SIMBAD references

2015MNRAS.453.3300A - Mon. Not. R. Astron. Soc., 453, 3300-3328 (2015/November-1)

Diversity in extinction laws of Type Ia supernovae measured between 0.2 and 2µm.

AMANULLAH R., JOHANSSON J., GOOBAR A., FERRETTI R., PAPADOGIANNAKIS S., PETRUSHEVSKA T., BROWN P.J., CAO Y., CONTRERAS C., DAHLE H., ELIAS-ROSA N., FYNBO J.P.U., GOROSABEL J., GUAITA L., HANGARD L., HOWELL D.A., HSIAO E.Y., KANKARE E., KASLIWAL M., LELOUDAS G., LUNDQVIST P., MATTILA S., NUGENT P., PHILLIPS M.M., SANDBERG A., STANISHEV V., SULLIVAN M., TADDIA F., OSTLIN G., ASADI S., HERRERO-ILLANA R., JENSEN J.J., KARHUNEN K., LAZAREVIC S., VARENIUS E., SANTOS P., SRIDHAR S.S., WALLSTROM S.H.J. and WIEGERT J.

Abstract (from CDS):

We present ultraviolet (UV) observations of six nearby Type Ia supernovae (SNe Ia) obtained with the Hubble Space Telescope, three of which were also observed in the near-IR (NIR) with Wide-Field Camera 3. UV observations with the Swift satellite, as well as ground-based optical and NIR data provide complementary information. The combined data set covers the wavelength range 0.2-2µm. By also including archival data of SN 2014J, we analyse a sample spanning observed colour excesses up to E(B - V) = 1.4 mag. We study the wavelength-dependent extinction of each individual SN and find a diversity of reddening laws when characterized by the total-to-selective extinction RV. In particular, we note that for the two SNe with E(B - V) ≳ 1 mag, for which the colour excess is dominated by dust extinction, we find RV = 1.4±0.1 and RV = 2.8±0.1. Adding UV photometry reduces the uncertainty of fitted RV by ∼ 50 percent allowing us to also measure RV of individual low-extinction objects which point to a similar diversity, currently not accounted for in the analyses when SNe Ia are used for studying the expansion history of the Universe.

Abstract Copyright: © 2015 The Authors Published by Oxford University Press on behalf of the Royal Astronomical Society (2015)

Journal keyword(s): circumstellar matter - supernovae: general - supernovae: individual: SNe 2012cg - supernovae: individual: 2012cu - dust, extinction

Simbad objects: 37

goto Full paper

goto View the references in ADS

To bookmark this query, right click on this link: simbad:2015MNRAS.453.3300A and select 'bookmark this link' or equivalent in the popup menu