NGC 3432

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NGC 3432 is an edge-on spiral galaxy that can be found in the northern constellation of Leo Minor.[1] It was discovered by German-British astronomer William Herschel on March 19, 1787.[2] This galaxy is located at a distance of Script error: No such module "convert". from the Milky Way.[3] It is interacting with UGC 5983, a nearby dwarf galaxy, and features tidal filaments and intense star formation. Because of these features, it was listed in Halton Arp's Atlas of Peculiar Galaxies.[4]

File:Hubble Traces a Galaxy’s Outer Reaches.jpg
Hubble image of NGC 3432 showing regions of star formation[5]

The morphological classification of NGC 3432 is SB(s)m,[6] which indicates this is a barred Magellanic spiral galaxy (SB) with no inner ring structure (s) and an irregular appearance (m). The galaxy is inclined at an angle of Script error: No such module "val". to the plane of the sky[3] with its major axis along a positional angle of 38°, which means it is being viewed from nearly edge-on. It is interacting with the companion galaxy UGC 5983, which is creating features that extend outside the galactic plane, as well as an extended halo of radio emission.[6] The shape of the galaxy is distorted and two tidal tails have been identified. NGC 3432 has an active galactic nucleus of the LINER type with a nuclear HII region.[7]

In May 3, 2000, a candidate nova was detected in this galaxy.[8] It was located Script error: No such module "val". east and Script error: No such module "val". north of the galactic nucleus, and aligned with an H II region (or spiral arm) of the galaxy.[9] This appeared similar to a type IIn supernova (designated SN 2000ch), but it peaked below the typical luminosity of these events. As such, it may have been a "superoutburst" of a luminous variable and thus it could have survived the event.[10] The outburst was found comparable to an eruption of Eta Carinae in the mid–nineteenth century.[11] Multiple subsequent outbursts were observed in 2008 and 2009.[12] It is now classified as a supernova imposter, and is expected to become a core collapse supernova in the future.[13]

See also

References

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External links

Template:NGC objects:3000-3499 Template:Leo Minor Template:Catalogs Template:Sky

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