The peculiar SN 2005hk: Do some type la supernovae explode as deflagrations?

M. M. Phillips; Weidong Li; Joshua A. Frieman; S. I. Blinnikov; Darren DePoy; José L. Prieto; P. Milne; Carlos Contreras; Gastón Folatelli; Nidia Morrell; Mario Hamuy; Nicholas B. Suntzeff; Miguel Roth; Sergio González; Wojtek Krzeminski; Alexei V. Filippenko; Wendy L. Freedman; Ryan Chornock; Saurabh Jha; Barry F. Madore; S. E. Persson; Christopher R. Burns; Pamela Wyatt; David Murphy; Ryan J. Foley; Mohan Ganeshalingam; Franklin J.D. Serduke; Kevin Krisciunas; Bruce Bassett; Andrew Becker; Ben Dilday; J. Eastman; Peter M. Garnavich; Jon Holtzman; Richard Kessler; Hubert Lampeitl; John Marriner; S. Frank; J. L. Marshall; Gajus Miknaitis; Masao Sako; Donald P. Schneider; Kurt Van Der Heyden; Naoki Yasuda

doi:10.1086/518372

The peculiar SN 2005hk: Do some type la supernovae explode as deflagrations?

M. M. Phillips, Weidong Li, Joshua A. Frieman, S. I. Blinnikov, Darren DePoy, José L. Prieto, P. Milne, Carlos Contreras, Gastón Folatelli, Nidia Morrell, Mario Hamuy, Nicholas B. Suntzeff, Miguel Roth, Sergio González, Wojtek Krzeminski, Alexei V. Filippenko, Wendy L. Freedman, Ryan Chornock, Saurabh Jha, Barry F. MadoreS. E. Persson, Christopher R. Burns, Pamela Wyatt, David Murphy, Ryan J. Foley, Mohan Ganeshalingam, Franklin J.D. Serduke, Kevin Krisciunas, Bruce Bassett, Andrew Becker, Ben Dilday, J. Eastman, Peter M. Garnavich, Jon Holtzman, Richard Kessler, Hubert Lampeitl, John Marriner, S. Frank, J. L. Marshall, Gajus Miknaitis, Masao Sako, Donald P. Schneider, Kurt Van Der Heyden, Naoki Yasuda

Astronomy

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Abstract

We present extensive u'g'r'i'BVRIYJHK.. photometry and optical spectroscopy of the Type la supernova (SN) 2005hk. These data reveal that SN 2005hk was nearly identical in its observed properties to SN 2002cx, which has been called "the most peculiar known Type la supernova." Both supernovae exhibited highionization SN 1991T-like premaximum spectra, yet low peak luminosities like that of SN 1991bg. The spectra reveal that SN 2005hk, like SN 2002cx, exhibited expansion velocities that were roughly half those of typical Type la supernovae. The R and / light curves of both supernovae were also peculiar in not displaying the secondary maximum observed for normal Type la supernovae. Our YJH photometry of SN 2005hk reveals the same peculiarity in the near-infrared. By combining our optical and near-infrared photometry of SN 2005hk with published ultraviolet light curves obtained with the Swift satellite, we are able to construct a bolometric light curve from ∼15 days before to ∼60 days after Baximum. The shape and unusually low peak luminosity of this light curve, plus the low expansion velocities and absence of a secondary maximum at red and near-infrared wavelengths, are all in reasonable agreement with model calculations of a three-dimensional deflagration that produces ∼0.2 M _Ȯ of ⁵⁶Ni.

Original language	English (US)
Pages (from-to)	360-387
Number of pages	28
Journal	Publications of the Astronomical Society of the Pacific
Volume	119
Issue number	854
DOIs	https://doi.org/10.1086/518372
State	Published - Apr 2007

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Astronomy and Astrophysics
Space and Planetary Science

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Phillips, M. M., Li, W., Frieman, J. A., Blinnikov, S. I., DePoy, D., Prieto, J. L., Milne, P., Contreras, C., Folatelli, G., Morrell, N., Hamuy, M., Suntzeff, N. B., Roth, M., González, S., Krzeminski, W., Filippenko, A. V., Freedman, W. L., Chornock, R., Jha, S., ... Yasuda, N. (2007). The peculiar SN 2005hk: Do some type la supernovae explode as deflagrations? Publications of the Astronomical Society of the Pacific, 119(854), 360-387. https://doi.org/10.1086/518372

