As in the case of the quiescent spectrum 13, there is clear evidence for absorption and emission from highly ionized gas surrounding the neutron star during the bursts.O vii K-shell emission ...

Spectra Absorption spectra All elements either emit or absorb certain frequencies of light. Evidence from atomic line spectra supports the Bohr model of the atom using photon frequency calculations.

Studying the line spectra produced by hot gases and absorbed by cooler gases allows us to identify the elements in stars. When a gas is very hot, it doesn’t emit all wavelengths of light. Hot ...

The absorption lines close to each other below 5,000 Angstroms in the bottom spectrum are the calcium H and K lines and can be used to determine how quickly stars are zooming around the galaxy. In ...

"Spectra of stars have absorption lines because gas and dust along the line of sight to the stars absorb some of the light." "The most recent ideas are that diffuse interstellar bands are ...

Mysterious absorption lines could illuminate 90-year puzzle ... "We saw the same absorption lines in the spectra of every star," Figer says.

The results show that V659 Sct went from optically thick absorption line spectrum into optically thin nebular phase very quickly, what indicates a small envelope mass.

Michele Cappellari, Eric Emsellem, Parametric Recovery of Line‐of‐Sight Velocity Distributions from Absorption‐Line Spectra of Galaxies via Penalized Likelihood, Publications of the Astronomical ...

Therefore, a dark line appears in the spectrum at that particular wavelength. Because the wavelengths at which absorption lines occur are unique for each element, ...

The discovery of 13 diffuse interstellar bands with the longest wavelengths to date could someday solve a 90-year-old mystery. Astronomers have identified the new bands using data collected by the ...