6533b7d9fe1ef96bd126d791

RESEARCH PRODUCT

The extinction law in high redshift galaxies

E. E. FalcoJ. A. MuñozEvencio MediavillaBrian McleodChristopher S. Kochanek

subject

PhysicsMolecular cloudExtinction (astronomy)Astrophysics (astro-ph)FOS: Physical sciencesAstronomy and AstrophysicsAstrophysicsAstrophysics::Cosmology and Extragalactic Astrophysicsmedicine.disease_causeAstrophysicsRedshiftGalaxyExtinction curveSpace and Planetary ScienceLawmedicineAstrophysics::Solar and Stellar AstrophysicsFundamental plane (elliptical galaxies)UltravioletAstrophysics::Galaxy Astrophysics

description

We estimate the dust extinction laws in two intermediate redshift galaxies. The dust in the lens galaxy of LBQS1009-0252, which has an estimated lens redshift of zl~0.88, appears to be similar to that of the SMC with no significant feature at 2175 A. Only if the lens galaxy is at a redshift of zl~0.3, completely inconsistent with the galaxy colors, luminosity or location on the fundamental plane, can the data be fit with a normal Galactic extinction curve. The dust in the zl=0.68 lens galaxy for B0218+357, whose reddened image lies behind a molecular cloud, requires a very flat ultraviolet extinction curve with (formally) R(V)=12 +- 2. Both lens systems seem to have unusual extinction curves by Galactic standards.

yearjournalcountryeditionlanguage
2004-01-26
https://dx.doi.org/10.48550/arxiv.astro-ph/0401548