WR15

WR15 is a designation that can refer to several different things, most notably a variable star and a specific type of radio waveguide.

In astronomy, WR15 is a Wolf-Rayet star located in the constellation Cygnus. Wolf-Rayet stars are a rare and very luminous type of massive star characterized by their strong stellar winds and the presence of broad emission lines in their spectra, indicating the ejection of circumstellar material. WR15 is classified as a WC-type Wolf-Rayet star, meaning its spectrum is dominated by carbon and oxygen lines. These stars are typically in the later stages of their evolution and are thought to eventually explode as supernovae.

In the field of microwave technology, WR15 refers to a standard waveguide size. Waveguides are hollow metal conduits used to guide electromagnetic waves, particularly in the microwave and radio frequency ranges. WR15 specifically denotes a rectangular waveguide with an inside width of 0.150 inches (3.81 mm) and a height of 0.075 inches (1.905 mm). This size is designed to operate efficiently within a specific frequency range, typically from 33 to 50 GHz, which falls within the Ka-band. WR15 waveguides are commonly used in telecommunications, radar systems, and scientific instrumentation where precise transmission of high-frequency signals is required.