Going after the fine structure of NGC 346 / N66 in SMC in Ha (Alexandr Zaytsev)

Going after the fine structure of NGC 346 / N66 in SMC in Ha

4h40min of integral Ha exposure of NGC 346 star cluster [1, 2] and associated N66 HII region [3, 4] (150 pc in diameter located at a distance of about 62 kpc as per estimates given in [3, 4]) of the Small Magellanic Cloud (SMC) - captured remotely using Telescope #3 (ASA-N D = 0.5m f/3.8, FLI ProLine 16803) system of ChileScope during 4 imaging sessions carried out on Dec 29 & 30, 2023, Jan 1 & 5, 2024.

Partial star suppression is applied. Lots of fine structure details are recovered here, especially in the version with full star suppression (revision B).

A recent image image of this target obtained with JWST (MIRI) is available under [5, 6].

Also this wide-angle HaRGB image produced with Wide Field Imager instrument at the 2.2-metre MPG/ESO telescope at the La Silla Observatory in Chile is rather impressive as well [7, 8].

There also exists an absolutely stunning Ha image of the central part of N66 region by the HST ACS/WFC [9, 10].

[1] https://arxiv.org/abs/1905.03359

[2] https://arxiv.org/pdf/1905.03359.pdf

[3] https://iopscience.iop.org/article/10.1088/1538-3873/ac697b/meta

[4] https://iopscience.iop.org/article/10.1088/1538-3873/ac697b/pdf

[5] https://webbtelescope.org/contents/media/images/2023/145/01HBVF32473WERVA8Y2XVE6446

[6] https://stsci-opo.org/STScI-01HBVHZW1Q7GTJ0VRPE721T5PT.png

[7] https://www.eso.org/public/images/eso1008a/

[8] https://www.eso.org/public/archives/images/large/eso1008a.jpg

[9] https://hubblesite.org/contents/media/images/2005/35/1819-Image.html?linkId=95410502

[10] https://stsci-opo.org/STScI-01EVT7ZQBJCTPWNP6FW2CA3SV8.jpg

Final
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B

Title: Version of the image with full star suppression applied

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Status	Advanced success
Started	...
Astrometry.net job	9091352
PixInsight job	XK4GYKOUHIAXQ4VJ7V8KQCI1AQKEZGIR
PixInsight queue size	n/a
PixInsight stage	TASK_LOG

RA (center)	00h59m23s.486
RA (top/left)	01h02m12s.342
RA (top/right)	01h02m01s.960
RA (bottom/right)	00h56m37s.883
RA (bottom/left)	00h56m40s.372

Dec (center)	-72°10′08″.34
Dec (top/left)	-72°22′25″.13
Dec (top/right)	-71°57′24″.50
Dec (bottom/right)	-71°57′44″.75
Dec (bottom/left)	-72°22′52″.16

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Going after the fine structure of NGC 346 / N66 in SMC in Ha

Going after the fine structure of NGC 346 / N66 in SMC in Ha

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Going after the fine structure of NGC 346 / N66 in SMC in Ha

Going after the fine structure of NGC 346 / N66 in SMC in Ha

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