Science Olympiad – Astronomy Deep Sky Objects Image Set – Flashcards
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J075141/J174140
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Two white dwarf stars that are approaching AM-CVn style collision; theorized reactions include coalescence into a larger white dwarf or neutron star, as well as a type IA supernova event
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NGC 2392
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The Eskimo Nebula; strangely symmetrical planetary nebula, proposed as a result of a companion star/binary system
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SNR 0509-67.5
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Type IA supernova remnant, young remnant(400 yo) expanding rather quickly (11,000,000 mph)
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Omicron Ceti
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Red giant variable star that is part of a binary system with a white dwarf, where mass transfer is taking place, and will eventually cause a type IA supernova event
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SN 2011fe
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Extremely far away; type IA supernova event, that demonstrates the principles of these events
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SNR G1.9+0.3
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Youngest type IA in the Milky Way, taking place just over 100 years ago
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NGC 2440
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Hottest known white dwarf stellar core, surrounded by a complex planetary nebula
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Henize 2-248
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Planetary nebula surrounding a binary system of white dwarves, which exceed Sekhar's limit, and will ultimately result in a type IA supernova event
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Henize 3-1357 (Stingray Nebula)
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Youngest planetary nebula on record; structural features and symmetry thought to be a result of a companion star nearby
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Tycho's SNR
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A recent event observed several times, that gives new information relevant to type IA supernova events; result of thermonuclear explosion from mass accretion
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SS Cygni
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A dwarf nova system with a red and white dwarf; dwarf nova instability takes place in the accretion disk and results in repeated flares (fairly periodically in light curve)
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Messier 15 (M15)
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About 35000 light years away; a globular cluster containing about 100,000 stars, showing the stellar evolution of young stars within such structures
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HM Cancri
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Binary system extremely close with remarkably fast orbit (five minutes), as they approach one another, coalescing into a white dwarf or neutron star
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Sirius A/B
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A binary system of a larger main sequence star and white dwarf companion
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NGC 1846
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Another globular cluster within the Milky Way; exemplifying the diversity of stars within globular clusters, and showing metallicity differences in populations
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Type IA Supernova
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An event in which a binary system including a white dwarf makes contact, allowing for mass transfer to the white dwarf; As this approaches a critical mass, the star releases a violent outburst of mass and energy
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AM CVn Systems
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Fast-orbiting, hot and dense binary systems that may produce gravitational waves, and will eventually merge into a white dwarf, neutron star, or IA supernova event
