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HD 209562


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관련 글

Accurate abundance patterns of solar twins and analogs. Does the anomalous solar chemical composition come from planet formation?
We derive the abundance of 19 elements in a sample of 64 stars withfundamental parameters very similar to solar, which minimizes the impactof systematic errors in our spectroscopic 1D-LTE differential analysis,using high-resolution (R?60 000), high signal-to-noise ratio(S/N?200) spectra. The estimated errors in the elemental abundancesrelative to solar are as small as ?0.025 dex. The abundance ratios[X/Fe] as a function of [Fe/H] agree closely with previously establishedpatterns of Galactic thin-disk chemical evolution. Interestingly, themajority of our stars show a significant correlation between [X/Fe] andcondensation temperature (T_C). In the sample of 22 stars withparameters closest to solar, we find that, on average, low TCelements are depleted with respect to high TC elements in thesolar twins relative to the Sun by about 0.08 dex (?20%). Anincreasing trend is observed for the abundances as a function ofTC for 900

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관측 및 측정 데이터

별자리:물병자리
적경:22h04m49.73s
적위:-23°43'46.4"
가시등급:8.901
거리:59.524 파섹
적경상의 고유운동:-39.8
적위상의 고유운동:6
B-T magnitude:9.678
V-T magnitude:8.966

천체목록:
일반명   (Edit)
HD 1989HD 209562
TYCHO-2 2000TYC 6954-664-1
USNO-A2.0USNO-A2 0600-43936435
HIPHIP 108996

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