THE CARNEGIE SUPERNOVA PROJECT: INTRINSIC COLORS OF TYPE Ia SUPERNOVAE

Burns, C. R.; Stritzinger, M. D.; Phillips, M. M.; Hsiao, E. Y.; Contreras, C.; Persson, S. E.; Folatelli, G.; Boldt, Luis; Campillay, A.; Castellón, S.; Freedman, Wendy L.; Madore, Barry F.; Morrell, N.; Salgado, Francisco; Suntzeff, Nicholas B.

doi:10.1088/0004-637x/789/1/32

Cited by 222 publications

(286 citation statements)

References 77 publications

(130 reference statements)

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“…1). With rather red maximum-light colours, (B −V ) max ∼ 0.5-0.6 mag (Taubenberger et al, 2008), they are more reminiscent of stripped-envelope core-collapse SNe than normal SNe Ia, and while normal SNe Ia are reddest ∼ 30 d after maximum light, 91bg-like SNe reach this point earlier, at ∼ +15 d (Burns et al, 2014). Only a month or more after maximum light, during the Fe II-dominated phase, the colours of all SNe Ia converge to a common value (Lira, 1996).…”

Section: Luminosity and Colour Evolutionmentioning

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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Section: Luminosity and Colour Evolutionmentioning

confidence: 98%

The Extremes of Thermonuclear Supernovae

Taubenberger¹

2016

Handbook of Supernovae

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“…The main source of NIR photometry of SNe Ia is the Carnegie Supernova Project (CSP; Contreras et al 2010;Burns et al 2011;Stritzinger et al 2011;Phillips 2012;Burns et al 2014). We add to this sample objects from the literature.…”

Section: Datamentioning

confidence: 99%

A reddening-free method to estimate the⁵⁶Ni mass of Type Ia supernovae

Dhawan

Leibundgut

Spyromilio

et al. 2016

A&A

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The increase in the number of Type Ia supernovae (SNe Ia) has demonstrated that the population shows greater diversity than has been assumed in the past. The reasons (e.g. parent population, explosion mechanism) for this diversity remain largely unknown. We investigated a sample of SNe Ia near-infrared light curves and correlated the phase of the second maximum with the bolometric peak luminosity. The peak bolometric luminosity is related to the time of the second maximum (relative to the B light curve maximum) as follows: L max (10 43 erg s −1 ) = (0.039 ± 0.004) × t 2 (J)(days) + (0.013 ± 0.106). 56 Ni masses can be derived from the peak luminosity based on Arnett's rule, which states that the luminosity at maximum is equal to the instantaneous energy generated by the nickel decay. We checked this assumption against recent radiative-transfer calculations of Chandrasekhar-mass delayed detonation models and find this assumption is valid to within 10% in recent radiative-transfer calculations of Chandrasekhar-mass delayed detonation models. The L max vs. t 2 relation is applied to a sample of 40 additional SNe Ia with significant reddening (E(B − V) > 0.1 mag), and a reddening-free bolometric luminosity function of SNe Ia is established. The method is tested with the 56 Ni mass measurement from the direct observation of γ-rays in the heavily absorbed SN 2014J and found to be fully consistent. Super-Chandrasekhar-mass explosions, in particular SN 2007if, do not follow the relations between peak luminosity and second IR maximum. This may point to an additional energy source contributing at maximum light. The luminosity function of SNe Ia is constructed and is shown to be asymmetric with a tail of low-luminosity objects and a rather sharp high-luminosity cutoff, although it might be influenced by selection effects.

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“…Current efforts to improve upon the most dominant systematics are focusing on the construction of homogeneous samples of low-redshift SNe Ia (e.g., Hamuy et al 2006;Ganeshalingam et al 2010;Stritzinger et al 2011b), improvements in photometric calibration techniques (e.g., Rheault et al 2010;Stubbs & Brown 2015), and an expanded understanding of SN Ia intrinsic colours and dust corrections (e.g., Folatelli et al 2010;Mandel et al 2011;Burns et al 2014). Additional efforts to further understand SN Ia progenitor systems and their explosion physics are being made through, amongst others, focused studies of their ultraviolet (UV; e.g., Foley et al 2016) and NIR properties (e.g., Hsiao et al 2013;Diamond et al 2015), as well as studies probing their immediate circumstellar environments (e.g., Sternberg et al 2011;Pan et al 2015).…”

Section: Introductionmentioning

confidence: 99%

“…For reasons outlined by Burns et al (2014), s BV is preferred over ∆m 15 to obtain the aforementioned light-curve parameters in the case of fastdeclining SNe Ia. The results are summarised in Table 8.…”

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confidence: 99%

Two transitional type Ia supernovae located in the Fornax cluster member NGC 1404: SN 2007on and SN 2011iv

Gall

Stritzinger

Ashall

et al. 2018

A&A

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We present an analysis of ultraviolet (UV) to near-infrared observations of the fast-declining Type Ia supernovae (SNe Ia) 2007on and 2011iv, hosted by the Fornax cluster member NGC 1404. The B-band light curves of SN 2007on and SN 2011iv are characterised by ∆m 15 (B) decline-rate values of 1.96 mag and 1.77 mag, respectively. Although they have similar decline rates, their peak B-and H-band magnitudes differ by ∼ 0.60 mag and ∼ 0.35 mag, respectively. After correcting for the luminosity vs. decline rate and the luminosity vs. colour relations, the peak B-band and H-band light curves provide distances that differ by ∼ 14% and ∼ 9%, respectively. These findings serve as a cautionary tale for the use of transitional SNe Ia located in early-type hosts in the quest to measure cosmological parameters. Interestingly, even though SN 2011iv is brighter and bluer at early times, by three weeks past maximum and extending over several months, its B − V colour is 0.12 mag redder than that of SN 2007on. To reconcile this unusual behaviour, we turn to guidance from a suite of spherical one-dimensional Chandrasekhar-mass delayed-detonation explosion models. In this context, 56 Ni production depends on both the so-called transition density and the central density of the progenitor white dwarf. To first order, the transition density drives the luminosity-width relation, while the central density is an important second-order parameter. Within this context, the differences in the B − V color evolution along the Lira regime suggests the progenitor of SN 2011iv had a higher central density than SN 2007on.

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THE CARNEGIE SUPERNOVA PROJECT: INTRINSIC COLORS OF TYPE Ia SUPERNOVAE

Cited by 222 publications

References 77 publications

The Extremes of Thermonuclear Supernovae

The Extremes of Thermonuclear Supernovae

A reddening-free method to estimate the⁵⁶Ni mass of Type Ia supernovae

Two transitional type Ia supernovae located in the Fornax cluster member NGC 1404: SN 2007on and SN 2011iv

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THE CARNEGIE SUPERNOVA PROJECT: INTRINSIC COLORS OF TYPE Ia SUPERNOVAE

Cited by 222 publications

References 77 publications

The Extremes of Thermonuclear Supernovae

The Extremes of Thermonuclear Supernovae

A reddening-free method to estimate the56Ni mass of Type Ia supernovae

Two transitional type Ia supernovae located in the Fornax cluster member NGC 1404: SN 2007on and SN 2011iv

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A reddening-free method to estimate the⁵⁶Ni mass of Type Ia supernovae