Evolution of Interstellar Medium, Star Formation, and Accretion at High Redshift
By N. Scoville, N. Lee, P. V. Vanden Bout, T. Díaz-Santos, D. Sanders, B. Darvish, A. Bongiorno, C. Casey, L. Murchikova, J. Koda and 13 more. 2017
230 citations recorded by the source corpus.
ALMA observations of the long wavelength dust continuum are used to estimate the interstellar medium (ISM) masses in a sample of 708 galaxies at z = 0.3 to 4.5 in the COSMOS field. The galaxy sample has known far-infrared luminosities and, hence, star formation rates (SFRs) and stellar masses ( ) from the optical–infrared spectrum fitting. The galaxies sample SFRs from the main sequence (MS) to 50 times above the MS. The derived ISM masses are used to determine the dependence of gas mass on redshift, , and specific SFR (sSFR) relative to the MS. The ISM masses increase approximately with the 0.63 power of the rate of increase in SFRs with redshift and the 0.32 power of the sSFR/sSFRMS. The SF efficiencies also increase as the 0.36 power of the SFR redshift evolution and the 0.7 power of the elevation above the MS; thus the increased activities at early epochs are driven by both increased ISM masses and SF efficiency. Using the derived ISM mass function, we estimate the accretion rates of gas required to maintain continuity of the MS evolution ( yr−1 at z > 2.5). Simple power-law dependencies are similarly derived for the gas accretion rates. We argue that the overall evolution of galaxies is driven by the rates of gas accretion. The cosmic evolution of total ISM mass is estimated and linked to the evolution of SF and active galactic nucleus activity at early epochs.
Subfields: Astronomy and Astrophysics, Instrumentation
View Paper: https://www.semanticscholar.org/paper/25944ba59f51942ab1553f2287c93de636d3eead
How researchers see this paper
The researchers whose trusted networks rank it highest, strongest advocate first. Every researcher gets a different order.
In Astronomy and Astrophysics
In Instrumentation
Citations in the corpus
- COSMOS2020: A Panchromatic View of the Universe to z ∼ 10 from Two Complementary Catalogs (2021, background): “…have been conducted, including extensive spectroscopic coverage (e.g., Lilly et al. 2007; Le Fèvre et al. 2015; van der Wel et al. 2016; Hasinger et al. 2018), integral field spectroscopy (e.g., Förster Schreiber et al. 2009), and ALMA observations (Scoville et al. 2017; Le Fèvre et al. 2019).”
- PHIBSS: Unified Scaling Relations of Gas Depletion Time and Molecular Gas Fractions (2017, methodology): “In comparison, the other large survey of the molecular gas properties in high-z SFGs from 1mm ALMA dust photometry (Scoville et al. 2016, 2017) has <logδMS>=0.5-1 between z=1-3 and thus is even more strongly biased to above MS galaxies.”