| |
 |
| Paper: |
Near-Infrared Spectral Properties of Type Ib/Ic Supernova Progenitors and Implications for JWST and NGRST Observations |
| Volume: |
536, The Twelfth Pacific Rim Conference on Stellar Astrophysics |
| Page: |
41 |
| Authors: |
Jung, M.-K.; Yoon, S.-C. |
| Abstract: |
Direct identification of supernova progenitors has relied on the optical pre-explosion images observed with the Hubble Space Telescope (HST). HST is an effective instrument for the direct detection of type II supernova progenitors, but only 3 progenitor candidates for type Ib/Ic supernovae (SNe Ib/Ic) have been discovered: iPTF13bvn, SN 2017ein, and SN 2019yvr. Synthetic spectra of SN Ib/Ic progenitors made with the non-LTE radiative transfer code CMFGEN show that the optical brightness of compact helium star progenitors is fainter than the detection limits of most previous HST observations. But, the effect of strong emission lines and free-free emission due to hot ionized stellar winds of helium star progenitors leads to brightened near-infrared (near-IR) flux. It increases the chance of detection in near-IR despite the high surface temperature of SN Ib/Ic progenitors (T⋆ = ∼20–200 kK). In this study, we discuss the detectability and usability of near-IR data from the James Webb Space Telescope (JWST) and the Nancy Grace Roman Space Telescope (NGRST) for SN Ib/Ic progenitor studies. Detectability of JWST can be better than that of HST for heavy extinction cases (AV > 1), and the NGRST is expected to give ∼0.5 − 1 mag better limiting magnitudes than JWST with a ∼100 times wider field of view. Near-IR luminosity can give more strict mass-loss constraints for helium giant SN Ib progenitors and some near-IR colors are more useful than optical colors to distinguish the SN Ib/Ic progenitors from their possible companions or background stars. |
|
|
|
|
|
