NGC 1511

Galaxy in the constellation Hydrus From Wikipedia, the free encyclopedia

NGC 1511 is a barred spiral galaxy in the constellation of Hydrus. Its velocity with respect to the cosmic microwave background is 1341 ± 5 km/s, which corresponds to a Hubble distance of 19.76 ± 1.39 Mpc (~64 million light-years).[1] It was discovered by British astronomer John Herschel on 2 November 1834.[3][4]

ConstellationHydrus
Right ascension03h 59m 36.9554s[1]
Declination−67° 38′ 03.094″[1]
Redshift0.004474[1]
Quick facts Observation data (J2000 epoch), Constellation ...
NGC 1511
A spiral galaxy, tilted away so that it is seen mostly from the edge. The disc of the galaxy glows blue from its centre, due to younger stars in the spiral arms. There are large and small patches of gas, glowing in red and pink colours, where new stars are forming. Webs of dark dust are spread over the disc. The glow of the disc fades into a dark background, with a couple of stars.
NGC 1511 imaged by the Hubble Space Telescope
Observation data (J2000 epoch)
ConstellationHydrus
Right ascension03h 59m 36.9554s[1]
Declination−67° 38′ 03.094″[1]
Redshift0.004474[1]
Heliocentric radial velocity1341 ± 5 km/s[1]
Distance64.4 ± 4.5 Mly (19.76 ± 1.39 Mpc)[1]
Group or clusterNGC 1511 Group (LGG 107)[2]
Apparent magnitude (V)11.3[1]
Characteristics
TypeSAa pec: HII[1]
Size~83,000 ly (25.45 kpc) (estimated)[1]
Apparent size (V)3.5′ × 1.3′[1]
Other designations
ESO 055- G 004, IRAS 03594-6746, 2MASX J03593698-6738033, MCG +00-12-072, PGC 14236[1]
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Morphology

Eskridge, Frogel, and Pogge published a paper in 2002 describing the morphology of 205 closely spaced spiral or lenticular galaxies. The observations were made in the H-band of the infrared and in the B-band (blue). Eskridge and colleagues described NGC 1511 as:

Nearly edge-on. SW side of bulge is hidden by a prominent dust band, indicating that the bulge is small. Inner SE spiral arm has several very bright star-forming knots. Arms do not appear very extended (may be due to foreshortening), but there is an extended, featureless LSB [Low Surface Brightness] disk beyond the arms.[5]

NGC 1511 Group

According to A.M. Garcia, the galaxy NGC 1511 is the central member of the NGC 1511 group (also known as LGG 107) that includes NGC 1473 [fr] and NGC 1511A [fr].[2] Some sources also include the galaxy ESO 54-21 [d] in this group.[6]

Supernova

One supernova has been observed in NGC 1511: SN 1935C (type unknown, mag. 12.5).[7] The supernova was discovered by Emily Hughes Boyce on 16 August 1935, and was initially thought to be either a supernova, or a nova associated with the Large Magellanic Cloud. It was classified as a nova, and known as either HV 11970 or Nova Hydri 1935. In September 1988, Sidney Van den Bergh and Martha L. Hazen concluded definitively that the object was a supernova in NGC 1511, and the star was given the designation SN 1935C.[8][9]

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See also

References

External links

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