Is there a mildly relativistic jet in SN2007gr?

Z. Paragi, A. J. Van Der Horst, M. Tanaka, G. B. Taylor, C. Kouveliotou, J. Granot, E. Ramirez-Ruiz, Y. Pidopryhora, S. Bourke, R. M. Campbell, M. A. Garrett, H. J. Van Langevelde

研究成果: Conference contribution

抄録

SN2007gr was an ordinary type Ic supernova, with a hint of asymmetric explosion seen in the optical polarization spectrum. This type of SNe is occasionally associated with long duration gamma-ray bursts which generate ultra-relativistic jets; no relativistic outflows have yet been found by direct imaging in SNe Ib/c explosions. High resolution very long baseline interferometry (VLBI) data and simultaneous total radio flux density measurements indicated that SN2007gr has expanded mildly relativistically. We performed late time Westerbork Synthesis Radio Telescope (WSRT) observations to measure the level of the underlying extended emission. Comparison of the VLBI and the background-subtracted WSRT and independent VLA data indicate an at least partially resolved source with an average expansion velocity of ≥0.4c, although the VLBI data could be consistent with a fainter source with an expansion velocity of ∼0.2c as well.

本文言語English
ホスト出版物のタイトルJets at all Scales
編集者Gustavo Romero, Rashid Sunyaev, Rashid Sunyaev, Tomaso Belloni
ページ319-320
ページ数2
S275
DOI
出版ステータスPublished - 2010 9
外部発表はい

出版物シリーズ

名前Proceedings of the International Astronomical Union
番号S275
6
ISSN(印刷版)1743-9213
ISSN(電子版)1743-9221

ASJC Scopus subject areas

  • 医学(その他)
  • 天文学と天体物理学
  • 栄養および糖尿病
  • 公衆衛生学、環境および労働衛生
  • 宇宙惑星科学

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