Post on 13-Jan-2016
description
Abundances ofAbundances ofRefractory Elements Refractory Elements for Planet-Host Starsfor Planet-Host Stars
Lee, Sang-GakSeoul National University
Kim, Kang-MinKorea Astronomy and Space Science Institute
2009. 10. 9.
Kang, WonseokSeoul National University
The 4The 4thth Workshop on Extra-solar Planet Search with Accurate Radial Velocity Workshop on Extra-solar Planet Search with Accurate Radial Velocity Measurements in Japan, 2009Measurements in Japan, 2009
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OUTLINEOUTLINEOUTLINEOUTLINEIntroductionObservationsProcess Measure the EWs Determine the parameters of model atmosphere The abundances analysis
Statistics Radial velocities Model parameters
AbundancesSummary
The 4The 4thth Workshop on Extra-solar Planet Search with Accurate Radial Velocity Workshop on Extra-solar Planet Search with Accurate Radial Velocity Measurements in Japan, 2009Measurements in Japan, 2009
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INTRODUCTIONINTRODUCTIONINTRODUCTIONINTRODUCTIONAbundances for Planet-Host Stars (PHSs) Information of protoplanetary circumstance
Dust and planetesimal fomation in protoplanetary disks Stellar atmosphere conserves the primordial composition
Criteria for the planet-searchingPossibility to find the relationship between stellar abundance and exoplanet properties
Abundances of Refractory Elements Important in condensation process in the early stage of protoplan
etary disksespecially near the host star, the inside of ice line
Earth-life lives on the surface which is relatively abundant in refractory elements
Metabolism
The 4The 4thth Workshop on Extra-solar Planet Search with Accurate Radial Velocity Workshop on Extra-solar Planet Search with Accurate Radial Velocity Measurements in Japan, 2009Measurements in Japan, 2009
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OBSERVATIONSOBSERVATIONSOBSERVATIONSOBSERVATIONSObservation In 2008 and 2009 With BOES at BOAO (Bohyunsan Optical Astronomy Observatory) Obtain the spectra of 98 star samples
Selected by the magnitude and declination.64 Known PHSs 34 Unknown samples
R ~ 30,000 / 45,000 (fiber: 300μm / 200μm) S/N ~ 100-300 at 5500Å
Samples for This Work Limited to G-type stars – 52 stars
Known PHSs – 34 / Unknown - 18
The 4The 4thth Workshop on Extra-solar Planet Search with Accurate Radial Velocity Workshop on Extra-solar Planet Search with Accurate Radial Velocity Measurements in Japan, 2009Measurements in Japan, 2009
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SAMPLESSAMPLESSAMPLESSAMPLES
The 4The 4thth Workshop on Extra-solar Planet Search with Accurate Radial Velocity Workshop on Extra-solar Planet Search with Accurate Radial Velocity Measurements in Japan, 2009Measurements in Japan, 2009
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PROCESSPROCESSPROCESSPROCESSMeasurement of EWs Using TAME program ( SSPEC at previous workshop)
Tools for Automatic Measurement for Equivalent-widths Total 13555 EWs of 52 stars ( Fe : 6246 / Others : 7309 )
Fit with Gaussian / Voigt profileLine list ; Gilli et al. 2006 / Cohen et al. 2009 / VALD15 elements
Calculate RVs from the center wavelength of fitting profiles
Determination of Model Atmosphere Parameters Using MOOGFE code with MOOG code & Kurucz ATLAS9 model Self-consistent fine analysis for Fe I/II lines
Calculate abundance of iron lines with starting model atmosphereCheck the slopes of iron abundancesAdjust the parameters of model atmosphereRemake the model atmosphere with new parameters(Iterate these processes)
For the Sun [Fe/H] = 0.00, TEff = 5823, log g = 4.41, ξ t = 0.98
The 4The 4thth Workshop on Extra-solar Planet Search with Accurate Radial Velocity Workshop on Extra-solar Planet Search with Accurate Radial Velocity Measurements in Japan, 2009Measurements in Japan, 2009
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STATISTICSSTATISTICSSTATISTICSSTATISTICSModel Parameters Compared with 3 References
Cayrel et al. 2001 SPOCS Catalog (Valenti & Fischer, 2005) Gilli et al. 2006
The 4The 4thth Workshop on Extra-solar Planet Search with Accurate Radial Velocity Workshop on Extra-solar Planet Search with Accurate Radial Velocity Measurements in Japan, 2009Measurements in Japan, 2009
