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Celestial hemisphere:  Northern  ·  Constellation: Cygnus (Cyg)  ·  Contains:  21 Cyg  ·  21 eta Cyg  ·  22 Cyg  ·  25 Cyg  ·  27 Cyg  ·  27 b01 Cyg  ·  28 Cyg  ·  28 b02 Cyg  ·  29 Cyg  ·  29 b03 Cyg  ·  34 Cyg)  ·  34 P Cyg  ·  35 Cyg  ·  36 Cyg  ·  B144  ·  B145  ·  B146  ·  B147  ·  Crescent Nebula  ·  HD188876  ·  HD188969  ·  HD189039  ·  HD189066  ·  HD189085  ·  HD189148  ·  HD189257  ·  HD189301  ·  HD189315  ·  HD189335  ·  HD189378  ·  And 357 more.
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Cygnus: from the Crescent Nebula to the bow shock wave from the Cyg X-1 black hole, Des McMorrow
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Cygnus: from the Crescent Nebula to the bow shock wave from the Cyg X-1 black hole

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Cygnus: from the Crescent Nebula to the bow shock wave from the Cyg X-1 black hole, Des McMorrow
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Cygnus: from the Crescent Nebula to the bow shock wave from the Cyg X-1 black hole

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Description

This section of Cygnus is particularly rich in objects of significance to astrophysics.

A Wolf-Rayet star (WR 136) now powers the emission from the Crescent nebula, which owes its structure to
the combined effects of fast moving solar winds from  WR 136 catching up and  colliding with an earlier mass ejection
from the progenitor when it first became a red supergiant.

Remarkably, the tiny Soap Bubble planetary nebula is clearly resolved (thanks to drizzle) below the Crescent nebula.

In the centre of the field of view is the fainter Oiii bubble nebula surrounding WR 134. Presumably the asymmetry in this case results from
the interstellar medium being less dense to the lower side in this image (I speculate).

Arguably the most significant nebula on display - but one of the most subtle at this image scale -
lies directly above the Tulip nebula in the form of a faint arc of Oiii emission (zoom in for a closer look).
This is now accepted to result from the bow shock wave created by a jet, emitted by the accretion disk  of the Cygnus X-1 black hole, as it impacts the interstellar medium. Symmetry dictates the existence of another jet flowing in the opposite direction but in this case it is believed the density of the interstellar medium is too low to produce a discernible nebula.

Drizzled x 2 and processed in Pixinsight, down sampled x2 for posting.

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  • Cygnus: from the Crescent Nebula to the bow shock wave from the Cyg X-1 black hole, Des McMorrow
    Original
  • Final
    Cygnus: from the Crescent Nebula to the bow shock wave from the Cyg X-1 black hole, Des McMorrow
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Cygnus: from the Crescent Nebula to the bow shock wave from the Cyg X-1 black hole, Des McMorrow

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Yorkshire Astro Imaging
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