The Nebula H II. 78 Leonis. (Plate 14, 15.)

Schedule , Cont . 14 : 00 - - 14 : 15

Ultra - violet absorption cross sections of isotopically substituted nitrous oxide species : 14 N 14 NO , 15 N 14 NO , 14 N 15 NO and 15 N 15 NO

The isotopically substituted nitrous oxide species 14N14NO, 15N14NO, 14N15NO and 15N15NO were investigated by ultra-violet (UV) absorption spectroscopy. High precision cross sections were obtained for the wavelength range 181 to 218 nm at temperatures of 233 and 283 K. These data are used to calculate photolytic isotopic fractionation constants as a function of wavelength. The fractionation con...

Kinematic Structure of H 2 and [fe Ii] in the Bipolar Planetary Nebula M 2-9

We present new high-dispersion long-slit infrared (IR) spectra of the double-shell bipolar planetary nebula M 2-9 in the emission lines [Fe ii] λ16435 and H2 v=1–0 S(1) λ21218. H2 spectra reveal for the first time the kinematic structure of the outer shell in M 2-9. Kinematics of the inner shell, traced by [Fe ii], resemble those of optical forbidden-lines like [N ii] λ6583, although we note su...

The metallicity of μ Leonis

Castro et al. (1996) have concluded that μ Leo has three times the solar metallicity. That conclusion is based on their own work and on rezeroed values of [Fe/H] from the literature. A review of their paper reveals that there are significant omissions from their list of literature results. In addition, their procedure for establishing zero points for values of [Fe/H] is found to be fallacious. ...

DEV 14 and HotMobile 15

T Fifth ACM Symposium on Computing for Development (DEV-5) was held on 5–6 December 2014 in San Jose, California. In its fifth edition, DEV continued its progress to becoming the premier venue to present original and innovative work on the applications, technologies, architectures, and protocols for computing in developing regions. In particular, the conference highlighted research results from...