New upper limit on intensity of forbidden Fe XIV 5303 in Tycho's supernova remnant

Astronomy and Astrophysics – Astrophysics

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Charge Coupled Devices, Emission Spectra, Iron, Supernova Remnants, Light Curve, Stellar Mass Ejection, White Dwarf Stars

Scientific paper

Analysis of a CCD image of the remnant of Tycho's supernova made in the forbidden coronal green line fails to reveal emission at a limit of 3.1 x 10 to the -8th ergs/sq cm s sr at the location of the reverse shock into the ejecta. The nondetection may imply that the reverse shock has not yet reached Fe-enriched ejecta or that the known clumpiness of the ejecta prevents production of observable amounts of Fe(+13).

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