In: Contributions of the Astronomical Observatory Skalnaté Pleso, vol. 38, no. 2
M.m. Dworetsky - A. Dyer - J.l. Persaud
Detaily:
Rok, strany: 2008, 141 - 146
Kľúčové slová:
stars: chemically peculiar, stars: abundances
URL originálneho zdroja: http://www.astro.sk/caosp/Eedition/Abstracts/2008/Vol_38/No_2/pp141-146_abstract.html
O článku:
Some individual Mercury-Manganese (HgMn) stars have known high abundances
of Sr and Y, but other studies have found normal or
undetectable abundances. We have surveyed these elements in a sample of 23
stars. In most cases the Sr lines do not suffer greatly from blending, and
the resonance line Sr II 4077 and 4215 of multiplet (1)
dominate. Yttrium has many lines visible if it is at high abundance, and we
select a subset of these which are the least blended. We find that Sr
ranges from ≈3 dex above solar abundance to abundances of ≈1 dex below solar,
while Y attains overabundances of up to 4
dex, but is very difficult to detect in the hotter sample stars even if
moderately overabundant.
Ako citovať:
ISO 690:
Dworetsky, M., Dyer, A., Persaud, J. 2008. Strontium and yttrium in HgMn stars. In Contributions of the Astronomical Observatory Skalnaté Pleso, vol. 38, no.2, pp. 141-146. 1335-1842.
APA:
Dworetsky, M., Dyer, A., Persaud, J. (2008). Strontium and yttrium in HgMn stars. Contributions of the Astronomical Observatory Skalnaté Pleso, 38(2), 141-146. 1335-1842.