KINEMATICS of ULTRA-HIGH-VELOCITY GAS in the EXPANDING MOLECULAR SHELL ADJACENT to the W44 SUPERNOVA REMNANT

Masaya Yamada, Tomoharu Oka, Shunya Takekawa, Yuhei Iwata, Shiho Tsujimoto, Sekito Tokuyama, Maiko Furusawa, Keisuke Tanabe, Mariko Nomura

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7 Citations (Scopus)

Abstract

We mapped the ultra-high-velocity feature (the "Bullet") detected in the expanding molecular shell associated with the W44 supernova remnant using the Nobeyama Radio Observatory 45 m telescope and the Atacama Submillimeter Telescope Experiment 10 m telescope. The Bullet clearly appears in the CO J = 1-0, CO J = 3-2, CO J = 4-3, and HCO+ J = 1-0 maps with a compact appearance (0.5 × 0.8 pc2) and an extremely broad-velocity width (ΔV ≃ 100 km s-1). The line intensities indicate that the Bullet has a higher density and temperature than those in the expanding molecular shell. The kinetic energy of the Bullet amounts to 1048.0 erg, which is approximately 1.5 orders of magnitude greater than the kinetic energy shared to the small solid angle of it. Two possible formation scenarios with an inactive isolated black hole are presented.

Original languageEnglish
Article numberL3
JournalAstrophysical Journal Letters
Volume834
Issue number1
DOIs
Publication statusPublished - 2017 Jan 1

Keywords

  • ISM: clouds
  • ISM: kinematics and dynamics
  • ISM: molecules
  • ISM: supernova remnants

ASJC Scopus subject areas

  • Astronomy and Astrophysics
  • Space and Planetary Science

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    Yamada, M., Oka, T., Takekawa, S., Iwata, Y., Tsujimoto, S., Tokuyama, S., Furusawa, M., Tanabe, K., & Nomura, M. (2017). KINEMATICS of ULTRA-HIGH-VELOCITY GAS in the EXPANDING MOLECULAR SHELL ADJACENT to the W44 SUPERNOVA REMNANT. Astrophysical Journal Letters, 834(1), [L3]. https://doi.org/10.3847/2041-8213/834/1/L3