Far-infrared Column Density and Temperature Data
Description
Far-infrared continuum maps provide an excellent tracer of the warm (~20 K) regions in star-forming regions. The emission is due to a combination of thermally radiating dust and transiently heated dust. Because the emission is usually optically thin, it traces material the entire line of sight and allows for a (temperature weighted) measure of the colmn density. The column density and temperature maps presented here are derived from the latest release of the IRAS data set (IRIS). A description of the method used to derive the dust temperature and column density from the 60 and 100 micron IRAS emission maps can be found in Schnee, Ridge, Goodman and Li (2005).
Dataverse Pages
- IRAS Based Thermal Emission Maps of Perseus
- IRAS Based Thermal Emission Maps of Ophiuchus
- IRAS Based Thermal Emission Maps of Serpens
- IRAS Based Thermal Emission Maps of Taurus
Available Data Products
| Description | Status | Completion Date |
|---|---|---|
| Perseus Temperature Map (FITS file) | Complete | Jul 2005 |
| Perseus Column Density Map (FITS file) | Complete | Jul 2005 |
| Ophiuchus Temperature Map (FITS file) | Complete | Jul 2005 |
| Ophiuchus Column Density Map (FITS file) | Complete | Jul 2005 |
| Serpens Temperature Map (FITS file) | Complete | Jul 2005 |
| Serpens Column Density Map (FITS file) | Complete | Jul 2005 |
IRAS Based Thermal Emission Maps
Click on one of the links below to view images.
Index • Serpens • Ophiuchus • Perseus • Taurus
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By recalibrating IRAS 60 and 100 µm data from the IRAS Sky Survey Atlas (ISSA) we have created new, highly-sensitive temperature and column-density maps. The maps show some surprising new features that are not apparent in the near-infrared extinction maps or molecular-line emission maps of the same regions. For example, in this temperature map of Ophiuchus we find a warm (37K) dust ring centered on the crosshairs. This ring is centered on the B star &rho-Ophiuchus, 1 degree north of the well-studied ρ-Oph star-forming cluster. A number of xray sources, including the ROSAT source 1RXSJ162554.5-233037, which has very hard xray emission characteristic of a compact object are also projected to lie within the ring. Click on the above links to view images or download FITS files for the other regions. |
Contact Person
Scott Schnee, California Institute of Technology
Telescope Information
COMPLETE Web Master: Sarah Block • COMPLETE PI: Alyssa Goodman
This material is based upon work supported by the National Science Foundation under Grant No. AST-0407172.
Any opinions, findings, and conclusions or recommendations expressed in this material are those of the author(s)
and do not necessarily reflect the views of the National Science Foundation.
Document URL: lweb.cfa.harvard.edu/COMPLETE/data_html_pages/IRAS.html
Last Modified: Thursday, 14-Feb-2013 13:01:02 EST