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Date and Time of the Query: 2019-06-25 T04:51:50 PDT
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For refcode 2016ApJ...819..152C:
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2016ApJ...819..152C Determining Type Ia Supernova Host Galaxy Extinction Probabilities and a Statistical Approach to Estimating the Absorption-to-reddening Ratio R_V_ Cikota, Aleksandar; Deustua, Susana; Marleau, Francine Abstract. We investigate limits on the extinction values of Type Ia supernovae (SNe Ia) to statistically determine the most probable color excess, E(B - V), with galactocentric distance, and use these statistics to determine the absorption-to-reddening ratio, R_V_, for dust in the host galaxies. We determined pixel-based dust mass surface density maps for 59 galaxies from the Key Insight on Nearby Galaxies: a Far-infrared Survey with Herschel (KINGFISH). We use SN Ia spectral templates to develop a Monte Carlo simulation of color excess E(B - V) with R_V_ = 3.1 and investigate the color excess probabilities E(B - V) with projected radial galaxy center distance. Additionally, we tested our model using observed spectra of SN 1989B, SN 2002bo, and SN 2006X, which occurred in three KINGFISH galaxies. Finally, we determined the most probable reddening for Sa-Sap, Sab-Sbp, Sbc-Scp, Scd-Sdm, S0, and irregular galaxy classes as a function of R/R_25_. We find that the largest expected reddening probabilities are in Sab-Sb and Sbc-Sc galaxies, while S0 and irregular galaxies are very dust poor. We present a new approach for determining the absorption-to-reddening ratio R_V_ using color excess probability functions and find values of R_V_ = 2.71 +/- 1.58 for 21 SNe Ia observed in Sab-Sbp galaxies, and R_V_ = 1.70 +/- 0.38, for 34 SNe Ia observed in Sbc-Scp galaxies. Key words: cosmology: miscellaneous, dust, extinction, galaxies: ISM, supernovae: general
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