prikaz prve stranice dokumenta Gas fraction and depletion time of massive star- forming galaxies at z similar to 3.2: no change in global star formation process out to z > 3
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Scientific paper - Original scientific paper
Gas fraction and depletion time of massive star- forming galaxies at z similar to 3.2: no change in global star formation process out to z > 3
Astrophysical Journal, 833 (2016), 1; 112. https://doi.org/10.3847/1538-4357/833/1/112
Schinnerer, E.; Groves, B.; Sargent, M. T.; Karim, A.; Oesch, P. A.; Magnelli, B.; LeFevre, O.; Tasca, L.; Civano, F.; Cassata, P.; Smolčić, Vernesa

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Schinnerer, E., Groves, B., Sargent, M. T., Karim, A., Oesch, P. A., Magnelli, B. ... Smolčić, V. (2016). Gas fraction and depletion time of massive star- forming galaxies at z similar to 3.2: no change in global star formation process out to z > 3. Astrophysical Journal, 833. (1). doi: 10.3847/1538-4357/833/1/112

Schinnerer, E., et al. "Gas fraction and depletion time of massive star- forming galaxies at z similar to 3.2: no change in global star formation process out to z > 3." Astrophysical Journal, vol. 833, no. 1, 2016. https://doi.org/10.3847/1538-4357/833/1/112

Schinnerer, E., B. Groves, M. T. Sargent, A. Karim, P. A. Oesch, B. Magnelli, O. LeFevre, et al. "Gas fraction and depletion time of massive star- forming galaxies at z similar to 3.2: no change in global star formation process out to z > 3." Astrophysical Journal 833, no. 1 (2016). https://doi.org/10.3847/1538-4357/833/1/112

Schinnerer, E., et al. (2016) 'Gas fraction and depletion time of massive star- forming galaxies at z similar to 3.2: no change in global star formation process out to z > 3', Astrophysical Journal, 833(1). doi: 10.3847/1538-4357/833/1/112

Schinnerer E, Groves B, Sargent MT, Karim A, Oesch PA, Magnelli B, and sur.. Gas fraction and depletion time of massive star- forming galaxies at z similar to 3.2: no change in global star formation process out to z > 3. Astrophysical Journal [Internet]. 2016 [cited 2024 December 23];833(1). doi: 10.3847/1538-4357/833/1/112

E. Schinnerer, et al., "Gas fraction and depletion time of massive star- forming galaxies at z similar to 3.2: no change in global star formation process out to z > 3", Astrophysical Journal, vol. 833, no. 1, 2016. [Online]. Available at: https://urn.nsk.hr/urn:nbn:hr:217:018182. [Accessed: 23 December 2024]

Metadata
Title (english)Gas fraction and depletion time of massive star- forming galaxies at z similar to 3.2: no change in global star formation process out to z > 3
AuthorE. Schinnerer
AuthorB. Groves
AuthorM. T. Sargent
AuthorA. Karim
AuthorP. A. Oesch
AuthorB. Magnelli
AuthorO. LeFevre
AuthorL. Tasca
AuthorF. Civano
AuthorP. Cassata
AuthorVernesa Smolčić
MBZ: 336180
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)
The observed evolution of the gas fraction and its associated depletion time in main-sequence (MS) galaxies provides insights on how star formation proceeds over cosmic time. We report ALMA detections of the rest-frame ~300 μm continuum observed at 240 GHz for 45 massive (〈log(M_⋆(M_⊙))〉 = 10.7), normal star-forming (〈log(sSFR(yr^-1))〉 = -8.6), i.e., MS, galaxies at ≈ 3.2$ in the COSMOS field. From an empirical calibration between cold neutral, i.e., molecular and atomic, gas mass M_gas and monochromatic (rest-frame) infrared luminosity, the gas mass for this sample is derived. Combined with stellar mass M_⋆ and star formation rate (SFR) estimates (from MagPhys fits) we obtain a median gas fraction of μgas=Mgas/M_⋆=1.65_{-0.19}^{+0.18}$ and a median gas depletion time t_depl(Gyr)=M_gas/SFR=0.68_{-0.08}^{+0.07}; correction for the location on the MS will only slightly change the values. The reported uncertainties are the 1σ error on the median. Our results are fully consistent with the expected flattening of the redshift evolution from the 2-SFM (2 star formation mode) framework which empirically prescribes the evolution assuming a universal, log-linear relation between SFR and gas mass coupled to the redshift evolution of the specific star formation rate (sSFR) of MS galaxies. While t_depl shows only a mild dependence on location within the MS, a clear trend of increasing μ_gas across the MS is observed (as known from previous studies). Further, we comment on trends within the MS and (in)consistencies with other studies.
Keywords (english)
Languageenglish
Publication typeScientific paper - Original scientific paper
Publication statusPublished
Peer reviewPeer review - international
Publication versionPublished version
Journal titleAstrophysical Journal
Numberingvol. 833, no. 1, 112
p-ISSN0004-637X
e-ISSN1538-4357
DOIhttps://doi.org/10.3847/1538-4357/833/1/112
URN:NBNurn:nbn:hr:217:018182
Publication2016
Document URLhttps://iopscience.iop.org/article/10.3847/1538-4357/833/1/112
Type of resourceText
Access conditionsOpen access
Terms of useLicence In copyright icon
Public note© 2016. The American Astronomical Society. Received 2016 June 10; revised 2016 October 6; accepted 2016 October 11; published 2016 December 12.
Created on2020-02-24 19:14:44