Ca hnk: The Calcium-rich Transient Supernova 2016hnk from a Helium Shell Detonation of a Sub-Chandrasekhar White Dwarf

Physics

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https://doi.org/10.3847/1538-4357/ab94b8
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Ca hnk: The Calcium-rich Transient Supernova 2016hnk from a Helium Shell Detonation of a Sub-Chandrasekhar White Dwarf. / Jacobson-Galán, Wynn V.; Polin, Abigail; Foley, Ryan J. et al.
In: The Astrophysical Journal, Vol. 896, No. 2, 165, 25.06.2020.

Research output: Contribution to Journal/Magazine › Journal article › peer-review

Harvard

Jacobson-Galán, WV, Polin, A, Foley, RJ, Dimitriadis, G, Kilpatrick, CD, Margutti, R, Coulter, DA, Jha, SW, Jones, DO, Kirshner, RP, Pan, Y-C, Piro, AL, Rest, A & Rojas-Bravo, C 2020, 'Ca hnk: The Calcium-rich Transient Supernova 2016hnk from a Helium Shell Detonation of a Sub-Chandrasekhar White Dwarf', The Astrophysical Journal, vol. 896, no. 2, 165. https://doi.org/10.3847/1538-4357/ab94b8

APA

Jacobson-Galán, W. V., Polin, A., Foley, R. J., Dimitriadis, G., Kilpatrick, C. D., Margutti, R., Coulter, D. A., Jha, S. W., Jones, D. O., Kirshner, R. P., Pan, Y.-C., Piro, A. L., Rest, A., & Rojas-Bravo, C. (2020). Ca hnk: The Calcium-rich Transient Supernova 2016hnk from a Helium Shell Detonation of a Sub-Chandrasekhar White Dwarf. The Astrophysical Journal, 896(2), Article 165. https://doi.org/10.3847/1538-4357/ab94b8

Vancouver

Jacobson-Galán WV, Polin A, Foley RJ, Dimitriadis G, Kilpatrick CD, Margutti R et al. Ca hnk: The Calcium-rich Transient Supernova 2016hnk from a Helium Shell Detonation of a Sub-Chandrasekhar White Dwarf. The Astrophysical Journal. 2020 Jun 25;896(2):165. doi: 10.3847/1538-4357/ab94b8

Author

Jacobson-Galán, Wynn V. ; Polin, Abigail ; Foley, Ryan J. et al. / Ca hnk: The Calcium-rich Transient Supernova 2016hnk from a Helium Shell Detonation of a Sub-Chandrasekhar White Dwarf. In: The Astrophysical Journal. 2020 ; Vol. 896, No. 2.

Bibtex

@article{d9a4135abba5416287ade31cb036440a,

title = "Ca hnk: The Calcium-rich Transient Supernova 2016hnk from a Helium Shell Detonation of a Sub-Chandrasekhar White Dwarf",

abstract = "We present observations and modeling of SN 2016hnk, a Ca-rich supernova (SN) that is consistent with being the result of a He-shell double-detonation explosion of a C/O white dwarf. We find that SN 2016hnk is intrinsically red relative to typical thermonuclear SNe and has a relatively low peak luminosity ( M B = -15.4 mag), setting it apart from low-luminosity SNe Ia. SN 2016hnk has a fast-rising light curve that is consistent with other Ca-rich transients (t r = 15 days). We determine that SN 2016hnk produced 0.03 ± 0.01 M o˙ of 56Ni and 0.9 ± 0.3 M o˙ of ejecta. The photospheric spectra show strong, high-velocity Ca ii absorption and significant line blanketing at λ < 5000 {\AA}, making it distinct from typical (SN 2005E-like) Ca-rich SNe. SN 2016hnk is remarkably similar to SN 2018byg, which was modeled as a He-shell double-detonation explosion. We demonstrate that the spectra and light curves of SN 2016hnk are well modeled by the detonation of a 0.02 M⊙ helium shell on the surface of a 0.85 M⊙ C/O white dwarf. This analysis highlights the second observed case of a He-shell double-detonation and suggests a specific thermonuclear explosion that is physically distinct from SNe that are defined simply by their low luminosities and strong [Ca ii] emission.",

