hydrogen line वाक्य
उदाहरण वाक्य
मोबाइल
- Hydrogen line observations have also been used indirectly to calculate the mass of galaxies, to put limits on any changes over time of the universal gravitational constant and to study the dynamics of individual galaxies.
- N III and N IV emission lines lines are stronger than N V, and He I lines are stronger than He II, The Balmer series hydrogen lines and some other lines have P Cygni profiles.
- The hydrogen lines and effective temperature of the star are similar to spectral type A8, however the calcium II K line resembles that of an A5 star, and the metallic lines are more similar to an F4 star.
- Stars with even less hydrogen remaining may produce the uncommon type IIb supernova, where there is so little hydrogen remaining that the hydrogen lines in the initial type II spectrum fade to the appearance of a type Ib supernova.
- At times when neutral hydrogen is in thermodynamic equilibrium with the photons in the cosmic microwave background ( CMB ), the neutral hydrogen and CMB are said to be " coupled ", and the hydrogen line is not observable.
- F-type stars have strengthening " H " and " K " lines of Cr I ) beginning to gain on ionized metal lines by late F . Their spectra are characterized by the weaker hydrogen lines and ionized metals.
- The high gain for potentially detecting signals through this lens, such as microwaves at the 21-cm hydrogen line, led to the suggestion by Frank Drake in the early days of SETI that a probe could be sent to this distance.
- In 1958 the International Astronomical Union ( IAU ) defined the galactic coordinate system in reference to radio observations of galactic neutral hydrogen through the hydrogen line, changing the definition of the Galactic longitude by 32?and the latitude by 1.5?
- This will allow a 25x larger field of view and will be used for large scale surveys of the northern sky, bringing back focus on the Hydrogen line for which it was originally designed, but also large pulsar searches and other science.
- These arrays are simple long wavelength telescopes that hope to detect the redshifted hydrogen line from a time very early in the history of the universe when hydrogen was neutral, and by doing so study the first objects that formed in the universe.
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