WR 135 - Spectrum (Robert Eder)

Celestial hemisphere: Northern · Constellation: Cygnus (Cyg)

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WR 135 - Spectrum

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WR 135 - Spectrum

The weather has been awful the last few weeks, especially the strong winds. So no new deep sky images yet and still no first light for my new ASI2600MC Pro😒. But I have a few spectra left to analyse. The seeing was absolutely terrible again, but spectroscopy still works, kind of.🙂

WR 135 is a variable Wolf-Rayet star of the type WC8. Located around 6,000 light years away from Earth in the constellation of Cygnus, surrounded by a faint bubble nebula blown by the intense radiation and fast wind from the star. It is just over four times the radius of the sun, but due to a temperature of 63,000 K it is 250,000 times as luminous as the sun.

WR 135, together with WR 134 and WR 137, was one of three stars in Cygnus observed in 1867 to have unusual spectra consisting of intense emission lines rather than the more normal continuum and absorption lines. These were the first members of the class of stars that came to be called Wolf-Rayet stars (WR stars) after Charles Wolf and Georges Rayet who discovered their unusual appearance.

WR 135 is less than a degree away from WR 134 and the two are believed to lie at approximately the same distance from Earth within the Cygnus OB3 association. Both stars lie within a shell of hydrogen thought to have been swept up from the interstellar medium when one or both stars were on the main sequence. It is unclear which of the two stars is primarily responsible for creating the shell.

The bubble nebula is a dim overlay from another image just for orientation.

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Description: WR 135 profile

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Description: WR 135 Raw Spectrum

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Status	Basic success
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Astrometry.net job	5308328
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WR 135 - Spectrum

WR 135 - Spectrum

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WR 135 - Spectrum

WR 135 - Spectrum

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