Extensive HST ultraviolet spectra and multiwavelength observations of SN 2014J in M82 indicate reddening and circumstellar scattering by typical dust

• DOI: 10.1093/mnras/stu1378
• Publication Date: 2014-08-07T04:09:52Z
• Authors: Ryan J. Foley; O. D. Fox; C. McCully; M. M. Phillips; D. J. Sand; W. Zheng; P. Challis; A. V. Filippenko; G. Folatelli; W. Hillebrandt; E. Y. Hsiao; S. W. Jha; R. P. Kirshner; M. Kromer; G. H. Marion; M. Nelson; R. Pakmor; G. Pignata; F. K. Röpke; I. R. Seitenzahl; J. M. Silverman; M. Skrutskie; M. D. Stritzinger
• Keywords: Extinction (optical mineralogy); Circumstellar dust; Ultraviolet

SN 2014J in M82 is the closest detected Type Ia supernova (SN Ia) at least 28 years and perhaps 410 years. Despite its small distance of 3.3 Mpc, surprisingly faint, peaking V = 10.6 mag, assuming a typical luminosity, we infer an observed visual extinction A_V 2.0 +/- 0.1 mag. But this picture, with R_V 1.6 0.2, too simple to account for all observations. We combine 10 epochs (spanning month) HST/STIS ultraviolet through near-infrared spectroscopy HST/WFC3, KAIT, FanCam photometry from optical infrared 9 high-resolution TRES investigate sources reddening 2014J. argue that wide range properties caused by combination dust reddening, likely originating interstellar medium M82, scattering off circumstellar material. For model, roughly half (E(B-V ) 0.45 mag 2.6) LMC-like environment