Poster Session II
Project Type
Poster
Project Funding and Affiliations
National Science Foundation, Maria Mitchell Association, Space Telescope Science Institute
Faculty Mentor’s Full Name
Chantanelle Nava
Faculty Mentor’s Department
Physics & Astronomy
Additional Mentor
Geoffrey Clayton, geoffclaytonlsu@gmail.com
Abstract / Artist's Statement
Using new JWST MIRI images, we constrain the mass of dust around SN 2011ja long after explosion. SN 2011ja is a Type IIP core-collapse supernova (CCSN) in galaxy NGC 4945. The SN is difficult to identify in the MIRI images, so we apply an alignment routine which matches bright stars between MIRI and Spitzer images to locate the correct point source. Dust masses for SN 2011ja have previously been estimated at 105, 486, 637, 857, 881, 1007, and 1332 days post-explosion. These new MIRI images were taken at day 4241. We perform PSF photometry and fit analytical dust models to the spectral energy distribution. These models indicate a high cold dust mass, ∼0.13 solar masses, which suggests continued dust generation long after explosion for this object. This new late-time dust mass for SN 2011ja is consistent with dust mass measurements for objects like SN 1980k, SN 1987a, and SN 1995n at similar times post-explosion. These objects all show higher dust masses decades past their explosion dates. With this new measurement, SN 2011ja becomes another long-term case study for CCSNe dust production. These objects suggest CCSNe could be the producers of the presently unexplained large dust masses in high redshift galaxies.
Category
Physical Sciences
Late-Time MIRI Imaging of SN 2011ja Reveals High Cold Dust Mass
UC South Ballroom
Using new JWST MIRI images, we constrain the mass of dust around SN 2011ja long after explosion. SN 2011ja is a Type IIP core-collapse supernova (CCSN) in galaxy NGC 4945. The SN is difficult to identify in the MIRI images, so we apply an alignment routine which matches bright stars between MIRI and Spitzer images to locate the correct point source. Dust masses for SN 2011ja have previously been estimated at 105, 486, 637, 857, 881, 1007, and 1332 days post-explosion. These new MIRI images were taken at day 4241. We perform PSF photometry and fit analytical dust models to the spectral energy distribution. These models indicate a high cold dust mass, ∼0.13 solar masses, which suggests continued dust generation long after explosion for this object. This new late-time dust mass for SN 2011ja is consistent with dust mass measurements for objects like SN 1980k, SN 1987a, and SN 1995n at similar times post-explosion. These objects all show higher dust masses decades past their explosion dates. With this new measurement, SN 2011ja becomes another long-term case study for CCSNe dust production. These objects suggest CCSNe could be the producers of the presently unexplained large dust masses in high redshift galaxies.