Asphericity in supernova explosions from late-time spectroscopy

Keiichi Maeda; Koji Kawabata; Paolo A. Mazzali; Masaomi Tanaka; Stefano Valenti; Ken'ichi Nomoto; Takashi Hattori; Jinsong Deng; Elena Pian; Stefan Taubenberger; Masanori Iye; Thomas Matheson; Alexei V. Filippenko; Kentaro Aoki; George Kosugi; Youichi Ohyama; Toshiyuki Sasaki; Tadafumi Takata

doi:10.1126/science.1149437

Asphericity in supernova explosions from late-time spectroscopy

Keiichi Maeda, Koji Kawabata, Paolo A. Mazzali, Masaomi Tanaka, Stefano Valenti, Ken'ichi Nomoto, Takashi Hattori, Jinsong Deng, Elena Pian, Stefan Taubenberger, Masanori Iye, Thomas Matheson, Alexei V. Filippenko, Kentaro Aoki, George Kosugi, Youichi Ohyama, Toshiyuki Sasaki, Tadafumi Takata

SCI - Astronomy

Research output: Contribution to journal › Article › peer-review

190 Citations (Scopus)

Abstract

Core-collapse supernovae (CC-SNe) are the explosions that announce the death of massive stars. Some CC-SNe are linked to long-duration gamma-ray bursts (GRBs) and are highly aspherical. One important question is to what extent asphericity is common to all CC-SNe. Here we present late-time spectra for a number of CC-SNe from stripped-envelope stars and use them to explore any asphericity generated in the inner part of the exploding star, near the site of collapse. A range of oxygen emission-line profiles is observed, including a high incidence of double-peaked profiles, a distinct signature of an aspherical explosion. Our results suggest that all CC-SNe from stripped-envelope stars are aspherical explosions and that SNe accompanied by GRBs exhibit the highest degree of asphericity.

Original language	English
Pages (from-to)	1220-1223
Number of pages	4
Journal	Science
Volume	319
Issue number	5867
DOIs	https://doi.org/10.1126/science.1149437
Publication status	Published - 2008 Feb 29

Access to Document

10.1126/science.1149437

Cite this

Maeda, K., Kawabata, K., Mazzali, P. A., Tanaka, M., Valenti, S., Nomoto, K., Hattori, T., Deng, J., Pian, E., Taubenberger, S., Iye, M., Matheson, T., Filippenko, A. V., Aoki, K., Kosugi, G., Ohyama, Y., Sasaki, T., & Takata, T. (2008). Asphericity in supernova explosions from late-time spectroscopy. Science, 319(5867), 1220-1223. https://doi.org/10.1126/science.1149437

@article{3f556c55c5c24151b1c1b6442d04179c,

title = "Asphericity in supernova explosions from late-time spectroscopy",

abstract = "Core-collapse supernovae (CC-SNe) are the explosions that announce the death of massive stars. Some CC-SNe are linked to long-duration gamma-ray bursts (GRBs) and are highly aspherical. One important question is to what extent asphericity is common to all CC-SNe. Here we present late-time spectra for a number of CC-SNe from stripped-envelope stars and use them to explore any asphericity generated in the inner part of the exploding star, near the site of collapse. A range of oxygen emission-line profiles is observed, including a high incidence of double-peaked profiles, a distinct signature of an aspherical explosion. Our results suggest that all CC-SNe from stripped-envelope stars are aspherical explosions and that SNe accompanied by GRBs exhibit the highest degree of asphericity.",

author = "Keiichi Maeda and Koji Kawabata and Mazzali, {Paolo A.} and Masaomi Tanaka and Stefano Valenti and Ken'ichi Nomoto and Takashi Hattori and Jinsong Deng and Elena Pian and Stefan Taubenberger and Masanori Iye and Thomas Matheson and Filippenko, {Alexei V.} and Kentaro Aoki and George Kosugi and Youichi Ohyama and Toshiyuki Sasaki and Tadafumi Takata",

year = "2008",

month = feb,

day = "29",

doi = "10.1126/science.1149437",

language = "English",

volume = "319",

pages = "1220--1223",

journal = "Science",

issn = "0036-8075",

publisher = "American Association for the Advancement of Science",

number = "5867",

}

TY - JOUR

T1 - Asphericity in supernova explosions from late-time spectroscopy

AU - Maeda, Keiichi

AU - Kawabata, Koji

AU - Mazzali, Paolo A.

AU - Tanaka, Masaomi

AU - Valenti, Stefano

AU - Nomoto, Ken'ichi

AU - Hattori, Takashi

AU - Deng, Jinsong

AU - Pian, Elena

AU - Taubenberger, Stefan

AU - Iye, Masanori

AU - Matheson, Thomas

AU - Filippenko, Alexei V.

AU - Aoki, Kentaro

AU - Kosugi, George

AU - Ohyama, Youichi

AU - Sasaki, Toshiyuki

AU - Takata, Tadafumi

PY - 2008/2/29

Y1 - 2008/2/29

N2 - Core-collapse supernovae (CC-SNe) are the explosions that announce the death of massive stars. Some CC-SNe are linked to long-duration gamma-ray bursts (GRBs) and are highly aspherical. One important question is to what extent asphericity is common to all CC-SNe. Here we present late-time spectra for a number of CC-SNe from stripped-envelope stars and use them to explore any asphericity generated in the inner part of the exploding star, near the site of collapse. A range of oxygen emission-line profiles is observed, including a high incidence of double-peaked profiles, a distinct signature of an aspherical explosion. Our results suggest that all CC-SNe from stripped-envelope stars are aspherical explosions and that SNe accompanied by GRBs exhibit the highest degree of asphericity.

AB - Core-collapse supernovae (CC-SNe) are the explosions that announce the death of massive stars. Some CC-SNe are linked to long-duration gamma-ray bursts (GRBs) and are highly aspherical. One important question is to what extent asphericity is common to all CC-SNe. Here we present late-time spectra for a number of CC-SNe from stripped-envelope stars and use them to explore any asphericity generated in the inner part of the exploding star, near the site of collapse. A range of oxygen emission-line profiles is observed, including a high incidence of double-peaked profiles, a distinct signature of an aspherical explosion. Our results suggest that all CC-SNe from stripped-envelope stars are aspherical explosions and that SNe accompanied by GRBs exhibit the highest degree of asphericity.

UR - http://www.scopus.com/inward/record.url?scp=40049096786&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=40049096786&partnerID=8YFLogxK

U2 - 10.1126/science.1149437

DO - 10.1126/science.1149437

M3 - Article

AN - SCOPUS:40049096786

SN - 0036-8075

VL - 319

SP - 1220

EP - 1223

JO - Science

JF - Science

IS - 5867

ER -

Asphericity in supernova explosions from late-time spectroscopy

Abstract

Access to Document

Other files and links

Fingerprint

Cite this