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... We derive several relationships to obtain total IR luminosities from IR monochromatic fluxes, and we compare five different star formation rate (SFR) estimators for H II regions in M81 and M51: the UV, HЮБ, and three estimators based on Spitzer data. ... For the entire M81 galaxy, about 50% of the total SF is obscured by dust. ...

In this gallery are many images of Low Surface Brightness Galaxies which have recently been discovered and analyzed. ... The central surface brightness of this galaxy is 24.28 . Malin 2 This galaxy is another huge disk galaxy with a scale length of 15 kpc and a redshift of 15000 km/a. The high surface brightness knot in one of its spiral arms actually has the same color, luminosity and H-alpha equivalent width as the entire Large Magellanic Cloud . ... Truly it is a Low Surface Brightness Galaxy. ...

... For SIMS (Secondary Ion Mass Spectrometry) analysis, a solid surface is bombarded by primary ions of some keV energy. ... The subsequent mass analysis of the emitted ions provides detailed information on the elemental and molecular composition of the surface. ... Extremely short ion pulses with a duration below . ... By rastering a fine-focussed ion beam over the surface, like an electron beam in an electron microprobe, mass resolved secondary ion images (chemical maps) can be obtained...

Program: RADPROF Purpose: Solves the radial surface density distribution from a strip integral of the brightness distribution. ... Algorithm: 1. read in the observational data of observation 1 from the data file for both the east and west side 2. convert the positions on the resolution (= position ) axis to radial distances in the plane of the galaxy 3. make an inital guess of the radial distribution 4. start lucy iterative scheme to compute the true radial ...

Main planetology and astrophysics scientific tasks of gamma-spectrometry GRS and detector HEND . ... The origin of Mars . The ratio of natural radioactive isotopes 19 K/ 92 U will allow to estimate the temperature of proto-planetary cloud in the point of Mars creation . ... Abundance of main elements at valleys and at plateaus will allow to determine their ages . ... Water as a factor of Mars global evolution, the presence of water and water ice under the surface in the present time . ...

... spectrum . ffit . ... grids . ... These commands read in a grid of model spectra. ... Values for the parameters are taken from the input models themselves, to avoid mixups. The syntax of the command arguments is precise. model{ . ... If there is only one spectrum to fit, one should set default parameters for the secondary which lie within the model grid, with <L_2/L> being a very small value. ... The output is saved in a file <file.fit> , where <file> was the name of the spectrum being fitted. ...

... GSAOI Home . ... Science . ... It is widely accepted that the evolution of the large scale structure of the Universe is driven by dark matter. Understanding this dark matter continues to be one of Astronomy's great unsolved problems. Measuring the bulk motions of galaxies allows us to map the overall mass distribution of the Universe in a way that is independent of the luminous matter in galaxies. ...

... Keck: The Largest Optical Telescope . ... Here's what a spiral galaxy REALLY looks like. ... In the above picture, note how blue the spiral arms are - this indicates the presence of hot young stars and on-going star formation. M81: A Bulging Spiral Galaxy . ... Few stars are still forming in the old giant spiral galaxy M81. The blue regions in this picture - representing ultraviolet light - highlight regions of bright young stars and star formation and appear rare than in M74 and M33. ...

... Since planets are expected to form out of the material in disks around young stars, the formation of a planet will thoroughly alter the structure of the circumstellar disk of their host star, forming significant gaps in the radial distribution of matter around the star. Additionally, processing of solids (annealing/crystallization) and changes in the overall gas/dust ratio are thought to happen during the planet formation process and are believed to alter the observational signature of the disk. ...

Catalogue of Spatially Resolved Kinematics of galaxies . ... The goal of the present project is to built a catalogue gathering references to all spatially resolved studies, for galaxies of all types, whatever the gas or stellar content is concerned. The catalogue has been assembled from merging the lists of Corradi and Capaccioli (1990) and Prugniel and Simien (1996). ... In total, the published catalogue contains 4165 observations of 2070 galaxies referring to 743 published papers. ...

... In planets astronomy: . the relativist theory of the planets movement was found. ... the planets system of other stars were opened. ... In galaxy and out of galaxy astronomy: . It's found out the general constrution of the Galaxy and its main observed solids; . ... the methods of measuring the distances to the most remote objects in the Universe are found out; . ... it is found out that the galaxy accumulations are not haotic, but form the largescale celling structure of the Universe. ...

... Each day a different image or photograph of our fascinating universe is featured, along with a brief explanation written by a professional astronomer. August 13, 1997 . Resolving Mira . ... FOC , ESA , NASA . Explanation: Most stars appear only as points of light. Recently, Betelgeuse became the second star, after our Sun , to have it surface resolved. ... Possible explanations include gravitational perturbation and/or heating from Mira's white dwarf star companion . ... About APOD > . ...

... 3 ­ Sternberg State Astronomical Institute, Moscow, :jeanna@sai.msu.ru The graphic method of the analysis of an arrangement of linear structural elements on geographical and geological maps of continents (A.V.Dolitsky, [1]) has allowed to find out global stress fields of the past and among them one which directions (the main normal and maximal tangents) describe more than 80 % of all linear elements of a relief. ... The found poles share program way on density of an arrangement on 3-4 groups. ...

... Certain classical problems of one-dimensional dynamics, of dynamics on surfaces, of billiards in polygons, of surface foliations, can be solved using the recent knowledge about the moduli spaces. ... The conference is intended to put into contact experts in different aspects of the area (dynamics in moduli spaces, surface dynamics, surface foliations, horocyclic flow, symbolic dynamics, billiards in polygons), which, hopefully, would enrich everybody. ... Download conference poster (PDF, 549k) . ...

... C. Pinto, D. Galli, F. Bacciotti . 2008, A , in press . IR diagnostics of embedded jets: velocity resolved observations of the HH34 and HH1 jets . ... 2008, ApJ, in press . The low-mass YSO CB230-A: Investigating the protostar and its jet with NIR spectroscopy and Spitzer observations . F. Massi, C. Codella, J. Brand, L. di Fabrizio, J. Wouterloot . ... Click to examine publications from other years . ... Star Formation Group . Radioastronomy Group . ... Arcetri Home Page . ...

Star Formation in HI-Selected Galaxies Jessica Rosenber George Mason University AKARI Arecibo Today s Technology Spitzer The Next Generation SKA ALMA JWST Herschel Questions to address by studying SF in HIselected galaxies · What is the best way to measure SF in galaxies that, in some cases, may be metal poor · What is the SF rate density in the local universe? ... How does SF efficiency vary with galaxy mass? ... ADBS Not a star an ultra compact star forming dwarf galaxy! ...

... In spite of the good potential possibilities, some of the station "Dnepr" design characteristics did not allow us to apply the usual special IS radar measurement methods. ... Thus for IS signal measurements at the "Dnepr" station, we have developed special methods for recording and processing IS signals in order to determine plasma ionospheric parameters. ... Equations (4-5) from the basis for data post processing to obtain ionosphere parameters. ...

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... This paper describes our GAMMS (Gravitational Adaptive Mesh Multigrid Solver) code, which is a numerical gravitational solver, based upon a multigrid (MG) algorithm and a local refining mesh strategy (AMR, Adaptive Mesh Refinement). ... Multigrid solves differential equations using a set of multilevel grids, for an optimal O(N ) computational cost. ... GAMMS: AMR for gravity 671 Figure 1. ... The ensuing code, GAMMS (Gravitational Adaptive Mesh Multigrid Solver) is described in the sequel. ...