High spatial resolution mapping of the Cepheus A region at 20, 50, and 100 microns

Details High spatial resolution mapping of the Cepheus A region at 20, 50, and 100 microns High spatial resolution mapping of the Cepheus A region at 20, 50, and 100 microns

Dec 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apj...365..287e&link_type=abstract

Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 365, Dec. 10, 1990, p. 287-295.

Astronomy and Astrophysics

Astronomy

10

Astronomical Maps, H Ii Regions, Infrared Sources (Astronomy), Spatial Resolution, Cepheus Constellation, Diffraction Limited Cameras, Far Infrared Radiation, Maximum Entropy Method, Star Formation

Scientific paper

The Cepheus A region at 20 microns has been mapped, and a bright, unresolved central source with a peak flux of 41 Jy into a 4.0 arcsec x 4.3 arcsec beam has been detected. One-dimensional slit scans have been obtained in two perpendicular directions across Cepheus A at 50 and 100 microns using a high spatial-resolution sampling technique. The temperature and optical depth profile of the far-IR emission are determined, and a peak temperature of 46 K and peak 100 micron optical depth of 0.4 are derived. Maximum entropy deconvolution of the far-IR scans indicate that there is a bright central core with clumpy extended emission. Within errors the position of the 50/100 micron peak is the same as the 20-micron source; this is interpreted as indicating that the 20 micron radiation represents the short-wavelength emission from the core of the dust cloud seen in the far-IR. It is concluded that an embedded source provides the major source of luminosity in the Cepheus A region.

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