Single or double degenerate progenitors? Searching for shock emission in the SDSS-II Type Ia supernovae

Brian T. Hayden; Peter M. Garnavich; Daniel Kasen; Benjamin Dilday; Joshua A. Frieman; Saurabh W. Jha; Hubert Lampeitl; Robert C. Nichol; Masao Sako; Donald P. Schneider; Mathew Smith; Jesper Sollerman; J. Craig Wheeler

doi:10.1088/0004-637X/722/2/1691

Single or double degenerate progenitors? Searching for shock emission in the SDSS-II Type Ia supernovae

Brian T. Hayden, Peter M. Garnavich, Daniel Kasen, Benjamin Dilday, Joshua A. Frieman, Saurabh W. Jha, Hubert Lampeitl, Robert C. Nichol, Masao Sako, Donald P. Schneider, Mathew Smith, Jesper Sollerman, J. Craig Wheeler

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Abstract

From the set of nearly 500 spectroscopically confirmed Type Ia supernovae (SNe) and around 10,000 unconfirmed candidates from SDSS-II, we select a subset of 108 confirmed SNe Ia with well-observed early-time light curves to search for signatures from shock interaction of the SN with a companion star. No evidence for shock emission is seen; however, the cadence and photometric noise could hide a weak shock signal. We simulate shocked light curves using SN Ia templates and a simple Gaussian shock model to emulate the noise properties of the SDSS-II sample and estimate the detectability of the shock interaction signal as a function of shock amplitude, shock width, and shock fraction. We find no direct evidence for shock interaction in the rest-frame B-band, but place an upper limit on the shock amplitude at 9% of SN peak flux (M_b >-16.6 mag). If the single degenerate channel dominates type Ia progenitors, this result constrains the companion stars to be less than about 6 M _⊙ on the main sequence and strongly disfavors red giant companions.

Original language	English (US)
Pages (from-to)	1691-1698
Number of pages	8
Journal	Astrophysical Journal
Volume	722
Issue number	2
DOIs	https://doi.org/10.1088/0004-637X/722/2/1691
State	Published - Oct 20 2010

All Science Journal Classification (ASJC) codes

Astronomy and Astrophysics
Space and Planetary Science

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Hayden, B. T., Garnavich, P. M., Kasen, D., Dilday, B., Frieman, J. A., Jha, S. W., Lampeitl, H., Nichol, R. C., Sako, M., Schneider, D. P., Smith, M., Sollerman, J., & Wheeler, J. C. (2010). Single or double degenerate progenitors? Searching for shock emission in the SDSS-II Type Ia supernovae. Astrophysical Journal, 722(2), 1691-1698. https://doi.org/10.1088/0004-637X/722/2/1691

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abstract = "From the set of nearly 500 spectroscopically confirmed Type Ia supernovae (SNe) and around 10,000 unconfirmed candidates from SDSS-II, we select a subset of 108 confirmed SNe Ia with well-observed early-time light curves to search for signatures from shock interaction of the SN with a companion star. No evidence for shock emission is seen; however, the cadence and photometric noise could hide a weak shock signal. We simulate shocked light curves using SN Ia templates and a simple Gaussian shock model to emulate the noise properties of the SDSS-II sample and estimate the detectability of the shock interaction signal as a function of shock amplitude, shock width, and shock fraction. We find no direct evidence for shock interaction in the rest-frame B-band, but place an upper limit on the shock amplitude at 9% of SN peak flux (Mb >-16.6 mag). If the single degenerate channel dominates type Ia progenitors, this result constrains the companion stars to be less than about 6 M ⊙ on the main sequence and strongly disfavors red giant companions.",

author = "Hayden, {Brian T.} and Garnavich, {Peter M.} and Daniel Kasen and Benjamin Dilday and Frieman, {Joshua A.} and Jha, {Saurabh W.} and Hubert Lampeitl and Nichol, {Robert C.} and Masao Sako and Schneider, {Donald P.} and Mathew Smith and Jesper Sollerman and Wheeler, {J. Craig}",

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doi = "10.1088/0004-637X/722/2/1691",

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T1 - Single or double degenerate progenitors? Searching for shock emission in the SDSS-II Type Ia supernovae

AU - Hayden, Brian T.

AU - Garnavich, Peter M.

AU - Kasen, Daniel

AU - Dilday, Benjamin

AU - Frieman, Joshua A.

AU - Jha, Saurabh W.

AU - Lampeitl, Hubert

AU - Nichol, Robert C.

AU - Sako, Masao

AU - Schneider, Donald P.

AU - Smith, Mathew

AU - Sollerman, Jesper

AU - Wheeler, J. Craig

PY - 2010/10/20

Y1 - 2010/10/20

N2 - From the set of nearly 500 spectroscopically confirmed Type Ia supernovae (SNe) and around 10,000 unconfirmed candidates from SDSS-II, we select a subset of 108 confirmed SNe Ia with well-observed early-time light curves to search for signatures from shock interaction of the SN with a companion star. No evidence for shock emission is seen; however, the cadence and photometric noise could hide a weak shock signal. We simulate shocked light curves using SN Ia templates and a simple Gaussian shock model to emulate the noise properties of the SDSS-II sample and estimate the detectability of the shock interaction signal as a function of shock amplitude, shock width, and shock fraction. We find no direct evidence for shock interaction in the rest-frame B-band, but place an upper limit on the shock amplitude at 9% of SN peak flux (Mb >-16.6 mag). If the single degenerate channel dominates type Ia progenitors, this result constrains the companion stars to be less than about 6 M ⊙ on the main sequence and strongly disfavors red giant companions.

AB - From the set of nearly 500 spectroscopically confirmed Type Ia supernovae (SNe) and around 10,000 unconfirmed candidates from SDSS-II, we select a subset of 108 confirmed SNe Ia with well-observed early-time light curves to search for signatures from shock interaction of the SN with a companion star. No evidence for shock emission is seen; however, the cadence and photometric noise could hide a weak shock signal. We simulate shocked light curves using SN Ia templates and a simple Gaussian shock model to emulate the noise properties of the SDSS-II sample and estimate the detectability of the shock interaction signal as a function of shock amplitude, shock width, and shock fraction. We find no direct evidence for shock interaction in the rest-frame B-band, but place an upper limit on the shock amplitude at 9% of SN peak flux (Mb >-16.6 mag). If the single degenerate channel dominates type Ia progenitors, this result constrains the companion stars to be less than about 6 M ⊙ on the main sequence and strongly disfavors red giant companions.

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Single or double degenerate progenitors? Searching for shock emission in the SDSS-II Type Ia supernovae

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