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Hubble Space Telescope Call for Proposals for Cycle 22 > Chapter 8: Filling Out the APT Proposal Form > 8.8 Scientific Category

8.8 Scientific Category
Specify one Scientific Category from the list below. Please adhere to our definitions of these categories. If you find that your proposal fits into several categories, then select the one that you consider most appropriate. If you are submitting a Calibration Proposal, then choose the Scientific Category for which your proposed calibration will be most important.
SOLAR SYSTEM: This includes all objects belonging to the solar system (except the Sun and Mercury), such as planets, comets, minor planets, asteroids, planetary satellites, and Kuiper-belt objects.
EXTRA-SOLAR PLANETS: This includes direct and indirect observations of all objects belonging to known extrasolar planetary systems, and observations of their host stars.
DEBRIS DISKS: This includes all studies of circumstellar and proto-planetary disks.
RESOLVED STAR FORMATION: This includes studies of forming and newly-formed stars, early stellar evolution, pre-main sequence stars, T-Tauri stars, Herbig-Haro objects, and FU Orionis stars.
UNRESOLVED STAR FORMATION: This includes studies of star formation in distant galaxies (beyond the Local Group).
COOL STARS: This applies to stars with effective temperatures less than 10,000 K, including halo subdwarfs, subgiants, giants, supergiants, AGB stars, pulsating/variable stars, brown dwarfs, stellar activity, atmospheres, chromospheres, and mass loss and abundance studies.
HOT STARS: This applies to stars that spend a significant fraction of their observable lives at an effective temperature higher than 10,000 K. It includes OB stars, neutron stars, white dwarfs, Wolf-Rayet stars, blue stragglers, central stars of PN, luminous blue variables, hot subdwarfs, supernovae, pulsars, X-ray binaries, and CVs.
ISM AND CIRCUMSTELLAR MATTER: This applies to the general properties of the diffuse medium within the Milky Way and nearby galaxies, including planetary nebulae, supernova remnants, winds and outflows, H II regions, giant molecular clouds, diffuse and translucent clouds, ionized gas in the halo, diffuse gas observed in emission or absorption, dust, dust extinction properties, dark clouds and deuterium abundance studies. This does not include observations of circumstellar disks and proto-planetary systems in young stellar objects, which are in the Debris Disks category.
RESOLVED STELLAR POPULATIONS: This includes resolved stellar populations in globular clusters, open clusters or associations, and the general field of the Milky Way and other nearby galaxies. Studies of color-magnitude diagrams, luminosity functions, initial-mass functions, internal dynamics and proper motions are in this category.
UNRESOLVED STELLAR POPULATIONS AND GALAXY STRUCTURE: This includes studies of the initial mass function, stellar content and globular clusters in distant galaxies, galaxy morphology and the Hubble sequence, and low surface-brightness galaxies. Starbursts, IR-bright galaxies, dwarf galaxies, galaxy mergers and interactions may fall under this heading.
ISM IN EXTERNAL GALAXIES: This category includes studies of gas distribution and dynamics in distant galaxies. Starbursts, IR-bright galaxies, dwarf galaxies, galaxy mergers, and interactions may also fall under this heading if the emphasis is on the ISM.
AGN/QUASARS: This encompasses active galaxies and quasars, including both studies of the active phenomena themselves, and of the properties of the host galaxies that harbor AGNs and quasars. The definition of AGN is to be interpreted broadly; it includes Seyfert galaxies, BL Lac objects, radio galaxies, blazars, and LINERs.
QUASAR ABSORPTION LINES AND IGM: This includes the physical properties and evolution of absorption-line systems detected along the line of sight to quasars, and other observations of the diffuse IGM. It includes spectroscopy and imaging of damped Ly-alpha systems.
COSMOLOGY: This includes studies of the structure and properties of clusters and groups of galaxies, strong and weak gravitational lensing, galaxy evolution through observations of galaxies at intermediate and high redshifts (including for example, the Hubble Deep Fields), cosmology in general, the structure of the universe as a whole, cosmological parameters and the extra-galactic distance scale.
Proposals in the Scientific Categories Solar System, Extra-solar Planets and Debris Disks will be reviewed by the Planets panels; proposals in the categories Cool Stars, Hot Stars, Resolved Star Formation, and ISM and Circumstellar Matter will be reviewed by the Stars panels; proposals in the category Resolved Stellar Populations will be reviewed by the Stellar Populations panels; proposals in the categories Unresolved Stellar Populations and Galaxy Structure, ISM in External Galaxies, and Unresolved Star Formation will be reviewed by the Galaxies panels; proposals in the categories AGN/Quasars and Quasar Absorption Lines and IGM will be reviewed by the AGN and IGM panels; proposals in the category Cosmology will be reviewed by the Cosmology panels.

Hubble Space Telescope Call for Proposals for Cycle 22 > Chapter 8: Filling Out the APT Proposal Form > 8.8 Scientific Category

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