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Tarantula Nebula in the Large Magellanic Cloud, Alex Woronow

Tarantula Nebula in the Large Magellanic Cloud

Tarantula Nebula in the Large Magellanic Cloud, Alex Woronow

Tarantula Nebula in the Large Magellanic Cloud

Equipment

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Acquisition details

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Description

Tarantula Nebula in the Large Magellanic Cloud

OTA:……………….FSQ 106ED (AUS2)
Camera:………….FLI Proline
Observatory:…. Telescope Live

EXPOSURES:                
…R: 12 x 450
…G: 12 x 450
…B: 10 x 450
…H: 14 x 300        
…S: 12 x 300        
…O: 11 x 300        
Total exposure    7.3 hours

Image Width: 5d 17m
Processed by Alex Woronow (2022) using PixInsight,  SWT, Topaz

Here are two versions of a wide-angle view of the Tarantula nebula and surroundings in the Large Magellanic Cloud. Both versions use emission-line extraction. Image A is SHO-Lines + RGB and image B is the SHO-Lines only. In both cases, the SHO lines were mapped to my version of true-color and H-beta was synthesized for each image.

The Ha emission line, plus 10% of the OIII and SII lines combined to make the L-channel in the SHO-Line image (B). Image A had no additions to its L-channel.

There are several differences between the two images, as should be expected. The most obvious is the lack of the blue star-illuminated cloud to the lower left of the Tarantula-nebula complex in the SHO-Lines image (B). That blue patch is obviously dominated by reflection nebulae. Image C is a blinking image of the Ha image (as captured) and the Ha emission-line only image. The “as captured” image contains the continuum spectrum as well as the emission line. And, indeed, the reflection nebulae contribute, through continuum emissions, to the Ha as-captured image, but are gone from the line-only image, as they should be. (Neither image has been processed beyond applying a stretch.)

Comments

Revisions

  • Final
    Tarantula Nebula in the Large Magellanic Cloud, Alex Woronow
    Original
  • Tarantula Nebula in the Large Magellanic Cloud, Alex Woronow
    B
  • Tarantula Nebula in the Large Magellanic Cloud, Alex Woronow
    C

B

Title: SHO Extracted Emission lines

Description: Please see discussion on the left

Uploaded: ...

C

Title: Blink of Ha as captured and extracted Ha emission line

Description: Please see the description on the left

Uploaded: ...

Sky plot

Sky plot

Histogram

Tarantula Nebula in the Large Magellanic Cloud, Alex Woronow