opening of the 60-210 Ám window by PACS to sensitive photometry and
spectro-scopy at high spatial resolution will address a wide range of
key questions of current astrophysics concerning the |
The Herschel Mission
The Far Infrared and Submillimetre Telescope FIRST is ESA's cornerstone mission designed to study
the universe in a largely unexplored wavelength regime, with an launch year 2008. A passively cooled 3.5m telescope provides the opportunity for high spatial resolution, sensitive observations
over the range from 60 to 670 microns.
Main scientic drivers of the FIRST mission include
Investigations of the distant universe, studying the history of star formation and activity in
galaxies through extensive surveys and dedicated follow-up observations.
Studies of the origins of stars through photometric and spectroscopic surveys of star forming
regions and pre-stellar condensations.
Physics and chemistry of the interstellar medium.
Solar system studies.
The instrument complement selected for FIRST to achieve these goals includes a 60-210 microns cam-
era/spectrometer (PACS), a 200-670 microns camera/low resolution spectrometer (SPIRE) and a hetero-
dyne high resolution spectrometer (HIFI).
The basic concept of PACS is to provide
- Ecient imaging and photometry in several wavelength bands within the 60-210 microns range, fully
exploiting the telescope's imaging performance.
- Spectroscopy and spectroscopic mapping, with the possibility to cover at spectral resolution
about 1000 to 2000 the entire 60-210 microns wavelength range or short segments.
Get the Science
Requirements Document and observing
- Extragalactic surveys: Galaxy formation in the early universe
- Star formation and the interstellar medium
is also intended to be an important driver for other projects which
will explore adjacent spectral regions, such as JWST in the near/mid IR
and ALMA in the mm domain.|
The contents of this page are based on the Science Requirements Document and the official home page for PACS
edited by Eckhard Sturm
Go back to PACS Instrument page