منابع مشابه
Analyzing Spectral Lines of Nearby Extreme Galaxies
Chemical Abundances and Electron densities were calculated for two galaxies IC 1809 and UGC 02172 categorized as extreme star-forming systems from high H-alpha equivalent of -82 and -125, respectively. Line ratios [NII] λ6583/[OII] λ3727 were used to determine the metallicity for IC 1809 yielding a measurement of Z = 1.3 ± 0.1υ , where ionization did not display a significant effect. However, f...
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In its final year of inspiral, a stellar mass (1− 10M⊙) body orbits a massive (10 − 10M⊙) compact object about 10 times, spiralling from several Schwarzschild radii to the last stable orbit. These orbits are deep in the massive object’s strong field, so the gravitational waves that they produce probe the strong field nature of the object’s spacetime. Measuring these waves can, in principle, be ...
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We examine the reprocessing of X-ray radiation from compact objects by accretion disks when the X-ray emission from the star is highly beamed. The reprocessed flux for various degrees of beaming and inclinations of the beam axis with respect to the disk is determined. We find that, in the case where the beam is produced by a non-relativistic object, the intensity of the emitted spectrum is high...
متن کاملMasses of Compact Galactic Objects
Andrew Gould (Ohio state University) and B. Scott Gaudi (Ohio state University) 5 Using the technique of gravitational microlensing, SIM Lite will conduct a representative census of all compact Galactic objects from brown dwarfs to black holes, including white dwarfs, neutron stars, and main sequence stars. The masses of these objects will be derived from a combination of precise measurement of...
متن کاملFormation of Double Compact Objects
Current observations of double neutron stars provide us with a wealth of information that we can use to investigate their evolutionary history and the physical conditions of neutron star formation. Understanding this history and formation conditions further allow us to make theoretical predictions for the formation of other double compact objects with one or two black hole components and assess...
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ژورنال
عنوان ژورنال: Physical Review D
سال: 2018
ISSN: 2470-0010,2470-0029
DOI: 10.1103/physrevd.98.104034