Herschel limits on far-infrared emission from circumstellar dust around three nearby Type Ia supernovae
2013 (English)In: Monthly notices of the Royal Astronomical Society, ISSN 0035-8711, E-ISSN 1365-2966, Vol. 431, no 1, L43-L47 p.Article in journal (Refereed) Published
We report upper limits on dust emission at far-infrared (IR) wavelengths from three nearby Type Ia supernovae: SNe 2011by, 2011fe and 2012cg. Observations were carried out at 70 and 160 mu m with the Photodetector Array Camera and Spectrometer onboard the Herschel Space Observatory. None of the supernovae were detected in the far-IR, allowing us to place upper limits on the amount of pre-existing dust in the circumstellar environment. Due to its proximity, SN 2011fe provides the tightest constraints, M-dust less than or similar to 7 x 10(-3)M(circle dot) at a 3 sigma level for dust temperatures T-dust similar to 500K assuming silicate or graphite dust grains of size a = 0.1 mu m. For SNe 2011by and 2012cg the corresponding upper limits are less stringent, with M-dust less than or similar to 10(-1)M(circle dot) for the same assumptions.
Place, publisher, year, edition, pages
2013. Vol. 431, no 1, L43-L47 p.
circumstellar matter, supernovae: general, supernovae: individual: SN 2011by, supernovae: individual: SN 2011fe, supernovae: individual: SN 2012cg, dust, extinction
Astronomy, Astrophysics and Cosmology
IdentifiersURN: urn:nbn:se:su:diva-90781DOI: 10.1093/mnrasl/slt005ISI: 000318343600010OAI: oai:DiVA.org:su-90781DiVA: diva2:628637
FunderSwedish Research Council