Sentences with phrase «broad emission lines»
Instead their spectra are dominated by broad emission lines of highly ionized helium, nitrogen, carbon and sometimes oxygen.
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These are called «Type 2» Seyferts to distinguish them from the classical «Type 1» Seyferts with the broad emission lines.
Chugai, N. N. Broad emission lines from the opaque electron - scattering environment of SN 1998S.
The broad emission lines are produced by gas clouds moving at about 10,000 kilometers / second.
Around the accretion disk are relatively dense clouds of hot gas that could be responsible for the broad emission lines seen in Type 1 Seyferts.
Our IR observations show the comparatively broad emission lines, the rapid development of the spectrum to higher ionization, the early appearance of coronal lines, and the absence of dust emission, all features that indicate the hybrid nature of the nova.
It is a broad emission line from helium ions, which indicates the presence of gas heated to temperatures of several tens of thousands of degrees in the system.
Not exact matches
Thorough analysis finally revealed an underlying, much broader, line: the coronal emission line from ionized iron.
The netresult is that the sharp emission line is smeared into a broad, asymmetrical hump — and the broader the hump, the faster the iron must bemoving and the closer it must be to the black hole.
Spectroscopic observations taken with the GTC - 10.4 m telescope reveal a broad (FWHM ~ 1100 km / s), double - peaked H alpha emission line from which we constrain the radial velocity semi-amplitude of the donor to be K2 > 250 km / s.
The faster the disk rotates, the broader the 21 - cm emission line will be.
A Seyfert galaxy is a spiral galaxy with a compact, very bright nucleus that produces a non-thermal continuous spectrum with broad (fat) emission lines on top.
It was something the team had hoped to see for years, and when the telltale, broad - emission lines showed up on the Keck Observatory monitors, the mood in the room lit up.
For example, 59 Cygni is listed as spectral type B1.5 Vnne, [34] indicating a spectrum with the general classification B1.5 V, as well as very broad absorption lines and certain emission lines.
If China delivers on these plans with a full implementation and by expanding its coal caps to broader regions, then its emissions pathway will be almost in line with the IEA's 2 °C scenario.