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STATISTICSSTATISTICSSTATISTICSSTATISTICSRV Results Calculated by TAME fitting results Compared with the references
SIMBADGeneral Catalogue of
Stellar Radial Velocities (1953, 1979)
The Geneva-Copenhagen Survey (2004)
SPOCS catalog Valenti & Fischer 2005
Difference average & σ ΔRV [km/s] = RVTHIS – RVSIMBAD
- for each star
NLines / σLines [km/s]
- the lines for each star
The 4The 4thth Workshop on Extra-solar Planet Search with Accurate Radial Velocity Workshop on Extra-solar Planet Search with Accurate Radial Velocity Measurements in Japan, 2009Measurements in Japan, 2009
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STATISTICSSTATISTICSSTATISTICSSTATISTICSAbundance Difference (Gilli et al. 2006)
Hyperfine structure
The 4The 4thth Workshop on Extra-solar Planet Search with Accurate Radial Velocity Workshop on Extra-solar Planet Search with Accurate Radial Velocity Measurements in Japan, 2009Measurements in Japan, 2009
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STATISTICSSTATISTICSSTATISTICSSTATISTICSAbundance Average & σ
The 4The 4thth Workshop on Extra-solar Planet Search with Accurate Radial Velocity Workshop on Extra-solar Planet Search with Accurate Radial Velocity Measurements in Japan, 2009Measurements in Japan, 2009
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ABUNDANCESABUNDANCESABUNDANCESABUNDANCESMetallicity [Fe/H]
The 4The 4thth Workshop on Extra-solar Planet Search with Accurate Radial Velocity Workshop on Extra-solar Planet Search with Accurate Radial Velocity Measurements in Japan, 2009Measurements in Japan, 2009
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ABUNDANCESABUNDANCESABUNDANCESABUNDANCESMg I (α element)
Background small points from Bensby et al. 2005 / Mishenina et al. 2004 / Soubiran et al. 2005
The 4The 4thth Workshop on Extra-solar Planet Search with Accurate Radial Velocity Workshop on Extra-solar Planet Search with Accurate Radial Velocity Measurements in Japan, 2009Measurements in Japan, 2009
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ABUNDANCESABUNDANCESABUNDANCESABUNDANCESSc II (α element)
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ABUNDANCESABUNDANCESABUNDANCESABUNDANCESTi I (α element)
The 4The 4thth Workshop on Extra-solar Planet Search with Accurate Radial Velocity Workshop on Extra-solar Planet Search with Accurate Radial Velocity Measurements in Japan, 2009Measurements in Japan, 2009
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ABUNDANCESABUNDANCESABUNDANCESABUNDANCESMn I (iron-peak element)
The 4The 4thth Workshop on Extra-solar Planet Search with Accurate Radial Velocity Workshop on Extra-solar Planet Search with Accurate Radial Velocity Measurements in Japan, 2009Measurements in Japan, 2009
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ABUNDANCESABUNDANCESABUNDANCESABUNDANCESZn I (iron-peak element)
The 4The 4thth Workshop on Extra-solar Planet Search with Accurate Radial Velocity Workshop on Extra-solar Planet Search with Accurate Radial Velocity Measurements in Japan, 2009Measurements in Japan, 2009
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ABUNDANCESABUNDANCESABUNDANCESABUNDANCESBa II
The 4The 4thth Workshop on Extra-solar Planet Search with Accurate Radial Velocity Workshop on Extra-solar Planet Search with Accurate Radial Velocity Measurements in Japan, 2009Measurements in Japan, 2009
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SUMMARY & FURTURE WORKSSUMMARY & FURTURE WORKSSUMMARY & FUTURE WORKSSUMMARY & FUTURE WORKSWe examined the abundances of 15 elements for 52 G-type samples ( PHSs : 34 )
[Mn/Fe] is high for PHSs The more Mn & Zn lines have to be added The synthetic spectrum with hyperfine structure
[Sc/Fe] and [Ti/Fe] tend to increase for PHSs in [Fe/H] < 0 Need more samples in [Fe/H] < 0
[Ba/Fe] of single-planet system is higher than that of multi-planet system
We plan to estimate abundance of Carbon, Oxygen, Sulfur Sulfur metabolism in the early stage of life-evolution
The 4The 4thth Workshop on Extra-solar Planet Search with Accurate Radial Velocity Workshop on Extra-solar Planet Search with Accurate Radial Velocity Measurements in Japan, 2009Measurements in Japan, 2009
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