The Peculiar SN 2005hk: Do Some Type Ia Supernovae Explode as Deflagrations?

By M. Phillips, Weidong Li, Joshua A. Frieman, Sergei Blinnikov, D. DePoy, J. Prieto, Peter A. Milne, Carlos Contreras, G. Folatelli, N. Morrell and 34 more. 2006

185 citations recorded by the source corpus.

We present extensive u′g′r′i′BVRIYJHKs photometry and optical spectroscopy of the Type Ia 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 Ia supernova.” Both supernovae exhibited high‐ionization 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 Ia supernovae. The R and I light curves of both supernovae were also peculiar in not displaying the secondary maximum observed for normal Type Ia 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 B maximum. 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⊙ of 56Ni.

Subfields: Astronomy and Astrophysics

View Paper: https://www.semanticscholar.org/paper/78cb6854082549c3a16db46a9fefa8491c5636f8

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In Astronomy and Astrophysics

1. D. Schneider
2. A. Filippenko
3. A. Riess
4. N. Smith
5. S. Jha
6. R. Kirshner
7. J. Brinkmann
8. Ryan Chornock

Citations in the corpus

• Type Ia Supernovae Are Good Standard Candles in the Near Infrared: Evidence from PAIRITEL (2007, background): “SN 2005hk is known to be an unusual SN Ia (Phillips et al. 2007; Sahu et al. 2008).”
• THE SLOAN DIGITAL SKY SURVEY-II SUPERNOVA SURVEY: SEARCH ALGORITHM AND FOLLOW-UP OBSERVATIONS (2007, background): “A sample of 41 SN targets including SN2005hk (Phillips et al. 2007) and SN2005gj (Prieto et al. 2007) for which we acquired 16 and 9 spectra, respectively, were observed spec- 15A very small fraction of the 4767 multi-epoch candidates are artefacts of image subtraction – e.g., faint dipoles that app”
• THE SLOAN DIGITAL SKY SURVEY-II: PHOTOMETRY AND SUPERNOVA IA LIGHT CURVES FROM THE 2005 DATA (2008, background): “Table 2 shows a portion of a sample data table for one of our SNe, SN2005hk, which has been discussed by Phillips et al. (2007).”
• ULTRAVIOLET LIGHT CURVES OF SUPERNOVAE WITH THE SWIFT ULTRAVIOLET/OPTICAL TELESCOPE (2009, methodology): “The optical bv light curves are consistent with available ground-based data (see Phillips et al. 2007; Wang et al. 2008, 2009) except those listed above for which the coincidence loss correction is uncertain.12 From our observations of 45 SNe, the light curves of 25 SNe (17 Ia, 3 Ib/c, and 5 II)…”
• Fourteen months of observations of the possible super-Chandrasekhar mass Type Ia Supernova 2009dc (2010, methodology): “…that the post-maximum expansion velocities of the spectral features of SN 2009dc are slightly greater than those seen in SN 2002cx by a few hundred km s−1 depending on the feature (Li et al. 2003b; Branch et al. 2004), whereas they are about equal to those of SN 2005hk (Phillips et al. 2007).”
• Comparative Direct Analysis of Type Ia Supernova Spectra. I. SN 1994D (2005, result): “As shown in previous papers (Chornock et al. 2006; Phillips et al. 2007; Stanishev et al. 2007), at multiple epochs the spectra of SN 2002cx and SN 2005hk are very similar.”
• Nearby Supernova Rates from the Lick Observatory Supernova Search. II. The Observed Luminosity Functions and Fractions of Supernovae in a Complete Sample (2010, methodology): “…of this subclass), SN 1991bg-like objects (“Ia-91bg”; Filippenko et al. 1992b; Leibundgut et al. 1993), SN 1991T-like objects (“Ia-91T”; Filippenko et al. 1992a; Phillips et al. 1992), and SN 2002cx-like objects (“Ia-02cx”; Filippenko 2003; Li et al. 2003b; Jha et al. 2006b; Phillips et al. 2007).”
• SN 2008ha: AN EXTREMELY LOW LUMINOSITY AND EXCEPTIONALLY LOW ENERGY SUPERNOVA (2009, methodology): “The SN 2005hk bolometric light curve from Phillips et al. (2007) is slightly different than the one we present.”
• TYPE Iax SUPERNOVAE: A NEW CLASS OF STELLAR EXPLOSION (2012, background): “…there have been a number of papers on individual members of this class (Li et al. 2003; Branch et al. 2004; Chornock et al. 2006; Jha et al. 2006; Phillips et al. 2007; Sahu et al. 2008; Foley et al. 2009, 2010a,c; Valenti et al. 2009; Maund et al. 2010; McClelland et al. 2010; Narayan et al.…”
• Spectropolarimetry of Supernovae (2008, background): “SN 2002cx and SN 2005hk were labeled as a “very peculiar” Type Ia showing low peak luminosity, slow decline, high ionization near peak and an unusually low expansion velocity of only about 6,000 km s−1(Li et al. 2003; Jha et al. 2006; Chornock et al. 2006; Phillips et al. 2007).”
• Determining the Type, Redshift, and Age of a Supernova Spectrum (2006, background): “Such is the case of SNe 2000cx (Li et al. 2001a), 2002cx (Li et al. 2003) and 2005hk (Phillips et al. 2007).”
• THE SPECTROSCOPIC DIVERSITY OF TYPE Ia SUPERNOVAE (2000, background): “…al. 2007a 2005bl Taubenberger et al. 2008a 2005cf Garavini et al. 2007a, Wang et al. 2009b 2005cg Quimby et al. 2006a 2005hj Quimby et al. 2007 2005hk Phillips et al. 2007 2006D Thomas et al. 2007 2006X Wang et al. 2008 2006bt Foley et al. 2010 2006dd Stritzinger et al. 2010 2006gz Hicken et al.…”
• FIRST-YEAR SLOAN DIGITAL SKY SURVEY-II SUPERNOVA RESULTS: HUBBLE DIAGRAM AND COSMOLOGICAL PARAMETERS (2009, background): “This cut removes the previously identified peculiar SNe Ia in the SDSSII sample, 2005hk (Phillips et al. 2007; Chornock et al. 2006), 2005gj (Aldering et al. 2006; Prieto et al. 2007), and SDSS-II SN 7017 (which is similar to 2005gj).”
• SUPERNOVA CONSTRAINTS AND SYSTEMATIC UNCERTAINTIES FROM THE FIRST THREE YEARS OF THE SUPERNOVA LEGACY SURVEY (2011, unknown): “…the known spectroscopically peculiar SNe 2000cx (Li et al. 2001), 2001ay (Krisciunas et al., 2011, in preparation), 2002cx (Li et al. 2003), 2005hk (Phillips et al. 2007), 2005gj (Aldering et al. 2006), 03D3bb (Howell et al. 2006), 05D1by (which is spectroscopically similar to SN 2001ay), and SN…”