... A non-linear relationship is observed between the sky brightness on clear and overcast nights, with a change in behavior near the rural to urban landuse transition. ... The great variation in skyglow radiance observed from site-to-site and with changing meteorological conditions underlines the need for a long-term international monitoring program. he introduction of artificial light has caused an unprecedented disruption to the nighttime environment over large areas of the Earth. ... Data processing...
... gal(a) ? ... J2000) 227 227 227 227 227 227 227 227 227 227 227 227 227 227 227 227 227 227 227 227 227 227 227 227 227 227 227 227 227 227 227 227 227 227 227 227 227 227 227 227 ... This could be considered an underestimate, because QSOs are easier to identify than early-type galaxies which appear to dominate the red sample so the 14 objects with unidentified spectra are most likely to be galaxies.) ...
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Ссылки http://www.stecf.org/goods/spectroscopy/CDFS_Mastercat/croom01.pdf -- 588.2 Кб -- 16.09.2004 Похожие документы
John Kielkopf entered the University of Louisville as an early-admissions student in 1963 before finishing high school. ... Currently also an Adjunct Professor at the University of Southern Queensland, Australia, he has been an Associate Research Scientist at Hopkins, a Visiting Scientist at Argonne National Laboratory, and an Adjunct Astronomer at the Observatory of Paris - Meudon. ... Bradley Carter and Rhodes Hart of the University of Southern Queensland, Australia. ...
... Phase Diversity Imaging: Real Time Correction of the Atmosphere and Telescope . Dr. Robert A. Gonsalves . ... Join us this month for what promises to be an engaging talk by Dr. Robert A. Gonsalves, “Phase Diversity Imaging: Real Time Correction of the Atmosphere and Telescope.” Phase diversity imaging uses multiple images of an object to combat the deleterious effect of the changes in the atmosphere and telescope. ... Copyright (c) Amateur Telescope Makers of Boston, Inc. ...
... Fan, X., Strauss, M. A., Annis, J., Gunn, J. E., Hennessy, G. S., Ivezic, Z., Knapp, G. R., Lupton, R. H., Munn, J. A., Newberg, H. J., Schneider, D. P., and Yanny, B., for the SDSS Collaboration, "Spectroscopy of Quasar Candidates from Sloan Digital Sky Survey Commissioning Data", 1998, After the Dark Ages: When Galaxies Were Young (the Universe at 2 < z < 5), Eds S. Holt and E. Smith, 282. ... The Discovery of a Field Methane Dwarf from Sloan Digital Sky Survey Commissioning Data", 1999, Ap. ...
... 337, 275292 (2002) The correlation of line strength with luminosity and redshift from composite quasi-stellar object spectra S. M. Croom,1 K. Rhook,1 E. A. Corbett,1 B. J. Boyle,1 H. Netzer,2 N. S. Loaring,3 L ... We measure highly significant Baldwin effects for most broad emission lines (C IV 1549, C III] 1909, Mg II 2798, H ,H ) and show that they are predominantly caused by correlations with luminosity, not redshift. ... The correlations of log W with log(1 + z ) for each line. ...