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

Amanullah, Rahman (author)
Stockholms universitet,Fysikum,Oskar Klein-centrum för kosmopartikelfysik (OKC),Stockholm University
Johansson, Joel (author)
Stockholms universitet,Fysikum,Oskar Klein-centrum för kosmopartikelfysik (OKC),Stockholm University,Texas A and M University,Niels Bohr Institute,Instituto de Astrofisica de Andalucía (IAA),Institute of Astrophysics of Andalusia (IAA),Universidad del Pais Vasco / Euskal Herriko Unibertsitatea,University of the Basque Country (UPV/EHU)
Goobar, Ariel (author)
Stockholms universitet,Fysikum,Oskar Klein-centrum för kosmopartikelfysik (OKC),Stockholm University
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Ferretti, Raphael (author)
Stockholms universitet,Fysikum,Oskar Klein-centrum för kosmopartikelfysik (OKC),Stockholm University
Papadogiannakis, Seméli (author)
Stockholms universitet,Fysikum,Oskar Klein-centrum för kosmopartikelfysik (OKC),Stockholm University
Petrushevska, Tanja (author)
Stockholms universitet,Fysikum,Oskar Klein-centrum för kosmopartikelfysik (OKC),Stockholm University
Brown, P. J. (author)
Cao, Y. (author)
California Institute of Technology (Caltech)
Contreras, C. (author)
Las Campanas Observatory
Dahle, H. (author)
Universitetet i Oslo,University of Oslo,Las Cumbres Observatory Global Telescope Network, Inc,University of California
Elias-Rosa, N. (author)
Istituto nazionale di astrofisica (INAF)
Fynbo, J. P. U. (author)
Gorosabel, J. (author)
Guaita, L. (author)
Osservatorio Astronomico di Roma,Niels Bohr Institute,Weizmann Institute of Science
Hangard, Laura (author)
Stockholms universitet,Fysikum,Oskar Klein-centrum för kosmopartikelfysik (OKC),Stockholm University
Howell, D. A. (author)
Hsiao, E. Y. (author)
Las Campanas Observatory,Århus Universitet,Aarhus University
Kankare, E. (author)
Queen's University Belfast
Kasliwal, M. (author)
Carnegie Observatories
Leloudas, G. (author)
Lundqvist, Peter (author)
Stockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC),Stockholm University
Mattila, S. (author)
Turun Yliopisto,University of Turku,University of Southampton
Nugent, P. (author)
University of California,Lawrence Berkeley National Laboratory
Phillips, M. M. (author)
California Institute of Technology (Caltech)
Sandberg, Andreas (author)
Stockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC),Stockholm University
Stanishev, V. (author)
Instituto Superior Tecnico
Sullivan, M. (author)
Taddia, Francesco (author)
Stockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC),Stockholm University
Östlin, Göran (author)
Stockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC),Stockholm University
Asadi, Saghar (author)
Stockholms universitet,Institutionen för astronomi,Oskar Klein-centrum för kosmopartikelfysik (OKC),Stockholm University
Herrero-Illana, R. (author)
Instituto de Astrofisica de Andalucía (IAA),Institute of Astrophysics of Andalusia (IAA)
Jensen, J. J. (author)
Karhunen, K. (author)
Lazarevic, S. (author)
Univerzitet u Beogradu,University of Belgrade
Varenius, Eskil, 1986 (author)
Chalmers tekniska högskola,Chalmers University of Technology
Santos, P. (author)
Universitetet i Oslo,University of Oslo
Sridhar, S. Seethapuram (author)
Netherlands Institute for Radio Astronomy (ASTRON),Rijksuniversiteit Groningen,University of Groningen
Wallström, Sofia, 1988 (author)
Chalmers tekniska högskola,Chalmers University of Technology
Wiegert, Joachim, 1985 (author)
Chalmers tekniska högskola,Chalmers University of Technology
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 (creator_code:org_t)
2015-09-07
2015
English.
In: Monthly notices of the Royal Astronomical Society. - : Oxford University Press (OUP). - 0035-8711 .- 1365-2966. ; 453:3, s. 3300-3328
Related links:
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  • Journal article (peer-reviewed)
Abstract Subject headings
Close  
  • 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 0.2-2 mu m. 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 R-V. In particular, we note that for the two SNe with E(B - V) greater than or similar to 1 mag, for which the colour excess is dominated by dust extinction, we find R-V = 1.4 +/- 0.1 and R-V = 2.8 +/- 0.1. Adding UV photometry reduces the uncertainty of fitted R-V by similar to 50 per cent allowing us to also measure R-V 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.

Subject headings

NATURVETENSKAP  -- Fysik (hsv//swe)
NATURAL SCIENCES  -- Physical Sciences (hsv//eng)
NATURVETENSKAP  -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
NATURAL SCIENCES  -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)

Keyword

circumstellar matter
supernovae: general
supernovae: individual: SNe 2012cg
supernovae: individual: 2012cu
dust
extinction
Physics
fysik

Publication and Content Type

ref (subject category)
art (subject category)

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