Show simple item record

Files in this item


Item metadata

dc.contributor.authorKroupa, P.
dc.contributor.authorHaslbauer, M.
dc.contributor.authorBanik, I.
dc.contributor.authorNagesh, S. T.
dc.contributor.authorPflamm-Altenburg, J.
dc.identifier.citationKroupa , P , Haslbauer , M , Banik , I , Nagesh , S T & Pflamm-Altenburg , J 2020 , ' Constraints on the star formation histories of galaxies in the Local Cosmological Volume ' , Monthly Notices of the Royal Astronomical Society , vol. 497 , no. 1 , pp. 37-43 .
dc.identifier.otherPURE: 276205712
dc.identifier.otherPURE UUID: 9c5330c2-8440-42c8-bad2-2893bdea5a5f
dc.identifier.otherScopus: 85096959012
dc.identifier.otherORCID: /0000-0002-4123-7325/work/101218066
dc.descriptionIB is supported by an Alexander von Humboldt postdoctoral research fellowship. PK acknowledges support from the Grant Agency of the Czech Republic under grant number 20-21855S. This work benefited from the International Space Science Institute (ISSI/ISSI-BJ) in Bern and Beijing, thanks to the funding of the team ‘Chemical abundances in the ISM: the litmus test of stellar IMF variations in galaxies across cosmic time’ (Donatella Romano and Zhi-Yu Zhang).en
dc.description.abstractThe majority of galaxies with current star formation rates (SFRs), SFRo≥10−3M⊙yr−1⁠, in the Local Cosmological Volume, where observations should be reliable, have the property that their observed SFRo is larger than their average SFR. This is in tension with the evolution of galaxies described by delayed-τ models, according to which the opposite would be expected. The tension is apparent in that local galaxies imply the star formation time-scale τ ≈ 6.7 Gyr, much longer than the 3.5–4.5 Gyr obtained using an empirically determined main sequence at several redshifts. Using models where the SFR is a power law in time of the form ∝(t − t1)η for t1 = 1.8 Gyr (with no stars forming prior to t1) implies that η = 0.18 ± 0.03. This suggested near-constancy of a galaxy’s SFR over time raises non-trivial problems for the evolution and formation time of galaxies, but is broadly consistent with the observed decreasing main sequence with increasing age of the Universe.
dc.relation.ispartofMonthly Notices of the Royal Astronomical Societyen
dc.rightsCopyright 2020 The Author(s). Published by Oxford University Press on behalf of the Royal Astronomical Society. This work has been made available online in accordance with publisher policies or with permission. Permission for further reuse of this content should be sought from the publisher or the rights holder. This is the final published version of the work, which was originally published at
dc.subjectGalaxies: evolutionen
dc.subjectGalaxies: formationen
dc.subjectGalaxies: star formationen
dc.subjectGalaxies: stellar contenten
dc.subjectGalaxy: evolutionen
dc.subjectGalaxy: formationen
dc.subjectQB Astronomyen
dc.subjectQC Physicsen
dc.subjectSpace and Planetary Scienceen
dc.subjectAstronomy and Astrophysicsen
dc.titleConstraints on the star formation histories of galaxies in the Local Cosmological Volumeen
dc.typeJournal articleen
dc.description.versionPublisher PDFen
dc.contributor.institutionUniversity of St Andrews. School of Physics and Astronomyen
dc.description.statusPeer revieweden

This item appears in the following Collection(s)

Show simple item record