Stellar Clusters are very useful laboratories for empirically studying stellar evolution. ... All cluster stars are at the same distance . All cluster stars have the same physical age . ... CM diagram Young Cluster In this case we see the Main Sequence fully represented. The blue dots represent massive stars with short main sequence lifetimes. ... Thus, identifying the most massive star which is still on the main sequence is an effective means of determining the age of a stellar cluster. ...

... Science . ... Science Users Information > Science Activities > PhD Thesis Topics offered by ESO Faculty Members > Studying the Cosmological Evolution of Galaxy Clusters with (Sub-)mm Observations . ... Data Handling and Products . ... ESO Data . ... Studies of the Planck data set with optical and sub-mm follow-up observations give new insights about the early assembly of the first clusters, and the later evolution of their gas content as well as of their population of star-forming galaxies. ...

... LMC Project Outline . NGC 1818 Initial Results . ... The Large Magellanic Cloud (LMC) is uniquely suitable for the study of massive star clusters at all stages of evolution. By combining HST observations of these clusters with N-body models we hope to understand the origin and evolution of rich star clusters in our own Galaxy, in the LMC, and beyond. ... We aim to combine our HST observations with N-body models to understand the formation and evolution of globular clusters. ...

... Johnson, K. E., Leitherer, C., Vacca, W. D., Conti, P. S. AJ, 120, 1273 (2000) . ... Sirianni, M., Nota, A., Leitherer, C., De Marchi, G., Clampin, M. ApJ, 533, 203 (2000) . B stars as a diagnostic of star formation at low and high redshift . ... Photon and metal production in starburst galaxies . ... Star formation in starburst galaxies . Leitherer, C. in Star Formation From the Small From the Small to the Large Scale, ed. F. Favata, A. A. Kaas, A. Wilson (Noordwijk: ESA), 37 (2000) . ...

... Contacts . 2012: . ... We refined the fundamental parameters of the components, the orbital periods, and the conditions of photospheric heating of the secondary component by the ultraviolet radiation of the hot component. ... The observations of the star clusters associated with ultra-luminous x-ray sources (ULXs) in four galaxies on the 6-meter and VLT telescopes have shown that all the ULXs are located within 200pc of very young star clusters (younger than 5 million years). ... Archive . ...

... BLUE STRAGGLER STARS are unusually hot and bright stars found in the cores of ancient star clusters known as globulars. ... BACKGROUND (from wikipedia): Blue straggler stars are stars in open or globular clusters that are hotter and bluer than other cluster stars having the same luminosity. ... There is evidence in favor of this view, notably that blue straggler stars appear to be much more common in dense regions of clusters, especially in the cores of globular clusters. ...

... Galaxy Evolution Explorer (GALEX) . ... Searching for SZ clusters . ... Baryon content of galaxy clusters and cosmology . ... 3 sigma peaks: Observational Signatures of High Redshift Galaxies and Low Redshift Clusters . CLUSTERS OF GALAXIES . ... Clusters of galaxies seen in X-rays: war and peace . ... Chandra X-ray Observations of Clusters/Groups/Galaxies . ... Common timing features in neutron stars and black holes . ... X-ray luminosity function of low-mass X-ray binaries in galaxies . ...

Find Similar Abstracts . ... Authors: . ... Astrophysics and Space Science, vol. 35, June 1975, p. 55-65. ... 06/1975 . ... Astrophysics . ... ASTRONOMICAL MODELS, BIG BANG COSMOLOGY, GALACTIC CLUSTERS, GALACTIC EVOLUTION, ASTROPHYSICS, INTEGRAL EQUATIONS, PARTIAL DIFFERENTIAL EQUATIONS, PERTURBATION THEORY . ... Use: Authors Title Abstract Text Text Query with Keywords Return: Query Results Query Form Database: Astronomy Instrumentation Physics and Geophysics ABSTRACT QUERY USER FEEDBACK HELP ...

... Abell 2142: Clash of the Galaxy Clusters . ... Credit: Maxim Markevitch ( CfA ), ACIS , SAO , CXC , Chandra , NASA Explanation: Over the course of billions of years, whole clusters of galaxies merge. Above is an X-ray image of Abell 2142 , the result of the collision of two huge clusters of galaxies, and one of the most massive objects known in the universe. ... Publications with keywords: cluster of galaxies - X-ray . Publications with words: cluster of galaxies - X-ray . ...

