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Synthesis of the Beryllium 3131A Spectral Region
Johanna F. Ashwell, R. D. Jeffries, B. Smalley
The Beryllium spectral region of the Sun, Procyon and 4 stars in the open cluster NGC6633 up to Teff = 7500K have been synthesised using ATLAS9 model atmospheres and the MOOG spect…
Different convection models in ATLAS
Barry Smalley
Convection is an important phenomenon in the atmospheres of A-type and cooler stars. A description of convection in ATLAS models is presented, together with details of how it is sp…
Teff and log g Determinations
Barry Smalley
A discussion on the determination of effective temperature (Teff) and surface gravity (log g) is presented. The observational requirements for model-independent fundamental paramet…
Beryllium Enhancement as Evidence for Accretion in a Lithium-Rich F Dwarf
J. F. Ashwell, R. D. Jeffries, B. Smalley +3
The early F dwarf star ``J37'' in the open cluster NGC6633 shows an unusual pattern of photospheric abundances, including an order of magnitude enhancement of lithium and iron-peak…
Infall and SiO emission in V838 Mon
M. T. Rushton, T. R. Geballe, A. Evans +3
We present moderate and high resolution infrared spectroscopy of the peculiar eruptive variable V838 Mon, which underwent a series of remarkable outbursts in early 2002. During the…