Nebular Models of Sub-Chandrasekhar Mass Type Ia Supernovae: Clues to the Origin of Ca-rich Transients
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In this article, the authors use non-local thermal equilibrium radiative transport modeling to examine observational signatures of sub-Chandrasekhar mass double detonation explosions in the nebular phase.Abstract:
We use non-local thermal equilibrium radiative transport modeling to examine observational signatures of sub-Chandrasekhar mass double detonation explosions in the nebular phase. Results range from spectra that look like typical and subluminous Type Ia supernovae (SNe) for higher mass progenitors to spectra that look like Ca-rich transients for lower mass progenitors. This ignition mechanism produces an inherent relationship between emission features and the progenitor mass as the ratio of the nebular [Ca II]/[Fe III] emission lines increases with decreasing white dwarf mass. Examining the [Ca II]/[Fe III] nebular line ratio in a sample of observed SNe we find further evidence for the two distinct classes of SNe Ia identified in Polin et al. by their relationship between Si II velocity and B-band magnitude, both at time of peak brightness. This suggests that SNe Ia arise from more than one progenitor channel, and provides an empirical method for classifying events based on their physical origin. Furthermore, we provide insight to the mysterious origin of Ca-rich transients. Low-mass double detonation models with only a small mass fraction of Ca (1%) produce nebular spectra that cool primarily through forbidden [Ca II] emission.read more
Citations
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The Zwicky Transient Facility Census of the Local Universe I: Systematic search for Calcium rich gap transients reveal three related spectroscopic sub-classes
Kaushik De,Mansi M. Kasliwal,Anastasios Tzanidakis,U. Christoffer Fremling,Scott M. Adams,Igor Andreoni,Ashot Bagdasaryan,Eric C. Bellm,Lars Bildsten,Chris Cannella,David O. Cook,Alexandre Delacroix,Andrew J. Drake,Dmitry A. Duev,Alison Dugas,Sara Frederick,Avishay Gal-Yam,Daniel A. Goldstein,V. Zach Golkhou,Matthew J. Graham,David Hale,M. Hankins,George Helou,Anna Y. Q. Ho,I. Irani,Jacob Jencson,Stephen Kaye,Shrinivas R. Kulkarni,Thomas Kupfer,Russ R. Laher,Robin Leadbeater,Ragnhild Lunnan,Frank J. Masci,Adam A. Miller,James D. Neill,Eran O. Ofek,Daniel A. Perley,Abigail Polin,Thomas A. Prince,Eliot Quataert,Daniel J. Reiley,Reed Riddle,Ben Rusholme,Yashvi Sharma,David L. Shupe,Jesper Sollerman,Leonardo Tartaglia,Richard Walters,Lin Yan,Yuhan Yao +49 more
TL;DR: In this paper, the authors used the Zwicky Transient Facility alert stream (ZTF) to detect Calcium-rich gap transients in the Census of the Local Universe (CLU) catalog.
