Word: sk
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Dates: during 1980-1989
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...with the supernova. Though Sanduleak was suspected, some astronomers, like Harvard's Robert Kirshner, at first thought that satellite data on the LMC showed the star still existed after the blast and thus could not have been the progenitor. Later other scientists examining the same evidence failed to locate SK-69 202. Admitted Kirshner last week: "It was that star that blew up -- no matter what you've heard elsewhere . . . from me." His colleagues guffawed...
...would Sanduleak, a blue supergiant, a star presumably in mid-life, collapse so violently? According to theory, only aging red supergiants, whose outer gaseous layers had turned from blue to red as they expanded and cooled, spawned this type of supernova. One hypothesis: SK-69 202, like other stars in the LMC, contained relatively little metal, which theorists now think may keep the outer shell of even older stars from expanding fully, thus making it glow blue rather than red as it plunged toward its thermonuclear crisis. Said University of Chicago Astrophysicist David Schramm: "It's clear that while...
Those early characteristics lead Williams to speculate that 1987A "may have had an antecedent star that was not that massive, as supernovas go." By comparing the supernova's position with older photographs of the Large Magellanic Cloud, many astronomers at first identified a hot blue supergiant star, called SK-69 202, as the probable progenitor of 1987A. But that conclusion troubled everyone; theory holds that a star with these characteristics is too young to expire in a final explosion. Two weeks ago, as the initial ultraviolet radiation from the blast began to die down, the astronomers breathed a collective sigh...
Astronomers think 1987A is probably a Type II. But a star called SK 202-69, visible in older photographs in almost exactly the supernova's position and therefore possibly the star that exploded, is a blue supergiant, rather than the red supergiant predicted by theory. Astronomers are still looking for evidence of a previously undetected red supergiant in the same area. "There's a lot of confusion," says Arnett. "We have had so little data on supernovae. We have pieces of the puzzle, but they don't all fit together the same...
...Phoenix-SK Club has filed a proposal with the city to rent its basement space to a record store...