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The Redshift and Star Formation Mode of AzTEC2: A Pair of Massive Galaxies at z = 4.63
Astrophysical Journal, 890 (2020), 2; 171. https://doi.org/10.3847/1538-4357/ab6dec
Jiménez-Andrade, E. F.; Zavala, J. A.; Magnelli, B.; Casey, C. M.; Liu, D.; Romano- Díaz, E.; Schinnerer, E.; Harrington, K.; Aretxaga, I.; Karim, A.; Staguhn, J.; Burnham, A. D.; Montaña, A.; Smolčić, Vernesa; Yun, M.; Bertoldi, F.; Hughes, D. Više autora...

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Jiménez Andrade, E. F., Zavala, J. A., Magnelli, B., Casey, C. M., Liu, D., Romano Díaz, E. ... Hughes, D. (2020). The Redshift and Star Formation Mode of AzTEC2: A Pair of Massive Galaxies at z = 4.63. Astrophysical Journal, 890. (2). doi: 10.3847/1538-4357/ab6dec

Jiménez Andrade, E. F., et al. "The Redshift and Star Formation Mode of AzTEC2: A Pair of Massive Galaxies at z = 4.63." Astrophysical Journal, vol. 890, br. 2, 2020. https://doi.org/10.3847/1538-4357/ab6dec

Jiménez Andrade, E. F., J. A. Zavala, B. Magnelli, C. M. Casey, D. Liu, E. Romano Díaz, E. Schinnerer, et al. "The Redshift and Star Formation Mode of AzTEC2: A Pair of Massive Galaxies at z = 4.63." Astrophysical Journal 890, br. 2 (2020). https://doi.org/10.3847/1538-4357/ab6dec

Jiménez Andrade, E. F., et al. (2020) 'The Redshift and Star Formation Mode of AzTEC2: A Pair of Massive Galaxies at z = 4.63', Astrophysical Journal, 890(2). doi: 10.3847/1538-4357/ab6dec

Jiménez Andrade EF, Zavala JA, Magnelli B, Casey CM, Liu D, Romano Díaz E, i sur.. The Redshift and Star Formation Mode of AzTEC2: A Pair of Massive Galaxies at z = 4.63. Astrophysical Journal [Internet]. 2020. [pristupljeno 17.04.2024.];890(2). doi: 10.3847/1538-4357/ab6dec

E. F. Jiménez Andrade, et al., "The Redshift and Star Formation Mode of AzTEC2: A Pair of Massive Galaxies at z = 4.63", Astrophysical Journal, vol. 890, br. 2, 2020. [Online]. Dostupno na: https://urn.nsk.hr/urn:nbn:hr:217:915507. [Citirano: 17.04.2024.]

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Naslov (engleski)The Redshift and Star Formation Mode of AzTEC2: A Pair of Massive Galaxies at z = 4.63
AutorE. F. Jiménez-Andrade
AutorJ. A. Zavala
AutorB. Magnelli
AutorC. M. Casey
AutorD. Liu
AutorE. Romano- Díaz
AutorE. Schinnerer
AutorK. Harrington
AutorI. Aretxaga
AutorA. Karim
AutorJ. Staguhn
AutorA. D. Burnham
AutorA. Montaña
AutorVernesa Smolčić
MBZ: 336180
AutorM. Yun
AutorF. Bertoldi
AutorD. Hughes
Autorova ustanovaSveučilište u Zagrebu
Prirodoslovno-matematički fakultet
(Fizički odsjek)
Znanstveno / umjetničko
područje, polje i grana		PRIRODNE ZNANOSTI
Fizika
Astronomija i astrofizika
Sažetak (engleski)
We combine observations from the Atacama Large Millimeter/submillimeter Array and the NOrthern Extended Millimeter Array to assess the redshift and to study the star formation conditions in AzTEC2, one of the brightest submillimeter galaxies (SMGs) in the COSMOS field (S_1.1mm = 10.5 ± 1.4 mJy). Our high-resolution observations confirm that AzTEC2 splits into two components (namely AzTEC2-A and AzTEC2-B) for which we detect [C II] and ^12CO(5 → 4) line emission, implying a redshift of 4.626 ± 0.001 (4.633 ± 0.001) for AzTEC2-A (AzTEC2-B) and ruling out previous associations with a galaxy at z ~ 1. We use the ^12CO(5 → 4) line emission and adopt typical SMG-like gas excitation conditions to estimate the molecular gas mass, which is M_gas (α_CO/2.5) = 2.1 ± 0.4 x 10^11 M_⊙ for AzTEC2- A, and a factor four lower for AzTEC2-B. With the infrared-derived star formation rate of AzTEC2-A (1920 ± 100 M_⊙ yr^-1 ) and AzTEC2-B (710 ± 35 M_⊙ yr^−1 ), they both will consume their current gas reservoir within (30–200) Myr. We find evidence of a rotation- dominated [C II] disk in AzTEC2-A, with a deprojected rotational velocity of v_rot(i = 39°) = 660 ± 130 km s^−1 , velocity dispersion ≲ 100 km s^−1 , and dynamical mass of M_dyn (i = 39°) = 2.6^+1.2_-0.9 x 10^11 M_⊙. We propose that an elevated gas accretion rate from the cosmic web might be the main driver of the intense levels of star formation in AzTEC2- A, which might be further enhanced by gravitational torques induced by its minor companion (AzTEC2- B). These results strengthen the picture whereby the population of single-dish selected SMGs is rather heterogeneous, including a population of pairs of massive, highly active galaxies in a pre-coalescence phase.
Ključne riječi (engleski)
Jezikengleski
Vrsta publikacijeZnanstveni rad - Izvorni znanstveni rad
Status objaveObjavljen
Vrsta recenzijeRecenziran - međunarodna recenzija
Verzija publikacijeObjavljena verzija rada (izdavačev PDF)
Naslov časopisaAstrophysical Journal
Brojčani podacivol. 890, br. 2, 171
p-ISSN0004-637X
e-ISSN1538-4357
DOIhttps://doi.org/10.3847/1538-4357/ab6dec
URN:NBNurn:nbn:hr:217:915507
Datum objave publikacije2020
URL dokumentahttps://iopscience.iop.org/article/10.3847/1538-4357/ab6dec
Vrsta resursaTekst
Prava pristupaOtvoreni pristup
Uvjeti korištenjaIkona licence Zaštićeno autorskim pravom.
Javna napomena© 2020. The American Astronomical Society. All rights reserved. Received 2019 October 28. Accepted 2020 January 16. Published 2020 February 26.
Datum i vrijeme pohrane2020-08-27 20:10:57