... More recently, I have been concerned with observing masers located in the circumstellar shells generated by red giant stars in their mass-loss phase, and in what we can therefore learn about the late stages of stellar evolution. 100 mJy are now undetectable after ~12 years, aka the DEATH of an OH/IR star or its cyclical evolution back to a Mira variable. ... I find that this momentum flux is sufficient to support the largest observed rates of AGB mass-loss. last updated: 14 January 2015 . ...

... 1997 . ... Recent star formation in the dwarf galaxy NGC 5253 . Calzetti, D., Meurer, G. R., Bohlin, R. C., Garnett, D. R., Kinney, A. L., Leitherer, C., Storchi-Bergmann, T. AJ, 114, 1834 (1997) . OVI+Lbeta+CII from starburst and post-starburst galaxies. ... Gonzalez Delgado, R. M., Leitherer, C., and Heckman, T. M. ApJ, 489, 601 (1997) . ... Heckman, T. M., Gonzalez-Delgado, R. M., Leitherer, C., Meurer, G. R., Krolik, J., Wilson, A. S., Koratkar, A., Kinney, A. L. ApJ, 482, 114 (1997) . ...

... This recently reintroduced area of research at the Observatory continues a tradition established at the Observatory by E.J. Opik , focusing on problems involving the origin and evolution of comets , their dynamical transfer from the Oort cloud and other reservoirs into short-period orbits , the interrelationship between comets and asteroids (particularly objects in Earth-crossing ... The first concerns the origin and evolution of the Oort cloud in the Galaxy. ...

... S. K., Ballero, F. Matteucci, L. Ciotti, F. Calura, P. Padovani, 2008, "Evolution of chemical abundances in Seyfert galaxies", A , 478, 335 . ... P. Padovani, F. Matteucci, 1993, "Stellar Mass Loss in Ellipticals and the Fueling of Active Galactic Nuclei", ApJ, 416, 26 . F. Matteucci, P. Padovani, 1993, "Chemical Evolution of Galaxies and Quasar Metallicities", ApJ, 419, 485 Back to Paolo Padovani's Home Page ...

... The NSFnet backbone supports Internet connectivity to this site and hopefully the delivery of real data in quasi-real time demonstrates the power of the Internet today. ... Last Images of Comet prior to first Impact . ... Fragment A . KPNO Image taken near Fragment B Impact time . ... Well besides weighing a lot and being cold all the time, here is some animation to show you what the impact events might look like if you were riding one of the fragments . ...

... Galaxy Evolution home . Cavendish Astrophysics . Cavendish Laboratory . People and Facilities . ... Cosmological evolution of star-forming galaxies . The origin and evolution of radio sources . Radio sources and their environments . ... Paul Alexander . P.Alexander@mrao.cam.ac.uk . ... Helen Buttery . Helen Thomas . ... Astrophysics group members (full list) . ...

... Tonight's Sky . ... The Magazine . News . Observing . ... Community . ... Magazine . ... Gravitational wave search provides insights into galaxy evolution and mergers . ... The double star 54 Leonis, spiral galaxy NGC 3198, and emission nebula NGC 3199 . ... Open cluster NGC 2818, spiral galaxy NGC 2964, and spiral galaxy NGC 2976 . ... Astronomy for Kids . ... galaxy evolution . ... Receive news, sky-event information, observing tips, and more from Astronomy's weekly email newsletter. ...

... Australia Telescope Steering Committee . ... Parkes radio telescope . ... Late Stages of Stellar Evolution . Welcome to the home page of the Late Stages of Stellar Evolution" We are a research group which operates within the Astrophysics Group of the Australia Telescope National Facility. ... To investigate the late stages of stellar evolution and in particular the role of stellar mass-loss in the evolution of asymptotic giant branch stars, proto-planetary nebulae and extremely massive stars. ...

... My main area of research is the study of the formation and evolution of galaxies, e.g. through detailed observations of the scaling relations of early-type galaxies, in particular the Fundamental Plane, at the highest possible redshifts (recent papers on my web site "http://www.arcetri.astro.it/~sperello" ). ... The UV polarization of distant radio galaxies provides one of the most stringent tests of CB (recent papers on my web site "http://www.arcetri.astro.it/~sperello" ). ...

Next: Initial binary parameters Up: Population synthesis of Previous: Introduction . Monte-Carlo method for statistical simulation of binary evolution was originally proposed by Kornilov & Lipunov (1983a,b) for massive binaries and developed later by Lipunov & Postnov (1987) for low-massive binaries. ... Recently Leitherer & Heckman (1995) have modelled star formation for elliptical and spiral galaxies, taking into consideration only the single stars. ... Initial binary parameters . ...

