2014/11/30 by J. Johansson, A. Goobar, M. M. Kasliwal +20 · 42 citations
Physics and Astronomy · #Astronomy #Astrophysical Phenomena and Observations #Astrophysics #Astrophysics and Star Formation Studies #Circumstellar disk #Extinction (optical mineralogy) #Gamma-ray bursts and supernovae #Optics #Physics #Stars #Supernova #astro-ph.CO #astro-ph.HE
paper · pdf · doi:10.1093/mnras/stw3350
published in Monthly Notices of the Royal Astronomical Society 466(3), 3442-3449 (Oxford University Press) · 9 pages, 4 figures. Published in MNRAS
openalex created_date 2016/06/24 · openalex publication_date 2017/01/04 · arxiv created 2017/02/15 · arxiv updated 2017/02/16 · openalex updated_date 2026/08/05
SN 2014J in M 82 is the closest Type Ia supernova (SN Ia) in decades. The proximity allows for detailed studies of supernova physics and provides insights into the circumstellar and interstellar environment. In this work, we analyse Spitzer mid-infrared (mid-IR) data of SN 2014J in the 3.6 and 4.5 μm wavelength range, together with several other nearby and well-studied SNe Ia. We compile the first composite mid-IR light-curve templates from our sample of SNe Ia, spanning the range from before peak brightness well into the nebular phase. Our observations indicate that SNe Ia form a very homogeneous class of objects at these wavelengths. Using the low-reddening supernovae for comparison, we constrain possible thermal emission from circumstellar dust around the highly reddened SN 2014J. We also study SNe 2006X and 2007le, where the presence of matter in the circumstellar environment has been suggested. No significant mid-IR excess is detected, allowing us to place upper limits on the amount of pre-existing dust in the circumstellar environment. For SN 2014J, Mdust ≲ 10− 5 M⊙ within rdust ∼ 1017 cm, which is insufficient to account for the observed extinction. Similar limits are obtained for SNe 2006X and 2007le.