Sentences with phrase «observed absorption lines»

Not exact matches

Now if the red shift really is cosmological and depends on distance, one should observe that all these absorption lines have lesser red shift than the emission line of the quasar behind all these gas clouds.

Narrow, stable Ca II and / or Na I absorption features have been detected superimposed to the photospheric lines in 10 out of the 15 observed cold - gas - bearing debris disc.Features are found at the radial velocity of the stars, or slightly blue - or red - shifted, and / or at the velocity of the local interstellar medium (ISM).

The basic ingredients are easy to list: — absorption / emission properties (or spectroscopic parameters) of CO2 at atmospheric pressures, i.e. data presently available from HITRAN - database combined with models of line broadening — observed properties of the atmosphere where most important features include clouds and moisture content, but many other factors have some influence — computer model of the transmission of radiation along the lines of MODTRAN or GENLN2

What I said was that absorption lines or bands would not be observed if the emitter was the same temperature as the gas, not that absorption wouldn't occur.