Contributing to the Virtual Observatory

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Contributing to the Virtual Observatory

• Theoretical Models
• Laboratory Data
• Florian Kerber, ECF 26.1.2005

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Virtual Observatory (VO)
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Binary Central Stars of PNe

• Planetary Nebulae
• F. Kerber, R. Mignani (ECF, ESO)
• Central stars and Model Atmospheres
• T. Rauch (Univ. Bamberg, Tübingen)
• SEDs, filter curves, VO Tools
• A. Micol et al. (ECF)
• Matcher, Classifier, VO Infrastructure
• H.-M. Adorf, G. Lemson, W. Voges (GAVO)

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Classifying central stars of PNe
Adorf et al., 2005, in press

• Input PN Coordinates Kerber et al. 2003, AA
  408, 1029
• Model atmospheres http//astro.uni-tuebingen.de/
  rauch

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NLTE Model atmospheres of hot stars

• He - Ni Werner, Rauch et al. 2000
• plane-parallel spherical
• hydrostatic radiative equilibrium
• about 350 atomic levels in NLTE
• about 1000 individual lines (H-Ca) millions of
  lines from iron-group elements (Kuruczs list)
• Single model takes 2 CPU days

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Properties of PN Central Stars

• Teff
• log g
• Chemical composition

Rauch et al. 2004, ASP Conf. Ser. 313, p.296
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Matching Objects across Catalogues

• GSC II, 2MASS DENIS B, V, R, I, J, H, K and
  their errors

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Classifying Central Stars of PNe
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Classifying central stars in PNe

• Normal stars, binaries, circumstellar matter,
  contamination from nebula

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Classifying Central Stars of PNe
Single CS Teff, log g
CS contaminated by PN
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Classifying Central Stars of PNe
CS plus IR excess binary or hot circumstellar
dust
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SED Classifier

• Binarity in PN central stars
• Classification of PNCS Teff, log g
• Hot Circumstellar dust
• Classification of PNe
• Classification of stellar spectra, e.g. UVES

your project
Use of sophisticated input from theory to do
science
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ST-ECF Lamp Project

• Instrument Physical Modelling Group
• M. Rosa, P. Bristow, M. Fiorentino, F. Kerber
• NIST Atomic Spectroscopy Group
• J. Reader, G. Nave, C. Sansonetti
• STScI Spectrographs Group
• P. Goudfrooij et al.
• HST Project and STIS IDT (GSFC)
• M. Niedner and B. Woodgate

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Pt/Cr-Ne Hollow Cathode Lamp
115 - 320 nm at R100,000
gt 10,000 lines

• Sansonetti, Kerber, Reader, Rosa, 2004, ApJS,
  153, 555

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STIS-Calibration Enhancement
Echelle, ? c ? 2513 Å

• Replace 2-D polynomial fit by STIS physical model
• More accurate and more homogeneous solution
  across the whole chip

of lines Pt-Ne 258
of lines Pt-Ne 258 vs Pt/Cr-Ne 1612
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High Resolution Spectroscopy

• FTS splitting of Pt lines

33 194Pt, 34 195Pt, 25 196Pt, 7 198Pt
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Metallurgy in Stars with GHRS
?

• Lupi - Pt II 1944.4683 0.0005 Å
  Kalus et al., 1998, ApJ, 494, 792

solar system Pt
50-50 196Pt/198Pt
pure 198Pt
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Lithium in low mass post-AGB Stars

• Li doublet 6707.76 6709.91Å
• Li line red-shifted by 0.2 Å
• Differential velocity invoked
• Low mass post-AGB stars
• Hot bottom burning
• Chemical evolution of Galaxy
• Database of Rare Earths at Mons University
  (D.R.E.A.M)
• 15000 wavelengths for Ce II transitions

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Lithium in low mass post-AGB Stars

• Ce II 6708.099 Å

• Ce abundance from 6708.099 Å

• Compare with Ce abundance from other lines

• No Li required

Reyniers et al. 2002, AA 395, L35
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Fundamental Physics

• Fine Structure constant ??e??????hc 1/137

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Chromium and Cosmology
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Pt/Cr-Ne Lamp Project

• Most complete data sets for Pt and Cr
• All relevant meta data from the source
• ECF and NIST as data providers to VO
• www.wavecal.org

Pathfinder to provide laboratory data to VO
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