NGC 4147
NGC 4147 | |
---|---|
Apparent magnitude (V) | 10.74[4] |
Apparent dimensions (V) | 1.730′ × 1.592′[2] |
Physical characteristics | |
Mass | 37,200[5] M☉ |
Tidal radius | 6.6′[6] |
Metallicity | = −1.78[4] dex |
Estimated age | ~14 Gyr[7] |
Other designations | GCl 18, C 1207+188[8] |
NGC 4147 is the
This is a relatively small globular cluster, ranking 112th in luminosity among the Milky Way globular cluster population. It is considered an
The cluster lies some 70.4 ± 7.5 kly (21.6 ± 2.3 kpc) from the Galactic Center,[6] and is relatively isolated from other globular clusters in the galaxy.[3] The position of this cluster makes it a candidate for association with the Sagittarius tidal stream, and thus it may have been captured by the Milky Way after separation from the Sagittarius Dwarf Spheroidal Galaxy.[6] A contour map of the cluster appears to show S-shaped tidal arms stretching to the north and south for several tidal radii. Such features are predicted for globular clusters that follow elliptical orbits and are near their apogalacticon.[10]
References
- Bibcode:1927BHarO.849...11S.
- ^ S2CID 18913331.
- ^ S2CID 119374637.
- ^ S2CID 56419886, 126.
- S2CID 119282444, 53.
- ^ .
- ^ ISBN 978-1139500074.
- ^ "NGC 4147". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2021-02-19.
- Bibcode:2004RMxAA..40..209A.
- S2CID 118505441, A71.
External links
Media related to NGC 4147 at Wikimedia Commons