Studies of the Properties of Blue Stragglers
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Transcript of Studies of the Properties of Blue Stragglers
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Studies of the Properties of Blue Stragglers
Liu Guoqing
2006.04.14
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Outline
MotivationThe progress and results of my workFuture steps of my work
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MotivationBluer and more luminous than MS turnoff
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Working sample: Blue stragglers in M67 Data from the 2.12-m Guillermo Haro Telescope, at Cananea, Mexico (May 25) Boller & Chivens spectrograph Cassegrain focus grating:150l/mm slit:250 3900~7000A Resolution:6.4A R=2500 gain:1.85 noise:3.7All the reduction has been finished with IRAF (July) ccdproc zerocombine flatcombine response imcombine cosmicrays apall identify sensfunc calibrate
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9.38 0.045
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Fundamental quantities:(1) Lick indices
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Another way to calibrate
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Fundamental quantities: (2) spectral fitting8790
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Future steps of my workDerive the basic parameters of blue stragglers by Lick indices Analysis the intrinsic properties of blue stragglers Analysis the possible formation ways of blue stragglers Analysis the environment of stellar system
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Thank you !