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dc.contributor.authorGalametz, A.
dc.contributor.authorStern, D.
dc.contributor.authorPentericci, L.
dc.contributor.authorDe Breuck, C.
dc.contributor.authorVernet, J.
dc.contributor.authorWylezalek, D.
dc.contributor.authorFassbender, R.
dc.contributor.authorHatch, N.
dc.contributor.authorKurk, J.
dc.contributor.authorOverzier, R.
dc.contributor.authorRettura, A.
dc.contributor.authorSeymour, Nick
dc.identifier.citationGalametz, A. and Stern, D. and Pentericci, L. and De Breuck, C. and Vernet, J. and Wylezalek, D. and Fassbender, R. et al. 2013. A large-scale galaxy structure at z = 2.02 associated with the radio galaxy MRC 0156-252. Astronomy and Astrophysics. 559.

We present the spectroscopic confirmation of a structure of galaxies surrounding the radio galaxy MRC 0156-252 at z = 2.02. The structure was initially discovered as an overdensity of both near-infrared selected z > 1.6 and mid-infrared selected z > 1.2 galaxy candidates. We used the VLT/FORS2 multi-object spectrograph to target ~80 high-redshift galaxy candidates, and obtain robust spectroscopic redshifts for more than half the targets. The majority of the confirmed sources are star-forming galaxies at z > 1.5. In addition to the radio galaxy, two of its close-by companions (<6″) also show AGN signatures. Ten sources, including the radio galaxy, lie within | z − 2.020 | <0.015 (i.e., velocity offsets <1500 km s-1) and within projected 2 Mpc comoving of the radio galaxy. Additional evidence suggests not only that the galaxy structure associated with MRC 0156-252 is a forming galaxy cluster but also that this structure is most probably embedded in a larger-scale structure.

dc.titleA large-scale galaxy structure at z = 2.02 associated with the radio galaxy MRC 0156-252
dc.typeJournal Article
dcterms.source.titleAstronomy and Astrophysics

Reproduced with permission from Astronomy & Astrophysics, © ESO

curtin.departmentDepartment of Physics and Astronomy
curtin.accessStatusOpen access

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