An early-time infrared and optical study of the Type la supernovae SN 1994D and 1991T

Meikle, W. P. S.; Cumming, Robert; Geballe, T. R.; Lewis, James R.; Walton, N. A.; Balcells, M.; Cimatti, A.; Croom, S. M.; Dhillon, V. S.; Economou, Frossie; Jenkins, Charles; Knapen, Johan H.; Lucey, J. R.; Meadows, V.; Morris, P. W.; Pérez-Fournón, I.; Shanks, T.; Smith, L. J.; Tanvir, N. R.; Veilleux, Sylvain; Vílchez, J. M.; Wall, J. V.

doi:10.1093/mnras/281.1.263

Cited by 94 publications

(65 citation statements)

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“…This is confirmed in Fig. 13, where we compare the IR spectra of SNe 2002bo at −8.5, +11.1 and +29.4 d with those of SNe 1994D (Meikle et al 1996) and 1999ee (Hamuy et al 2002) at similar epochs. The main difference between the three SNe Ia is that the −8.5 d 10 500-Å feature is absent from the SN 1999ee spectrum.…”

Section: Infrared Spectrasupporting

confidence: 76%

“…A weak, complex P Cygni line at approximately 10 500Å is apparent. This feature was first noted in the early spectra of SN 1994D (Meikle et al 1996), who suggested either He I 10 830 or Mg II 10 926Å as plausible identifications. More detailed modelling by Mazzali & Lucy (1998) yielded a similarly ambiguous identification.…”

Section: Infrared Spectramentioning

confidence: 70%

“…Details can be obtained from the references given above. The code uses as input a model of the explosion (density versus velocity), the emergent luminosity L, the epoch t (time since explosion), the (Meikle et al 1996). The spectra have been corrected for the redshift of the parent galaxies.…”

Section: Comparison Of Observed and Synthetic Spectramentioning

confidence: 99%

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Supernova 2002bo: inadequacy of the single parameter description

Benetti¹,

Meikle²,

Stehle³

et al. 2004

Monthly Notices of the Royal Astronomical Society

180

203

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We present optical/near-infrared photometry and spectra of the type Ia SN 2002bo spanning epochs from -13 days before maximum B-band light to +102 days after. The pre-maximum optical coverage is particularly complete. In some respects, SN 2002bo behaves as a typical "Branch normal" type Ia supernova (SN Ia) at optical and IR wavelengths. We find a B-band risetime of 17.9+-0.5 days, a Dm_{15}(B) of 1.13+-0.05, and a M_B=-19.41+-0.42. However, comparison with other type Ia supernovae having similar Delta m_{15}(B) values indicates that in other respects SN 2002bo is unusual. While the optical spectra of SN 2002bo are very similar to those of SN 1984A, lower velocities and a generally more structured appearance are found in SNe 1990N, 1994D and 1998bu. For supernovae having Dm_(15)(B) > 1.2, we confirm the variation of R(SiII) (Nugent et al. 1995) with Dm_(15)(B). However, for supernovae such as SN2002bo, with lower values of Dm_(15)(B) the relation breaks down. Moreover, the evolution of R(SiII) for SN 2002bo is strikingly different from that shown by other type Ia supernovae. The velocities of SN 2002bo and 1984A derived from SII 5640A, SiII 6355A and CaII H&K lines are either much higher and/or evolve differently from those seen in other normal SNe Ia events. We suggest that the unusually low temperature, the presence of high-velocity intermediate-mass elements and the low abundance of carbon at early times indicates that burning to Si penetrated to much higher layers than in more normal type Ia supernovae. This may be indicative of a delayed-detonation explosion.Comment: Accepted to MNRAS. Some near-IR photometry has been added. The paper can be retrieved also at http://web.pd.astro.it/supern/ps/sn02bo_v17_mn2.ps.g

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Section: Infrared Spectrasupporting

confidence: 76%

Section: Infrared Spectramentioning

confidence: 70%

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Supernova 2002bo: inadequacy of the single parameter description

Benetti¹,

Meikle²,

Stehle³

et al. 2004

Monthly Notices of the Royal Astronomical Society

180

203

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“…This is illustrated in Fig. 4, where we compare the spectra of SN 1998bu at maximum light with those of the normal type Ia SNe 1981B (Branch et al 1983) and 1994D (Meikle et al 1996). The three spectra are quite similar.…”

Section: Optical Spectramentioning

confidence: 67%

An early-time infrared and optical study of the Type Ia Supernova 1998bu in M96

Hernández

Meikle

Aparicio

et al. 2002

Monthly Notices of the Royal Astronomical Society

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We present first‐season infrared (IR) and optical photometry and spectroscopy of the Type Ia Supernova 1998bu in M96. We also report optical polarimetry of this event. SN 1998bu is one of the closest type Ia supernovae of modern times, and the distance of its host galaxy is well determined. We find that SN 1998bu is both photometrically and spectroscopically normal. However, the extinction to this event is unusually high, with We find that SN 1998bu peaked at an intrinsic Adopting a distance modulus of 30.25 (Tanvir et al.) and using Phillips et al.'s relations for the Hubble constant, we obtain Combination of our IR photometry with those of Jha et al. provides one of the most complete early‐phase IR light curves for a SN Ia published so far. In particular, SN 1998bu is the first normal SN Ia for which good pre‐tBmax IR coverage has been obtained. It reveals that the J, H and K light curves peak about 5 days earlier than the flux in the B‐band curve.

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“…Still, the temperature differences among SNe Ia are presumably caused by differences in the amounts of ejected 56 Ni, and differences in the composition structures certainly are to be expected. Meikle et al (1996) displayed and discussed an infrared spectrum obtained at the time of maximum light. They considered the possibility that a P Cygni-like feature having an emission peak near 10 800 A Ê and an absorption near 10 500 A Ê could be attributed to either He i l10830 or Mg ii l10926, but found dif®culties with both identi®cations.…”

Section: Introductionmentioning

confidence: 99%

On the spectrum and nature of the peculiar Type Ia supernova 1991T

Fisher

Branch

Hatano

et al. 1999

Monthly Notices of the Royal Astronomical Society

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A parametrized supernova synthetic‐spectrum code is used to study line identifications in the photospheric‐phase spectra of the peculiar Type Ia SN 1991T, and to extract some constraints on the composition structure of the ejected matter. The inferred composition structure is not like that of any hydrodynamical model for Type Ia supernovae. Evidence that SN 1991T was overluminous for a SN Ia is presented, and it is suggested that this peculiar event was probably a substantially super‐Chandrasekhar explosion that resulted from the merger of two white dwarfs.

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An early-time infrared and optical study of the Type la supernovae SN 1994D and 1991T

Cited by 94 publications

References 0 publications

Supernova 2002bo: inadequacy of the single parameter description

Supernova 2002bo: inadequacy of the single parameter description

An early-time infrared and optical study of the Type Ia Supernova 1998bu in M96

On the spectrum and nature of the peculiar Type Ia supernova 1991T

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