NASA/IPAC EXTRAGALACTIC DATABASE
Date and Time of the Query: 2019-08-18 T10:49:45 PDT
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For refcode 2018A&A...609A.135S:
Retrieve 33 NED objects in this reference.
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Copyright by European Southern Observatory (ESO). Reproduced by permission
2018A&A...609A.135S The Carnegie Supernova Project I. Methods to estimate host-galaxy reddening of stripped-envelope supernovae Stritzinger, M. D.; Taddia, F.; Burns, C. R.; Phillips, M. M.; Bersten, M.; Contreras, C.; Folatelli, G.; Holmbo, S.; Hsiao, E. Y.; Hoeflich, P.; Leloudas, G.; Morrell, N.; Sollerman, J.; Suntzeff, N. B. Abstract. We aim to improve upon contemporary methods to estimate host-galaxy reddening of stripped-envelope (SE) supernovae (SNe). To this end the Carnegie Supernova Project (CSP-I) SE SN photometry data release, consisting of nearly three dozen objects, is used to identify a minimally reddened sub-sample for each traditionally defined spectroscopic sub-type (i.e., SNe IIb, SNe Ib, SNe Ic). Inspection of the optical and near-infrared (NIR) colors and color evolution of the minimally reddened sub-samples reveals a high degree of homogeneity, particularly between 0 d to +20 d relative to B-band maximum. This motivated the construction of intrinsic color-curve templates, which when compared to the colors of reddened SE SNe, yields an entire suite of optical and NIR color excess measurements. Comparison of optical/optical vs. optical/NIR color excess measurements indicates the majority of the CSP-I SE SNe suffer relatively low amounts of reddening (i.e., E(B-V)_host_< 0.20 mag) and we find evidence for different R_V_^host^ values among different SE SN. Fitting the color excess measurements of the seven most reddened (i.e., E(B-V)_host_> 0.20 mag) objects with the Fitzpatrick (1999, PASP, 111, 63) reddening law model provides robust estimates of the host visual-extinction A_V_^host^ and R_V_^host^. In the case of the SE SNe with relatively low amounts of reddening, a preferred value of R_V_^host^ is adopted for each sub-type, resulting in estimates of A_V_^host^ through Fitzpatrick (1999) reddening law model fits to the observed color excess measurements. Our analysis suggests SE SNe reside in galaxies characterized by a range of dust properties. We also find evidence that SNe Ic are more likely to occur in regions characterized by larger R_V_^host^ values compared to SNe IIb/Ib and they also tend to suffer more extinction. The later finding is consistent with work in the literature suggesting SNe Ic tend to occur in regions of on-going star formation. Based on observations collected at Las Campanas Observatory. Key words: supernovae: general
Retrieve 33 NED objects in this reference.
Please click here for ADS abstract

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