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Spectra obtained with the Hubble Space Telescope GHRS are combined with high-resolution optical spectra and UV spectra from Copernicus to study the abundances and physical conditions in the diffuse interstellar clouds seen along the line of…

天体物理学 · 物理学 2008-11-26 D. E. Welty , L. M. Hobbs , J. T. Lauroesch , D. C. Morton , L. Spitzer , D. G. York

The luminous blue variable (LBV) stars are peculiar very massive stars. The study of these stellar objects and their surroundings is important for understanding the evolution of massive stars and its effects on the interstellar medium. We…

星系天体物理 · 物理学 2015-06-05 S. Paron , J. A. Combi , A. Petriella , E. Giacani

The ongoing Gaia mission of ESA will provide accurate spatial and kinematical information for a large fraction of stars in the Galaxy. Interstellar extinction and line absorption studies toward a large number of stars at different distances…

星系天体物理 · 物理学 2015-12-22 Tomaž Zwitter , Janez Kos

We present the panchromatic spectral energy distributions (SEDs) of the Local Volume Legacy (LVL) survey which consists of 258 nearby galaxies ($D<$11 Mpc). The wavelength coverage spans the ultraviolet to the infrared (1500 $\textrm{\AA}$…

A notorious problem in astronomy is the recovery of the true shape and spectral energy distribution (SED) of a galaxy despite attenuation by interstellar dust embedded in the same galaxy. This problem has been solved for a few hundred…

星系天体物理 · 物理学 2024-11-14 Jared Siegel , Peter Melchior

The physical properties of galaxies are encoded within their spectral energy distribution and require comparison with models to be extracted. These models must contain a synthetic stellar population and, where infrared data is to be used,…

星系天体物理 · 物理学 2022-06-22 G. T. Jones , E. R. Stanway , A. C. Carnall

The LMC is ideal for studying the co-evolution of planetary nebulae (PNe) and their central stars, in that the debilitating uncertainties of the Galactic PN distance scale and selection biases from attenuation by interstellar dust do not…

天体物理学 · 物理学 2007-05-23 Richard A. Shaw , Letizia Stanghellini , Max Mutchler , Bruce Balick , J. Chris Blades

We introduce a new approach to quantifying dust in galaxies by combining information from the Balmer decrement (BD) and the dust mass ($M_d$). While there is no explicit correlation between these two properties, they jointly probe different…

We compare observations of AGB stars and predictions of the Elitzur & Ivezic (2001) steady-state radiatively driven dusty wind model. The model results are described by a set of similarity functions of a single independent variable, and…

太阳与恒星天体物理 · 物理学 2015-05-18 Zeljko Ivezic , Moshe Elitzur

We combine a semi-analytic model of galaxy formation with simple analytic recipes describing the absorption and re-emission of starlight by dust in the interstellar medium of galaxies. We use the resulting models to predict galaxy counts…

宇宙学与河外天体物理 · 物理学 2015-05-27 R. S. Somerville , R. C. Gilmore , J. R. Primack , A. Dominguez

The high mass loss rates of stars in their asymptotic giant branch (AGB) stage of evolution is one of the most important pathways for mass return from stars to the ISM. In the planetary nebulae (PNe) phase, the ejected material is…

天体物理学 · 物理学 2008-03-28 Joseph L. Hora , Massimo Marengo , Howard A. Smith , Luciano Cerrigone , William B. Latter

We select galaxies in UV rest-frame at z=0, z~0.7 and z~1 together with a sample of LBGs at z~1, the samples are built in order to sample the same range of luminosity at any redshift. The evolution of the IR and UV luminosities with z is…

宇宙学与河外天体物理 · 物理学 2015-05-13 V. Buat , T. T. Takeuchi , D. Burgarella , E. Giovannoli , K. L. Murata

During the late phases of evolution, low-to-intermediate mass stars like our Sun undergo periods of extensive mass loss, returning up to 80% of their initial mass to the interstellar medium. This mass loss profoundly affects the stellar…

太阳与恒星天体物理 · 物理学 2019-03-14 Lynn D. Matthews , Mark J Claussen , Graham M. Harper , Karl M. Menten , Stephen Ridgway

Lada et al. (1994) have described a method for studying the distribution of dust in dark clouds using infrared imaging surveys. In particular they show that the method provides some information about the structure of the gas (dust) on…

天体物理学 · 物理学 2009-10-28 Paolo Padoan , Bernard J. T. Jones , AAke Nordlund

The complex structure of gas, metals, and dust in the interstellar and circumgalactic medium (ISM and CGM, respectively) in star-forming galaxies can be probed by Ly$\alpha$ emission and absorption, low-ionization interstellar (LIS) metal…

The ultraviolet (UV) to sub-millimetre (submm) spectral energy distribution of galaxies can be roughly divided into two sections: the stellar emission (attenuated by dust) at UV to near-infrared wavelengths and dust emission at longer…

星系天体物理 · 物理学 2021-11-10 Wouter Dobbels , Maarten Baes

Observations have demonstrated the presence of substantial amounts of interstellar dust in elliptical galaxies, most of which is believed to be distributed diffusely over the galaxy. Absorption by dust grains has a major impact on the…

天体物理学 · 物理学 2009-10-31 Maarten Baes , Herwig Dejonghe , Sven De Rijcke

The Galactic interstellar turbulence affects the density distribution and star formation. We introduce a new method of measuring interstellar turbulent density spectra by using the dispersion measures (DMs) of a large sample of pulsars.…

星系天体物理 · 物理学 2021-01-06 Siyao Xu , Bing Zhang

We compute the cosmic stellar, dust and neutral gas mass history at $0<z\lesssim3$ using ProSpect spectral energy distribution modelling of $\approx 800 \, 000$ galaxies in the Galaxy and Mass Assembly (GAMA) survey and the Deep…

Interstellar dust plays a central role in shaping the detailed structure of the interstellar medium, thus strongly influencing star formation and galaxy evolution. Dust extinction provides one of the main pillars of our understanding of…