Uploaded on May 02, 2021 02:19 UTC

A red giant only 36.7 light years away. Arcturus is a cooler star, T ~ 4300 K, as can be seen from the lower blue-violet intensities and fitting the spectrum to black body radiation. Black-body radiation is the "thermal electromagnetic radiation within or surrounding a body in thermodynamic equilibrium with its environment, and emitted by a black body." It has a specific spectrum of wavelengths, inversely related to intensity that depend only on the body's temperature. See "Planck's law of black-body radiation." SEE ALSO: CN BOOTIS


Tags: Loading...

Log in to use these tools.


Fork this spectrum and work on a copy

Comparison & Sets


Find similar

Data extraction

Set new cross-section

Flip image horizontally

Capture using this calibration

Use legacy 1.0 interface

Want a tool that's not listed here? Add a request to the Wishlist, or learn how to write your own tools.

Operation Date Description

Operations enable reversible modification of data -- they act like filters which process the data. The graph you see above represents the data after these operations have been run. Delete them to undo their effects, or to apply them in a new order.

  • The thumbtack symbol indicates that data has been saved in a snapshot upon running that operation.
  • The symbol indicates that the operation's data snapshot is being referred to by another operation. Click it to learn more.
  • Operations with a #000-style suffix, like subtract:3243#2414 are referring to a specific snapshot (in this example, #2414) of another spectrum. Click to learn more.

These spectra are being temporarily displayed for comparison; Clear all

Title Author Tools

Save these as a set

Title Author Spectra

No comments

Leave a comment

You must be logged in to comment.

ID Title Created Author
spectrum.addAndParseTag('smooth:10'); // Smooth the spectrum

// spectrum.addAndUploadTag('smooth:10'); // <== to save 

Run Save as Gist Read about the Spectral Workbench API