Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006pasj...58.1023s&link_type=abstract
Publications of the Astronomical Society of Japan, Vol.58, No.6, pp.1023-1032
Astronomy and Astrophysics
Astronomy
12
Stars: Abundances, Stars: Atmosphere, Stars: Γ, Doradus Type, Stars: Individual (Hd 218396), Stars: Λ Bootis Type, Stars: Vega-Like
Scientific paper
The elemental abundances of 16 elements in the Vega-like and γ Doradus-type variable star HD 218396 have been determined. A model atmosphere with Teff = 7250K, log g = 4.30, and a metallicity of [M/H] = -0.50 was used. A moderate, but definite, deficiency in the abundance of iron, [Fe/H] = -0.55±0.1, has been confirmed. Other elements, Na through Ba, are also as under-abundant as Fe. On the other hand, two light elements, C and O, show solar abundances. These findings confirm the λ Bootis nature of this star, which had been so classified based on a low-resolution optical spectrum. The observed abundance pattern provides a constraint in understanding the nature of this interesting object, which shows excess emission in the infrared region, implying that the star is accompanied by a dusty-debris disk, and at the same time shows photometric and spectroscopic variations arising from non-radial high-order g-mode pulsations.
No associations
LandOfFree
λ Bootis-Like Abundances in the Vega-Like, γ Doradus Type-Pulsator HD 218396 does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with λ Bootis-Like Abundances in the Vega-Like, γ Doradus Type-Pulsator HD 218396, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and λ Bootis-Like Abundances in the Vega-Like, γ Doradus Type-Pulsator HD 218396 will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1551488