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The photo seems to hint at the galaxy having a massive halo enveloping the disk too, with the right side tending to lift up. Tends to suggest a big tidal influence to displace so much material.
Eliptical galaxies also tend not to show dust amungst their mass. Spiral galaxies can also be very dusty too, and fat- look at Centuraus A.
Might not this 'thin' galaxy be a highly flattened eliptical galaxy, as it is described as lenticular, to me, suggesting no obvious arms that defines a spiral galaxy?
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