Results 11 to 20 of about 53,761 (176)

Extragalactic Astronomy and IUE [PDF]

open access: bronzeHighlights of Astronomy, 1980
The first thing to say is that IUE has been a great success and we should all congratulate the agencies in the U.S.A., Europe and the U.K. and the many scientists and engineers involved in the project on making it possible. In surveying what has been achieved so far, it is important to remember that we may well have IUE with us for a further 3 or even ...
M. S. Longair
openaire   +2 more sources

Extragalactic stellar astronomy with the brightest stars in the universe [PDF]

open access: bronzePhysica Scripta, 2007
AbstractA supergiants are objects in transition from the blue to the red (and vice versa) in the uppermost HRD. They are the intrinsically brightest “normal” stars at visual light with absolute visual magnitudes up to −9. They are ideal to study young stellar populations in galaxies beyond the Local Group to determine chemical composition and evolution,
Kudritzki, Rolf   +3 more
  +8 more sources

Proton and neutrino extragalactic astronomy [PDF]

open access: greenPhysical Review D, 2008
The study of extragalactic sources of high energy radiation via the direct measurement of the proton and neutrino fluxes that they are likely to emit is one of the main goals for the future observations of the recently developed air showers detectors and neutrino telescopes. In this work we discuss the relation between the inclusive proton and neutrino
P. Lipari
openaire   +4 more sources

Extragalactic Stellar Astronomy with Blue Supergiants [PDF]

open access: green, 2007
2 pages. To appear in the proceedings of the workshop "Massive Stars: Fundamental Parameters and Circumstellar Interactions", Rev. Mex. Astron. Astrofis.
Przybilla, N.   +5 more
  +6 more sources

Observational Problems in Extragalactic Astronomy [PDF]

open access: bronzeHighlights of Astronomy, 1992
AbstractA large number of observations have accumulated which represent baffling mysteries from the standpoint of current astronomy. A sample of the most crucial of these cases is reviewed and updated. Evidence has slowly built up to the point where often each individual object is a formidable challenge to conventional theory. But, most importantly, it
Halton Arp
openaire   +2 more sources

An Outsider’s View of Extragalactic Infrared Astronomy [PDF]

open access: bronzeSymposium - International Astronomical Union, 1981
No one could be more of an outsider to infrared astronomy than myself. Like all outsiders, one forms preconceived notions about disciplines outside one's own speciality. In my own case, I can summarise these under three headings.
M. S. Longair
openaire   +2 more sources

Hypercat : A Database for extragalactic astronomy [PDF]

open access: green, 1999
The Hypercat Database is developed at Observatoire de Lyon and is distributed on the WEB through different mirrors in Europe. The goal of Hypercat is to gather data necessary for studying the evolution of galaxies (dynamics and stellar contains) and particularly for providing a z=0 reference for these studies.
Prugniel, Ph., Maubon, G.
openaire   +3 more sources

Multi-wavelength extragalactic astronomy at Ghent University

open access: bronzeBulletin de la Société Royale des Sciences de Liège, 2019
Galaxies are generally considered as the basic building blocks of the Universe. Besides stars, galaxies also contain a supermassive black hole, a dark matter halo, and a multi-phase interstellar medium that consists of molecules, atoms, ions, and dust grains.
Baes, Maarten   +3 more
openaire   +3 more sources

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