Phillips, MM, Li, W, Frieman, JA, Blinnikov, SI, DePoy, D, Prieto, JL, Milne, P, Contreras, C, Folatelli, G, Morrell, N, Hamuy, M, Suntzeff, NB, Roth, M, González, S, Krzeminski, W, Filippenko, AV, Freedman, WL, Chornock, R, Jha, S, Madore, BF, Persson, SE, Burns, CR, Wyatt, P, Murphy, D, Foley, RJ, Ganeshalingam, M, Serduke, FJD, Krisciunas, K, Bassett, B, Becker, A, Dilday, B, Eastman, J, Garnavich, PM, Holtzman, J, Kessler, R, Lampeitl, H, Marriner, J, Frank, S, Marshall, JL, Miknaitis, G, Sako, M, Schneider, DP, Van Der Heyden, K & Yasuda, N 2007, 'The peculiar SN 2005hk: Do some type la supernovae explode as deflagrations?', Publications of the Astronomical Society of the Pacific, vol. 119, no. 854, pp. 360-387. https://doi.org/10.1086/518372

@article{8dd5133284424576832c0d86e074d76c,

title = "The peculiar SN 2005hk: Do some type la supernovae explode as deflagrations?",

abstract = "We present extensive u'g'r'i'BVRIYJHK.. photometry and optical spectroscopy of the Type la supernova (SN) 2005hk. These data reveal that SN 2005hk was nearly identical in its observed properties to SN 2002cx, which has been called {"}the most peculiar known Type la supernova.{"} Both supernovae exhibited highionization SN 1991T-like premaximum spectra, yet low peak luminosities like that of SN 1991bg. The spectra reveal that SN 2005hk, like SN 2002cx, exhibited expansion velocities that were roughly half those of typical Type la supernovae. The R and / light curves of both supernovae were also peculiar in not displaying the secondary maximum observed for normal Type la supernovae. Our YJH photometry of SN 2005hk reveals the same peculiarity in the near-infrared. By combining our optical and near-infrared photometry of SN 2005hk with published ultraviolet light curves obtained with the Swift satellite, we are able to construct a bolometric light curve from ∼15 days before to ∼60 days after Baximum. The shape and unusually low peak luminosity of this light curve, plus the low expansion velocities and absence of a secondary maximum at red and near-infrared wavelengths, are all in reasonable agreement with model calculations of a three-dimensional deflagration that produces ∼0.2 M Ȯ of 56Ni.",

author = "Phillips, {M. M.} and Weidong Li and Frieman, {Joshua A.} and Blinnikov, {S. I.} and Darren DePoy and Prieto, {Jos{\'e} L.} and P. Milne and Carlos Contreras and Gast{\'o}n Folatelli and Nidia Morrell and Mario Hamuy and Suntzeff, {Nicholas B.} and Miguel Roth and Sergio Gonz{\'a}lez and Wojtek Krzeminski and Filippenko, {Alexei V.} and Freedman, {Wendy L.} and Ryan Chornock and Saurabh Jha and Madore, {Barry F.} and Persson, {S. E.} and Burns, {Christopher R.} and Pamela Wyatt and David Murphy and Foley, {Ryan J.} and Mohan Ganeshalingam and Serduke, {Franklin J.D.} and Kevin Krisciunas and Bruce Bassett and Andrew Becker and Ben Dilday and J. Eastman and Garnavich, {Peter M.} and Jon Holtzman and Richard Kessler and Hubert Lampeitl and John Marriner and S. Frank and Marshall, {J. L.} and Gajus Miknaitis and Masao Sako and Schneider, {Donald P.} and {Van Der Heyden}, Kurt and Naoki Yasuda",

year = "2007",

month = apr,

doi = "10.1086/518372",

language = "English (US)",

volume = "119",

pages = "360--387",

journal = "Publications of the Astronomical Society of the Pacific",

issn = "0004-6280",

publisher = "Institute of Physics Publishing",

number = "854",

}

TY - JOUR

T1 - The peculiar SN 2005hk

T2 - Do some type la supernovae explode as deflagrations?

AU - Phillips, M. M.

AU - Li, Weidong

AU - Frieman, Joshua A.

