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Studies of the Properties of Blue Stragglers

Studies of the Properties of Blue Stragglers. Liu Guoqing 2006.04.14. Outline. Motivation The progress and results of my work Future steps of my work. Motivation. Bluer and more luminous than MS turnoff. Working sample: Blue stragglers in M67.

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Studies of the Properties of Blue Stragglers

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  1. Studies of the Properties of Blue Stragglers Liu Guoqing 2006.04.14

  2. Outline • Motivation • The progress and results of my work • Future steps of my work

  3. Motivation • Bluer and more luminous than MS turnoff

  4. 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:250μ 3900~7000A Resolution:6.4A R=2500 gain:1.85 noise:3.7 • All the reduction has been finished with IRAF (July) ccdproc zerocombine flatcombine response imcombine cosmicrays apall identify sensfunc calibrate

  5. 9.38 0.045

  6. Fundamental quantities:(1) Lick indices

  7. Another way to calibrate

  8. Fundamental quantities: (2) spectral fitting 8790

  9. Future steps of my work • Derive 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

  10. Thank you !

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