Spitzer Observations of the Young Core-collapse Supernova Remnant 1E0102.2-72.3: Infrared Ejecta Emission and Dust Formation

Details Spitzer Observations of the Young Core-collapse Supernova Remnant 1E0102.2-72.3: Infrared Ejecta Emission and Dust Formation Spitzer Observations of the Young Core-collapse Supernova Remnant 1E0102.2-72.3: Infrared Ejecta Emission and Dust Formation

May 2009

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009aas...21440201r&link_type=abstract

American Astronomical Society, AAS Meeting #214, #402.01; Bulletin of the American Astronomical Society, Vol. 41, p.662

Astronomy and Astrophysics

Astronomy

Scientific paper

We present Spitzer IRS and IRAC observations of the young supernova remnant E0102 (SNR 1E0102.2-7219) in the SMC. The infrared spectra show strong lines of Ne and O, with the [Ne II] line at 12.8 micron having a large velocity dispersion of 2,000-4,500 km/s indicative of fast-moving ejecta. Unlike the young Galactic SNR Cas A, E0102 lacks emission from Ar and Fe. Diagnostics of the [Ne III] line pairs imply that [Ne III] emitting ejecta have a low density of 650 K, while [Ne V] line pairs imply that the infrared [Ne V] emitting ejecta have a high density of 104 cm-3. We have calculated radiative shock models for various velocity ranges including the effects of photoionization. The shock model indicates that the [Ne V] lines come mainly from the cooling zone, which is hot and dense, whereas [Ne II] and [Ne III] come mainly from the photoinization zone, which has a low temperature of 400 - 1000 K. We estimate an infrared emitting Ne ejecta mass of 0.04 Msun from the infrared observations, and discuss implications for the progenitor mass. The spectra also have a dust continuum feature peaking at 18 micron that coincides spatially with the ejecta, providing clear evidence that dust formed in the expanding ejecta. The 18 micron-peak dust feature is fitted by a mixture of MgSiO3 and Si dust grains, while the rest of the continuum requires either carbon or Al2O3 grains. We measure the total dust mass formed within the ejecta of E0102 to be in the range of 0.007 to 0.015 Msun. The dust mass in E0102 is thus a factor of a few smaller than that in Cas A. The composition of the dust is also different, showing relatively less silicate and no Fe-bearing dust, as is suggested by the absence of Fe-emitting ejecta.

Affiliated with

Also associated with

No associations

Rating

Spitzer Observations of the Young Core-collapse Supernova Remnant 1E0102.2-72.3: Infrared Ejecta Emission and Dust Formation does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Spitzer Observations of the Young Core-collapse Supernova Remnant 1E0102.2-72.3: Infrared Ejecta Emission and Dust Formation, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Spitzer Observations of the Young Core-collapse Supernova Remnant 1E0102.2-72.3: Infrared Ejecta Emission and Dust Formation will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1106453