Institute of Astronomy

Toward 3D Spectra of Galaxies: Extinction from Inclination-dependent Composites

SpeakerTalk DateTalk Series
Ching-Wa Yip (Johns Hopkins)11 August 2010Institute of Astronomy Seminars

Abstract

Galaxies are oriented at various viewing angles and located at different distances from us, large samples of fiber-fed spectra from sky surveys therefore contain spatial information about the galaxies. Careful sample selection in avoiding biases should allow us to re-construct statistically galaxy spectra in 3D. Here I present the inclination dependency in composite spectra of star-forming disk galaxies from the Sloan Digital Sky Survey. I discuss what we learnt about extinction in the galaxies.

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