
Yervant Terzian +2 more
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The distance to two neutral hydrogen clouds
The Astrophysical Journal, 1996A lower limit to the distance of the high-velocity cloud (HVC) complex A of 4 kpc (z > 3 kpc) is derived. The HVC is detected toward the Seyfert galaxy Mrk 106 in Mg II lambda lambda 2796, 2803 absorption spectra taken with Hubble Space Telescope (HST) proving that Mg+ is present in the cloud. It is not detected in the Mg II spectra of two stars, PG
Wakker, B +7 more
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Cooling of Interstellar Clouds of Neutral Hydrogen and the Abundance of Molecular Hydrogen
Publications of the Astronomical Society of Japan, 1968Abstract The structure of the radiative cooling layer behind the shock front due to interstellar cloud-collision is calculated for a collision velocity of Mach number 20 (~ 16 km/sec). The magnetic field is assumed to be 0 or 10–5 gauss parallel to the shock front. The cooling mechanisms involved are the collision of H atoms with O atoms,
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Properties of the Neutral Hydrogen in the Magellanic Clouds
1971The first low-resolution survey of the neutral hydrogen in the Clouds (Kerr et al., 1954) showed the existence of large Hi envelopes around both Clouds and an unexpectedly large gas content for the Small Cloud. The second survey (Hindman et al., 1963) was also carried out with a small telescope but a better receiver was used; this study confirmed the ...
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