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Orion notes
Orion Nebula - some possible uses for non-optical data which are accessible.
Aladin suggests that there are many available data on the Orion Nebula
incl. the MERLIN XMM and ISO data already mentioned plus HST and
CHANDRA in fields which cover the Trapezium and the Proplyd region.
Also the large size of the region means that low-res surveys like NVSS
might be useful.
The
Aladin Orion Nebula Screenshot shows
part of the XMM image; MERLIN Chandra and HST also already;
however the full MERLIN field isn't yet (covers approx whole area shown) and
the HST astrometry probably needs attention. Also ISO spectra and
ISOCAM although I could not find direct data link. Many catalogues
also.
Bottom line is that there are X-ray, optical (ESO?), IR/mm and radio
detections of the Trapezium stars and proplyds (not sure about ISO
proplyds) but not full multi-wavelength correlations e.g. between
radio and X-ray Proplyds, location of emission of various kinds in
Trapezium system. One question is the survival of the Proplyds which are being ablated by the Trapezium stars. The exact character of the latter and hence their lifetimes determines whether the Proplyds will survive long enough to e.g. form planets. The multi-wavelength stuff will help to characterise the hot stars and suggest the emission mechanisms and hence destruction/evolution of the Proplyds, ISO lines e.g. silicates, ices, maybe gas abundance in discs will add even more...
In the Trapezium, Theta 1 Ori A is an enigmatic system which seems to
have X-ray e.g. 2003ApJ...595...365S but no-one seems to have yet related
this to the other material on the nature of this system.
The Trapezium stars are visible at most wavelengths e.g. ISO Spectra
2000A&A...358..708C; radio 2002evlb.conf..259G
The Proplyds have also been extensively observed, and some are X-ray
2001ApJ...549..441S (catalogue in Vizier) and radio sources
e.g. 2002ApJ...566..315H as well as the famous HST observations
1998AJ....115..263O 1996AJ....111..846O (catalogue in Vizier)
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