AU - Blinnikov, S. I.

AU - DePoy, Darren

AU - Prieto, José L.

AU - Milne, P.

AU - Contreras, Carlos

AU - Folatelli, Gastón

AU - Morrell, Nidia

AU - Hamuy, Mario

AU - Suntzeff, Nicholas B.

AU - Roth, Miguel

AU - González, Sergio

AU - Krzeminski, Wojtek

AU - Filippenko, Alexei V.

AU - Freedman, Wendy L.

AU - Chornock, Ryan

AU - Jha, Saurabh

AU - Madore, Barry F.

AU - Persson, S. E.

AU - Burns, Christopher R.

AU - Wyatt, Pamela

AU - Murphy, David

AU - Foley, Ryan J.

AU - Ganeshalingam, Mohan

AU - Serduke, Franklin J.D.

AU - Krisciunas, Kevin

AU - Bassett, Bruce

AU - Becker, Andrew

AU - Dilday, Ben

AU - Eastman, J.

AU - Garnavich, Peter M.

AU - Holtzman, Jon

AU - Kessler, Richard

AU - Lampeitl, Hubert

AU - Marriner, John

AU - Frank, S.

AU - Marshall, J. L.

AU - Miknaitis, Gajus

AU - Sako, Masao

AU - Schneider, Donald P.

AU - Van Der Heyden, Kurt

AU - Yasuda, Naoki

PY - 2007/4

Y1 - 2007/4

N2 - We present extensive u'g'r'i'BVRIYJHK.. photometry and optical spectroscopy of the Type la supernova (SN) 2005hk. These data reveal that SN 2005hk was nearly identical in its observed properties to SN 2002cx, which has been called "the most peculiar known Type la supernova." Both supernovae exhibited highionization SN 1991T-like premaximum spectra, yet low peak luminosities like that of SN 1991bg. The spectra reveal that SN 2005hk, like SN 2002cx, exhibited expansion velocities that were roughly half those of typical Type la supernovae. The R and / light curves of both supernovae were also peculiar in not displaying the secondary maximum observed for normal Type la supernovae. Our YJH photometry of SN 2005hk reveals the same peculiarity in the near-infrared. By combining our optical and near-infrared photometry of SN 2005hk with published ultraviolet light curves obtained with the Swift satellite, we are able to construct a bolometric light curve from ∼15 days before to ∼60 days after Baximum. The shape and unusually low peak luminosity of this light curve, plus the low expansion velocities and absence of a secondary maximum at red and near-infrared wavelengths, are all in reasonable agreement with model calculations of a three-dimensional deflagration that produces ∼0.2 M Ȯ of 56Ni.

AB - We present extensive u'g'r'i'BVRIYJHK.. photometry and optical spectroscopy of the Type la supernova (SN) 2005hk. These data reveal that SN 2005hk was nearly identical in its observed properties to SN 2002cx, which has been called "the most peculiar known Type la supernova." Both supernovae exhibited highionization SN 1991T-like premaximum spectra, yet low peak luminosities like that of SN 1991bg. The spectra reveal that SN 2005hk, like SN 2002cx, exhibited expansion velocities that were roughly half those of typical Type la supernovae. The R and / light curves of both supernovae were also peculiar in not displaying the secondary maximum observed for normal Type la supernovae. Our YJH photometry of SN 2005hk reveals the same peculiarity in the near-infrared. By combining our optical and near-infrared photometry of SN 2005hk with published ultraviolet light curves obtained with the Swift satellite, we are able to construct a bolometric light curve from ∼15 days before to ∼60 days after Baximum. The shape and unusually low peak luminosity of this light curve, plus the low expansion velocities and absence of a secondary maximum at red and near-infrared wavelengths, are all in reasonable agreement with model calculations of a three-dimensional deflagration that produces ∼0.2 M Ȯ of 56Ni.

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U2 - 10.1086/518372

DO - 10.1086/518372

M3 - Article

AN - SCOPUS:34249327618

SN - 0004-6280

VL - 119

SP - 360

EP - 387

JO - Publications of the Astronomical Society of the Pacific

JF - Publications of the Astronomical Society of the Pacific

IS - 854

ER -

The peculiar SN 2005hk: Do some type la supernovae explode as deflagrations?

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