Sentences with phrase «hydrogen emission lines»
Type II supernovae happen in single star systems (or at least far enough away from any companion star to retain their hydrogen outer layers) and have strong hydrogen emission lines.
http://www.astronomynotes.com/
Type I supernovae happen in close binary systems and do not show strong hydrogen emission lines.
Type Ib and Ic supernovae result from the collapse of a massive star's core whose outer hydrogen layers have been transfered to a companion star or blown off from strong winds which is why they do not show hydrogen emission lines.
Not exact matches
Honda established a division late last year to develop electric vehicles (EVs) as part of its long - held goal for lower - emission gasoline hybrids, plug - in hybrids, EVs and hydrogen fuel cell vehicles (FCVs) to account for two - thirds of its line - up by 2030, from about 5 percent now.
More accurate distances between the most common type of «planetary nebulae» and the Earth can be estimated simply with three sets of data: firstly, the size of the object on the sky taken from the latest high resolution surveys; secondly, an accurate measurement of how bright the object is in the red hydrogen - alpha emission line; and thirdly, an estimate of the dimming toward the nebula caused by so called interstellar - reddening.
They observed the galaxy using a special band - pass filter that selectively transmits the light around an emission line produced by ionized hydrogen (called the H - alpha emission line).
They noticed an object producing the hydrogen Lyman alpha emission line in its spectrum.
The red color represents spectral line emission from hydrogen atoms.
The researchers described several lines of evidence supporting the existence of a hidden AGN energizing the nebula, including the dynamics of the gas and emissions from other elements besides hydrogen, notably helium and carbon.
ALMA's cutting - edge technology enable astronomers to get, for the first time, evidence of the effect of electric fields on the emission of lines of hydrogen.
When hydrogen gas is heated by the ultraviolet emissions of new stars, it produces a spectral signature called the Lyman - alpha line.
Therefore, the research group targeted molecular line emissions from hydrogen cyanide (HCN), formyl ion (HCO +), and hydrogen sulfide (CS) at millimeter / submillimeter wavelengths (* 4) in the galaxy called NGC 1097 (about 50 million light years away) with the ALMA Telescope in the Atacama Desert in Chile.
The light we received from the galaxy in the distant Universe tells us - from hydrogen, oxygen, and neon emission lines - that they followed a different rule to produce the heavy elements.
Using Keck Observatory's powerful infrared spectrograph called MOSFIRE, the team dated the galaxy by detecting its Lyman - alpha emission line — a signature of hot hydrogen gas heated by strong ultraviolet emission from newly born stars.
Massive yet non-supergiant entities known as «Be stars» are main - sequence stars that notably have, or had at some time, one or more Balmer lines in emission, with the hydrogen - related electromagnetic radiation series projected out by the stars being of particular interest.
«We frequently see the Lyman - alpha emission line of hydrogen in nearby stars,» says Adi Zitrin, the discovery paper's lead author.
The presence of the Lyman - alpha line was unexpected: while it is frequently detected in galaxies closer to Earth, the team thought that EGSY8p7's emission line would have been absorbed when the universe was formed by the hydrogen atoms believed to inhabit the space between galaxies.
Honda established a division late last year to develop electric vehicles (EVs) as part of its long - held goal for lower - emission gasoline hybrids, plug - in hybrids, EVs and hydrogen fuel cell vehicles (FCVs) to account for two - thirds of its line - up by 2030, from about 5 percent now.