... The change in the polarized optical and {\gamma}-ray emission of the Crab nebula/pulsar as observed, for the first time, by GASP and Integral may indicate that reconnection is possibly at work in the Crab nebula. ...
... new infrared spectra of the evolved planetary nebula NGC 6445 obtained with ISO ... We also argue that dust-gas separation in the nebula is not plausible. ... of the silicon-bearing grains in this nebula were able to survive exposure to hard ...
... new infrared spectra of the evolved planetary nebula NGC 6445 obtained with ISO ... We also argue that dust-gas separation in the nebula is not plausible. ... of the silicon-bearing grains in this nebula were able to survive exposure to hard ...
... The Planetary Nebula Luminosity Function of M87 and the Intracluster Stars of Virgo . ... We show that the planetary nebula luminosity function (PNLF) of M87's halo is unlike any PNLF observed to date, with a shape ...
... Upper limits (ULs) to the integral flux above 300 GeV have been set, as well as differential ULs at a level of $\sim$5% of the Crab Nebula flux. ...
... In IRAS 15452-5459 we detect a fast molecular outflow in the central region of the nebula and estimate a mass-loss rate between 1.2x10^{-4} Msun yr^{-1} (assuming optically thin emission) and 4.9x10^{-4} Msun yr^{-1} (optically thick emission). ...
... J1819-1458; observations have revealed absorption features and a bright X-ray nebula ... Velocity Structure in the Orion Nebula. II. ... position-velocity) spectra of the Orion Nebula in optical emission lines from a ...