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机译:A hidden population of massive stars with circumstellar shells discovered with the Spitzer space telescope
Spitzer Science Center, California Institute of Technology, MS 220-6, Pasadena, CA 91125, United States;
Department of Terrestrial Magnetism, Carnegie Institution of Washington, 5241 Broad Branch Road NW, Washington, DC 20015, United States;
NASA Herschel Science Center, California Institute of Technology, Pasadena, CA 91125, United States;
Circumstellar matter; ISM: bubbles; Stars: early-type; Stars: emission-line; Be; Stars: mass-loss; Stars: WolfRayet;