Globular cluster population of the HST Frontier Fields galaxy J07173724+3744224
Citations Over Time
Abstract
We present the first measurement of the globular cluster (GC) population surrounding the elliptical galaxy J07173724+3744224 (|$z$| = 0.1546). This galaxy is located in the foreground in the field-of-view of the Hubble Space Telescope (HST) Frontier Fields observations of galaxy cluster MACS J0717.5+3745 (|$z$| = 0.5458). Based on deep HST Advanced Camera for Surveys (ACS) F435W, F606W, and F814W images, we find a total GC population of Ntot = 3441 ± 1416. Applying the appropriate extinction correction and filter transformation from ACS F814W to the Johnson V band, we determine that the host galaxy has an absolute magnitude of MV = −22.2. The specific frequency was found to be SN = 4.5 ± 1.8. The radial profile of the GC system was best fit using a power law of the form σ ∼ R−0.6, with the GC population found to be more extended than the halo light of the host galaxy (σhalo ∼ R−1.7). The F435W − F814W colour distribution suggests a bimodal population, with red GCs 1–3 times more abundant than blue clusters. These results are consistent with the host elliptical galaxy J07173724+3744224 having formed its red metal-rich GCs in situ, with the blue metal-poor GCs accreted from low-mass galaxies.
Related Papers
- → Dynamics of [CLC]c[/CLC]D Clusters of Galaxies. IV. Conclusion of a Survey of 25 Abell Clusters(2001)143 cited
- → Evolution of galaxy cluster scaling from XMM-Newton observation of the galaxy clusters at z⩾ 0.4(2008)1 cited
- → Brightest Cluster Galaxy Formation in Low-Redshift Galaxy Clusters(2001)
- Abell 2146: riding the wake of a merging galaxy cluster(2011)
- → Abell 3112 Galaksi Kümesinin XMM-Newton ile Kimyasal Zenginleşme Çalışması(2023)