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It is well-known that fitting the Color Magnitude Diagrams (CMDs) to the theoretical isochrones is the main method to determine star cluster ages. However, when the CMDs are not available, the Spectral Energy Distribution (SED)-fitting…

Astrophysics of Galaxies · Physics 2018-10-24 Zhou Fan , Zhongmu Li , Gang Zhao

Embedded Young Stellar Objects (YSO) in dense interstellar clouds is treated self-consistently to understand their spectral energy distributions (SED). Radiative transfer calculations in spherical geometry involving the dust as well as the…

Astrophysics · Physics 2009-10-31 Bhaswati Mookerjea , S. K. Ghosh

Panchromatic analysis of galaxy spectral energy distributions, spanning from the ultraviolet to the far-infrared, probes not only the stellar population but also the properties of interstellar dust through its extinction and long-wavelength…

Astrophysics of Galaxies · Physics 2023-09-07 G. T. Jones , E. R. Stanway

The recent discovery of dusty galaxies well into the Epoch of Reionization (redshift $z>6$) poses challenging questions about the properties of the interstellar medium in these pristine systems. By combining state-of-the-art hydrodynamic…

Astrophysics of Galaxies · Physics 2018-04-04 C. Behrens , A. Pallottini , A. Ferrara , S. Gallerani , L. Vallini

We construct an evolutionary spectral energy distribution (SED) model of a starburst region, from the ultraviolet to submillimetre wavelengths. This model allows us to derive the star formation rate, optical depth by dust and apparent…

Astrophysics · Physics 2009-11-07 Toshinobu Takagi , Nobuo Arimoto , Hitoshi Hanami

We observed a test globule, B 335 in U, B, g, r, and I, and together with the 2MASS survey, this data set gives a well-defined spectral energy distribution (SED) of a large number of stars. The SED of each star depends on the interstellar…

Astrophysics of Galaxies · Physics 2011-12-02 Sven Olofsson , Göran Olofsson

We have carried out a detailed modeling of the dust Spectral Energy Distribution (SED) of the nearby, starbursting dwarf galaxy NGC 4214. A key point of our modeling is that we distinguish the emission from (i) HII regions and their…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-03 I. Hermelo , U. Lisenfeld , M. Relano , R. Tuffs , J. Fischera , B. Groves , C. Popescu

We present Herschel/SPIRE images at 250, 350, and 500 {\mu}m of NGC 4244, a typical low-mass, disk-only and edge-on spiral galaxy. The dust disk is clumpy and shows signs of truncation at the break radius of the stellar disk. This disk…

Cosmology and Nongalactic Astrophysics · Physics 2015-06-04 B. W. Holwerda , S. Bianchi , T. Böker , D. Radburn-Smith , R. S. de Jong , M. Baes , P. C. van der Kruit , M. Xilouris , K. D. Gordon , J. J. Dalcanton

Concatenating data from the millimetre regime to the infrared, we have performed spectral energy distribution modelling for 227 of the 405 millimetre continuum sources of Hill et al. (2005) which are thought to contain young massive stars…

Astrophysics · Physics 2009-11-13 T. Hill , C. Pinte , V. Minier , M. G. Burton , M. R. Cunningham

We probe the disk structure of the nearby, massive, edge-on spiral galaxy NGC 891 with sub-arcsecond resolution JHKs-band images covering ~+/-10 kpc in radius and +/-5 kpc in height. We measure intrinsic surface brightness profiles using…

Cosmology and Nongalactic Astrophysics · Physics 2013-07-26 Andrew Schechtman-Rook , Matthew A. Bershady

We have updated our publicly available dust radiative transfer code (HOCHUNK3D) to include new emission processes and various 3-D geometries appropriate for forming stars. The 3-D geometries include warps and spirals in disks, accretion…

Solar and Stellar Astrophysics · Physics 2015-06-16 B. A. Whitney , T. P. Robitaille , J. E. Bjorkman , R. Dong , M. J. Wolff , K. Wood , J. Honor

We study a possibility to detect signatures of brown dwarf companions in a circumstellar disc based on spectral energy distributions (SED). We present the results of SED simulations for a system with a 0.8 $M_{\odot}$ central object and a…

Earth and Planetary Astrophysics · Physics 2017-04-12 Olga V. Zakhozhay

Spectral energy distribution (SED) analyses, that include new millimeter (mm) to far-infrared (FIR) observations, obtained with continuum instruments on the Nobeyama and James Clerk Maxwell Telescopes and Infrared Space Observatory (ISO),…

Astrophysics · Physics 2009-11-10 Lerothodi L. Leeuw , Anne E. Sansom , E. Ian Robson , Martin Haas , Nario Kuno

The spectral energy distributions (SEDs), spanning the mid-infrared to millimeter wavelengths, of a sample of 13 high-mass protostellar objects (HMPOs) were studied using a large archive of 2-D axisymmetric radiative transfer models.…

Astrophysics · Physics 2009-11-13 F. M. Fazal , T. K. Sridharan , K. Qiu , T. P. Robitaille , B. A. Whitney , Q. Zhang

We use spectrally dispersed near-IR interferometry data to constrain the temperature profiles of sub-AU-sized regions of 11 Herbig Ae/Be sources. We find that a single-temperature ring does not reproduce the data well. Rather, models…

Astrophysics · Physics 2008-11-26 J. A. Eisner , E. I. Chiang , B. F. Lane , R. L. Akeson

We use high-resolution UV-to-optical imaging from the Hubble Space Telescope (HST) to construct spatially resolved spectral energy distributions (SEDs) for seven nearby ($z<0.07$) hard (14--195$\,$keV) X-ray-selected broad-line active…

Context. The structure of the inner parts of Be star disks (20 stellar radii) is well explained by the viscous decretion disk (VDD) model, which is able to reproduce the observable properties of most of the objects studied so far. The outer…

We report spatially resolved, spectrally dispersed N-band observations of the B[e] star Hen 3-1191 with the MIDI instrument of the Very Large Telescope Interferometer. The object is resolved with a 40 m baseline and has an equivalent…

Astrophysics · Physics 2009-11-13 Régis Lachaume , Thomas Preibisch , Thomas Driebe , Gerd Weigelt

We studied the disc of the unclassified B[e] star HD 50138, in order to explore its structure, and to find indications for the evolutionary status of this system, whether it is a young Herbig Be or a post-main-sequence star. Using high…

Solar and Stellar Astrophysics · Physics 2019-02-26 J. Varga , T. Gerják , P. Ábrahám , L. Chen , K. Gabányi , Á. Kóspál