Celestial hemisphere:  Northern  ·  Constellation: Cygnus (Cyg)  ·  Contains:  21 Cyg  ·  21 eta Cyg  ·  25 Cyg  ·  27 Cyg  ·  27 b01 Cyg  ·  28 Cyg  ·  28 b02 Cyg  ·  B144  ·  B146  ·  B147  ·  HD189066  ·  HD189085  ·  HD189148  ·  HD189315  ·  HD189474  ·  HD189528  ·  HD189594  ·  HD189751  ·  HD189864  ·  HD189942  ·  HD190113  ·  HD190114  ·  HD190429  ·  HD190467  ·  HD190468  ·  HD190570  ·  HD190629  ·  HD190785  ·  HD190841  ·  HD190864  ·  And 536 more.
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Wolf-Rayert 134, the Tulip nebula and a black hole, Göran Nilsson
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Wolf-Rayert 134, the Tulip nebula and a black hole

Getting plate-solving status, please wait...
Wolf-Rayert 134, the Tulip nebula and a black hole, Göran Nilsson
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Wolf-Rayert 134, the Tulip nebula and a black hole

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Description

There is quite a lot going on in this area of Cygnus that I recently imaged with my dual-RASA8 rig and NBZ (Ha+Oiii) filter.

First, to the left, there is WR 134, a variable Wolf-Rayet star at a distance of about 6000 ly. Its intense wind of radiation pushes out a bubble like structure emitting faint but distinctive Oiii light.

Then there is the strongly Ha emitting Tulip nebula at the bottom right.

However, maybe most interesting is the bluish egg-shaped structure just to the right of the Tulip nebula. I had no idea it was there until I started processing the image. I asked Wim van Berlo, who is good with atlases and catalogues, if he could find out what it was. It turned out to be a shock structure created by the the stellar black hole Cygnus X-1 interacting in a binary structure with the blue supergigant variable star designated HD226868 (the bottom one of the two brighter stars just below the blue egg). It is one of the most intense x-ray sources detected. Interestingly Cygnus-X1 was the first object confirmed to be a black hole, having 10 solar masses and spinning around 800 times per second. You can read more about it here: https://www.nature.com/articles/nature03879

Finally, as a bonus there is also the small blue planetary nebula NeVe 2 (http://simbad.u-strasbg.fr/simbad/sim-id?Ident=NeVe%202%20). You can find it by zooming in near the right top edge, at 8 o'clock from the bright blue star 25 Cyg.

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