Progenitors and explosion properties of supernova remnants hosting central compact objects: I. RCW 103 associated with the peculiar source 1E 161348−5055
[1];
- Department of Physics and Astronomy, University of Manitoba, Winnipeg, MB R3T 2N2, Canada
- Center for Theoretical Astrophysics, Los Alamos National Laboratory, Los Alamos, NM 87545, USA, Department of Astronomy, The University of Arizona, Tucson, AZ 85721, USA, Department of Physics and Astronomy, The University of New Mexico, Albuquerque, NM 87131, USA, Department of Physics, The George Washington University, Washington, DC 20052, USA
Herein, we present a Chandra and XMM–Newton imaging and spectroscopic study of the supernova remnant (SNR) RCW 103 (G332.4–00.4) containing the central compact object 1E 161348–5055. The high-resolution Chandra X-ray images reveal enhanced emission in the south-eastern and north-western regions. Equivalent width line images of Fe L, Mg, Si, and S using XMM–Newton data were used to map the distribution of ejecta. The SNR was sectioned into 56 regions best characterized by two-component thermal models. The harder component ($kT$ ~ 0.6 keV) is adequately fitted by the VPSHOCK non-equilibrium ionization model with an ionization time-scale $$n_et ~$$ 1011–1012 cm–3 s, and slightly enhanced abundances over solar values. The soft component ($kT$ ~ 0.2 keV), fitted by the APEC model, is well described by plasma in collisional ionization equilibrium with abundances consistent with solar values. Assuming a distance of 3.1 kpc and a Sedov phase of expansion into a uniform medium, we estimate an SNR age of 4.4 kyr, a swept-up mass $$M$$sw = 16 $$f_\mathrm{ s}^{-1/2}$$ D$$_{3.1}^{5/2}$$ M⊙, and a low explosion energy $$E_*$$ = 3.7 × 1049 $$f_\mathrm{ s}^{-1/2}$$ D$$_{3.1}^{5/2}$$ erg. This energy could be an order of magnitude higher if we relax the Sedov assumption, the plasma has a low filling factor, the plasma temperature is underestimated, or if the SNR is expanding into the progenitor’s wind-blown bubble. Standard explosion models did not match the ejecta yields. By comparing the fitted abundances to the most recent core-collapse nucleosynthesis models, our best estimate yields a low-mass progenitor of around 12–13 M⊙, lower than previously reported. We discuss degeneracies in the model fitting, particularly the effect of altering the explosion energy on the progenitor mass estimate.
- Research Organization:
- Los Alamos National Laboratory (LANL), Los Alamos, NM (United States)
- Sponsoring Organization:
- USDOE Laboratory Directed Research and Development (LDRD) Program; Natural Sciences and Engineering Research Council of Canada (NSERC); USDOE Office of Science (SC), Advanced Scientific Computing Research (ASCR). Scientific Discovery through Advanced Computing (SciDAC)
- Grant/Contract Number:
- SC0018297; 89233218CNA000001
- OSTI ID:
- 1563024
- Alternate ID(s):
- OSTI ID: 1599033
- Report Number(s):
- LA-UR-19-24543
- Journal Information:
- Monthly Notices of the Royal Astronomical Society, Journal Name: Monthly Notices of the Royal Astronomical Society Vol. 489 Journal Issue: 3; ISSN 0035-8711
- Publisher:
- Royal Astronomical SocietyCopyright Statement
- Country of Publication:
- United Kingdom
- Language:
- English
Web of Science
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