SIMBAD references

2014A&A...569A..49C - Astronomy and Astrophysics, volume 569A, 49-49 (2014/9-1)

Confirmation of a galaxy cluster hidden behind the Galactic bulge using the VVV survey.

COLDWELL G., ALONSO S., DUPLANCIC F., HEMPEL M., IVANOV V.D. and MINNITI D.

Abstract (from CDS):

Suzaku and Chandra X-ray observations detected a new cluster of galaxies, Suzaku J1759-3450, at a redshift z=0.13. It is located behind the Milky Way, and the high Galactic dust extinction renders it nearly invisible at optical wavelengths. We attempt here to confirm the galaxy cluster with near-infrared imaging observations and to characterize its central member galaxies. Images from the VVV survey were used to detect candidate member galaxies of Suzaku J1759-3450 within the central region of the cluster up to 350kpc from the X-ray peak emission. Color-magnitude diagrams, color-color diagrams, and morphology criteria allowed us to select the galaxies among the numerous foreground sources. Fifteen candidate cluster members were found very close to a modeled red-sequence at the redshift of the cluster. Five members are extremely bright, and one is possibly a cD galaxy. The asymmetry in the spatial distribution of the galaxies with respect to the X-ray peak emission is an indicator that this cluster is still suffering a virialization process. Our investigation of Suzaku J1759-3450 demonstrates the potential of the VVV survey to study the hidden population of galaxies in the zone of avoidance.

Abstract Copyright:

Journal keyword(s): surveys - Galaxy: bulge - galaxies: clusters: individual: Suzaku J1759-3450

Nomenclature: Table 2: [CAD2014] NN (Nos 1-15).

Simbad objects: 22

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2019.12.06-19:03:12

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