A large-scale galaxy structure at z = 2.02 associated with the radio galaxy MRC 0156-252
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...
| Main Authors: | , , , , , , , , , , , |
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| Format: | Journal Article |
| Published: |
2013
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| Online Access: | http://hdl.handle.net/20.500.11937/16401 |
| _version_ | 1848749166259339264 |
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| author | Galametz, A. Stern, D. Pentericci, L. De Breuck, C. Vernet, J. Wylezalek, D. Fassbender, R. Hatch, N. Kurk, J. Overzier, R. Rettura, A. Seymour, Nick |
| author_facet | Galametz, A. Stern, D. Pentericci, L. De Breuck, C. Vernet, J. Wylezalek, D. Fassbender, R. Hatch, N. Kurk, J. Overzier, R. Rettura, A. Seymour, Nick |
| author_sort | Galametz, A. |
| building | Curtin Institutional Repository |
| collection | Online Access |
| description | 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. |
| first_indexed | 2025-11-14T07:16:37Z |
| format | Journal Article |
| id | curtin-20.500.11937-16401 |
| institution | Curtin University Malaysia |
| institution_category | Local University |
| last_indexed | 2025-11-14T07:16:37Z |
| publishDate | 2013 |
| recordtype | eprints |
| repository_type | Digital Repository |
| spelling | curtin-20.500.11937-164012017-09-13T15:04:05Z A large-scale galaxy structure at z = 2.02 associated with the radio galaxy MRC 0156-252 Galametz, A. Stern, D. Pentericci, L. De Breuck, C. Vernet, J. Wylezalek, D. Fassbender, R. Hatch, N. Kurk, J. Overzier, R. Rettura, A. Seymour, Nick 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. 2013 Journal Article http://hdl.handle.net/20.500.11937/16401 10.1051/0004-6361/201322345 fulltext |
| spellingShingle | Galametz, A. Stern, D. Pentericci, L. De Breuck, C. Vernet, J. Wylezalek, D. Fassbender, R. Hatch, N. Kurk, J. Overzier, R. Rettura, A. Seymour, Nick A large-scale galaxy structure at z = 2.02 associated with the radio galaxy MRC 0156-252 |
| title | A large-scale galaxy structure at z = 2.02 associated with the radio galaxy MRC 0156-252 |
| title_full | A large-scale galaxy structure at z = 2.02 associated with the radio galaxy MRC 0156-252 |
| title_fullStr | A large-scale galaxy structure at z = 2.02 associated with the radio galaxy MRC 0156-252 |
| title_full_unstemmed | A large-scale galaxy structure at z = 2.02 associated with the radio galaxy MRC 0156-252 |
| title_short | A large-scale galaxy structure at z = 2.02 associated with the radio galaxy MRC 0156-252 |
| title_sort | large-scale galaxy structure at z = 2.02 associated with the radio galaxy mrc 0156-252 |
| url | http://hdl.handle.net/20.500.11937/16401 |