Intermediate spiral galaxy

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NGC 253 is an intermediate spiral galaxy located in the constellation Sculptor.

An intermediate spiral galaxy is a galaxy that is in between the classifications of a barred spiral galaxy and an unbarred spiral galaxy.^[1]^[2] It is designated as SAB in the galaxy morphological classification scheme.^[1]^[2]

Grades

Under the de Vaucouleurs classification system, SAB-galaxies are intermediate between SA-galaxies and SB-galaxies

Example	Type	Information	Notes
	SAB0-	SAB0- is a type of lenticular galaxy
	SAB0	SAB0 is a type of lenticular galaxy
	SAB0+	SAB0+ is a type of lenticular galaxy
	SAB0/a	SAB0/a can also be considered a type of intermediate lenticular galaxy
Messier 65	SABa		M65 is actually an "SAB(rs)a"
NGC 4725	SABab		NGC 4725 is actually an "SAB(r)ab pec"
Messier 66	SABb		M66 is actually an "SAB(s)b"
Messier 106	SABbc		M106 is actually an "SAB(s)bc"
Sculptor Galaxy	SABc		Sculptor is actually an "SAB(s)c"
NGC 2403	SABcd		NGC 2403 is actually an "SAB(s)cd"
	SABd
	SABdm	SABdm can also be considered a type of intermediate Magellanic spiral
NGC 4625	SABm	SABm is a type of Magellanic spiral (Sm)	NGC 4625 is actually an "SAB(rs)m pec"

↑ 1.0 1.1 "Building Galaxies", Leslie Kipp Hunt, 15 October 2004
↑ 2.0 2.1 "Galaxy Formation", Malcolm S. Longair, 1998, Springer, ISSN 0941-7834

v t e Galaxies

Morphology	Disc galaxy Dwarf galaxy elliptical irregular spheroidal spiral Elliptical galaxy Irregular galaxy barred Lenticular galaxy barred unbarred Ring galaxy Polar Spiral galaxy barred flocculent grand design intermediate Magellanic unbarred cD-galaxy

Structure	Bar Bulge Dark matter halo Disc Galactic halo corona Galactic plane Interstellar medium Protogalaxy Spiral arm Supermassive black hole

Active nuclei	Blazar LINER Quasar Radio galaxy X-shaped Relativistic jet Seyfert galaxy

Energetic galaxies	LAE LIRG Starburst galaxy BCD Pea

Interaction	Field galaxy Galactic tide Galaxy groups and clusters brightest cluster galaxy fossil group Interacting galaxy merger Satellite galaxy Stellar stream Superclusters Walls Void galaxy Voids and supervoids

Lists	Groups and clusters Large quasar groups Nearest galaxies Polar-ring galaxies Ring galaxies Quasars Spiral galaxies Superclusters Voids

See also	Dark galaxy Faint blue galaxy Galaxy formation and evolution Intergalactic dust Intergalactic stars Intergalactic travel

Book:Galaxies Category:Galaxies Portal:Astronomy

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