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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…
Absolute dimensions of detached eclipsing binaries. I. The metallic-lined system WW Aurigae
John Southworth, B Smalley, P F L Maxted +2
WW Aurigae is a detached eclipsing binary composed of two metallic-lined A-type stars orbiting each other every 2.5 days. We have determined the masses and radii of both components…
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…