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Traditional spectral energy distribution (SED) fitting codes used to derive galaxy physical properties are often uncertain at the factor of a few level owing to uncertainties in galaxy star formation histories and dust attenuation curves.…

Astrophysics of Galaxies · Physics 2021-08-04 Sankalp Gilda , Sidney Lower , Desika Narayanan

I review the effects of dust, both in absorption and in emission, on the spectral energy distributions (SEDs) of Local star-forming galaxies. The energy balance between the stellar light absorbed by dust at UV-optical-nearIR wavelengths and…

Astrophysics · Physics 2009-10-31 Daniela Calzetti

We provide a library of some 7000 SEDs for starbursts and ultra luminous galaxies (http://www.eso.org/~rsiebenm/sb_models). Its purpose is to quickly obtain estimates of the basic parameters, such as luminosity, size and dust or gas mass…

Astrophysics · Physics 2007-05-23 Ralf Siebenmorgen , Endrik Kruegel

[Abridged] In high density environment, the gas content of galaxies is stripped, leading to a rapid quenching of their star formation activity. This dramatic environmental effect is generally not taken into account in the SFHs usually…

We present a new method to classify the broad band optical-NIR spectral energy distributions (SEDs) of galaxies using three shape parameters (super-colours) based on a Principal Component Analysis of model SEDs. As well as providing a…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-18 Vivienne Wild , Omar Almaini , Michele Cirasuolo , Jim Dunlop , Ross McLure , Rebecca Bowler , Joao Ferreira , Emma Bradshaw , Robert Chuter , Will Hartley

We present a method to analyze the spectral energy distributions (SEDs) of young stellar objects (YSOs). Our approach is to fit data with pre-computed 2-D radiation transfer models spanning a large region of parameter space. This allows us…

Astrophysics · Physics 2010-04-06 Thomas P. Robitaille , Barbara A. Whitney , Remy Indebetouw , Kenneth Wood

The cosmic spectral energy distribution (CSED) is the total emissivity as a function of wavelength of galaxies in a given cosmic volume. We compare the observed CSED from the UV to the submm to that computed from the EAGLE cosmological…

Astrophysics of Galaxies · Physics 2019-02-13 Maarten Baes , Ana Trčka , Peter Camps , Angelos Nersesian , James Trayford , Tom Theuns , Wouter Dobbels

We introduce the Dense Basis method for Spectral Energy Distribution (SED) fitting. It accurately recovers traditional SED parameters, including M$_*$, SFR and dust attenuation, and reveals previously inaccessible information about the…

Astrophysics of Galaxies · Physics 2017-04-12 Kartheik G. Iyer , Eric Gawiser

We combine Herschel PACS and SPIRE maps of the full 2 deg^2 COSMOS field with existing multi-wavelength data to obtain template and model-independent optical-to-far-infrared spectral energy distributions (SEDs) for 4,218 Herschel-selected…

We analyse the joint distribution of dust attenuation and projected axis ratios, together with galaxy size and surface brightness profile information, to infer lessons on the dust content and star/dust geometry within star-forming galaxies…

Cosmological galaxy formation simulations are still limited by their spatial/mass resolution and cannot model from first principles some of the processes, like star formation, that are key in driving galaxy evolution. As a consequence they…

Astrophysics of Galaxies · Physics 2022-03-02 Andrea V. Macciò , Mohamad Ali-Dib , Pavle Vulanović , Hind Al Noori , Fabian Walter , Nico Krieger , Tobias Buck

This letter utilizes composite spectral energy distributions (SEDs) constructed from NEWFIRM Medium-Band Survey photometry to constrain the dust attenuation curve in 0.5<z<2.0 galaxies. Based on similarities between the full SED shapes…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-16 Mariska Kriek , Charlie Conroy

We use the combined GALFORM semi-analytical model of galaxy formation and GRASIL spectrophotometric code to investigate the properties of galaxies selected via their sub-mm emission. Our fiducial model has previously been shown to fit the…

HII regions play a crucial role in the measurement of the chemical composition of the interstellar medium and provide fundamental data about element abundances that constrain models of galactic chemical evolution. Discrepancies that still…

Solar and Stellar Astrophysics · Physics 2015-11-04 J. A. Weber , A. W. A. Pauldrach , T. L. Hoffmann

Recent years have seen growing interest in post-processing cosmological simulations with radiative transfer codes to predict observable fluxes for simulated galaxies. However, this can be slow, and requires a number of assumptions in cases…

Astrophysics of Galaxies · Physics 2022-12-07 R. K. Cochrane , C. C. Hayward , D. Angles-Alcazar , R. S. Somerville

We present three-dimensional, self-consistent radiative transfer solutions with a new Monte Carlo radiative equilibrium code. The code, RADISHE ($\bf{RAD}$iative transfer $\bf{I}$n $\bf{S}$moothed particle $\bf{H}$ydrodynamics and…

Astrophysics · Physics 2009-06-23 Sukanya Chakrabarti , Barbara Whitney

Recent works have suggested that energy balance spectral energy distribution (SED) fitting codes may be of limited use for studying high-redshift galaxies for which the observed ultraviolet and far-infrared emission are offset (spatially…

Astrophysics of Galaxies · Physics 2023-09-18 P. Haskell , D. J. B. Smith , R. K. Cochrane , C. C. Hayward , D. Anglés-Alcázar

While conventional Type Ia supernova (SN Ia) cosmology analyses rely primarily on rest-frame optical light curves to determine distances, SNe Ia are excellent standard candles in near-infrared (NIR) light, which is significantly less…

Cosmology and Nongalactic Astrophysics · Physics 2021-12-15 Kaisey S. Mandel , Stephen Thorp , Gautham Narayan , Andrew S. Friedman , Arturo Avelino

JWST observations have suggested that some high-redshift galaxies may be ultra-massive, thereby challenging standard models of early galaxy formation and cosmology. We analyse the stellar masses using different modelling assumptions and…

Over the past few years ALMA has detected dust-rich galaxies whose cold dust emission is spatially disconnected from the UV rest-frame emission. This represents a challenge for modeling their spectral energy distributions with codes based…

Astrophysics of Galaxies · Physics 2019-12-04 Buat , V. , Ciesla , M. , Boquien , M. , Malek , K. , Burgarella , D