NGC 2915

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NGC 2915
Galaxy List of galaxies

NGC 2915 as observed with the SST as part of the SINGS.
The blue colors represent the 3.6 micrometre emission from stars.
The green and red colors represent the 5.8 and 8.0 micrometre
emission from polycyclic aromatic hydrocarbons and possibly dust.

Observation data
(Epoch J2000)
Constellation
Right ascension 09h 26m 11.5s[1]
Declination -76° 37′ 35″[1]
Redshift 468 ± 3 km/s[1]
Distance 15 Mly (4.6 Mpc)[citation needed]
Type I0[1]
Apparent dimensions (V) 1′.9 × 1′.0[1]
Apparent magnitude (V) 13.3[1]
Notable features
Other designations
PGC 26761[1]

NGC 2915 is a blue dwarf galaxy located 15 million light-years away, right on the edge of the local group. It is remarkable in that the optical galaxy corresponds to the core of a much larger spiral galaxy traced by radio observation of neutral hydrogen[1].

The galaxy has a short central bar, much like the Milky Way and very extended spiral arms.

The reason for the spiral arms and majority of the galaxy's disk to be still neutral hydrogen (as opposed to have formed stars) is not well-understood but is thought to be related to the galaxy's isolation, in that it has no nearby satellite galaxies and no nearby major galaxies to force star formation.

[edit] References

  1. ^ a b c d e f g NASA/IPAC Extragalactic Database. Results for NGC 2915. Retrieved on 2006-11-28.