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6 papers · 2 filters
Similarities Between the Inner Solar System and the Planetary System of PSR B1257+12
Tsevi Mazeh, Itzhak Goldman
We call attention to the surprising similarity between the newly discovered planetary system around PSR B1257+12 and the inner solar system. The similarity is in the ratios of the…
Gamma Ray Lines from the Orion Complex
Reuven Ramaty, Benzion Kozlovsky, Richard E. Lingenfelter
We show that the 4.44 and 6.13 MeV line emission observed with COMPTEL from Orion is consistent with gamma ray spectra consisting of a mixture of narrow and broad lines or spectra…
Detection of Compact Ultraviolet Nuclear Emission in LINER Galaxies
Dan Maoz, Alexei V. Filippenko, Luis C. Ho +4
Low-ionization nuclear emission-line regions (LINERs), which exist in a large fraction of galaxies, may be the least luminous manifestation of quasar activity. The nature of LINERs…
Echo Mappping of the Broad Line Region of AGNs -- A Critical Appraisal
Dan Maoz
The results of recent AGN monitoring campaigns confirm the ``big picture'' of the echo paradigm, but the details of the emission-line light curves cannot be accurately reproduced w…
Bloated Stars as AGN Broad Line Clouds: The Emission Line Spectrum
Tal Alexander, Hagai Netzer
The Bloated Stars Scenario proposes that AGN broad line emission originates in the winds or envelopes of bloated stars (BS). Its main advantage over BLR cloud models is the gravita…
Gamma Ray Bursts from Interaction of Relativistic Flows with Radiation Fields
Amotz Shemi
Relativistic flows resulting from sudden explosive events upscatter ambient interstellar photons of local radiation fields. For Lorentz factor and dense optical - UV radia…