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We present a novel method to model galactic scale star formation and the resulting emission from star clusters and the multi-phase interstellar medium. We combine global parameters, such as SFR and CMF, with {\sc warpfield} which provides a…

Astrophysics of Galaxies · Physics 2020-09-02 E. W. Pellegrini , S. Reissl , D. Rahner , R. S. Klessen , S. C. O. Glover , R. Pakmor , R. Herrera-Camus , R. J. J. Grand

Through an extensive set of realistic synthetic observations (produced in Paper I), we assess in this part of the paper series (Paper III) how the choice of observational techniques affects the measurement of star-formation rates (SFRs) in…

Solar and Stellar Astrophysics · Physics 2017-11-01 Christine M. Koepferl , Thomas P. Robitaille , James E. Dale

Star-formation rates (SFRs) of galaxies are commonly calculated by converting the measured Halpha luminosities (L_Halpha) into current SFRs. This conversion is based on a constant initial mass function (IMF) independent of the total SFR. As…

Astrophysics · Physics 2007-09-12 Jan Pflamm-Altenburg , Carsten Weidner , Pavel Kroupa

Here we present a full description of the integrated galaxy-wide initial mass function (IGIMF) theory in terms of the optimal sampling and compare it with available observations. Optimal sampling is the method we use to discretize the IMF…

Astrophysics of Galaxies · Physics 2017-11-29 Z. Yan , T. Jerabkova , P. Kroupa

We present a new method to determine the star formation and metal enrichment histories of any resolved stellar system. This method is based on the fact that any observed star in a colour-magnitude diagram will have a certain probability of…

Astrophysics of Galaxies · Physics 2015-06-11 Emma E. Small , David Bersier , Maurizio Salaris

Understanding how and when galaxies formed stars over the history of the Universe is fundamental to the study of galaxy evolution. The star formation histories (SFHs) of galaxies in the local Universe can be measured with high precision…

Despite the fundamental importance of the Milky Way's star formation history (SFH) and initial mass function (IMF), their consistent derivation remains elusive. We aim to simultaneously infer the IMF and the SFH of the Galactic disc…

Astrophysics of Galaxies · Physics 2025-05-21 Marc del Alcázar-Julià , Francesca Figueras , Annie C. Robin , Olivier Bienaymé , Friedrich Anders

We present the eddington bias corrected Specific Star Formation Rate Function (sSFRF) at different stellar mass scales from a sub-sample of the Sloan Digital Sky Survey Data Release DR7 (SDSS), which is considered complete both in terms of…

We investigate the ability of spectroscopic techniques to yield realistic star formation histories (SFHs) for the bulges of spiral galaxies based on a comparison with their observed broadband colors. Full spectrum fitting to optical spectra…

Cosmology and Nongalactic Astrophysics · Physics 2015-05-19 Lauren A. MacArthur , Michael McDonald , Stephane Courteau , J. Jesus Gonzalez

We investigate the time evolution and spatial variation of the stellar initial mass function (IMF) in star-forming disk galaxies by using chemodynamical simulations with an IMF model depending both on local densities and metallicities…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-12 Kenji Bekki , Gerhardt R. Meurer

We present theoretical surface-brightness fluctuations (SBF) amplitudes for single-burst stellar populations of young and intermediate age ($25 Myr \leq t \leq 5 Gyr$), and $Z=0.0003$, 0.001, 0.004, 0.008, 0.01, 0.02, and 0.04. We pay…

Astrophysics · Physics 2008-11-26 G. Raimondo , E. Brocato , M. Cantiello , M. Capaccioli

We examine self-consistent parameterizations of the high-mass stellar population and resulting feedback, including mechanical, radiative, and chemical feedback, as we understand them locally. To date, it appears that the massive star…

Astrophysics · Physics 2007-05-23 M. S. Oey , C. J. Clarke

We study the evolution of 82302 star-forming (SF) galaxies from the SDSS. Our main goals are to explore new ways of handling star formation histories (SFH) obtained with our publicly available spectral synthesis code STARLIGHT, and apply…

The surface brightness fluctuation (SBF) technique is one of the distance measurement methods that has been applied on the low surface brightness galaxy NGC 1052-DF2 yielding a distance of about 20 Mpc implying it to be a dark matter…

Astrophysics of Galaxies · Physics 2021-04-13 Akram Hasani Zonoozi , Hosein Haghi , Pavel Kroupa

We present coarse but robust star formation histories (SFHs) derived from spectro-photometric data of the Carnegie-Spitzer-IMACS Survey, for 22,494 galaxies at 0.3<z<0.9 with stellar masses of 10^9 Msun to 10^12 Msun. Our study moves beyond…

We present photometry and long-slit spectroscopy for 12 S0 and spiral galaxies selected from the Catalogue of Isolated Galaxies. The structural parameters of the sample galaxies are derived from the Sloan Digital Sky Survey i-band images by…

Astrophysics of Galaxies · Physics 2016-10-05 L. Morelli , M. Parmiggiani , E. M. Corsini , L. Costantin , E. Dalla Bontà , J. Mèndez-Abreu , A. Pizzella

We analyze a sample of tens of thousands of spectra of halo turnoff stars, obtained with the optical spectrographs of the Sloan Digital Sky Survey (SDSS), to characterize the stellar halo population "in situ" out to a distance of a few tens…

As the number of gravitational-wave detections grows, the merger rate of binary black holes (BBHs) can help us to constrain their formation, the properties of their progenitors, and their birth environment. Here, we aim to address the…

High Energy Astrophysical Phenomena · Physics 2025-06-24 Cecilia Sgalletta , Michela Mapelli , Lumen Boco , Filippo Santoliquido , M. Celeste Artale , Giuliano Iorio , Andrea Lapi , Mario Spera

Few topics in astronomy initiate such vigorous discussion as whether or not the initial mass function (IMF) of stars is universal, or instead sensitive to the initial conditions of star formation. The distinction is of critical importance:…

Solar and Stellar Astrophysics · Physics 2010-12-01 Nate Bastian , Kevin R. Covey , Michael R. Meyer

Recent versions of the observed cosmic star-formation history (SFH) have resolved an inconsistency with the stellar mass density history. We show that the revised SFH also scales up the delay-time distribution (DTD) of Type Ia supernovae…

High Energy Astrophysical Phenomena · Physics 2017-10-18 Dan Maoz , Or Graur