<templatestyles src="Template:Sky/styles.css" />Coordinates: Sky map 04h 54m 13.5s, −53° 21′ 40″

NGC 1705

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NGC 1705 is a peculiar lenticular galaxy and a blue compact dwarf galaxy (BCD)[1] in the southern constellation of Pictor, positioned less than a degree to the east of Iota Pictoris,[2] and is undergoing a starburst.[3] With an apparent visual magnitude of 12.6[4] it requires a telescope to observe. It is estimated to be approximately 17 million light-years from the Earth,[5] and is a member of the Dorado Group.[6]

This is a relatively isolated galaxy, with its nearest neighbors being more than Script error: No such module "val". distant. However, its neutral hydrogen disk shows a significant amount of warp, suggesting that the outer gas is still settling into place.[1] The mass models of the galaxy suggest the dominant source of mass is a dark matter halo.[7] It has a super star cluster located near the galactic center,[7] and shows strong galactic winds.[1] Designated NGC1750–1, this cluster has a maximum radius of Script error: No such module "val". and is Script error: No such module "val". Myr old.[8]

The major starburst activity is happening at the core of the galaxy, within the central Script error: No such module "val"., and this is providing the main ionizing source out to distance of Script error: No such module "val". or more.[3] Over the last 10 million years it has added Script error: No such module "val". worth of stars.[1] The younger stars in the galaxy with an age below a billion years have an estimated Script error: No such module "val". and are mainly concentrated near the center, while the older star populations have Script error: No such module "val". and form a more extended distribution. The total mass of neutral hydrogen in the galaxy is estimated at Script error: No such module "val"..[7]

References

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External links


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