Примеры использования Neutral hydrogen на Английском языке и их переводы на Русский язык
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The neutral hydrogen is detected as far as 6 kpc(7.5') from the center.
The Tucana Dwarf does not contain very much neutral hydrogen gas.
The total mass of the neutral hydrogen is estimated at 370-450 million Solar masses.
This stage is best seen in the radio emission from neutral hydrogen atoms.
The neutral hydrogen in this galaxy occupies in a volume similar to its optical extent, and is distributed in a squashed, uneven ring.
The Magellanic Bridge(MBR) is a stream of neutral hydrogen that links the two Magellanic Clouds.
The total mass of the molecular hydrogen does not exceed 10% of that of neutral hydrogen.
Measurements have so far failed to detect neutral hydrogen in it-the upper limit is 466 solar masses.
Clouds of neutral hydrogen glow faintly with infrared light and obscure distant views at extreme ultraviolet and soft x-ray wavelengths.
In this region, the typical column density of neutral hydrogen is NH 0.6 x 1020 cm-2.
Neutral hydrogen is also associated with diffuse emission at infrared wavelengths that can confuse observations of faint infrared sources.
HIPASS J1712-64 is an isolated extragalactic cloud of neutral hydrogen with no associated stars.
The distribution of the neutral hydrogen in Dwingeloo 1 is typical one for barred spiral galaxies-it is rather flat with a minimum in the center or along the bar.
In astronomical spectroscopy, the Gunn-Peterson trough is a feature of the spectra of quasars due to the presence of neutral hydrogen in the Intergalactic Medium IGM.
Leo T contains significant amount of neutral hydrogen(HI) gas with the mass of about 2.8× 105 solar masses, which is three times more than the mass of the stars in this galaxy.
When the CMB photons became free to travel unimpeded,ordinary matter in the Universe was mostly in the form of neutral hydrogen and helium atoms.
The measurements have so far failed to detect any neutral hydrogen in it-the upper limit is just 600 solar masses.
Clouds of neutral hydrogen are ubiquitous in the Milky Way galaxy, and effectively absorb photons that are energetic enough to ionize hydrogen, which requires an energy of 13.6 electron volts in the extreme ultraviolet range.
These clouds have densities that vary from 102 to 106 molecules of neutral hydrogen per cm3, with star formation occurring in regions with densities above 104 molecules per cm3.
The large gravity of the dark matter halo in this interpretation explains the perturbed nature of the nearby spiral galaxy NGC 4254 and the bridge of neutral hydrogen extending between the two entities.
S Between 1997 and 2002 it conducted the HIPASS neutral hydrogen survey, the largest blind survey for galaxies in the neutral hydrogen line to date.
The total mass of the galaxy within this radius is estimatedat 2.3 billion Solar masses, while the mass of the neutral hydrogen is estimated at about 100 million Solar masses.
Despite the fact that the ratio of neutral hydrogen to ionized hydrogen may not have been particularly high, the low flux observed past the Lyman-alpha limit indicates that the universe was in the final stages of reionization.
This is caused by the fact that the transition region between gas that is highly ionized and neutral hydrogen is very narrow, compared to the overall size of the Strömgren sphere.
For example, working with the commonly used 21cm line, an important line relating to neutral hydrogen, the relation is generally calibrated with a linear regression and given the form M¯ α P+ β{\displaystyle{\overline{M}}=\alpha P+\beta} where P is log(line width) and α and β are constants.
The flux of the quasar at z 6.28, however, was effectively zero beyond the Lyman-alpha limit,meaning that the neutral hydrogen fraction in the IGM must have been larger than~10-3.
However, as the scattering cross section of photons with energies near that of the Lyman-alpha limit with neutral hydrogen is very high, even a small fraction of neutral hydrogen will make the optical depth of the IGM high enough to cause the suppression of emission observed.
There is currently no star formation in CVn I and the measurements have so far failed to detect neutral hydrogen in it-the upper limit is 30,000 solar masses.
The Dwingeloo 1 galaxy was discoveredin 1994 by the Dwingeloo Obscured Galaxy Survey(DOGS), which searched for neutral hydrogen(HI) radio emissions at the wavelength of 21 cm from objects in the Zone of Avoidance.
Very hot stars of the spectral class O or B emit very energetic radiation, especially ultraviolet radiation,which is able to ionize the neutral hydrogen(H I) of the surrounding interstellar medium, so that hydrogen atoms lose their single electrons.