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19 April 2024 |
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The Deepest Radio Observations of Nearby Type IA Supernovae: Constraining Progenitor Types and Optimizing Future Surveys | | Peter Lundqvist
; Esha Kundu
; Miguel A. Perez-Torres
; Stuart D. Ryder
; Claes-Ingvar Bjornsson
; Javier Moldon
; Megan K. Argo
; Robert J. Beswick
; Antxon Alberdi
; Erik C. Kool
; | | Date: |
16 Jan 2020 | | Abstract: | We report deep radio observations of nearby Type Ia Supernovae (SNe Ia) with
the electronic Multi-Element Radio Linked Interferometer Net-work (e-MERLIN),
and the Australia Telescope Compact Array (ATCA). No detections were made. With
standard assumptions for the energy densities of relativistic electrons going
into a power-law energy distribution, and the magnetic field strength
(epsilon_e = epsilon_B = 0.1), we arrive at the upper limits on mass-loss rate
for the progenitor system of SN 2013dy (2016coj, 2018gv, 2018pv, 2019np), to be
less than 12 (2.8,1.3, 2.1, 1.7)EE(-8) solar masses per year (for a wind speed
of 100 km/s). To SNe 2016coj, 2018gv, 2018pv and 2019np we add radio data for
17 other nearby SNe Ia, and model their non-detections. With the same model as
described, all 21 SNe Ia have mass-loss rates less than 4EE(-8) solar masses
per year (for a wind speed of 100 km/s). We compare those limits with the
expected mass loss rates in different single-degenerate progenitor scenarios.
We also discuss how information on epsilon_e and epsilon_B can be obtained from
late observations of SNe Ia and the youngest SN Ia remnant detected in radio,
G1.9+0.3, as well as stripped-envelope core-collapse SNe. We highlight SN
2011dh, and argue for epsilon_e approximately equal to 0.1 and epsilon_B
approximately equal to 0.0033. Finally, we discuss strategies to observe at
radio frequencies to maximize the chance of detection, given the time since
explosion, the distance to the supernova and the telescope sensitivity. | | Source: | arXiv, 2001.6070 | | Services: | Forum | Review | PDF | Favorites | |
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