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DC Field | Value | Language |
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dc.contributor.author | Chakradhari, N. K | - |
dc.contributor.author | Sahu, D. K | - |
dc.contributor.author | Anupama, G. C | - |
dc.date.accessioned | 2020-11-20T13:17:45Z | - |
dc.date.available | 2020-11-20T13:17:45Z | - |
dc.date.issued | 2019-08 | - |
dc.identifier.citation | Monthly Notices of the Royal Astronomical Society, Vol. 487, No. 2, pp. 1886-1904 | en_US |
dc.identifier.issn | 1365-2966 | - |
dc.identifier.uri | http://prints.iiap.res.in/handle/2248/7323 | - |
dc.description | Restricted Access © Royal Astronomical Society https://doi.org/10.1093/mnras/stz1358 | en_US |
dc.description.abstract | We present an extensive optical–ultraviolet photometry and analysis of a series of optical spectra of type Ia supernovae SN 2009ig and SN 2012cg. The observations range from −15 to +185 d for SN 2009ig and from −14 to 316 d for SN 2012cg, with respect to maximum light in B band. Both SN 2009ig and SN 2012cg exhibit similar properties. They have similar decline rate parameter (Δm15(B)true = 0.92 ± 0.04 for SN 2009ig and 0.93 ± 0.06 for SN 2012cg) and B band peak absolute magnitude (−19.45 ± 0.40 mag for SN 2009ig and −19.50 ± 0.31 mag for SN 2012cg). Their early spectra show high-velocity features in Si II and Ca II lines. The strong Fe III, Si III, and weak Si II λ5972 line during pre-maximum phase are indicative of hot photosphere. The post-maximum velocity evolution shows a plateau like phase with velocities ∼13 000 km s−1 for SN 2009ig and ∼10 000 km s−1 for SN 2012cg. Both events show spectral evolution similar to normal SNe Ia and fall in LVG and Core Normal subgroup. Both have smaller strength ratio [R(Si II) = 0.17 for SN 2009ig and 0.20 for SN 2012cg] consistent with smaller Δm15(B). Peak bolometric luminosities (logLmaxbol) of these events are estimated as 43.17 ± 0.16 and 43.24 ± 0.11 erg s−1 suggesting that 0.60 ± 0.20 M⊙ of 56Ni was synthesized in the explosion of SN 2009ig and 0.72 ± 0.31 M⊙ in SN 2012cg. | en_US |
dc.language.iso | en | en_US |
dc.publisher | Oxford University Press on behalf of the Royal Astronomical Society | en_US |
dc.subject | Supernovae: general | en_US |
dc.subject | Supernovae: individual: SN 2009ig | en_US |
dc.subject | Supernovae: individual: SN 2012cg | en_US |
dc.subject | Galaxies: individual: NGC 1015 | en_US |
dc.subject | Galaxies: individual: NGC 4424 | en_US |
dc.title | Optical and UV studies of type Ia supernovae SN 2009ig and SN 2012cg | en_US |
dc.type | Article | en_US |
Appears in Collections: | IIAP Publications |
Files in This Item:
File | Description | Size | Format | |
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Optical and UV studies of type Ia supernovae SN 2009ig and SN 2012cg.pdf Restricted Access | 2.77 MB | Adobe PDF | View/Open Request a copy |
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