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SN 2019ehk: A Double-peaked Ca-rich Transient with Luminous X-Ray Emission and Shock-ionized Spectral Features
Wynn V. Jacobson-Galán,Wynn V. Jacobson-Galán,Raffaella Margutti,Charles D. Kilpatrick,Daichi Hiramatsu,Daichi Hiramatsu,Hagai B. Perets,David K. Khatami,Ryan J. Foley,John C. Raymond,Sung-Chul Yoon,Alexey Bobrick,Yossef Zenati,Lluís Galbany,Jennifer E. Andrews,Peter de Nully Brown,Régis Cartier,Deanne L. Coppejans,Georgios Dimitriadis,Matthew Dobson,A. Hajela,D. Andrew Howell,D. Andrew Howell,Hanindyo Kuncarayakti,Dan Milisavljevic,Mohammed Rahman,César Rojas-Bravo,David J. Sand,Joel Shepherd,Stephen J. Smartt,Holland Stacey,Michael D. Stroh,Jonathan J. Swift,Giacomo Terreran,Jozsef Vinko,Jozsef Vinko,Xiaofeng Wang,Xiaofeng Wang,Joseph P. Anderson,E. Baron,Edo Berger,Peter K. Blanchard,Jamison Burke,Jamison Burke,David A. Coulter,David A. Coulter,Lindsay DeMarchi,James M. DerKacy,Christoffer Fremling,Sebastian Gomez,Mariusz Gromadzki,Griffin Hosseinzadeh,Daniel Kasen,Daniel Kasen,Levente Kriskovics,Levente Kriskovics,Curtis McCully,Curtis McCully,T. E. Müller-Bravo,Matt Nicholl,Matt Nicholl,A. Ordasi,C. Pellegrino,C. Pellegrino,Anthony L. Piro,András Pál,András Pál,Juanjuan Ren,Armin Rest,Armin Rest,R. Michael Rich,Hanna Sai,Krisztián Sárneczky,Ken J. Shen,P. Short,Matthew R. Siebert,Candice Stauffer,Róbert Szakáts,X. Zhang,Jujia Zhang,Kaicheng Zhang +80 more
TL;DR: In this article, panchromatic observations and modeling of the Calcium-rich supernova 2019ehk in the star-forming galaxy M100 (d ≈ 16.2 Mpc) starting 10 hr after explosion and continuing for ~300 days.
Journal ArticleDOI
The Spectacular Ultraviolet Flash From the Peculiar Type Ia Supernova 2019yvq
A. A. Miller,M. R. Magee,Abigail Polin,K. Maguire,E. Zimmerman,Yuhan Yao,Jesper Sollerman,Steve Schulze,Daniel A. Perley,M. Kromer,Mattia Bulla,Igor Andreoni,Eric C. Bellm,Kaushik De,Richard G. Dekany,Alexandre Delacroix,S. Dhawan,Christoffer Fremling,Avishay Gal-Yam,David Goldstein,V. Z. Golkhou,Ariel Goobar,Matthew J. Graham,I. Irani,M. M. Kasliwal,Stephen Kaye,Y.-L. Kim,R. R. Laher,A. A. Mahabal,Frank J. Masci,P. E. Nugent,Eran O. Ofek,E. S. Phinney,S. J. Prentice,Reed Riddle,M. Rigault,B. Rusholme,Tassilo Schweyer,David L. Shupe,Maayane T. Soumagnac,Giacomo Terreran,Robert J. Walters,Lin Yan,J. Zolkower,Shrinivas R. Kulkarni +44 more
TL;DR: In this paper, the second observed SN$\,$2019yvq, after iPTF$,$14atg, displays an early flash of emission in the ultraviolet (UV) and optical.
Journal ArticleDOI
ZTF Early Observations of Type Ia Supernovae III: Early-Time Colors as a Test for Explosion Models and Multiple Populations.
Mattia Bulla,Mattia Bulla,Adam A. Miller,Adam A. Miller,Yuhan Yao,Luc Dessart,Suhail Dhawan,S. Papadogiannakis,Rahul Biswas,Ariel Goobar,Shrinivas R. Kulkarni,Jakob Nordin,Peter Nugent,Peter Nugent,Abigail Polin,Abigail Polin,Jesper Sollerman,Eric C. Bellm,Michael W. Coughlin,Richard Dekany,V. Zach Golkhou,Matthew J. Graham,Mansi M. Kasliwal,Thomas Kupfer,Russ R. Laher,Frank J. Masci,Michael Porter,Ben Rusholme,David L. Shupe +28 more
TL;DR: In this paper, the colors of 65 Type Ia supernovae discovered within 5 days from first light by the Zwicky Transient Facility in 2018, a sample that is about three times larger than that in the literature.
Journal ArticleDOI
Supernovae Ia in 2019 (review): a rising demand for spherical explosions
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