prikaz prve stranice dokumenta (Sub)millimetre interferometric imaging of a sample of COSMOS/AzTEC submillimetre galaxies. III. Environments
  Download
PDF 9.57 MB
Scientific paper - Original scientific paper
(Sub)millimetre interferometric imaging of a sample of COSMOS/AzTEC submillimetre galaxies. III. Environments
Astronomy and Astrophysics, 597 (2017); A4. https://doi.org/10.1051/0004-6361/201526989
Smolčić, Vernesa; Miettinen, Oscari; Tomičić, Neven; Zamorani, G.; Finoguenov, A.; Lemaux, B. C.; Aravena, M.; Capak, P.; Chiang, Y.-K.; Civano, F.; Delvecchio, I.; Ilbert, O.; Jurlin, N.; Karim, A.; Laigle, C.; Le Fèvre, O.; Marchesi, S.; McCracken, H. J.; Riechers, D. A.; Salvato, M.; Schinnerer, E.; Tasca, L.; Toft, S. More authors...

Cite this document

Smolčić, V., Miettinen, O., Tomičić, N., Zamorani, G., Finoguenov, A., Lemaux, B. C. ... Toft, S. (2017). (Sub)millimetre interferometric imaging of a sample of COSMOS/AzTEC submillimetre galaxies. III. Environments. Astronomy and Astrophysics, 597.. doi: 10.1051/0004-6361/201526989

Smolčić, Vernesa, et al. "(Sub)millimetre interferometric imaging of a sample of COSMOS/AzTEC submillimetre galaxies. III. Environments." Astronomy and Astrophysics, vol. 597, 2017. https://doi.org/10.1051/0004-6361/201526989

Smolčić, Vernesa, Oscari Miettinen, Neven Tomičić, G. Zamorani, A. Finoguenov, B. C. Lemaux, M. Aravena, et al. "(Sub)millimetre interferometric imaging of a sample of COSMOS/AzTEC submillimetre galaxies. III. Environments." Astronomy and Astrophysics 597 (2017). https://doi.org/10.1051/0004-6361/201526989

Smolčić, V., et al. (2017) '(Sub)millimetre interferometric imaging of a sample of COSMOS/AzTEC submillimetre galaxies. III. Environments', Astronomy and Astrophysics, 597. doi: 10.1051/0004-6361/201526989

Smolčić V, Miettinen O, Tomičić N, Zamorani G, Finoguenov A, Lemaux BC, and sur.. (Sub)millimetre interferometric imaging of a sample of COSMOS/AzTEC submillimetre galaxies. III. Environments. Astronomy and Astrophysics [Internet]. 2017 [cited 2024 April 16];597. doi: 10.1051/0004-6361/201526989

V. Smolčić, et al., "(Sub)millimetre interferometric imaging of a sample of COSMOS/AzTEC submillimetre galaxies. III. Environments", Astronomy and Astrophysics, vol. 597, 2017. [Online]. Available at: https://urn.nsk.hr/urn:nbn:hr:217:570144. [Accessed: 16 April 2024]

Please login to the repository to save this object to your list.
Metadata
Title (english)(Sub)millimetre interferometric imaging of a sample of COSMOS/AzTEC submillimetre galaxies. III. Environments
AuthorVernesa Smolčić
MBZ: 336180
AuthorOscari Miettinen
AuthorNeven Tomičić
AuthorG. Zamorani
AuthorA. Finoguenov
AuthorB. C. Lemaux
AuthorM. Aravena
AuthorP. Capak
AuthorY.-K. Chiang
AuthorF. Civano
AuthorI. Delvecchio
AuthorO. Ilbert
AuthorN. Jurlin
AuthorA. Karim
AuthorC. Laigle
AuthorO. Le Fèvre
AuthorS. Marchesi
AuthorH. J. McCracken
AuthorD. A. Riechers
AuthorM. Salvato
AuthorE. Schinnerer
AuthorL. Tasca
AuthorS. Toft
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)
We investigate the environment of 23 submillimetre galaxies (SMGs) drawn from a signal-to-noise (S/N)-limited sample of SMGs originally discovered in the James Clerk Maxwell Telescope (JCMT)/AzTEC 1.1 mm continuum survey of a Cosmic Evolution Survey (COSMOS) subfield and then followed up with the Submillimetre Array and Plateau de Bure Interferometer at 890 μm and 1.3 mm, respectively. These SMGs already have well- defined multiwavelength counterparts and redshifts. We also analyse the environments of four COSMOS SMGs spectroscopically confirmed to lie at redshifts z_(spec) > 4.5, and one at z_(spec) = 2.49 resulting in a total SMG sample size of 28. We search for overdensities using the COSMOS photometric redshifts based on over 30 UV- NIR photometric measurements including the new UltraVISTA data release 2 and Spitzer/SPLASH data, and reaching an accuracy of σ_(Δz/ (1 + z)) = 0.0067 (0.0155) at z < 3.5 (>3.5). To identify overdensities we apply the Voronoi tessellation analysis, and estimate the redshift-space overdensity estimator δ_g as a function of distance from the SMG and/or overdensity centre. We test and validate our approach via simulations, X-ray detected groups or clusters, and spectroscopic verifications using VUDS and zCOSMOS catalogues which show that even with photometric redshifts in the COSMOS field we can efficiently retrieve overdensities out to z ≈ 5. Our results yield that 11 out of 23 (48%) JCMT/AzTEC 1.1 mm SMGs occupy overdense environments. Considering the entire JCMT/AzTEC 1.1 mm S/N ≥ 4 sample and taking the expected fraction of spurious detections into account, this means that 35–61% of the SMGs in the S/N- limited sample occupy overdense environments. We perform an X-ray stacking analysis in the 0.5–2 keV band using a 32″ aperture and our SMG positions, and find statistically significant detections. For our z < 2 subsample we find an average flux of (4.0 ± 0.8) × 10^(-16) erg s^(-1) cm^(-2) and a corresponding total mass of M_(200) = 2.8 × 10^(13)M⊙. The z > 2 subsample yields an average flux of (1.3 ± 0.5) × 10^(-16) erg s^(-1) cm^(-2) and a corresponding total massof M_(200) = 2 × 10^(13)M⊙. Our results suggest a higher occurrence of SMGs occupying overdense environments at z ≥ 3 than at z < 3. This may be understood if highly star-forming galaxies can only be formed in the highest peaks of the density field tracing the most massive dark matter haloes at early cosmic epochs, while at later times cosmic structure may have matured sufficiently that more modest overdensities correspond to sufficiently massive haloes to form SMGs.
Keywords (english)
Languageenglish
Publication typeScientific paper - Original scientific paper
Publication statusPublished
Peer reviewPeer review - international
Publication versionPublished version
Journal titleAstronomy and Astrophysics
Numberingvol. 597, A4
p-ISSN0004-6361
e-ISSN1432-0746
DOIhttps://doi.org/10.1051/0004-6361/201526989
URN:NBNurn:nbn:hr:217:570144
Publication2017
Document URLhttps://www.aanda.org/articles/aa/abs/2017/01/aa26989-15/aa26989-15.html
Type of resourceText
Access conditionsOpen access
Terms of useLicence In copyright icon
Public note© 2016 ESO. Received: 17 July 2015; Accepted: 4 April 2016; Published online 19 December 2016.
Created on2020-02-27 21:32:31