... 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. ...

... She is working with Claus Leitherer on different properties of the star formation process in local irregular galaxies. ... Her main research interests involve: the role of evolution in galaxy properties; the environmental effects in galaxy evolution/formation; the properties of star-forming galaxies at low and high redshifts; the starburst/AGN connection. ... She is working with Daniela Calzetti, Claus Leitherer, and Tim Heckman on the structure and evolution of starburst galaxies. ...

... Poitiers, 23 January 2007 Science Vision for European Astronomy in the Next 20 Years 2 Is the initial mass function universal? ... High Poitiers, 23 January 2007 Science Vision for European Astronomy in the Next 20 Years 4 Do we understand stellar structure and evolution? ... Interferometry in near infrared and radio: measuring radii and resolving stellar surface Science Vision for European Astronomy in the Next 20 Years Poitiers, 23 January 2007 5 What is the life-cycle of the ISM and Stars? ...

Next: STELLAR PROPERTIES Up: EXTREME HELIUM STARS: PULSATION Previous: EXTREME HELIUM STARS: PULSATION . ... The latter are distributed over most of the Hertzsprung-Russell diagram; one of the most extreme examples is provided by the extreme helium stars (EHes) - early-type supergiants practically void of hydrogen in their atmospheres. ... Next: STELLAR PROPERTIES Up: EXTREME HELIUM STARS: PULSATION Previous: EXTREME HELIUM STARS: PULSATION Simon Jeffery . ...

... High-resolution Herschel spectroscopy reveals the proto-planetary disk around the young star T Tau N . ... A study led by Linda Podio ( AstroFIt fellow at the Arcetri Observatory) with Inga Kamp (Kapteyn Institute, the Netherlands), Claudio Codella (Observatory of Arcetri) and other collaborators from Grenoble, UK and USA, makes use of high-resolution spectroscopic observations with HIFI on board the Herschel space observatory to characterize the disk around the young star T Tau N . ...