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Stars and Their Evolution: as viewed by ALMA

Stars and Their Evolution: as viewed by ALMA. Margaret Meixner STScI. ALMA puts normal stellar astronomy on radio astronomy’s map. The Sun: Quiet component: Chromosphere Solar Activity: Solar flares => microwave bursts (De Silva, White et al. w/ BIMA).

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Stars and Their Evolution: as viewed by ALMA

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  1. Stars and Their Evolution:as viewed by ALMA Margaret Meixner STScI ALMA Workshop UMD Margaret Meixner (STScI)

  2. ALMA puts normal stellar astronomy on radio astronomy’s map. ALMA Workshop UMD Margaret Meixner (STScI)

  3. The Sun: Quiet component: Chromosphere Solar Activity: Solar flares => microwave bursts (De Silva, White et al. w/ BIMA) NRO - Japan: Microwave Image of Sun’s Chromosphere ALMA Workshop UMD Margaret Meixner (STScI)

  4. Main Sequence Stars • Detect photospheric emission from over 600 stars => dramatic improvement of absolute flux calibration • Stellar astrometry • Stellar activity: chromospheres, flares (e.g. M dwarfs), evolution of. • Massive star winds ALMA Workshop UMD Margaret Meixner (STScI)

  5. ALMA extends evolved star research to higher resolutions, fainter sources and lines… ALMA Workshop UMD Margaret Meixner (STScI)

  6. IRC+10216: Arcs in CO Fong, Meixner Shah 2003 ALMA Workshop UMD Margaret Meixner (STScI)

  7. Egg Nebula / AFGL 2688 Fong, Meixner et al. 2004 ALMA Workshop UMD Margaret Meixner (STScI)

  8. NGC 7027 BIMA: Fong et al. 2004 WIYN/NIRIM H , [FeII], Brg 2 ALMA Workshop UMD Margaret Meixner (STScI)

  9. Red Rectangle + + + + + + ALMA Workshop UMD Margaret Meixner (STScI) Doering, Meixner, Fong et al. 2004

  10. Three kinematic signatures • Simple expansion: IRC+10216, IRAS 22272+5435, HD179821, HD 161796, HD 56126, IRAS 21282+5050, OH 26.5+4.2 • Expansion + collimated outflows: AFGL 2688, NGC 7027, AFGL 618 • Expansion + rotation: Mira, 89 Her, Red Rectangle ALMA Workshop UMD Margaret Meixner (STScI)

  11. ALMA Workshop UMD Margaret Meixner (STScI)

  12. Evolved Intermediate Mass Stars with ALMA • Dust formation and circumstellar chemistry via detailed studies of nearby sources • Mass loss return to ISM via surveys of galactic plane AGBs (GLIMPSE w/ Spitzer) • C/O ratios & isotopic studies • Sub-arcsecond imaging of Spitzer detected circumstellar dust shells. • And….. ALMA Workshop UMD Margaret Meixner (STScI)

  13. ALMA: Magellanic Clouds SMC: 0.01-0.2 x solar LMC: 0.1-0.5 xsolar Lower metallicity => lower dust content -studies of molecular outflows in known evolved Stars studied by Spitzer,… ALMA Workshop UMD Margaret Meixner (STScI) (APOD)

  14. ALMA will track the evolution of massive stars from the main sequence to their spectacular deaths. ALMA Workshop UMD Margaret Meixner (STScI)

  15. Supergiants: ALMA Workshop UMD Margaret Meixner (STScI)

  16. Supernova Explosions: ALMA will track the radio light curves SN1988Z (Williams et al. 2002) ALMA Workshop UMD Margaret Meixner (STScI)

  17. Supernova Remnants (SNRs): SNR IC443 is caught interacting with a molecular cloud Seta et al. (1998) ALMA Workshop UMD Margaret Meixner (STScI)

  18. Gamma Ray Bursts Millimeter wave trace of afterglows (Sheth et al. 2003) SWIFT 2004?-?, hopefully overlap with first ALMA ALMA Workshop UMD Margaret Meixner (STScI)

  19. Massive Star Death with ALMA • Targets of opportunities to study new supernovae • SNR-ISM shocks: extended to LMC/SMC • Supergiants dust formation, circumstellar chemistry • Gamma Ray Burst followup to study their environment and test massive stellar explosion paradigm ALMA Workshop UMD Margaret Meixner (STScI)

  20. Summary • Stars and dying stars are excellent first light objects and should be on the list of first targets for ALMA 2008 • Target of opportunities should be pursued with ALMA and synoptic observations of fields considered • ALMA will provide a deeper look into our nearest neighboring stars and extend our study of evolved stellar populations to the local group ALMA Workshop UMD Margaret Meixner (STScI)

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