期刊
ASTROPHYSICAL JOURNAL
卷 756, 期 2, 页码 -出版社
IOP PUBLISHING LTD
DOI: 10.1088/0004-637X/756/2/173
关键词
circumstellar matter; stars: mass-loss; stars: winds, outflows; supernovae: individual (SN 2005ip, SN 2006jd)
资金
- NSF [AST-0306969, AST-0607438, AST-1008343]
- Swedish Research Council
- Swedish National Space Board
- NASA
- CONICYT through FONDECYT [3110142]
- Millennium Center for Supernova Science [P10-064-F]
- Danish National Research Foundation
- National Aeronautics and Space Administration
- STFC [ST/F007159/1] Funding Source: UKRI
- Science and Technology Facilities Council [ST/F007159/1] Funding Source: researchfish
- Division Of Astronomical Sciences
- Direct For Mathematical & Physical Scien [1008343] Funding Source: National Science Foundation
- Grants-in-Aid for Scientific Research [23740175] Funding Source: KAKEN
We present an observational study of the Type IIn supernovae (SNe IIn) 2005ip and 2006jd. Broadband UV, optical, and near-IR photometry, and visual-wavelength spectroscopy of SN 2005ip complement and extend upon published observations to 6.5 years past discovery. Our observations of SN 2006jd extend from UV to mid-infrared wavelengths, and like SN 2005ip, are compared to reported X-ray measurements to understand the nature of the progenitor. Both objects display a number of similarities with the 1988Z-like subclass of SN IIn including (1) remarkably similar early-and late-phase optical spectra, (2) a variety of high-ionization coronal lines, (3) long-duration optical and near-IR emission, and (4) evidence of cold and warm dust components. However, diversity is apparent, including an unprecedented late-time r-band excess in SN 2006jd. The observed differences are attributed to differences between the mass-loss history of the progenitor stars. We conclude that the progenitor of SN 2006jd likely experienced a significant mass-loss event during its pre-SN evolution akin to the great 19th century eruption of. Carinae. Contrarily, as advocated by Smith et al., the circumstellar environment of SN 2005ip is found to be more consistent with a clumpy wind progenitor.
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