NGC 3511-13

NGC 3511(top left) is an intermediate spiral galaxy located in the constellation Crater. It is 45 million light years from Earth, which, given its apparent dimensions, means that it’s about 70,000 light years across. The structure includes two highly diffuse, thick, and irregular spiral arms originating from the bulge, accompanied by additional fragmented spiral arms. Dark dust lanes cross the spiral pattern. The bulge looks elliptical and weak. At the galaxy's center is a supermassive black hole.

Originally classified as a type 1 Seyfert galaxy, this galaxy has been reclassified as an HII region galaxy due to its narrow emission lines.

NGC 3511 forms a pair with NGC 3513 which is a barred spiral galaxy which lies 10.5 arcminutes away. NGC 3513(bottom right) is a barred galaxy with a thin high-surface-brightness bar. The bar ends feature two distinct spiral arms with star formation knots and HII regions, creating a patchy appearance. The two galaxies form a small group, known as the NGC 3511 group, which also includes the galaxy ESO 502-024.

A faint, narrow hydrogen bridge appears to connect the two galaxies. Additional hydrogen-alpha data is required to confirm this observation.

Planewave 24" with Moravian C5 camera taken at Obstech, Chile

LRGB, Lum 71 at 600sec, RGB 36 at 300sec

SWOS group: Mazlin, Parker, Forman, Hanson

Image Processing: Hanson

Enjoy, Mark