ETA CARINAE’S 2014.6 SPECTROSCOPIC EVENT: THE EXTRAORDINARY He II AND N II FEATURES

ACCRETION ONTO THE COMPANION OF ETA CARINAE DURING THE SPECTROSCOPIC EVENT: III. THE He II λ4686 LINE

We continue to explore the accretion model of the massive binary system η Car by studying the anomalously high He II λ4686 line. The line appears just before periastron and disappears immediately thereafter. Based on the He II λ4686 line emission from O-stars and their modeling in the literature, we postulate that the He II λ4686 line comes from the acceleration zone of the secondary stellar wi...

spectroscopic and conductometric investigation of the interaction of ampicillin with zn(ii) and mn(ii) ions

On the He II Emission In η Carinae and the Origin of Its Spectroscopic Events

We report Hubble Space Telescope (HST) observations of emission in η Carinae near 4680 Å, presumably He II λ4687, which are not spatially resolved from the central star. The emission was not detected in the spectrum from 1998.0 to 2003.0, or after the spectroscopic event in 2003.5. It appeared in early 2003, rapidly grew to a larger brightness than the previous authors reported, and then disapp...

An inequality related to $eta$-convex functions (II)

Using the notion of eta-convex functions as generalization of convex functions, we estimate the difference between the middle and right terms in Hermite-Hadamard-Fejer inequality for differentiable mappings. Also as an application we give an error estimate for midpoint formula.

The He ( I ) and He ( II ) Photoelectron Spectra of

U V photoelectron spectra of the title com pounds are rep orted . A ssignm ents are m ade with the help of H e(I)/H e(II) intensity differences, shift effects upon substitu tion and com parison with re la ted m olecules. Previously draw n conclusions about the electronic structure of similar com ­ plexes also hold for the com pounds. It is indicated that the ionization energy for the sym m etri...