IOP Publishing Ltd.;United States: American Astronomical Society
摘要:
摘要： PTF11kx was a Type Ia supernova (SN Ia) that showed time-variable absorption features, including saturated Ca II H and K lines that weakened and eventually went into emission. In this work we extend the spectral coverage of PTF11kx to 124-680 rest-frame days past maximum brightness. The late-time spectra of PTF11kx are dominated by Ha emission (with widths of full width at half-maximum intensity approximately 2000 km s super(-1)), strong Ca II emission features (~10,000 km s super(-1) wide), and a blue "quasi-continuum" due to many overlapping narrow lines of Fe II. The H alpha emission appears to increase in strength with time for ~1 yr, but it subsequently decreases significantly along with the Ca II emission. During the same epochs, multiple narrow emission features from the CSM temporally vary in strength. The varying narrow emission features, on the other hand, may indicate that the CSM is clumpy or consists of multiple thin shells. 出版者： United States: American Astronomical Society 出版日期： 2013-08-01 出處： The Astrophysical Journal, 2013-08, Vol.772 (2), p.125--7 資源來源： Institute of Physics Journals 識別號： ISSN: 0004-637X 識別號： ISSN: 1538-4357 識別號： EISSN: 1538-4357 識別號： DOI: 10.1088/0004-637x/772/2/125
