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Transcript
Group Summary:
Stars and Their
Evolution
ALMA Science
Workshop
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
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)
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?)
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
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)
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
Early Science
• “First light objects”: planetary nebulae,
AGB stars -> pretty images + significant
science
• Eta Car, SN 1987A, Beta Pic disk