Celestial hemisphere:  Northern  ·  Constellation: Lyra (Lyr)  ·  Contains:  IC 1296  ·  M 57  ·  NGC 6720  ·  PK063+13.1  ·  Ring Nebula

Image of the day 10/14/2020

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    M57 envelope in Ha-OIII-OIII, Boris Emchenko
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    Image of the day 10/14/2020

    Getting plate-solving status, please wait...
      M57 envelope in Ha-OIII-OIII, Boris Emchenko
      Powered byPixInsight

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      Description

      М 57 envelope

      M57 halo ("envelope") is considered to be outer layers of the host star blown away by stellar wind during asymptotic giant branch phase just before nebula itself was born.

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      The nebula image is Ha-OIII-OIII composition (200% crop of central part). Stars were overlaid from RGB image.

      Due to high dynamic range, some processing tweaks were used. First, two separate integrations per filter were made: best of the best based on FWHM criteria for the brightest nebula part and a full set of images for maximizing SNR in shadows. Than stretch of various degree was applied. And they all were combined later into artificial HDR.

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      [1] Nebula 3D model image was taken from "Studies of NGC 6720 with Calibrated HST WFC3 Emission-Line Filter Images–I: Structure and Evolution", C. R. O’Dell, G. J. Ferland, W. J. Henney and M. Peimbert, 2013

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      Full frame:

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      • Final
        M57 envelope in Ha-OIII-OIII, Boris Emchenko
        Original
        M57 envelope in Ha-OIII-OIII, Boris Emchenko
        B
        M57 envelope in Ha-OIII-OIII, Boris Emchenko
        C

      B

      Description: Nebula 3D model [1]

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      C

      Description: Full frame

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      M57 envelope in Ha-OIII-OIII, Boris Emchenko

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