... Stellar Evolution is driven entirely by the never ending battle between Pressure and Gravity . As imbalances are reached, the star is driven to find a new Energy source. ... Pressure and gravitational forces are equal, the star is stable and its core is sufficiently hot to fuse Hydrogen into Helium More about main sequence stars . ... The luminosity generated by the core fusion of Helium into Carbon is far greater than the shell luminosity associated with the fusion of Hydrogen into Helium. ...

Welcome to the Starburst and Galaxy Evolution website.

The project of the informational system creation on the problem of evolution of radio galaxies, as a part of the "Big Trio" project aimed on studing of distant radio galaxies, is designed. This system allows a user to operate with simulated curves of spectral energy distributions (SED) to estimate ages and redshifts by photometry data. Authors use SEDs of several models for different types of galaxies. ... The HTTP and e-mail access is organized to this system. ...

Observed maximum rotation velocity uncorrected for inclination effect. This quantity is calculated from 21-cm line widths at different levels and/or rotation curves (generally in H_alpha). ... These data are characterized by some secondary parameters: telescope, velocity resolution, level of the 21-cm line width and bibliographic reference. ... we start from a standard sample (a set of measurements giving a large and homogeneous sample). ... HyperLeda . ...

The spectra of AGN host galaxies contain emission lines excited by radiation from both massive stars and the AGN accretion disk. ... I will present the first 2D maps of the star formation rates across AGN host galaxies without contamination from the AGN, and the first maps of the narrow line region emission without contamination from star formation. ...

... VLA observations and Tully-Fisher distances of gas-poor spiral galaxies in the Virgo Cluster Region . ... The HI-H2 Pressure Relation In Early-Type Galaxies . ... Tracing evolution of early-type spirals through the neutral hydrogen window . ... An Arecibo HI 21-cm Absorption Survey of Rich Abell Clusters . ... The Arecibo Ultra-Deep Survey . ... Absorption in varying galactic environments seen in HI surveys . ... Early-type galaxies with neutral hydrogen in the Virgo cluster from the ALFALFA survey ...

Conference: The many faces of Centaurus A Is Centaurus A a typical Radio Galaxy? ... It is the closest of its kind Questions of interest Formation and evolution of RGs: Which mechanisms trigger radio activity? - mergers/collisions/interactions/cold accretion What is feeding the black hole? - circumnuclear regions: accretion disks/tori/infall/outflow Why are some galaxies active while others are not? ... Morganti et al. ... 2007) Radio Galaxy sample Radio source size: Cen A FR-I vs. ...

... CONCEPTESTS Creating ConcepTests The Night Sky, and the Celestial Sphere Time and Seasons Magnitudes Distances Telescopes History Motion and Force The Elements Radiation, The Electromagnetic Spectrum The Earth Moon Planets, Asteroids, and Comets The Sun Stellar Properties Star Formation Energy Generation in Stars Stellar Evolution Binary Star Systems Stellar Motions and Kinematics Our Galaxy: Structure, ...

... 05/09/2013 Galaxy Evolution over Five Decades - Cambridge 2013 Nuclear activity and environment Effect of environment on AGN is not completely clear yet. ... 05/09/2013 Galaxy Evolution over Five Decades - Cambridge 2013 Effect of the mass Mass slices ­ optical and radio AGN overall interaction one-on-one interaction relative location 05/09/2013 Galaxy Evolution over Five Decades - Cambridge 2013 Stratified study Stratifed study that considers several strata of mass. ...

... 172 ] Briefly, the count rate at the detector from a source at a redshift z is . ... Figure 55 shows the ``Green functions'' for the double compact binary merging rate   evolution assuming no collapse anisotropy. ... Another way that diverse peculiarities in the - distribution induced by the sources evolution could arise is connected with a possible non-monotonic character of the star formation rate in galaxies. ... 22 ] Figure  56 shows two-dimensional cuts through the parameter space. ...