Spatiallyresolved Spectroscopy of C2002 C1 IkeyaZhang with HST

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Spatially-resolved Spectroscopy of C/2002
C1(Ikeya-Zhang) with HST

• H. A. Weaver (JHU/APL), P.D. Feldman (JHU),
• M. F. AHearn (UMD), C. Arpigny (U. Liege),
• M. R. Combi (U. Mich.), M. C. Festou (Obs.
• Midi-Pyrenees), G. P. Tozzi (Arcetri)

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HST/STIS Observaton Log C/Ikeya-Zhang

r 0.91 AU, r 29 km/s, ? 0.42 AU, ? 89º
"
"
1" 305 km 1 MAMA pixel 0.024 7.3 km 1 CCD
pixel 0.050 15 km
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STIS CCD Images (broadband)
Sun

• Strong, rotating jet

Raw
Ratio
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Spectral Images MAMA
C
C2

• HO

H
O
CO
CS
S
S2
CO Cameron
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Spectral Images CCD
OH
CS
NH
S2
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G230L S2 Bands
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G230L Spectral Images
Minus Continuum
Raw
25"
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OH Spatial Profile vs Vectorial Model
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CS Spatial ProfilevsVectorial Model
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S2 Spatial Profile vs Haser Model
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Production Rates and Abundances

• C/Ikeya-Zhang had
• moderate CO abundance
• normal CS2 abundance
• normal range of S2

• Lifetimes
• CS2 longer than expected
• S2 is short, but maybe
• longer than expected