31. 15 UMi is Metallic-lined star, meaning it has unusually strong absorption lines of metals in its spectrum. 32. However, the spectrum shows enhanced absorption lines of metals, marking this as a chemically peculiar Am star. 33. Each of these forms of the molecule will create an absorption line at a slightly different rest wavelength. 34. When compiling the Cardamone paper, spectral classification was made using Gas And Absorption Line Fitting ( GANDALF ). 35. Each of these ranges includes dozens of dark absorption lines produced by either carbon dioxide or molecular oxygen. 36. Each of these absorption lines has a characteristic strength that depends on the physical properties of the photosphere. 37. In the process, he recorded a solar spectrum consisting of 3, 000 absorption lines in the optical band. 38. Atomic absorption lines are observed in the solar spectrum and referred to as Fraunhofer lines after their discoverer. 39. An absorption line is produced when photons from a hot, broad spectrum source pass through a cold material. 40. In addition to the exciton lines, there are surprisingly strong additional absorption lines in the same spectral region.