Supernova 2002fk in NGC 1309 . This page is devoted to information on Supernova 2002fk in NGC 1309 Basic information on this SN, including the last reported brightness, on this Supernova can be found on the main page . Information on the original web pages for many of these images can be found on the updates and links web pages. ... 2002/09/19.848 . ... JM Llapasset image . ... 13.0 . ... Josep M. Bosch . ... Josep M. Bosch image . ... vsnet-campaign-sn 476 ] SN 2002fk in NGC 1309 . ...

. My astronomical research interests center on galaxy structure and evolution. Current topics include: . Polar-ring and interacting galaxies (see also new catalogue ) . Galaxy warps: statistics, properties and origin . Spiral galaxies at z~1: radial and vertical structure of stellar disks, statistics of interactions . Surface photometry and kinematics, dynamical modeling . Observational cosmology . Joomla Counter since Sep 1997

Astronotes Armagh Planetarium's Stellar Blog! ... Universe . ... About four centuries ago, a tiny white dwarf star about the same diameter as Earth, but with a mass equivalent to the Sun, swung in a tight orbit about some larger star. The white dwarfтАЩs intense gravity tore material from its more massive companion. ... The quantity of mass in the universe is constant since the universe started its last self-replication, since its last singularity, its last pre-big bang re-birth conception. ...

... arXiv.org . astro-ph . ... We fit the near-infrared to radio spectral energy distributions of 30 luminous and ultra-luminous infrared galaxies with pure starburst models or models that include both starburst and AGN components to determine important physical parameters for this population of objects. In particular we constrain the optical depth towards the luminosity source, the star formation rate, the star formation efficiency and the AGN fraction. ...

Next: Observations and data reduction Up: HS 0822+3542 - a Previous: HS 0822+3542 - a . ... I Zw 18, a BCG with the lowest known oxygen abundance among the galaxies (O/H 1/50 (O/H) , Searle & Sargent [ 1972 ]; Izotov & Thuan [ 1999 ]), has been suggested as a candidate to be a truly-local young galaxy, experiencing its first short SF episode. ... 1998 ]). ... In this paper we describe the data obtained for the third most metal-deficient galaxy, HS 0822+3542 with O/H = 1/36 (O/H) . ... 0822+3542 1 . ...

... Posts tagged ?delta method? ... Tags: application , Bayesian , book , books , box plot , cartoon , chi-square , CLT , correlation , delta method , EDA , error bars , Frequentist , gaussian , references , scatter plot . ... Algorithms arXiv Astro Bad AstroStat Bayesian CHASC Cross-Cultural Data Processing Fitting Frequentist Galaxies gamma-ray High-Energy Imaging Jargon Job Languages MC MCMC Meta Methods Misc News Nuggets Objects Optical Physics Quotes Spectral Stars Stat Timing Uncertainty X-ray . ...

In accreting binary neutron star systems matter is channelled by the strong magnetic field to the poles of the neutron star. The accreted matter accumulates at the poles to form accretion mounds. Pressure from the confined matter can significantly distort the local magnetic field structure, affecting the X-ray observations and long term evolution of the magnetic field. ...

... Millions of Stars in Omega Centauri . ... In an unexpected twist, recent observations have shown that the gas in the outer regions of this photogenic spiral is rotating in the opposite direction from all of the stars! ... Space Shuttle and Space Station Photographed Together . ... Usually, pictures of the shuttle, taken from space, are snapped from the space station. Commonly, pictures of the space station are snapped from the shuttle. ... A Last Landing for Space Shuttle Endeavour . ...

Getting Rid of The Theory of Evolution . ... Two months earlier, the Kansas School Board of Education voted to remove all references to evolution from its new science curriculum. ... In astronomy we cannot talk about evolution in general without being more specific?stellar evolution, galaxy evolution, planetary evolution. ... The National Academy of Sciences published a document for teaching evolution in science classes. ... High School Students Take a Shower . ... Education . ...

2009 - 2008 - 2007 - 2006 L. V. Abdurakhimov, M. Yu. Brazhnikov and A. A. Levchenko, "Evolution of a turbulent cascade on the surface of liquid hydrogen under a change in the spectral characteristic of an exciting force", JETP Letters, Vol. ... Brazhnikov, L.V. Abdurakhimov, P.V.E. McClintock, and L.P. Mezhov-Deglin, "Capillary turbulence on the surface of quantum fluids", Progress in Low Temperature Physics, Vol. 163 on Quantum Turbulence, edited by Halperin Tsubota, ISBN 978-0-08-054810-4 . ...