Comparative analysis of SN 2012dn optical spectra: Days -14 to +114

J. T. Parrent, D. A. Howell, R. A. Fesen, S. Parker, F. B. Bianco, B. Dilday, D. Sand, S. Valenti, J. Vinkó, P. Berlind, P. Challis, D. Milisavljevic, N. Sanders, G. H. Marion, J. C. Wheeler, P. Brown, M. L. Calkins, B. Friesen, R. Kirshner, T. PritchardR. Quimby, P. Roming

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

SN 2012dn is a super-Chandrasekhar mass candidate in a purportedly normal spiral (SAcd) galaxy, and poses a challenge for theories of type Ia supernova diversity.Herewe utilize the fast and highly parametrized spectrum synthesis tool, SYNAPPS, to estimate relative expansion velocities of species inferred from optical spectra obtained with six facilities. As with previous studies of normal SN Ia, we find that both unburned carbon and intermediate-mass elements are spatially coincident within the ejecta near and below 14 000 km s-1. Although the upper limit on SN 2012dn's peak luminosity is comparable to some of the most luminous normal SN Ia, we find a progenitor mass exceeding ~1.6 M is not strongly favoured by leading merger models since these models do not accurately predict spectroscopic observations of SN 2012dn and more normal events. In addition, a comparison of light curves and host-galaxy masses for a sample of literature and Palomar Transient Factory SN Ia reveals a diverse distribution of SN Ia subtypes where carbon-rich material remains unburned in some instances. Such events include SN 1991T, 1997br, and 1999aa where trace signatures of C III at optical wavelengths are presumably detected.

Original languageEnglish
Pages (from-to)3702-3723
Number of pages22
JournalMonthly Notices of the Royal Astronomical Society
Volume457
Issue number4
DOIs
Publication statusPublished - Feb 10 2016

Fingerprint

optical spectrum
carbon
ejecta
spiral galaxies
industrial plants
merger
light curve
supernovae
luminosity
signatures
galaxies
wavelength
expansion
analysis
synthesis
estimates
wavelengths

Keywords

  • Supernovae: general
  • Supernovae: individual: SN 2012dn

ASJC Scopus subject areas

  • Space and Planetary Science
  • Astronomy and Astrophysics

Cite this

Parrent, J. T., Howell, D. A., Fesen, R. A., Parker, S., Bianco, F. B., Dilday, B., ... Roming, P. (2016). Comparative analysis of SN 2012dn optical spectra: Days -14 to +114. Monthly Notices of the Royal Astronomical Society, 457(4), 3702-3723. https://doi.org/10.1093/mnras/stw239

Comparative analysis of SN 2012dn optical spectra : Days -14 to +114. / Parrent, J. T.; Howell, D. A.; Fesen, R. A.; Parker, S.; Bianco, F. B.; Dilday, B.; Sand, D.; Valenti, S.; Vinkó, J.; Berlind, P.; Challis, P.; Milisavljevic, D.; Sanders, N.; Marion, G. H.; Wheeler, J. C.; Brown, P.; Calkins, M. L.; Friesen, B.; Kirshner, R.; Pritchard, T.; Quimby, R.; Roming, P.

In: Monthly Notices of the Royal Astronomical Society, Vol. 457, No. 4, 10.02.2016, p. 3702-3723.

Research output: Contribution to journalArticle

Parrent, JT, Howell, DA, Fesen, RA, Parker, S, Bianco, FB, Dilday, B, Sand, D, Valenti, S, Vinkó, J, Berlind, P, Challis, P, Milisavljevic, D, Sanders, N, Marion, GH, Wheeler, JC, Brown, P, Calkins, ML, Friesen, B, Kirshner, R, Pritchard, T, Quimby, R & Roming, P 2016, 'Comparative analysis of SN 2012dn optical spectra: Days -14 to +114', Monthly Notices of the Royal Astronomical Society, vol. 457, no. 4, pp. 3702-3723. https://doi.org/10.1093/mnras/stw239
Parrent JT, Howell DA, Fesen RA, Parker S, Bianco FB, Dilday B et al. Comparative analysis of SN 2012dn optical spectra: Days -14 to +114. Monthly Notices of the Royal Astronomical Society. 2016 Feb 10;457(4):3702-3723. https://doi.org/10.1093/mnras/stw239
Parrent, J. T. ; Howell, D. A. ; Fesen, R. A. ; Parker, S. ; Bianco, F. B. ; Dilday, B. ; Sand, D. ; Valenti, S. ; Vinkó, J. ; Berlind, P. ; Challis, P. ; Milisavljevic, D. ; Sanders, N. ; Marion, G. H. ; Wheeler, J. C. ; Brown, P. ; Calkins, M. L. ; Friesen, B. ; Kirshner, R. ; Pritchard, T. ; Quimby, R. ; Roming, P. / Comparative analysis of SN 2012dn optical spectra : Days -14 to +114. In: Monthly Notices of the Royal Astronomical Society. 2016 ; Vol. 457, No. 4. pp. 3702-3723.
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AU - Bianco, F. B.

AU - Dilday, B.

AU - Sand, D.

AU - Valenti, S.

AU - Vinkó, J.

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AU - Challis, P.

AU - Milisavljevic, D.

AU - Sanders, N.

AU - Marion, G. H.

AU - Wheeler, J. C.

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AU - Friesen, B.

AU - Kirshner, R.

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AU - Quimby, R.

AU - Roming, P.

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