The Main Sequences of Star-Forming Galaxies and Active Galactic Nuclei at High Redshift

Mancuso, C.; Lapi, A.; Shi, Jingjing; Cai, Zhen-Yi; González‐Nuevo, J.; Béthermin, M.; Danese, L.

doi:10.3847/1538-4357/833/2/152

Cited by 58 publications

(81 citation statements)

References 259 publications

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“…An appreciable fraction of the individual, far-IR selected galaxies around z ≈ 2 (highlighted in red) lie above the main sequence, i.e., at SFR values higher than expected on the basis of the average relationship at given M ⋆ . These off-main-sequence objects can be simply interpreted (see Mancuso et al 2016b) as galaxies caught in an early evolutionary stage, and still accumulating their stellar mass. Thus young starforming galaxies are found to be preferentially located above the main sequence or, better, to the left of it.…”

Section: Resultsmentioning

confidence: 99%

Stellar Mass Function of Active and Quiescent Galaxies via the Continuity Equation

Lapi

Mancuso

Bressan

et al. 2017

ApJ

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The continuity equation is developed for the stellar mass content of galaxies, and exploited to derive the stellar mass function of active and quiescent galaxies over the redshift range z ∼ 0 − 8. The continuity equation requires two specific inputs gauged on observations: (i) the star formation rate functions determined on the basis of the latest UV+far-IR/sub-mm/radio measurements; (ii) average star-formation histories for individual galaxies, with different prescriptions for discs and spheroids. The continuity equation also includes a source term taking into account (dry) mergers, based on recent numerical simulations and consistent with observations. The stellar mass function derived from the continuity equation is coupled with the halo mass function and with the SFR functions to derive the star formation efficiency and the main sequence of star-forming galaxies via the abundance matching technique. A remarkable agreement of the resulting stellar mass function for active and quiescent galaxies, of the galaxy main sequence and of the star-formation efficiency with current observations is found; the comparison with data also allows to robustly constrain the characteristic timescales for star formation and quiescence of massive galaxies, the star formation history of their progenitors, and the amount of stellar mass added by in-situ star formation vs. that contributed by external merger events. The continuity equation is shown to yield quantitative outcomes that must be complied by detailed physical models, that can provide a basis to improve the (sub-grid) physical recipes implemented in theoretical approaches and numerical simulations, and that can offer a benchmark for forecasts on future observations with multi-band coverage, as it will become routinely achievable in the era of JWST.

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Section: Resultsmentioning

confidence: 99%

Stellar Mass Function of Active and Quiescent Galaxies via the Continuity Equation

Lapi

Mancuso

Bressan

et al. 2017

ApJ

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“…Theoretical studies have attempted to explain the main sequence as a mere consequence of gas accretion within dark matter halos (e.g., Somerville et al 2008;Lu et al 2014;Cousin et al 2015), but have difficulty in reproducing the evolution of its normalization with cosmic time (Dutton et al 2010;Genel et al 2014;Furlong et al 2015;Sparre et al 2015)-see Mitchell et al (2014) for a thorough discussion of this problem. Other groups have investigated the role of galaxy-black hole coevolution in shaping the star formation main sequence (e.g., Mancuso et al 2016;Kaviraj et al 2017). In any case, a complete theoretical explanation of this relation between stellar mass and instantaneous SFR is still missing.…”

Section: Discussionmentioning

confidence: 99%

Star Formation in Galaxies at z ∼ 4–5 from the SMUVS Survey: A Clear Starburst/Main-sequence Bimodality for Hα Emitters on the SFR–M* Plane

Caputi

Deshmukh

Ashby

et al. 2017

ApJ

141

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Take-down policy If you believe that this document breaches copyright please contact us providing details, and we will remove access to the work immediately and investigate your claim.Downloaded from the University of Groningen/UMCG research database (Pure): http://www.rug.nl/research/portal. For technical reasons the number of authors shown on this cover page is limited to 10 maximum. AbstractWe study a large galaxy sample from the Spitzer Matching Survey of the UltraVISTA ultra-deep Stripes (SMUVS) to search for sources with enhanced 3.6 m m fluxes indicative of strong Hα emission at z 3.9 4.9 = -. We find that the percentage of "Hα excess" sources reaches 37%-40% for galaxies with stellar masses M M log 9 10

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“…2.2). The shaded area shows the average relationship computed as in Mancuso et al (2016b), taking into account the number density of AGNs with different luminosities and the relative time spent by individual objects in different portions of the evolutionary tracks.…”

Section: Further Observational Constraintsmentioning

confidence: 99%

Galaxy Evolution in the Radio Band: The Role of Star-forming Galaxies and Active Galactic Nuclei

Mancuso

Lapi

Prandoni

et al. 2017

ApJ

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105

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We investigate the astrophysics of radio-emitting star-forming galaxies and active galactic nuclei (AGNs), and elucidate their statistical properties in the radio band including luminosity functions, redshift distributions, and number counts at sub-mJy flux levels, that will be crucially probed by next-generation radio continuum surveys. Specifically, we exploit the model-independent approach by Mancuso et al. (2016a,b) to compute the star formation rate functions, the AGN duty cycles and the conditional probability of a star-forming galaxy to host an AGN with given bolometric luminosity. Coupling these ingredients with the radio emission properties associated to star formation and nuclear activity, we compute relevant statistics at different radio frequencies, and disentangle the relative contribution of star-forming galaxies and AGNs in different radio luminosity, radio flux, and redshift ranges. Finally, we highlight that radio-emitting star-forming galaxies and AGNs are expected to host supermassive black holes accreting with different Eddington ratio distributions, and to occupy different loci in the galaxy main sequence diagrams. These specific predictions are consistent with current datasets, but need to be tested with larger statistics via future radio data with multi-band coverage on wide areas, as it will become routinely achievable with the advent of the SKA and its precursors.

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The Main Sequences of Star-Forming Galaxies and Active Galactic Nuclei at High Redshift

Cited by 58 publications

References 259 publications

Stellar Mass Function of Active and Quiescent Galaxies via the Continuity Equation

Stellar Mass Function of Active and Quiescent Galaxies via the Continuity Equation

Star Formation in Galaxies at z ∼ 4–5 from the SMUVS Survey: A Clear Starburst/Main-sequence Bimodality for Hα Emitters on the SFR–M* Plane

Galaxy Evolution in the Radio Band: The Role of Star-forming Galaxies and Active Galactic Nuclei

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