... Chandra Observation of DEEP2 Galaxy Groups and Clusters . ... Monday: 'Normal' Galaxies, Tuesday: Cluster Formation and Evolution . ... Statistics of galaxy groups in ultradeep XMM surveys. ... What can multiwavelength observations tell about cluster/group formation as well as galaxy evolution? ... I will present results from a Chandra study of eight low-redshift clusters that has systematically measured the AGN fraction in clusters and describe their spatial, kinematic, and host galaxy...

TALKS ST EL L E Raffaele Gratton INAF - Osservatorio Astronomico di Padova Stellar abundances and the chemical evolution of stellar systems: the Italian contribution The chemical composition of stellar syst the last few years, exciting results have and efficient spectrographs. ... Once the observations of all clusters will be completed for at least one season, we plan to better describe and model the evolution of the stellar angular momentum from the PMS to the TAMS. ...

... Galaxy Evolution home . Cavendish Astrophysics . ... Cosmological evolution of star-forming galaxies . ... Computing . ... The group makes extensive use of UK and international telescope facilities. The Galaxy Evolution group has full access to the computing facilties of the astrophysics group, namely the starlink cluster based on Sun and Linux workstations. Additionally we make heavy use of the group's 16-node Beowulf cluster which is soon to be upgraded to a 32-node cluster. ...

Detailed identifications of the FIRST (and NVSS) radio sources are carried out for 26 rich Abell clusters of galaxies in the framework of the announced project (A.G.Gubanov et al. 1997, in ``Problems of modern Radio Astronomy'', XXVII Radio Astronomy conference, St.Petersburg, V.1, P.168). ... Identification of radio sources in clusters of galaxies"). Identifications are performed for all radio sources within Abell radius of cluster of galaxies (3 Mpc for the Hubble constant of 50 km/s/Mpc). ...

... ATNF Colloquium: The role of environment in galaxy evolution . ... Our speaker will review the most recent results on the study of the role of the environment in galaxy evolution based on the analysis of multifrequency data of nearby clusters, and in particular of Virgo. The multifrequency data covering the whole range from UV to radio centimetres are compared to the predictions of tuned models of galaxy evolution in dense environments. ... today * ATNF | ...

... The obtained results lead to the following conclusions: a) the heavy element enrichment had taken place in the Galaxy in a few bursts of its activity rether than in a continuons manner; b) these bursts occured during the callapse of the early Galaxy; c) the star formation had been inhibited in the time of the bursts; d) the metal enrichment did not proceed in the periods of star formation, between these bursts of activity. ...

... The evolution of magnetic fields in OB-type stars from the study of open clusters of different ages . ... Wade G. A. The MiMeS Project: Magnetism in Massive Stars . ... Polosukhina N., Shavrina T., Drake N., Kudryavtsev D. Smirnova M. New results of the spectral observations of CPstars in the Li I 6708? spectral region with BTA telescope of SAO RAS . ... Magnetic Stars-2010 . ... List of participants . List of reports . ... Laboratory for the Stellar Magnetism Study of SAO of the RAS . ...

... 2000 March 6 . Abell 2142: Clash of the Galaxy Clusters . ... Explanation: Over the course of billions of years, whole clusters of galaxies merge. Above is an X-ray image of Abell 2142 , the result of the collision of two huge clusters of galaxies , and one of the most massive objects known in the universe. This false-color image shows a concentration of gas 50 million degrees hot near the center of the resulting cluster. ... About APOD | ...

... Stellar cinders . Born-again stars . ... Heavyweight Stars . ... What will happen inside the Sun and why? ... These are questions about "stellar evolution", the history of stars as they are transformed by nuclear processes deep inside. ... Most of what we know about stellar evolution comes from computer models of stars. ... We learn about the evolution of high-mass stars from HR diagrams of young galactic open clusters, and the evolution of low-mass metal-poor stars from old globular clusters. ...

... Confirm Dark Galaxy Existence . ... New evidence from NASA's Hubble Space Telescope and the Westerbork Synthesis Radio Telescope in the Netherlands has been used to rule out all but one of the ideas put forward to explain the existence of VIRGOHI 21, an intergalactic gas cloud 50 million light-years from the Earth. ... Are there more such dark galaxies out there? ... Credit: R. Minchin / Arecibo Observatory / Cardiff University / Isaac Newton Telescope / Westerbork Synthesis Radio Telescope . ...

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