NOAO < IMAGE GALLERY < Arcturus spectrum

High resolution spectrum of Arcturus

[Arcturus spectrum]

About this image

A high resolution version of the spectrum of the prototypical cool giant star Arcturus, also known as alpha Boo (spectral type K1 III). This image was created from a digital atlas observed with the Coude Feed telescope at Kitt Peak National Observatory, near Tucson, Arizona (`Visible and Near Infrared Atlas of the Arcturus Spectrum', by Kenneth Hinkle, Lloyd Wallace, Jeff Valenti and Dianne Harmer, Astronomical Society of the Pacific, 2000). The images shown here were created to mimic an echelle spectrum, with wavelength increasing from left to right along each strip, and from bottom to top. Each of the 50 slices covers 60 angstroms, for a complete spectrum across the visual range from 4000 to 7000 angstroms. This image covers the same wavelength range in the same format as the spectrum of Procyon, type F5, and the spectrum of our own Sun, type G2. (Note for interested users: because this was made from digital data, we can create any size or shape on request, but please give us plenty of time! The images here have the correct aspect ratio for a 35mm slide).

More: stars page.


Minimum credit line: N.A.Sharp, NOAO/AURA/NSF

Downloadable versions:
300 x 200 17 kb color JPEG (on this page)
600 x 400 61 kb color JPEG
1536 x 1024 296 kb color JPEG
3071 x 2048 752 kb color JPEG
8192 x 5464 3.0 Mb color JPEG
8192 x 5464 43.7 Mb 8-bit color TIFF
8192 x 5464 131.2 Mb 24-bit color TIFF
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