Cosmology with superluminous supernovae

Scovacricchi, Dario; Nichol, R. C.; Bacon, David; Sullivan, M.; Prajs, S.

doi:10.1093/mnras/stv2752

Cited by 38 publications

(51 citation statements)

References 42 publications

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“…Following the work of Scovacricchi et al (2016), we can also consider the cosmological usefulness of the Euclid SLSNe-I. For this analysis we explored what could be achieved if we were to obtain a sample of 300 Euclid SLSNe-I with the redshift distribution given in Fig.…”

Section: Methodsmentioning

confidence: 99%

“…3). Therefore, it should be feasible to obtain real-time spectroscopic follow-up of these Euclid SLSNe, unlike the LSST SLSN sample where we may find ∼ 25 new SLSNe-I per week (Scovacricchi et al 2016) over the ten years of operations. Also, the intrinsic rate of SLSN-I events should be far in excess of the expected SLSN-II rate, meaning the expected contamination from such events (e.g.…”

Section: Slsn Spectroscopymentioning

confidence: 99%

“…This concept was explored in Scovacricchi et al (2016) where we investigated the potential of SLSNe-I 1 for constraining cosmological parameters. Scovacricchi et al (2016) found that even the addition of 100 SLSNe-I to present supernova (SN) samples could significantly improve the cosmological con-straints by extending the Hubble diagram into the deceleration epoch of the Universe (i.e.…”

Section: Introductionmentioning

confidence: 99%

“…Scovacricchi et al (2016) found that even the addition of 100 SLSNe-I to present supernova (SN) samples could significantly improve the cosmological con-straints by extending the Hubble diagram into the deceleration epoch of the Universe (i.e. z > 1).…”

Section: Introductionmentioning

confidence: 99%

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Euclid: Superluminous supernovae in the Deep Survey

Inserra

Nichol

Scovacricchi

et al. 2018

A&A

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Context. In the last decade, astronomers have found a new type of supernova called 'superluminous supernovae' (SLSNe) due to their high peak luminosity and long light-curves. These hydrogen-free explosions (SLSNe-I) can be seen to z ∼ 4 and therefore, offer the possibility of probing the distant Universe. Aims. We aim to investigate the possibility of detecting SLSNe-I using ESA's Euclid satellite, scheduled for launch in 2020. In particular, we study the Euclid Deep Survey (EDS) which will provide a unique combination of area, depth and cadence over the mission. Methods. We estimated the redshift distribution of Euclid SLSNe-I using the latest information on their rates and spectral energy distribution, as well as known Euclid instrument and survey parameters, including the cadence and depth of the EDS. To estimate the uncertainties, we calculated their distribution with two different set-ups, namely optimistic and pessimistic, adopting different star formation densities and rates. We also applied a standardization method to the peak magnitudes to create a simulated Hubble diagram to explore possible cosmological constraints. Results. We show that Euclid should detect approximately 140 high-quality SLSNe-I to z ∼ 3.5 over the first five years of the mission (with an additional 70 if we lower our photometric classification criteria). This sample could revolutionize the study of SLSNe-I at z > 1 and open up their use as probes of star-formation rates, galaxy populations, the interstellar and intergalactic medium. In addition, a sample of such SLSNe-I could improve constraints on a time-dependent dark energy equation-of-state, namely w(a), when combined with local SLSNe-I and the expected SN Ia sample from the Dark Energy Survey. Conclusions. We show that Euclid will observe hundreds of SLSNe-I for free. These luminous transients will be in the Euclid data-stream and we should prepare now to identify them as they offer a new probe of the high-redshift Universe for both astrophysics and cosmology.

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Section: Methodsmentioning

confidence: 99%

Section: Slsn Spectroscopymentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Euclid: Superluminous supernovae in the Deep Survey

Inserra

Nichol

Scovacricchi

et al. 2018

A&A

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“…We therefore cannot strengthen the claim that SLSNe might be standardizable candles with the current data. Future transient surveys may clarify this issue with much improved statistics (e.g., Scovacricchi et al 2016). …”

Section: Cosmology Testsmentioning

confidence: 99%

Light Curves of Hydrogen-poor Superluminous Supernovae from the Palomar Transient Factory

Gal‐Yam

Rubin

et al. 2018

ApJ

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139

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We investigate the light-curve properties of a sample of 26 spectroscopically confirmed hydrogen-poor superluminous supernovae (SLSNe-I) in the Palomar Transient Factory survey. These events are brighter than SNe Ib/c and SNe Ic-BL, on average, by about 4 and 2mag, respectively. The peak absolute magnitudes of SLSNe-I in rest-frame g band span −22M g −20 mag, and these peaks are not powered by radioactive 56 Ni, unless strong asymmetries are at play. The rise timescales are longer for SLSNe than for normal SNe Ib/c, by roughly 10 days, for events with similar decay times. Thus, SLSNe-I can be considered as a separate population based on photometric properties. After peak, SLSNe-I decay with a wide range of slopes, with no obvious gap between rapidly declining and slowly declining events. The latter events show more irregularities (bumps) in the light curves at all times. At late times, the SLSN-I light curves slow down and cluster around the 56 Co radioactive decay rate. Powering the late-time light curves with radioactive decay would require between 1 and 10 M e of Ni masses. Alternatively, a simple magnetar model can reasonably fit the majority of SLSNe-I light curves, with four exceptions, and can mimic the radioactive decay of 56 Co, up to ∼400 days from explosion. The resulting spin values do not correlate with the host-galaxy metallicities. Finally, the analysis of our sample cannot strengthen the case for using SLSNe-I for cosmology.

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Applications of Supernovae to Other Areas of Astrophysics and Physics

Branch

Wheeler

2017

Astronomy and Astrophysics Library

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Cosmology with superluminous supernovae

Cited by 38 publications

References 42 publications

Euclid: Superluminous supernovae in the Deep Survey

Euclid: Superluminous supernovae in the Deep Survey

Light Curves of Hydrogen-poor Superluminous Supernovae from the Palomar Transient Factory

Applications of Supernovae to Other Areas of Astrophysics and Physics

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