منابع مشابه
Fraction of Contact Binary Trojan Asteroids
We present the results of an optical lightcurve survey of 114 Jovian Trojan asteroids conducted to determine the fraction of contact binaries. Sparse-sampling was used to assess the photometric range of the asteroids and those showing the largest ranges were targeted for detailed follow-up observations. This survey led to the discovery of two Trojan asteroids, (17365) and (29314) displaying lar...
متن کاملSpectral Properties of Near-Earth Asteroids: Evidence for Sources of Ordinary Chondrite Meteorites
Although ordinary chondrite (OC) meteorites dominate observed falls, the identification of near-Earth and main-belt asteroid sources has remained elusive. Telescopic measurements of 35 near-Earth asteroids ( approximately3 kilometers in diameter) revealed six that have visible wavelength spectra similar to laboratory spectra of OC meteorites. Near-Earth asteroids were found to have spectral pro...
متن کاملThe Broad Band Spectral Properties of Binary X–ray Pulsars
The X–ray telescopes on board BeppoSAX are an optimal set of instruments to observe bright galactic binary pulsars. These sources emit very hard and quite complex X–ray spectra that can be accurately measured with BeppoSAX between 0.1 and 200 keV. A prototype of this complexity, the source Her X–1, shows at least seven different components in its spectrum. A broad band measure is therefore of p...
متن کاملBroad band Spectral Properties of Accreting X–ray Binary Pulsars
Broad-band spectra of accreting X–ray binary pulsars can be fit by a phenomenological model composed by a power law with a high energy rollover above 10 keV, plus a blackbody component with a temperature of few hundred eV. While, at least qualitatively, the hard tail can be explained in terms of (inverse) Compton scattering, the origin of the soft component cannot find a unique explanation. Rec...
متن کاملBinary Asteroids and the Formation of Doublet Craters
found we could duplicate the observed fraction of doublet craters found on Earth, Venus, and Mars. Our results suggest At least 10% (3 out of 28) of the largest known impact craters that any search for asteroid satellites should place emphasis on Earth and a similar fraction of all impact structures on on km-sized Earth-crossing asteroids with short-rotation Venus are doublets (i.e., have a com...
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ژورنال
عنوان ژورنال: Monthly Notices of the Royal Astronomical Society
سال: 2018
ISSN: 0035-8711,1365-2966
DOI: 10.1093/mnras/sty1013