Interaction of the Supernova Remnant HB3 with the Ambient Interstellar Gas

Details Interaction of the Supernova Remnant HB3 with the Ambient Interstellar Gas Interaction of the Supernova Remnant HB3 with the Ambient Interstellar Gas

Mar 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005astl...31..179g&link_type=abstract

Astronomy Letters, vol. 31, Issue 3, p.179-185

Astronomy and Astrophysics

Astronomy

1

Interstellar Medium - Gaseous Nebulae - Neutral Hydrogen - Supernovae And Supernova Remnants

Scientific paper

The well-known shell supernova remnant (SNR) HB3 is part of a feature-rich star-forming region together with the nebulae W3, W4, and W5. We study the HI structure around this SNR using five RATAN-600 drift curves obtained at a wavelength of 21 cm with an angular resolution of 2′ in one coordinate over the radial-velocity range -183 to +60 km s-1 in a wider region of the sky and with a higher sensitivity than in previous works by other authors. The spatial-kinematic distribution of HI features around the SNR clearly shows two concentric expanding shells of gas that surround the SNR and coincide with it in all three coordinates (α, δ, and V). The outer shell has a radius of 133 pc, a thickness of 24 pc, and an expansion velocity of 48 km s-1. The mass of the gas in it is ≈2.3 × 105 M &sun;. For the inner shell, these parameters are 78 pc, 36 pc, 24 km s- 1, and 0.9 × 105 M &sun;, respectively. The inner shell is immediately adjacent to the SNR. Assuming that the outer shell was produced by the stellar wind and the inner shell arose from the shock wave of the SNR proper, we estimated the age of the outer shell, ≈1.7 × 106 yr, and the mechanical luminosity of the stellar wind, 1.5 × 1038 erg s-1. The inner shell has an age of ≈106 yr and corresponds to a total supernova explosion energy of ≈1052 erg.

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