A millimeter spectral survey of the Orion Bar Photo Dissociation Region

Other

Scientific paper

Rate now

  [ 0.00 ] – not rated yet Voters 0   Comments 0

Details

Scientific paper

FUV radiation strongly affects the chemical state of interstellar gas and dust, from protoplanetary disks to entire galaxies. Warm and dense photodissociation regions (PDRs) are the transition layers between the ionized gas illuminated by intense UV fields from nearby OB massive stars and the cold neutral gas shielded from UV radiation. Despite their relevance in a wider astrophysical context, the observational limits of the chemical complexity in FUV--illuminated environments are poorly constrained. In fact, no unbiased line survey of any archetypal interstellar PDR had been carried out with the IRAM-30m telescope. We have started a shallow line survey of the Orion Bar (the prototypical warm PDR) with the IRAM-30m telescope using the new EMIR receivers. We have identified tens of lines (with detection densities of ~4 lines/GHz). Half of the detected lines have been assigned to: HCN, HCO, C_3H_2, HCO^+, SiO, C_4H, HOC^+, CS, CH_3OH, H_2CO, SO, C_2H, H_2CS, SO_2, HNC, C_3H, DCN, HCS^+, NS, SO^+, etc. Some of them were not considered to be specific ``PDR-tracers'' before. The other set lines comes from isotopologues (D, 18O, 34S, ...), vibrationally excited levels and more complex organic molecules. The latter ones were clearly not expected in a region illuminated by a strong FUV field. In this contribution we summarize the current status of the proyect and present the first set of line detections and results.

No associations

LandOfFree

Say what you really think

Search LandOfFree.com for scientists and scientific papers. Rate them and share your experience with other people.

Rating

A millimeter spectral survey of the Orion Bar Photo Dissociation Region does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with A millimeter spectral survey of the Orion Bar Photo Dissociation Region, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A millimeter spectral survey of the Orion Bar Photo Dissociation Region will most certainly appreciate the feedback.

Rate now

     

Profile ID: LFWR-SCP-O-929557

  Search
All data on this website is collected from public sources. Our data reflects the most accurate information available at the time of publication.