1 / 8

Group Summary:

Group Summary:. Stars and Their Evolution ALMA Science Workshop. Science Summaries.

more
Télécharger la présentation

Group Summary:

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. Group Summary: Stars and Their Evolution ALMA Science Workshop

  2. Science Summaries The stellar theme involves different kinds of science, from the Sun to active stars to stellar atmosphere studies to dying stars and dead stars: will utilize the full complement of sensitivity, spatial & spectral resolution, mosaicing capabilities of ALMA

  3. Science not in DRSP • Interacting winds e.g. MWC 349, recombination line maser with BIMA, relatively few sources, but very bright (20 Jy), so ALMA should see more of these • Eta Carina radio outbursts • ESP work -> targets for TPF (tie in with NASA = $$ ?) • Astrobiology (tie in with NASA = $$ ?) • Astrometry/PM of embedded objects, star forming regions (not possible with SIM)

  4. Issues 1 • Software - ?? • Image analysis tools + general modelling tools for survey work (e.g. XPEC, CIAO for X-ray astronomy) • Support for faculty & postdocs, not just grad students • CV site: host workshops (focus on science area) for broader impact, talk series • Support astronomers -> independent research time (HST model of data analysts?)

  5. Issues 2 • ALMA scientists to work with new mm/sub-mm users • Big emphasis on EPO for public support and funding • Multi-wavelength perspective crucial, how to coordinate with ground-based & space-based observatories (policy?, time sharing?) • Short time variability: Sun essential, other projects also necessary (stellar flares) • Keep VLBI possibility e.g. AGB stars

  6. Frequency Bands • Change nomenclature!!! Band 5 is meaningless to the astronomical community; use center frequency or wavelength instead • Band 1 impt: SiO line, Ka band NASA spacecraft communication ($$?) • Band 5 impt: H2O line, evolved stars & CS envelopes, thermal H2O emission in ISM • Band 4 impt: multitude of molecular lines in CS envelopes • Band 8 [C I] + HDO (or get H2O with Band 5)

  7. ACA • Roughly 50% of stellar theme DRSP requests ACA/mosaicing capabilities • Sun: absolute necessity of mosaicing • Stellar envelopes: need ~1 arcminute scales • “Dirty secret of interferometry” mosaicing to get uniform sensitivity

  8. Early Science • “First light objects”: planetary nebulae, AGB stars -> pretty images + significant science • Eta Car, SN 1987A, Beta Pic disk

More Related