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6 papers · 2 filters
XMM-Newton imaging of V1818 Ori: a young stellar group on the eastern edge of the Kappa Ori ring
I. Pillitteri, S. J. Wolk, S. T. Megeath
We present the results of a 40 ks XMM-Newton observation centered on the variable star V1818 Ori. Using a combination of the XMM-Newton and AllWISE catalog data, we identify a grou…
Fe I oscillator strengths for transitions from high-lying odd-parity levels
M. T. Belmonte, J. C. Pickering, M. P. Ruffoni +4
We report new experimental Fe I oscillator strengths obtained by combining measurements of branching fractions measured with a Fourier Transform spectrometer and time-resolved lase…
Forming spectroscopic massive proto-binaries by disk fragmentation
D. M. -A. Meyer, R. Kuiper, W. Kley +2
The surroundings of massive protostars constitute an accretion disc which has numerically been shown to be subject to fragmentation and responsible for luminous accretion-driven ou…
Theoretical oscillation frequencies for solar-type dwarfs from stellar models with -atmospheres
Andreas Christ Sølvsten Jørgensen, Achim Weiss, Jakob Rørsted Mosumgaard +2
We present a new method for replacing the outermost layers of stellar models with interpolated atmospheres based on results from 3D simulations, in order to correct for structural…
Stellar laboratories. IX. New Se V, Sr IV - VII, Te VI, and I VI oscillator strengths and the Se, Sr, Te, and I abundances in the hot white dwarfs G191-B2B and RE 0503-289
T. Rauch, P. Quinet, M. Knoerzer +4
To analyze spectra of hot stars, advanced non-local thermodynamic equilibrium (NLTE) model-atmosphere techniques are mandatory. Reliable atomic data is for the calculation of such…
Observing the metal-poor solar neighbourhood: a comparison of galactic chemical evolution predictions
T. Mishenina, M. Pignatari, B. Cot'e +14
Atmospheric parameters and chemical compositions for ten stars with metallicities in the region of -2.2< [Fe/H] <-0.6 were precisely determined using high resolution, high signal t…