Science Olympiad Astronomy 2017 DSO List – Flashcards
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J075141 and J174140
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White dwarf binaries; the first known AM CVn progenitor systems; lopsided and produce gravitational waves
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NGC 2392
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PN with clumpy streaks; unsually strong x-ray emission hints at companion to central star. Also known as Eskimo Nebula, Clownface Nebula, or Caldwell 39.
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SNR 0509-67.5
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Ia remnant in the LMC; 400-year "light echo"
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Omicron Ceti
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Variable AGB red giant exchanging mass with white dwarf companion; first discovered non-supernova variable; model for Mira variable type stars. Also known as Mira.
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SN 2011fe
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Youngest type Ia ever discovered (while near beginning of SN event)
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G1.9+0.3
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Youngest known SNR in Milky Way Galaxy; type Ia
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NGC 2440
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Extremely bright PN, with central star possibly being the hottest known white dwarf
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Henize 2-248
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PN with binary white dwarf core; first discovered Ia merger candidate
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Henize 3-1357
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Youngest known PN; comparatively small. Also known as the Stingray Nebula.
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Tycho's SNR
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Ia visible to the eye in historical records. Also known as SN 1572.
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SS Cygni
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Brightest dwarf nova; often classified as a U Geminorum type
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M15
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Very old globular cluster; very compact and has undergone core collapse
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HM Cancri
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White dwarf binary; shortest known orbital period of any binary; may be one of the strongest gravitational wave sources in Milky Way Galaxy. Also known as RX J0806.3+1527.
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Sirius
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Known since antiquity and was the first star to have its velocity measured; red controversy; unexpectedly high IR levels may indicate dust
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NGC 1846
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Globular cluster that for some reason seems to contain a PN; could be explained by multiple stellar populations in the same cluster
