What Type of Spectra Is Obtained From a Reflection Nebula
We see reflection nebulae by reflected light not emitted light. The brightest reflection nebulae are illuminated by B-type stars that are very luminous but have temperatures lower than about 25000 reflection nebula interstellar cloud that would normally be a dark nebula or molecular cloud but whose dust reflects the light from a nearby bright star that is not hot enough to ionize the clouds hydrogen. Reflection Nebula Ic 2631 We present multi-epoch R-band imaging obtained from the Palomar Transient Factory of a small fan-shaped reflection nebula in NGC 1333 that experiences prominent brightness fluctuations. . Star W has medium strong hydrogen lines and weak ionized calcium lines. The spectrum of a reflection nebula is similar to that of the star or stars illuminating the nebula. Strong variations of the relative intensities. Think of it as measuring the spectrum of Sun light reflected off a white surface it will still pro...