Ultraviolet Astronomy Beyond 2020 Marc Postman and Matt Mountain
نویسنده
چکیده
UV astronomy has a promising long-term future if astronomers think boldly about where the next frontiers lie in this rich field. The most exciting of these frontiers involve resolving structures near or below angular scales of 20 mas and/or obtaining modest resolution spectroscopy of nanoJansky sources across the 0.11− 2.5 μm wavelength range (the optical and NIR bands provide rest-UV coverage at high redshift). These challenging requirements demand large apertures in space apertures of at least 8 meters in diameter and, by the end of 2020 decade, up to 20 meters. Incremental advances in telescope aperture are not compelling, so radical advance is needed. Fortunately, the technology needs of several communities are aligning to make large space-based optical systems affordable.
منابع مشابه
Response of conifers to UV-B and climate in mountain areas
The present study was focused to examine the combined effects of climate and ultraviolet-B radiation on conifer tree-ring density. Statistical methods were employed to extract tree responses in annual ring density and to identify functional relationship in trees when the level of ultraviolet-B radiation changes regardless of climate variations. In this study, the consideration was given to the ...
متن کاملThe Environmental Dependence of Brightest Cluster Galaxies: Implications for Large-Scale Flows
In a much-noticed recent study Lauer and Postman (1994) found that the inertial frame defined by a sample of 119 nearby Abell clusters with cz⊙ < 15000 km s −1 showed a highly significant motion with respect to the cosmic microwave background (CMB) frame. We construct a subsample of their sample which comprises 64 Abell/ACO clusters with X-ray luminosities from ROSAT and brightest cluster galax...
متن کاملar X iv : a st ro - p h / 04 12 57 0 v 1 2 1 D ec 2 00 4 The Fundamental Plane of Cluster
Based on observations with the NASA/ESA Hubble Space Telescope, obtained at the Space Telescope Science Institute, which is operated by the Association of Universities for Research in Astronomy, Inc. under NASA contract No. NAS5-26555. Based on observations obtained at the European Southern Observatory using the ESO Very Large Telescope on Cerro Paranal (ESO Programme 169.A-0458). UCO/Lick Obse...
متن کاملQuantifying energy condition violations in traversable wormholes
SAYAN KAR, NARESH DADHICH and MATT VISSER Department of Physics and Centre for Theoretical Studies, Indian Institute of Technology, Kharagpur 721 302, India Inter-University Centre for Astronomy and Astrophysics, Post Bag 4, Ganeshkhind, Pune 411 007, India School of Mathematical and Computing Sciences, Victoria University of Wellington, New Zealand E-mail: [email protected]; nkd@iucaa....
متن کامل