THE RISE AND FALL OF TYPE Ia SUPERNOVA LIGHT CURVES IN THE SDSS-II SUPERNOVA SURVEY

Hayden, Brian; Garnavich, P.; Keßler, R.; Frieman, Joshua A.; Jha, Saurabh W.; Bassett, Bruce A.; Cinabro, D.; Dilday, Benjamin; Kasen, Daniel; Marriner, J.; Nichol, R. C.; Riess, Adam G.; Šako, M.; Schneider, Donald P.; Smith, M.; Sollerman, J.

doi:10.1088/0004-637x/712/1/350

Cited by 115 publications

(161 citation statements)

References 93 publications

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“…They found that the SN extinction, which is proportional to the mean column density over the photodisk, would likely vary with time by a substantial amount over a period spanning 140 days from the time of explosion. Their Figure 8 showed especially dramatic variations within 60 days after explosion, corresponding to a phase of approximately 43 days (e.g., Hayden et al 2010). This is the period when most light curve measurements for cosmology applications are made.…”

Section: Summary Of Relevant Results In P10 and F13mentioning

confidence: 99%

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On the Time Variation of Dust Extinction and Gas Absorption for Type Ia Supernovae Observed through a Nonuniform Interstellar Medium

Huang

Aldering

Biederman

et al. 2017

ApJ

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For Type Ia supernovae (SNe Ia) observed through a non-uniform interstellar medium (ISM) in its host galaxy, we investigate whether the non-uniformity can cause observable time variations in dust extinction and in gas absorption due to the expansion of the SN photosphere with time. We show that, owing to the steep spectral index of the ISM density power spectrum, sizable density fluctuation amplitudes at the length scale of typical ISM structures ( 10 pc) will translate to much smaller fluctuations on the scales of a SN photosphere. Therefore the typical amplitude of time variation due to non-uniform ISM, of absorption equivalent widths and of extinction, would be small. As a result, we conclude that non-uniform ISM density should not impact cosmology measurements based on SNe Ia. We apply our predictions based on the ISM density power law power spectrum to the observations of two highly reddened SNe Ia, SN 2012cu and SN 2014J.

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Section: Summary Of Relevant Results In P10 and F13mentioning

confidence: 99%

“…Finally, it is instructive to see how the extinction fluctuation RMS depends on the phase. Employing the equation for the diameter of the photodisk t days after explosion given by P10, in terms of the phase T (= t + 17.4; e.g., Hayden et al 2010), for γ = −2.9, we can write: …”

Section: Normalization For Extinction Fluctuationsmentioning

confidence: 99%

On the Time Variation of Dust Extinction and Gas Absorption for Type Ia Supernovae Observed through a Nonuniform Interstellar Medium

Huang

Aldering

Biederman

et al. 2017

ApJ

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“…Thus, the B-band maximum occured ∼17.2 days after explosion, very similar to the value derived by Foley et al (2012a) for SN 2009ig (17.13 days), which was also discovered in less than a day after explosion. The average value for the majority of "normal" SNe Ia is ∼17.4 ± 0.2 days (Hayden et al 2010). This supports the conclusion from spectroscopy that SN 2011fe is a "normal" SN Ia.…”

Section: Constraining the Moment Of Explosion And B-band Maximummentioning

confidence: 98%

Testing supernovae Ia distance measurement methods with SN 2011fe

Vinkó¹,

Sárneczky²,

Takáts³

et al. 2012

A&A

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Aims. The nearby, bright, almost completely unreddened Type Ia supernova 2011fe in M101 provides a unique opportunity to test both the precision and the accuracy of the extragalactic distances derived from SNe Ia light curve fitters. Methods. We applied the current, public versions of the independent light curve fitting codes MLCS2k2 and SALT2 to compute the distance modulus of SN 2011fe from high-precision, multi-color (BVRI) light curves. Results. The results from the two fitting codes confirm that 2011fe is a "normal" (not peculiar) and only slightly reddened SN Ia. New unreddened distance moduli are derived as 29.21 ± 0.07 mag (D ∼ 6.95 ± 0.23 Mpc, MLCS2k2), and 29.05 ± 0.07 mag (6.46 ± 0.21 Mpc). Conclusions. Despite the very good fitting quality achieved with both light curve fitters, the resulting distance moduli are inconsistent by 2σ. Both are marginally consistent (at ∼1σ) with the Hubble Space Telescope key project distance modulus for M101. The SALT2 distance is in good agreement with the recently revised Cepheid-and TRGB-distance to M101. Averaging all SN-and Cepheid-based estimates, the absolute distance to M101 is ∼6.6 ± 0.5 Mpc.

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“…The light curves evolve very slowly. For SN 2009dc, Silverman et al (2011 reported a first detection on an image taken 21 d before B-band maximum, and estimated a rise time of 23 ± 2 d, significantly longer than in normal SNe Ia (17-20 d; Conley et al 2006;Hayden et al 2010). Also the decline rates after peak are among the slowest ever observed for SNe Ia, with ∆ m 15 (B) between 0.7 and 0.9.…”

Section: Early-time Light Curves and Peak Luminositymentioning

confidence: 98%

The Extremes of Thermonuclear Supernovae

Taubenberger¹

2016

Handbook of Supernovae

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The majority of thermonuclear explosions in the Universe seem to proceed in a rather standardised way, as explosions of carbon-oxygen (CO) white dwarfs in binary systems, leading to 'normal' Type Ia supernovae (SNe Ia). However, over the years a number of objects have been found which deviate from normal SNe Ia in their observational properties, and which require different and not seldom more extreme progenitor systems. While the 'traditional' classes of peculiar SNe Ia -luminous '91T-like' and faint '91bg-like' objects -have been known since the early 1990s, other classes of even more unusual transients have only been established 20 years later, fostered by the advent of new wide-field SN surveys such as the Palomar Transient Factory. These include the faint but slowly declining '02es-like' SNe, 'Ca-rich' transients residing in the luminosity gap between classical novae and supernovae, extremely short-lived, fast-declining transients, and the very luminous so-called 'super-Chandrasekhar' SNe Ia. Not all of them are necessarily thermonuclear explosions, but there are good arguments in favour of a thermonuclear origin for most of them. The aim of this chapter is to provide an overview of the zoo of potentially thermonuclear transients, reviewing their observational characteristics and discussing possible explosion scenarios.

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THE RISE AND FALL OF TYPE Ia SUPERNOVA LIGHT CURVES IN THE SDSS-II SUPERNOVA SURVEY

Abstract: We analyze the rise and fall times of type Ia supernova (SN Ia) light curves discovered by the Sloan Digital Sky Survey-II (SDSS-II) Supernova Survey. From a set of 391 light

Cited by 115 publications

References 93 publications

On the Time Variation of Dust Extinction and Gas Absorption for Type Ia Supernovae Observed through a Nonuniform Interstellar Medium

On the Time Variation of Dust Extinction and Gas Absorption for Type Ia Supernovae Observed through a Nonuniform Interstellar Medium

Testing supernovae Ia distance measurement methods with SN 2011fe

The Extremes of Thermonuclear Supernovae

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