منابع مشابه
Uv Excess Galaxies: Wolf-rayet Galaxies
We discuss V and R band photometry for 67% of the Sullivan et al. (2000) SA57 ultraviolet-selected galaxy sample. In a sample of 176 UV-selected galaxies, Sullivan et al. (2000) find that 24% have (UV-B) colors too blue for consistency with starburst spectral synthesis models. We propose that these extreme blue, UV excess galaxies are Wolf-Rayet (WR) galaxies, starburst galaxies with strong UV ...
متن کاملUV Properties of Primeval Galaxies
The problem of UV properties of primeval galaxies is briefly assessed from the theoretical point of view discussing its impact on the definition of the cosmological model.
متن کاملIR colors and sizes of faint galaxies
We present J and Ks band galaxy counts down to J=24 and Ks=22.5 obtained with the new infrared imager/spectrometer, SOFI, at the ESO New Technology Telescope. The co-addition of short, dithered, images led to a total exposure time of 256 and 624 minutes respectively, over an area of ∼ 20 arcmin centered on the NTT Deep Field. The total number of sources with S/N> 5 is 1569 in the J sample and 1...
متن کاملThe Uv Emission of Elliptical Galaxies
Observational as well as theoretical developments subsequent to 1990 concerning the origin of the ultraviolet emission of elliptical galaxies are reviewed and discussed. In particular, successes and failures of an extensive set of predictions contained in Greggio & Renzini (1990) are discussed in the light of these development. Strong support to the preferred hot horizontal branch and AGB–manqu...
متن کاملUv Hst Spectroscopy of Star-forming Galaxies
to be published in the " Starburst Activity in Galaxies " proceedings by the RevMexAstronAstrofis. ABSTRACT HST spectroscopical observations of 8 HII galaxies are reported. Lyα emission was detected in 4 of them. We find that it is the velocity structure of the gas which is the main determining factor for the escape of the Lyα photons, and not the abundance of dust. The rest of the sample shows...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: The Astrophysical Journal
سال: 2017
ISSN: 1538-4357
DOI: 10.3847/1538-4357/aa6337