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Follow-up of unusual real-time and ERCSC objects with Herschel |
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Suomeksi
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Herschel, which operates at infrared frequencies, will be launched together
with the Planck satellite. Planck will provide us with a full-sky survey of
thousands of dusty active galaxies that are suitable for follow-up
observations with Herschel. The purpose of the project is to identify
interesting sources measured by Planck, and then quickly observe them
with Herschel, too.
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Infrared observations combined with radio obsevations help to
construct more complete spectra as well as pin down the exact position
and flux of the sources. From spectral lines we can determine the
temperature and density of interstellar matter in galaxies. In addition,
we can use Herschel observations in studying radio-loud active galaxies,
for example quasars (see science programme on
The astrophysics of quasars and BL Lac objects)
or GPS sources (see science programme on
Extreme GPS and other strongly inverted spectrum radio
sources ).
Preliminary Herschel proposals have been reviewed by the Planck Science Team
in 2006, and the two proposals from Metsähovi ("Target of Opportunity
Herschel observations of interesting active galactic nuclei detected with the
Planck Quick Detection System" and "Observing submm bright active galactic nuclei
with Herschel") have been approved for further processing.
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