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26 April 2024 |
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The Progenitor of Supernova 2011dh Has Vanished | | Schuyler D. Van Dyk
; WeiKang Zheng
; Kelsey I. Clubb
; Alexei V. Filippenko
; S. Bradley Cenko
; Nathan Smith
; Ori D. Fox
; Patrick L. Kelly
; Isaac Shivvers
; Mohan Ganeshalingam
; | | Date: |
15 May 2013 | | Abstract: | We conducted Hubble Space Telescope (HST) Snapshot observations of the Type
IIb Supernova (SN) 2011dh in M51 at an age of ~641 days with the Wide Field
Camera 3. We find that the yellow supergiant star, clearly detected in pre-SN
HST images, has disappeared, implying that this star was almost certainly the
progenitor of the SN. Interpretation of the early-time SN data which led to the
inference of a compact nature for the progenitor, and to the expected survival
of this yellow supergiant, is now clearly incorrect. We also present
ground-based UBVRI light curves obtained with the Katzman Automatic Imaging
Telescope (KAIT) up to SN age ~70 days. From the light-curve shape including
the very late-time HST data, and from recent interacting binary models for SN
2011dh, we estimate that a putative surviving companion star to the now
deceased yellow supergiant could be detectable by late 2013, especially in the
ultraviolet. No obvious light echoes are detectable yet in the SN environment. | | Source: | arXiv, 1305.3436 | | Services: | Forum | Review | PDF | Favorites | |
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