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

R. Amanullah; J. Johansson; A. Goobar; R. Ferretti; S. Papadogiannakis; T. Petrushevska; P. J. Brown; Y. Cao; C. Contreras; H. Dahle; N. Elias-Rosa; J. P.U. Fynbo; J. Gorosabel; L. Guaita; L. Hangard; D. A. Howell; E. Y. Hsiao; E. Kankare; M. Kasliwal; G. Leloudas; P. Lundqvist; S. Mattila; P. Nugent; M. M. Phillips; A. Sandberg; V. Stanishev; M. Sullivan; F. Taddia; G. Östlin; S. Asadi; R. Herrero-Illana; J. J. Jensen; K. Karhunen; S. Lazarevic; E. Varenius; P. Santos; S. Seethapuram Sridhar; S. H.J. Wallström; J. Wiegert

doi:10.1093/mnras/stv1505

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

R. Amanullah, J. Johansson, A. Goobar, R. Ferretti, S. Papadogiannakis, T. Petrushevska, P. J. Brown, Y. Cao, C. Contreras, H. Dahle, N. Elias-Rosa, J. P.U. Fynbo, J. Gorosabel, L. Guaita, L. Hangard, D. A. Howell, E. Y. Hsiao, E. Kankare, M. Kasliwal, G. LeloudasP. Lundqvist, S. Mattila, P. Nugent, M. M. Phillips, A. Sandberg, V. Stanishev, M. Sullivan, F. Taddia, G. Östlin, S. Asadi, R. Herrero-Illana, J. J. Jensen, K. Karhunen, S. Lazarevic, E. Varenius, P. Santos, S. Seethapuram Sridhar, S. H.J. Wallström, J. Wiegert

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Abstract

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 μm. 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) ≳ 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 ~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.

Original language	English
Pages (from-to)	3300-3328
Number of pages	29
Journal	Monthly Notices of the Royal Astronomical Society
Volume	453
Issue number	3
DOIs	https://doi.org/10.1093/mnras/stv1505
Publication status	Published - 1 Nov 2015
Externally published	Yes

Keywords

Circumstellar matter
Dust, extinction
Supernovae: general
Supernovae: individual: 2012cu
Supernovae: individual: SNe 2012cg

ASJC Scopus subject areas

Astronomy and Astrophysics
Space and Planetary Science

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10.1093/mnras/stv1505

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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., ... Wiegert, J. (2015). Diversity in extinction laws of Type Ia supernovae measured between 0.2 and 2μm. Monthly Notices of the Royal Astronomical Society, 453(3), 3300-3328. https://doi.org/10.1093/mnras/stv1505

@article{26dbf28742c44e1186a001f1fe40db4b,

title = "Diversity in extinction laws of Type Ia supernovae measured between 0.2 and 2μm",

abstract = "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 μm. 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 per cent 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.",

keywords = "Circumstellar matter, Dust, extinction, Supernovae: general, Supernovae: individual: 2012cu, Supernovae: individual: SNe 2012cg",

author = "R. Amanullah and J. Johansson and A. Goobar and R. Ferretti and S. Papadogiannakis and T. Petrushevska and Brown, {P. J.} and Y. Cao and C. Contreras and H. Dahle and N. Elias-Rosa and Fynbo, {J. P.U.} and J. Gorosabel and L. Guaita and L. Hangard and Howell, {D. A.} and Hsiao, {E. Y.} and E. Kankare and M. Kasliwal and G. Leloudas and P. Lundqvist and S. Mattila and P. Nugent and Phillips, {M. M.} and A. Sandberg and V. Stanishev and M. Sullivan and F. Taddia and G. {\"O}stlin and S. Asadi and R. Herrero-Illana and Jensen, {J. J.} and K. Karhunen and S. Lazarevic and E. Varenius and P. Santos and {Seethapuram Sridhar}, S. and Wallstr{\"o}m, {S. H.J.} and J. Wiegert",

note = "Publisher Copyright: {\textcopyright} 2015 The Authors. Published by Oxford University Press on behalf of the Royal Astronomical Society.",

year = "2015",

month = nov,

day = "1",

doi = "10.1093/mnras/stv1505",

language = "English",

volume = "453",

pages = "3300--3328",

journal = "Monthly Notices of the Royal Astronomical Society",

issn = "0035-8711",

publisher = "Oxford University Press",

number = "3",

}

Amanullah, R, Johansson, J, Goobar, A, Ferretti, R, Papadogiannakis, S, Petrushevska, T, Brown, PJ, Cao, Y, Contreras, C, Dahle, H, Elias-Rosa, N, Fynbo, JPU, Gorosabel, J, Guaita, L, Hangard, L, Howell, DA, Hsiao, EY, Kankare, E, Kasliwal, M, Leloudas, G, Lundqvist, P, Mattila, S, Nugent, P, Phillips, MM, Sandberg, A, Stanishev, V, Sullivan, M, Taddia, F, Östlin, G, Asadi, S, Herrero-Illana, R, Jensen, JJ, Karhunen, K, Lazarevic, S, Varenius, E, Santos, P, Seethapuram Sridhar, S, Wallström, SHJ & Wiegert, J 2015, 'Diversity in extinction laws of Type Ia supernovae measured between 0.2 and 2μm', Monthly Notices of the Royal Astronomical Society, vol. 453, no. 3, pp. 3300-3328. https://doi.org/10.1093/mnras/stv1505

TY - JOUR

T1 - Diversity in extinction laws of Type Ia supernovae measured between 0.2 and 2μm

AU - Amanullah, R.

AU - Johansson, J.

AU - Goobar, A.

AU - Ferretti, R.

AU - Papadogiannakis, S.

AU - Petrushevska, T.

AU - Brown, P. J.

AU - Cao, Y.

AU - Contreras, C.

AU - Dahle, H.

AU - Elias-Rosa, N.

AU - Fynbo, J. P.U.

AU - Gorosabel, J.

AU - Guaita, L.

AU - Hangard, L.

AU - Howell, D. A.

AU - Hsiao, E. Y.

AU - Kankare, E.

AU - Kasliwal, M.

AU - Leloudas, G.

AU - Lundqvist, P.

AU - Mattila, S.

AU - Nugent, P.

AU - Phillips, M. M.

AU - Sandberg, A.

AU - Stanishev, V.

AU - Sullivan, M.

AU - Taddia, F.

AU - Östlin, G.

AU - Asadi, S.

AU - Herrero-Illana, R.

AU - Jensen, J. J.

AU - Karhunen, K.

AU - Lazarevic, S.

AU - Varenius, E.

AU - Santos, P.

AU - Seethapuram Sridhar, S.

AU - Wallström, S. H.J.

AU - Wiegert, J.

PY - 2015/11/1

Y1 - 2015/11/1

N2 - 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 μm. 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 per cent 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.

AB - 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 μm. 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 per cent 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.

KW - Circumstellar matter

KW - Dust, extinction

KW - Supernovae: general

KW - Supernovae: individual: 2012cu

KW - Supernovae: individual: SNe 2012cg

UR - http://www.scopus.com/inward/record.url?scp=84947718829&partnerID=8YFLogxK

U2 - 10.1093/mnras/stv1505

DO - 10.1093/mnras/stv1505

M3 - Article

AN - SCOPUS:84947718829

SN - 0035-8711

VL - 453

SP - 3300

EP - 3328

JO - Monthly Notices of the Royal Astronomical Society

JF - Monthly Notices of the Royal Astronomical Society

IS - 3

ER -

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

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