HST images of Typical hosts of long duration bursts at z~1 (Fruchter et al 2006)
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HST images of Typical hosts of long duration bursts at z~1 (Fruchter et al 2006) Unusual sites of GRBs Unusual sites of GRBs in their host in their host galaxies galaxies Lise Christensen ESO, Chile Work done with: Paul Vreeswijk Jesper Sollerman Christina Thoene Klaas Wiersema Emeric Le Floc’h
description
Unusual sites of GRBs in their host galaxies. Lise Christensen ESO, Chile Work done with: Paul Vreeswijk Jesper Sollerman Christina Thoene Klaas Wiersema Emeric Le Floc’h. HST images of Typical hosts of long duration bursts at z~1 (Fruchter et al 2006). - PowerPoint PPT Presentation
Transcript of HST images of Typical hosts of long duration bursts at z~1 (Fruchter et al 2006)
HST images of Typical hosts of long duration bursts at z~1(Fruchter et al 2006)
Unusual sites of GRBs Unusual sites of GRBs
in their host galaxiesin their host galaxies Lise Christensen ESO, Chile
Work done with: Paul VreeswijkJesper SollermanChristina ThoeneKlaas WiersemaEmeric Le Floc’h
Host of GRB 980425 - SN 1998 bw (z=0.0085)
FORS BVR VIMOS cube
SN region
Compare with archive data: Magnitudes and Colours have to match Broad band dataExtracted narrow band IFU image has to match narrow band imagesIFU extracted spectra have to match Long slit spectra
30” = 5 kpc
Location of the GRB from HST/STIS
SN region
WR region
Derived properties:
Christensen et al 2008
• H emission line fit - > velocity map -> dynamic mass• H flux -> SFR, Specific SFR <- 24 m Spitzer image• H flux / continuum -> H EW -> age• H/H -> reddening E(B-V) • Flux ratios [OIII]/H / [NII]/HOxygen abundance• Each spectrum > stellar population fitting -> stellar mass,age
12+
log(
O/H
)
unusual emission line ratios?
Dopita et al. 2006
