| HVGC-1[1] | |
|---|---|
| Observation data (J2000.0[1]epoch) | |
| Constellation | Virgo |
| Right ascension | 12h 30m 54.70s[1] |
| Declination | +12° 40′ 58.61″[1] |
| Distance | 54 Mly (16.5 Mpc[1]) |
| Physical characteristics | |
| Metallicity | [Fe/H] = −0.9±0.3[1]dex |
| Notable features | First discovered hypervelocity globular cluster |
| Other designations | HVGC-1,[1] H70848,[1] M87 H70848[1] |
| See also:Globular cluster,List of globular clusters | |
HVGC-1 is the first discoveredhypervelocityglobular cluster.[2] Discovered in 2014, it was found escaping the supergiant elliptical galaxyMessier 87,[3] in theVirgo Cluster.[1] It is one of thousands ofglobular clusters found in M87.[4] It is the first hypervelocitystar cluster so far discovered.[5] The globular is located at decimal degrees (RA, DEC) (187.72791°, +12.68295°).[1]
The object was observed to have an outlier velocity, ending with a determinedradial velocity of−1026±13 km/s. In relation to M87, its velocity was determined to be2100–2300 km/s. The cluster's velocity is so high that it will escape the Virgo Cluster as well.[1]
The cluster's velocity is thought to originate by being ejected by thesupermassive black hole at the center of M87, when the black hole stripped the outer layers of HVGC-1 off, it also ejected the remaining core with greater than escape velocity.[2]
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