author = "Jacobson-Gal{\'a}n, {Wynn V.} and Abigail Polin and Foley, {Ryan J.} and Georgios Dimitriadis and Kilpatrick, {Charles D.} and Raffaella Margutti and Coulter, {David A.} and Jha, {Saurabh W.} and Jones, {David O.} and Kirshner, {Robert P.} and Yen-Chen Pan and Piro, {Anthony L.} and Armin Rest and C{\'e}sar Rojas-Bravo",

year = "2020",

month = jun,

day = "25",

doi = "10.3847/1538-4357/ab94b8",

language = "English",

volume = "896",

journal = "The Astrophysical Journal",

issn = "0004-637X",

publisher = "Institute of Physics Publishing",

number = "2",

}

RIS

TY - JOUR

T1 - Ca hnk: The Calcium-rich Transient Supernova 2016hnk from a Helium Shell Detonation of a Sub-Chandrasekhar White Dwarf

AU - Jacobson-Galán, Wynn V.

AU - Polin, Abigail

AU - Foley, Ryan J.

AU - Dimitriadis, Georgios

AU - Kilpatrick, Charles D.

AU - Margutti, Raffaella

AU - Coulter, David A.

AU - Jha, Saurabh W.

AU - Jones, David O.

AU - Kirshner, Robert P.

AU - Pan, Yen-Chen

AU - Piro, Anthony L.

AU - Rest, Armin

AU - Rojas-Bravo, César

PY - 2020/6/25

Y1 - 2020/6/25

N2 - We present observations and modeling of SN 2016hnk, a Ca-rich supernova (SN) that is consistent with being the result of a He-shell double-detonation explosion of a C/O white dwarf. We find that SN 2016hnk is intrinsically red relative to typical thermonuclear SNe and has a relatively low peak luminosity ( M B = -15.4 mag), setting it apart from low-luminosity SNe Ia. SN 2016hnk has a fast-rising light curve that is consistent with other Ca-rich transients (t r = 15 days). We determine that SN 2016hnk produced 0.03 ± 0.01 M o˙ of 56Ni and 0.9 ± 0.3 M o˙ of ejecta. The photospheric spectra show strong, high-velocity Ca ii absorption and significant line blanketing at λ < 5000 Å, making it distinct from typical (SN 2005E-like) Ca-rich SNe. SN 2016hnk is remarkably similar to SN 2018byg, which was modeled as a He-shell double-detonation explosion. We demonstrate that the spectra and light curves of SN 2016hnk are well modeled by the detonation of a 0.02 M⊙ helium shell on the surface of a 0.85 M⊙ C/O white dwarf. This analysis highlights the second observed case of a He-shell double-detonation and suggests a specific thermonuclear explosion that is physically distinct from SNe that are defined simply by their low luminosities and strong [Ca ii] emission.

AB - We present observations and modeling of SN 2016hnk, a Ca-rich supernova (SN) that is consistent with being the result of a He-shell double-detonation explosion of a C/O white dwarf. We find that SN 2016hnk is intrinsically red relative to typical thermonuclear SNe and has a relatively low peak luminosity ( M B = -15.4 mag), setting it apart from low-luminosity SNe Ia. SN 2016hnk has a fast-rising light curve that is consistent with other Ca-rich transients (t r = 15 days). We determine that SN 2016hnk produced 0.03 ± 0.01 M o˙ of 56Ni and 0.9 ± 0.3 M o˙ of ejecta. The photospheric spectra show strong, high-velocity Ca ii absorption and significant line blanketing at λ < 5000 Å, making it distinct from typical (SN 2005E-like) Ca-rich SNe. SN 2016hnk is remarkably similar to SN 2018byg, which was modeled as a He-shell double-detonation explosion. We demonstrate that the spectra and light curves of SN 2016hnk are well modeled by the detonation of a 0.02 M⊙ helium shell on the surface of a 0.85 M⊙ C/O white dwarf. This analysis highlights the second observed case of a He-shell double-detonation and suggests a specific thermonuclear explosion that is physically distinct from SNe that are defined simply by their low luminosities and strong [Ca ii] emission.

UR - https://doi.org/10.3847/1538-4357/ab94b8

U2 - 10.3847/1538-4357/ab94b8

DO - 10.3847/1538-4357/ab94b8

M3 - Journal article

VL - 896

JO - The Astrophysical Journal

JF - The Astrophysical Journal

SN - 0004-637X

IS - 2

M1 - 165

ER -

Research

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