SIMBAD references

2018MNRAS.480.1956C - Mon. Not. R. Astron. Soc., 480, 1956-1972 (2018/October-3)

Globular cluster population of the HST Frontier Fields galaxy J07173724+3744224.

CARLSON N.L., SULTANOVA M.R., KALAWILA VITHANAGE S.P., BARKHOUSE W.A., IPITA KADUWA GAMAGE G.L., RUDE C.M. and LOPEZ-CRUZ O.

Abstract (from CDS):

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.

Abstract Copyright: © 2018 The Author(s) Published by Oxford University Press on behalf of the Royal Astronomical Society

Journal keyword(s): galaxies: elliptical and lenticular, cD - galaxies: individual: J07173724+3744224 - galaxies: star clusters: general

Simbad objects: 8

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2019.12.13-08:37:25

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