Abstract We report on the discovery by Zwicky Transient Facility of an asteroid orbiting entirely within orbit Venus, first known example this orbital class. The asteroid's perihelion is closer to Sun than aphelion Mercury, and its diameter estimated at about 1.8 km assuming albedo 0.2. object was observed 2020 January 4 in four exposures obtained 7 minutes apart during evening twilight survey....

I describe a model of energetic gamma ray and neutrino emission in blazars which is consistent with most of the gamma-ray observations, and use this model to estimate the diffuse intensity of high energy neutrinos from blazars. ∗Accretion Phenomena and Related Outflows, IAU Colloq. 163, 1996

The Invited Review on Joint Discussion ”High Energy Transients” on XXIIIrd General Assembly of IAU, Kioto, 1997 is presented. The simulated rates of neutron star + neutron star, neutron star + black hole and black hole + black hole mergings are considered in relation with the problem of GRBursts origin and gravitational waves detection.

where p (> 3) is a rational prime such that p ≡ 3 (mod 4) and p ≡ 1 (mod 4), respectively ; ( p ) is the Legendre symbol and h(−p) is the class number of the quadratic field Q( √−p). The formulas are apparently related to the Dirichlet L-values at s = 1. To get a typical elliptic Gauss sum, we have only to replace the Legendre symbol by the cubic or the quartic residue character, and the trigon...

Long-baseline interferometry at optical and near-infrared wavelengths is an emerging technology which is quickly becoming a useful tool to investigate stellar atmospheres and to compare observations with models. Stellar atmosphere models have so far mainly been constrained by comparisons with stellar spectra which are integrated over the stellar disks. Interferometric observations provide spati...