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Scientific paper - Original scientific paper
The Redshift and Nature of AzTEC/COSMOS 1: A Starburst Galaxy at z = 4.6
Astrophysical Journal Letters, 731 (2011), 2; L27. https://doi.org/10.1088/2041-8205/731/2/L27
Smolčić, Vernesa; Capak, P.; Blain, A. W.; Salvato, M.; Morić, I.; Riechers, D. A.; Sheth, K.; Murphy, E.; Masters, D.; Scoville, N. Z.

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Smolčić, V., Capak, P., Blain, A. W., Salvato, M., Morić, I., Riechers, D. A. ... Scoville, N. Z. (2011). The Redshift and Nature of AzTEC/COSMOS 1: A Starburst Galaxy at z = 4.6. Astrophysical Journal Letters, 731. (2). doi: 10.1088/2041-8205/731/2/L27

Smolčić, Vernesa, et al. "The Redshift and Nature of AzTEC/COSMOS 1: A Starburst Galaxy at z = 4.6." Astrophysical Journal Letters, vol. 731, no. 2, 2011. https://doi.org/10.1088/2041-8205/731/2/L27

Smolčić, Vernesa, P. Capak, A. W. Blain, M. Salvato, I. Morić, D. A. Riechers, K. Sheth, E. Murphy, D. Masters and N. Z. Scoville. "The Redshift and Nature of AzTEC/COSMOS 1: A Starburst Galaxy at z = 4.6." Astrophysical Journal Letters 731, no. 2 (2011). https://doi.org/10.1088/2041-8205/731/2/L27

Smolčić, V., et al. (2011) 'The Redshift and Nature of AzTEC/COSMOS 1: A Starburst Galaxy at z = 4.6', Astrophysical Journal Letters, 731(2). doi: 10.1088/2041-8205/731/2/L27

Smolčić V, Capak P, Blain AW, Salvato M, Morić I, Riechers DA, and sur.. The Redshift and Nature of AzTEC/COSMOS 1: A Starburst Galaxy at z = 4.6. Astrophysical Journal Letters [Internet]. 2011 [cited 2025 February 18];731(2). doi: 10.1088/2041-8205/731/2/L27

V. Smolčić, et al., "The Redshift and Nature of AzTEC/COSMOS 1: A Starburst Galaxy at z = 4.6", Astrophysical Journal Letters, vol. 731, no. 2, 2011. [Online]. Available at: https://urn.nsk.hr/urn:nbn:hr:217:911046. [Accessed: 18 February 2025]

Metadata
Title (english)The Redshift and Nature of AzTEC/COSMOS 1: A Starburst Galaxy at z = 4.6
AuthorVernesa Smolčić
AuthorP. Capak
AuthorA. W. Blain
AuthorM. Salvato
AuthorI. Morić
AuthorD. A. Riechers
AuthorK. Sheth
AuthorE. Murphy
AuthorD. Masters
AuthorN. Z. Scoville
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)
Based on broadband/narrowband photometry and Keck DEIMOS spectroscopy, we report a redshift of z = 4.64^(+0.06)_(–0.08) for AzTEC/COSMOS 1, the brightest submillimeter galaxy (SMG) in the AzTEC/COSMOS field. In addition to the COSMOS-survey X-ray to radio data, we report observations of the source with Herschel/PACS (100, 160 μm), CSO/SHARC II (350 μm), and CARMA and PdBI (3 mm). We do not detect CO(5 → 4) line emission in the covered redshift ranges, 4.56-4.76 (PdBI/CARMA) and 4.94-5.02 (CARMA). If the line is within this bandwidth, this sets 3σ upper limits on the gas mass to ≲8 × 10^9 M_☉ and ≲5 × 10^(10) M_☉, respectively (assuming similar conditions as observed in z ~ 2 SMGs). This could be explained by a low CO-excitation in the source. Our analysis of the UV-IR spectral energy distribution of AzTEC 1 shows that it is an extremely young (≲50 Myr), massive (M * ~ 10^(11) M_☉), but compact (≲2 kpc) galaxy, forming stars at a rate of ~1300 M_☉ yr^(–1). Our results imply that AzTEC 1 is forming stars in a "gravitationally bound" regime in which gravity prohibits the formation of a superwind, leading to matter accumulation within the galaxy and further generations of star formation.
Keywords (english)
Languageenglish
Publication typeScientific paper - Original scientific paper
Publication statusPublished
Peer reviewPeer review - international
Publication versionPublished version
Journal titleAstrophysical Journal Letters
Numberingvol. 731, no. 2, L27
p-ISSN2041-8205
e-ISSN2041-8213
DOIhttps://doi.org/10.1088/2041-8205/731/2/L27
URN:NBNurn:nbn:hr:217:911046
Publication2011
Document URLhttps://iopscience.iop.org/article/10.1088/2041-8205/731/2/L27
Type of resourceText
Access conditionsOpen access
Terms of useLicence In copyright icon
Public note© 2011 American Astronomical Society. Received 2010 December 13; accepted 2011 February 15; published 2011 March 25.
Created on2019-11-03 18:18:34