North-East of the Large Magellanic Cloud (LMC), a peculiar combination interstellar shell, emission nebulae, and a collection of shock fronts forming a structure that we called earlier a “Flying Owl Nebula” is located, for which an earlier image was obtained using the Chilescope T3 system (ASA-N D=0.5m, f/3.8) [1]. Here we present the closer view to it obtained with the Chilescope T1 system (ASA Ritchey-Chretien RC-1000: D=1m, f/6.8) revealing its internal structure in much greater detail, using a similar color schema, but in different orientation and mirroring - aimed to increase the resemblance of the the scene to that of a flying owl. The positioning of this area with respect to the main body of the LMC is shown on the finder map in revision B.
The size of the side of the image of 17.7 arc.min corresponds to 816ly at the distance to LMC taken as 158kly. The bubble in the middle of composition is identified as interstellar shell [KDS99] SGS 14 [2] which is 290ly across by a longer axis, to which multiple arcs of emission nebulae are connected. One of those arcs contains 3 shock fronts highlighted in Fig. 1 (also in revisions C and D), one of which appears to be related to the Brey 51 Wolf-Rayet star [3]. The origin for the other two fronts isn’t so easily identifiable. Several distant galaxies are showing up in the background of this image, the most notable of which is LEDA 178603 [4] also visible in Fig. 1.
Fig. 1. The structure of the shock fronts mid-lower forming the left “wing base” of the Flying Owl nebula - a cropped image shown at 100% of original resolution: (a) Brey 51 Wolf-Rayet star [3] and the shock front associated with it, (b) and (c) - two other larger fronts. A distant galaxy (d) LEDA 178603 [4] also makes an appearance here in the lower-left corner.Two closeups of the most interesting substructures in the scene are shown in Fig. 2 (also in revision E) and Fig. 3 (also in revision F).
Fig. 2. Closer look at a shock front and emission nebulae collection around Brey 51 Wolf-Rayet star [3] - a cropped image shown at 200% of original resolution.
Fig. 3. Closer look at the “left wing” of “the Owl” revealing the complex structure of multiple overlapping fronts that is likely all that remains of multiple SNRs located in this area. Shown at 100% of the original image resolution.Data and initial calibration/integration: Alexandr Zaytsev
https://www.astrobin.com/users/m57ring/ASA Ritchey-Chretien RC-1000: D=1m, f/6.8 on alt-azimuthal direct drive fork mount, FLI ProLine 16803 with secondary mirror based motorized focusing and automatic de-rotation (Telescope #1 system of ChileScope observatory, Río Hurtado Valley, Chile).
11x Ha + 11x OIII + 10x SII guided 1200 sec exposures (10h40min of combined integral) collected over 7 imaging sessions carried out on Mar 5, 7, 11, 12, 13, 14, 15, 2024 using Chilescope Telescope #1 system.
Image Processing: Mark Hanson
https://www.hansonastronomy.comEnjoy, Mark and Alex
[1]
https://www.astrobin.com/lobsen/[2]
https://simbad.cds.unistra.fr/simbad/sim-id?Ident=%403069599&Name=%5bKDS99%5d%20SGS%2014&submit=submit[3]
https://simbad.cds.unistra.fr/simbad/sim-id?Ident=Brey+51&[4]
https://simbad.cds.unistra.fr/simbad/sim-id?Ident=LEDA+178603&NbIdent=1&Radius=2&Radius.unit=arcmin&submit=submit+id
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