Astronomy and Astrophysics – Astronomy
Scientific paper
May 2001
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001aas...198.4003r&link_type=abstract
American Astronomical Society, 198th AAS Meeting, #40.03; Bulletin of the American Astronomical Society, Vol. 33, p.840
Astronomy and Astrophysics
Astronomy
Scientific paper
We present new observations of the supernova remnant 3C391 in the near-infrared, using the H2 2.12 μ m and [Fe II] 1.64 μ m narrow-band filters in the Prime Focus Infrared Camera on the Palomar Observatory Hale 200'' telescope, and in the mid-infrared, using the circular-variable filters in the ISOCAM on the Infrared Space Observatory. The shocked H2 emission is largely confined to the region 3C391:BML (40'' size), where broad millimeter CO and CS lines had previously been detected. The [Fe II] emission has a significantly different distribution, being brightest in the radio bar and tracing the radio shell. The mid-infrared spectrum reveals bright ionic lines of [Fe II] 5.5 μ m, [Ar II] 6.9 μ m, [Ne II] 12.8 μ m, and [Ne III] 15.5 μ m. There are no aromatic hydrocarbons associated with the shocks, nor is their any mid-infrared continuum, suggesting that macromolecules and very small grains are destroyed in the shocks. The broad-molecular line region 3C391:BML was detected in 5 rotational H2 lines and was imaged at 1.5'' resolution in the near-infrared H2 line. The molecular shocked region resolves into 15 clumps of H2 emission, with no embedded continuum sources. We interpret these clumps as a cluster of pre-stellar cores that are presently being shocked by the supernova blast wave.
Jarrett Thomas H.
Reach William T.
Rho Jeonghee
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