A forbidden Ne III image of the Cassiopeia A supernova remnant

Journal Article · Fri Jun 01 04:00:00 EDT 1990 · Astronomical Journal; (USA)

DOI:https://doi.org/10.1086/115470· OSTI ID:6644445

Fesen, R A ^[1]

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1. Dartmouth College, Hanover, NH (USA)

Neon emission has not been detected in the Cas A remnant since Minkowski (1957) reported finding Ne III 3869 forbidden line emission in one of Cas A's knots. A CCD image of Cas A is presented taken through a narrow passband filter centered near the Ne III 3869 forbidden line which shows that while forbidden Ne III emission is neither bright nor widespread in Cas A, a few potentially Ne-rich filaments appear indeed to be present. These include the NW edge of the remnant's very bright Filament 1, two bright northern rim emission knots, and two small and otherwise unremarkable north central knots. These candidate Ne-rich ejecta knots may finally help resolve Cas A's neon abundance. 19 refs.

• OSTI ID: 6644445
• Journal Information: Astronomical Journal; (USA), Journal Name: Astronomical Journal; (USA) Vol. 99; ISSN 0004-6256; ISSN ANJOA
• Country of Publication: United States
• Language: English

Related Subjects

640102* -- Astrophysics & Cosmology-- Stars & Quasi-Stellar
Radio & X-Ray Sources
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ABUNDANCE
CHARGE-COUPLED DEVICES
CHEMICAL COMPOSITION
COSMIC RADIO SOURCES
ELEMENT ABUNDANCE
ELEMENTS
EMISSION SPECTRA
ENERGY-LEVEL TRANSITIONS
FLUIDS
FORBIDDEN TRANSITIONS
GASES
MORPHOLOGY
NEON
NONMETALS
RARE GASES
SEMICONDUCTOR DEVICES
SPECTRA
SUPERNOVA REMNANTS