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The volumetric rate of normal type Ia supernovae in the local universe discovered by the Palomar Transient Factory

The volumetric rate of normal type Ia supernovae in the local universe discovered by the Palomar Transient Factory
The volumetric rate of normal type Ia supernovae in the local universe discovered by the Palomar Transient Factory
We present the volumetric rate of normal type Ia supernovae (SNe Ia) discovered by the Palomar Transient Factory (PTF). Using strict data-quality cuts, and considering only periods when the PTF maintained a regular cadence, PTF discovered 90 SNe Ia at z ≤ 0.09 in a well-controlled sample over three years of operation (2010–2012). We use this to calculate the volumetric rate of SN Ia events by comparing this sample to simulations of hundreds of millions of SN Ia light curves produced in statistically representative realisations of the PTF survey. This quantifies the recovery efficiency of each PTF SN Ia event, and thus the relative weighting of each event. From this, the volumetric SN Ia rate was found to be rv=2.43±0.29(stat)+0.33−0.19(sys)×10−5SNe yr−1Mpc−3h370⁠. This represents the most precise local measurement of the SN Ia rate. We fit a simple SN Ia delay-time distribution model, ∝t−β, to our PTF rate measurement combined with a literature sample of rate measurements from surveys at higher-redshifts. We find β ∼ 1, consistent with a progenitor channel governed by the gravitational in-spiral of binary white dwarfs.
0035-8711
Frohmaier, C.
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Sullivan, M.
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Nugent, P.E.
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Dimitriadis, G.
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Bloom, J.S.
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Cenko, S.B.
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Kasliwal, M.M.
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Kulkarni, S.R.
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Maguire, K.
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Ofek, E. O.
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Poznanski, D.
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Quimby, R.M.
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Smith, M.
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Frohmaier, C.
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Sullivan, M.
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Nugent, P.E.
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Dimitriadis, G.
932e8105-b975-4cc8-ad19-efc2bae93352
Bloom, J.S.
aa189a04-6fe6-480f-9e54-e7ca50c857fb
Cenko, S.B.
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Kasliwal, M.M.
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Kulkarni, S.R.
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Maguire, K.
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Ofek, E. O.
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Poznanski, D.
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Quimby, R.M.
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Smith, M.
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Frohmaier, C., Sullivan, M., Nugent, P.E., Dimitriadis, G., Bloom, J.S., Cenko, S.B., Kasliwal, M.M., Kulkarni, S.R., Maguire, K., Ofek, E. O., Poznanski, D., Quimby, R.M. and Smith, M. (2019) The volumetric rate of normal type Ia supernovae in the local universe discovered by the Palomar Transient Factory. Monthly Notices of the Royal Astronomical Society. (doi:10.1093/mnras/stz807).

Record type: Article

Abstract

We present the volumetric rate of normal type Ia supernovae (SNe Ia) discovered by the Palomar Transient Factory (PTF). Using strict data-quality cuts, and considering only periods when the PTF maintained a regular cadence, PTF discovered 90 SNe Ia at z ≤ 0.09 in a well-controlled sample over three years of operation (2010–2012). We use this to calculate the volumetric rate of SN Ia events by comparing this sample to simulations of hundreds of millions of SN Ia light curves produced in statistically representative realisations of the PTF survey. This quantifies the recovery efficiency of each PTF SN Ia event, and thus the relative weighting of each event. From this, the volumetric SN Ia rate was found to be rv=2.43±0.29(stat)+0.33−0.19(sys)×10−5SNe yr−1Mpc−3h370⁠. This represents the most precise local measurement of the SN Ia rate. We fit a simple SN Ia delay-time distribution model, ∝t−β, to our PTF rate measurement combined with a literature sample of rate measurements from surveys at higher-redshifts. We find β ∼ 1, consistent with a progenitor channel governed by the gravitational in-spiral of binary white dwarfs.

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Type_Ia_Rate_Paper_PTF - Accepted Manuscript
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Accepted/In Press date: 14 March 2019
e-pub ahead of print date: 19 March 2019

Identifiers

Local EPrints ID: 429187
URI: https://eprints.soton.ac.uk/id/eprint/429187
ISSN: 0035-8711
PURE UUID: 6ed04792-a131-4fe4-96f3-9cead7c3bd14
ORCID for M. Sullivan: ORCID iD orcid.org/0000-0001-9053-4820
ORCID for M. Smith: ORCID iD orcid.org/0000-0002-3321-1432

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Date deposited: 22 Mar 2019 17:30
Last modified: 17 May 2019 00:30

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Contributors

Author: C. Frohmaier
Author: M. Sullivan ORCID iD
Author: P.E. Nugent
Author: G. Dimitriadis
Author: J.S. Bloom
Author: S.B. Cenko
Author: M.M. Kasliwal
Author: S.R. Kulkarni
Author: K. Maguire
Author: E. O. Ofek
Author: D. Poznanski
Author: R.M. Quimby
Author: M. Smith ORCID iD

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