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http://hdl.handle.net/20.500.12386/32657
Title: | Type IA Supernovae in Late Type Galaxies: Reddening Correction, Scale Height, and Absolute Maximum Magnitude | Authors: | DELLA VALLE, Massimo Panagia, Nino |
Issue Date: | 1992 | Journal: | THE ASTRONOMICAL JOURNAL | Number: | 104 | Issue: | 2 | First Page: | 696 | Abstract: | We have collected and analyzed the color excess data for the best photometrically studied type Ia supernovae (SNIa) which occurred in late type galaxies. From these data we find a ratio of the B band to selective extinction in the parent galaxies of R_B_ = A_B_/E(B-V)=3.35+/-0.25 (1σ). This indicates that the extinction curves in latetype galaxies have similar properties to that of our Galaxy. We obtain a new calibration for the absolute magnitude at maximum of SNIa in late type galaxies <M_B_> = - 19.24+/-0.18(1σ) + 5 log(H_0_/75), which is marginally brighter than the recent determinations for type Ia supernovae observed in elliptical (dust-free) galaxies, and appears to confirm the potential of SNIa as standard candles for distance determinations. Studying the distribution of the extinction in the parent galaxies we find an average half-width of selective extinction of {DELTA}[E(B-V)]=0.13+/-0.04 and a dispersion of extinction to SNe of σ[E(B-V)]=0.15+/-0.01. Allowing for extinction biases, the total width of the dust disk turns out to be 2τ_0_= 1.28+/-0.23 mag. These results imply that SNIa have a considerably broader distribution than the dust disk and confirm that they are older than old disk population objects, i.e., age > 1-2 billion years. Also, we conclude that total extinction thickness of late type galaxies is very similar to that of the Milky Way. | URI: | http://hdl.handle.net/20.500.12386/32657 | URL: | https://api.elsevier.com/content/abstract/scopus_id/0013003066 https://ui.adsabs.harvard.edu/abs/1992AJ....104..696D/abstract |
ISSN: | 0004-6256 | DOI: | 10.1086/116265 | Bibcode ADS: | 1992AJ....104..696D | Fulltext: | open |
Appears in Collections: | 1.01 Articoli in rivista |
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