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Scientific paper - Original scientific paper
The VIMOS Ultra-Deep Survey: Emerging from the dark, a massive proto-cluster at z ~ 4:57
Astronomy and Astrophysics, 615 (2018); A77. https://doi.org/10.1051/0004-6361/201730870
Lemaux, B. C.; Fèvre, O. Le; Cucciati, O.; Ribeiro, B.; Tasca, L. A. M.; Zamorani, G.; Ilbert, O.; Thomas, R.; Bardelli, S.; Cassata, P.; Hathi, N. P.; Pforr, J.; Smolčić, Vernesa; Delvecchio, I.; Novak, Mladen; Berta, S.; McCracken, H. J.; Koekemoer, A.; Amorín, R.; Garilli, B.; Maccagni, D.; Schaerer, D.; Zucca, E More authors...

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Lemaux, B. C., Fèvre, O. L., Cucciati, O., Ribeiro, B., Tasca, L. A. M., Zamorani, G. ... Zucca, E. (2018). The VIMOS Ultra-Deep Survey: Emerging from the dark, a massive proto-cluster at z ~ 4:57. Astronomy and Astrophysics, 615.. doi: 10.1051/0004-6361/201730870

Lemaux, B. C., et al. "The VIMOS Ultra-Deep Survey: Emerging from the dark, a massive proto-cluster at z ~ 4:57." Astronomy and Astrophysics, vol. 615, 2018. https://doi.org/10.1051/0004-6361/201730870

Lemaux, B. C., O. Le Fèvre, O. Cucciati, B. Ribeiro, L. A. M. Tasca, G. Zamorani, O. Ilbert, et al. "The VIMOS Ultra-Deep Survey: Emerging from the dark, a massive proto-cluster at z ~ 4:57." Astronomy and Astrophysics 615 (2018). https://doi.org/10.1051/0004-6361/201730870

Lemaux, B. C., et al. (2018) 'The VIMOS Ultra-Deep Survey: Emerging from the dark, a massive proto-cluster at z ~ 4:57', Astronomy and Astrophysics, 615. doi: 10.1051/0004-6361/201730870

Lemaux BC, Fèvre OL, Cucciati O, Ribeiro B, Tasca LAM, Zamorani G, and sur.. The VIMOS Ultra-Deep Survey: Emerging from the dark, a massive proto-cluster at z ~ 4:57. Astronomy and Astrophysics [Internet]. 2018 [cited 2025 April 03];615. doi: 10.1051/0004-6361/201730870

B. C. Lemaux, et al., "The VIMOS Ultra-Deep Survey: Emerging from the dark, a massive proto-cluster at z ~ 4:57", Astronomy and Astrophysics, vol. 615, 2018. [Online]. Available at: https://urn.nsk.hr/urn:nbn:hr:217:319458. [Accessed: 03 April 2025]

Metadata
Title (english)The VIMOS Ultra-Deep Survey: Emerging from the dark, a massive proto-cluster at z ~ 4:57
AuthorB. C. Lemaux
AuthorO. Le Fèvre
AuthorO. Cucciati
AuthorB. Ribeiro
AuthorL. A. M. Tasca
AuthorG. Zamorani
AuthorO. Ilbert
AuthorR. Thomas
AuthorS. Bardelli
AuthorP. Cassata
AuthorN. P. Hathi
AuthorJ. Pforr
AuthorVernesa Smolčić
MBZ: 336180
AuthorI. Delvecchio
AuthorMladen Novak
MBZ: 344074
AuthorS. Berta
AuthorH. J. McCracken
AuthorA. Koekemoer
AuthorR. Amorín
AuthorB. Garilli
AuthorD. Maccagni
AuthorD. Schaerer
AuthorE Zucca
Author's institutionUniversity of Zagreb
Faculty of Science
(Department of Physics)
Scientific / art field,
discipline and subdiscipline		NATURAL SCIENCES
Physics
Astronomy and Astrophysics
Abstract (english)
Using spectroscopic observations taken for the Visible Multi-Object Spectrograph (VIMOS) Ultra-Deep Survey (VUDS) we report here on the discovery of PCl J1001+0220, a massive proto- cluster of galaxies located at z_spec ~ 4.57 in the COSMOS field. With nine spectroscopic members, the proto-cluster was initially detected as a ~12σ spectroscopic overdensity of typical star-forming galaxies in the blind spectroscopic survey of the early universe (2 < z ≲ 6) performed by VUDS. It was further... More mapped using a new technique developed which statistically combines spectroscopic and photometric redshifts, the latter derived from a recent compilation of incredibly deep multi- band imaging performed on the COSMOS field. Through various methods, the descendant mass of PCl J1001+0220 is estimated to be log (M_h/M_⊙)_z=0 ~ 14.5–15 with a large amount of mass apparently already in place at z ~ 4.57. An exhaustive comparison was made between the properties of various spectroscopic and photometric member samples and matched samples of galaxies inhabiting less dense environments at the same redshifts. Tentative evidence is found for a fractional excess of older galaxies more massive in their stellar content amongst the member samples relative to the coeval field, an observation which suggests the pervasive early onset of vigorous star formation for proto-cluster galaxies. No evidence is found for the differences in the star formation rates (SFRs) of member and coeval field galaxies either through estimating by means of the rest-frame ultraviolet or through separately stacking extremely deep Very Large Array 3 GHz imaging for both samples. Additionally, no evidence for pervasive strong active galactic nuclei (AGN) activity is observed in either environment. Analysis of Hubble Space Telescope images of both sets of galaxies as well as their immediate surroundings provides weak evidence for an elevated incidence of galaxy–galaxy interaction within the bounds of the proto-cluster. The stacked and individual spectral properties of the two samples are compared, with a definite suppression of Lyα seen in the average member galaxy relative to the coeval field (f_esc, Lyα = 1.8_−1.7 ^+0.3% and 4.0_−0.8 ^+1.0%, respectively). This observation along with other lines of evidence leads us to infer the possible presence of a large, cool, diffuse medium within the proto-cluster environment evocative of a nascent intracluster medium forming in the early universe. Less
Keywords (english)
Languageenglish
Publication typeScientific paper - Original scientific paper
Publication statusPublished
Peer reviewPeer review - international
Publication versionPublished version
Journal titleAstronomy and Astrophysics
Numberingvol. 615, A77
p-ISSN0004-6361
e-ISSN1432-0746
DOIhttps://doi.org/10.1051/0004-6361/201730870
URN:NBNurn:nbn:hr:217:319458
Publication2018
Document URLhttps://www.aanda.org/articles/aa/abs/2018/07/aa30870-17/aa30870-17.html
Type of resourceText
Access conditionsOpen access
Terms of useLicence In copyright icon
Public note© ESO 2018. Received 25 March 2017; Accepted 3 January 2018; Published online: 17 July 2018.
Created on2020-03-01 11:59:50
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