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The Peculiar Extinction Law of SN 2014J Measured with the Hubble Space Telescope

Amanullah, R. and Goobar, A. and Johansson, J. and Banerjee, D. P. K. and Venkataraman, V. and Joshi, V. and Ashok, N. M. and Cao, Y. and Kasliwal, M. M. and Kulkarni, S. R. and Nugent, P. E. and Petrushevska, T. and Stanishev, V. (2014) The Peculiar Extinction Law of SN 2014J Measured with the Hubble Space Telescope. Astrophysical Journal Letters, 788 (2). Art. No. L21. ISSN 2041-8205.

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The wavelength dependence of the extinction of Type Ia SN 2014J in the nearby galaxy M82 has been measured using UV to near-IR photometry obtained with the Hubble Space Telescope, the Nordic Optical Telescope, and the Mount Abu Infrared Telescope. This is the first time that the reddening of an SN Ia is characterized over the full wavelength range of 0.2-2 μm. A total-to-selective extinction, R_V ≥ 3.1, is ruled out with high significance. The best fit at maximum using a Galactic type extinction law yields R_V = 1.4 ± 0.1. The observed reddening of SN 2014J is also compatible with a power-law extinction, A _λ/AV = (λ/λ_V )^p as expected from multiple scattering of light, with p = –2.1 ± 0.1. After correcting for differences in reddening, SN 2014J appears to be very similar to SN 2011fe over the 14 broadband filter light curves used in our study.

Item Type:Article
Related URLs:
URLURL TypeDescription Paper
Amanullah, R.0000-0002-5559-9351
Goobar, A.0000-0002-4163-4996
Cao, Y.0000-0002-8036-8491
Kasliwal, M. M.0000-0002-5619-4938
Kulkarni, S. R.0000-0001-5390-8563
Nugent, P. E.0000-0002-3389-0586
Petrushevska, T.0000-0003-4743-1679
Additional Information:© 2014 American Astronomical Society. Received 2014 April 9; accepted 2014 May 2; published 2014 May 29. We thank Denise Taylor, Claus Leitherer, and John Mackenty at the Space Telescope Science Institute for advising and assisting us in carrying out this program. R.A. and A.G. acknowledge support from the Swedish Research Council and the Swedish Space Board. M.M.K. acknowledges support from the Hubble Fellowship and Carnegie-Princeton Fellowship. Observations were made with the Hubble Space Telescope; the Nordic Optical Telescope, operated by the Nordic Optical Telescope Scientific Association at the Observatorio del Roque de los Muchachos, La Palma, Spain; and the Mount Abu 1.2 m Infrared Telescope, India. STSDAS is a product of the Space Telescope Science Institute, which is operated by AURA for NASA. V.S. acknowledges support from Fundação para a Ciência e a Tecnologia (Ciência 2008) and grant PTDC/CTE-AST/112582/2009.
Group:Palomar Transient Factory
Funding AgencyGrant Number
Carnegie-Princeton FellowshipUNSPECIFIED
Fundação para a Ciência e a Tecnologia (FCT)UNSPECIFIED
Swedish Research CouncilUNSPECIFIED
Swedish National Space Board (SNSB)UNSPECIFIED
Subject Keywords:dust, extinction; galaxies: individual (Messier 82); supernovae: individual (SN 2014J)
Issue or Number:2
Record Number:CaltechAUTHORS:20140731-094755056
Persistent URL:
Official Citation:The Peculiar Extinction Law of SN 2014J Measured with the Hubble Space Telescope R. Amanullah et al. 2014 ApJ 788 L21
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:47701
Deposited By: Ruth Sustaita
Deposited On:31 Jul 2014 17:10
Last Modified:09 Mar 2020 13:19

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