FRINK Linked Data Fragments server

Matches in SemOpenAlex for { <https://semopenalex.org/work/W1844053863> ?p ?o ?g. }

• W1844053863 endingPage "3615" @default.
• W1844053863 startingPage "3601" @default.
• W1844053863 abstract "Observations of star-forming galaxies at high z have suggested discrepancies in the inferred star formation rates (SFRs) either between data and models or between complementary measures of the SFR. These putative discrepancies could all be alleviated if the stellar initial mass function (IMF) is systematically weighted towards more high-mass star formation in rapidly star-forming galaxies. Here, we explore how the IMF might vary under the central assumption that the turnover mass in the IMF, ⁠, scales with the Jeans mass in giant molecular clouds (GMCs), ⁠. We employ hydrodynamic simulations of galaxies coupled with radiative transfer models to predict how the typical GMC Jeans mass, and hence the IMF, varies with galaxy properties. We then study the impact of such an IMF on the star formation law, the SFR–M* relation, sub-millimetre galaxies (SMGs) and the cosmic SFR density. Our main results are: the H2 mass-weighted Jeans mass in a galaxy scales well with the SFR when the SFR is greater than a few M⊙ yr−1. Stellar population synthesis modelling shows that this results in a non-linear relation between SFR and Lbol, such that SFR ⁠. Using this model relation, the inferred SFR of local ultraluminous infrared galaxies decreases by a factor of ∼2, and that of high-z SMGs decreases by a factor of ∼3–5. At z∼ 2, this results in a lowered normalization of the SFR–M* relation in better agreement with models, a reduced discrepancy between the observed cosmic SFR density and stellar mass density evolution, and SMG SFRs that are easier to accommodate in current hierarchical structure formation models. It further results in a Kennicutt–Schmidt star formation law with a slope of ∼1.6 when utilizing a physically motivated form for the CO–H2 conversion factor that varies with galaxy physical property. While each of the discrepancies considered here could be alleviated without appealing to a varying IMF, the modest variation implied by assuming is a plausible solution that simultaneously addresses numerous thorny issues regarding the SFRs of high-z galaxies." @default.
• W1844053863 created "2016-06-24" @default.
• W1844053863 creator A5057320280 @default.
• W1844053863 creator A5062524975 @default.
• W1844053863 date "2012-05-28" @default.
• W1844053863 modified "2023-10-16" @default.
• W1844053863 title "Cosmological implications of a stellar initial mass function that varies with the Jeans mass in galaxies" @default.
• W1844053863 cites W1487982544 @default.
• W1844053863 cites W1632840073 @default.
• W1844053863 cites W1722809861 @default.
• W1844053863 cites W1851199749 @default.
• W1844053863 cites W1902228950 @default.
• W1844053863 cites W1946983611 @default.
• W1844053863 cites W1964181290 @default.
• W1844053863 cites W1965814985 @default.
• W1844053863 cites W1970058472 @default.
• W1844053863 cites W1972507852 @default.
• W1844053863 cites W1972726718 @default.
• W1844053863 cites W1973939397 @default.
• W1844053863 cites W1975557117 @default.
• W1844053863 cites W1975889887 @default.
• W1844053863 cites W1977439877 @default.
• W1844053863 cites W1977843574 @default.
• W1844053863 cites W1977927435 @default.
• W1844053863 cites W1979348280 @default.
• W1844053863 cites W1980904486 @default.
• W1844053863 cites W1981829125 @default.
• W1844053863 cites W1982598834 @default.
• W1844053863 cites W1983324871 @default.
• W1844053863 cites W1983680153 @default.
• W1844053863 cites W1983772994 @default.
• W1844053863 cites W1984072856 @default.
• W1844053863 cites W1985952407 @default.
• W1844053863 cites W1988544098 @default.
• W1844053863 cites W1995047289 @default.
• W1844053863 cites W1995088170 @default.
• W1844053863 cites W1997662069 @default.
• W1844053863 cites W2000566616 @default.
• W1844053863 cites W2001085255 @default.
• W1844053863 cites W2001401569 @default.
• W1844053863 cites W2001571758 @default.
• W1844053863 cites W2003858398 @default.
• W1844053863 cites W2006878995 @default.
• W1844053863 cites W2009802717 @default.
• W1844053863 cites W2010017683 @default.
• W1844053863 cites W2011087021 @default.
• W1844053863 cites W2013627946 @default.
• W1844053863 cites W2016759553 @default.
• W1844053863 cites W2017223734 @default.
• W1844053863 cites W2017868275 @default.
• W1844053863 cites W2019594817 @default.
• W1844053863 cites W2020814246 @default.
• W1844053863 cites W2023344562 @default.
• W1844053863 cites W2023793647 @default.
• W1844053863 cites W2028093813 @default.
• W1844053863 cites W2032317739 @default.
• W1844053863 cites W2032732270 @default.
• W1844053863 cites W2034608771 @default.
• W1844053863 cites W2037816996 @default.
• W1844053863 cites W2040364743 @default.
• W1844053863 cites W2040759695 @default.
• W1844053863 cites W2041542911 @default.
• W1844053863 cites W2042150149 @default.
• W1844053863 cites W2043279355 @default.
• W1844053863 cites W2044158175 @default.
• W1844053863 cites W2047272174 @default.
• W1844053863 cites W2048274049 @default.
• W1844053863 cites W2048414711 @default.
• W1844053863 cites W2048527892 @default.
• W1844053863 cites W2051530685 @default.
• W1844053863 cites W2056911569 @default.
• W1844053863 cites W2056995861 @default.
• W1844053863 cites W2058746963 @default.
• W1844053863 cites W2063090834 @default.
• W1844053863 cites W2069524830 @default.
• W1844053863 cites W2074037441 @default.
• W1844053863 cites W2074042204 @default.
• W1844053863 cites W2075164673 @default.
• W1844053863 cites W2091161890 @default.
• W1844053863 cites W2098564368 @default.
• W1844053863 cites W2100514692 @default.
• W1844053863 cites W2103144440 @default.
• W1844053863 cites W2104312657 @default.
• W1844053863 cites W2105539746 @default.
• W1844053863 cites W2105954496 @default.
• W1844053863 cites W2107436274 @default.
• W1844053863 cites W2109329782 @default.
• W1844053863 cites W2116303790 @default.
• W1844053863 cites W2116466430 @default.
• W1844053863 cites W2125142401 @default.
• W1844053863 cites W2125977823 @default.
• W1844053863 cites W2126700402 @default.
• W1844053863 cites W2130165725 @default.
• W1844053863 cites W2132750943 @default.
• W1844053863 cites W2134029361 @default.
• W1844053863 cites W2134344182 @default.
• W1844053863 cites W2138282692 @default.
• W1844053863 cites W2139681095 @default.

• next