We present infrared observations of 66 starburst galaxies over the full range of oxygen abundances observed in local star-forming galaxies, from 12+log(O/H)=7.1 to 8.9. ... We confirm a strong correlation of aromatic emission with metallicity, with a threshold at 12+log(O/H)~8. We show that the far-infrared color temperature of the large dust grains increases toward lower metallicity, peaking at a metallicity of 8 before turning over. ... ADS Citation Query . citations = 169 . ...

... Science . ... Science Users Information > Science Activities > PhD Thesis Topics offered by ESO Faculty Members . ... Science Users Information . ... Data Handling and Products . ... Science Data Products Forum . ... ESO Data . ... ESO Data Access Policy . ... ESO Science Newsletter . ... ESO astronomers often are working on scientific programmes and data sets that are suited for PhD theses. This page gives an overview over what is currently offered by Faculty astronomers. ... Thesis topic . ...

The very metal-poor local dwarf galaxies - the analogs of primordial galaxies in young Universe . ... The goal of this project is the study of the properties of the local eXtremely Metal-Deficient (XMD) dwarf galaxies. ... S.A. Pustilnik, J.-M. Martin . ... Pustilnik S.A. "Dark galaxies" and local very metal-poor gas-rich galaxies: possible interrelations, in: Dark Galaxies and Lost Baryons, Edited by J.Davies and M.Disney, Proceedings of IAU Symposium No. 244, held 25-30 June, 2007 in Cardiff, UK. ...

Class 1 Introduction, Background History of Modern Astronomy The Night Sky, Eclipses and the Seasons Kepler's Laws Newtonian Gravity General Relativity Matter and Light Telescopes Class 2 Solar System Characteristics Formation Exosolar Planets Class 3 Stars The Sun Stellar Evolution of Low and High Mass Stars Deaths of Stars Exotic Stars Class 4 Galaxies Galaxy Classification Formation of Galaxies Galactic Evolution ... So far, one planet has been studied by this method. ...

... Our recent observations with the Hubble Space Telescope (August 29, 2014) led to revealing a highly isolated dwarf spheroidal galaxy KKs 3 situated at a distance of 2.12 0.07 Mpc from the Milky Way. The dSph galaxy locates on the southern sky (RA=02 h 24 m 44.4 s , Dec.= ... Over the last decade, about 30 dSph galaxies have been discovered inside the Local Group through systematic search in the vicinity of M31 and more that a dozen dSphs were discovered in the nearby group around M81. ...

... Proposal Type: General Category: Observation Category: Total Time Requested: Minimum Useful Time: Prop osal Title: ABSTRACT: Regular Astronomy Extragalactic 30 Hours 2 hours The HI Properties of Dwarf Galaxies Hosting Massive Black Holes While black hole (BHs) inhabit the centers of essentially all massive bulge-dominated galaxies, the prevalence of BHs in dwarf galaxies is still unknown. ... We propose to explore the role of AGN feedback on the HI content of low mass galaxies. ...

... By taking advantage of atomic hydrogen (HI) observations obtained as part of the GALEX Arecibo SDSS and ALFALFA surveys, I will demonstrate that the combination of deep, targeted observations and spectral stacking of blind, large-area shallow surveys is critical in order to characterize how the gas content of galaxies depends on their structure, star formation activity and environment. ...

... Galaxies, AGN, Cosmology . ... Ionized outflows in z~2.4 quasar host galaxies . ... The work analyses a sample of bright AGN at redshift 2.4, a cosmic epoch for massive galaxies and BH growth, when the most powerful, fast outflows are expected . ... These results, presented in the article " Ionized outflows in z~2.4 quasar host galaxies " to be published in Astronomy & Astrophysics, open the door to further analysis connecting molecular and ionized outflows to the AGN and host galaxy properties. ...

Astronotes Armagh Planetarium's Stellar Blog! ... Planets . ... Earth Satellites . ... A Scorched World: too distant to image, Kepler-10b is depicted here by a NASA artist (Image credit: NASA/Kepler Mission/Dana Berry) . The Kepler satellite looks for planets passing between their parent star and Earth. ... Placed beside our homeworld, Kepler-10b would be about 40% wider than Earth. ... Possibly only occasional jagged islands of metal and rock break the monotony of its glowing lava oceans. ...

... The Impact of HST on European Astronomy . ... These range from the study of nearby planets, the processes of star and planet formation, the stellar and interstellar components of galaxies, the discovery that most, if not all, galactic nuclei harbor a massive black hole that profoundly affects their evolution, to the realisation that the universe as a whole is undergoing acceleration as a result of a yet unknown form of dark energy . ... Formation, structure and evolution of galaxies . ...

Rampaging Supernova Remnant N63A . ... As little as 2,000 years ago, light from a massive stellar explosion in the Large Magellani