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Amplification by stimulated emission in Rydberg Matter clusters as the source of intense maser lines in interstellar space

Artikel i vetenskaplig tidskrift
Författare Leif Holmlid
Publicerad i Astrophysics and Space Science
Volym 305
Nummer/häfte 1
Sidor 91-98
Publiceringsår 2006
Publicerad vid Institutionen för kemi
Sidor 91-98
Språk en
Länkar <Go to ISI>://000242126700011
Ämnesord masers, ISM : molecules, ISM : lines and bands, line : formation, TIME-OF-FLIGHT, COULOMB EXPLOSIONS, RAMAN-SPECTROSCOPY, ENERGY-RELEASE, POLARIZATION, LASER, BANDS, MODEL
Ämneskategorier Fysikalisk kemi

Sammanfattning

The detailed processes giving maser line radiation from various molecules in space are not well understood, as can be seen from many recent detailed studies of maser line emission with high spatial and velocity resolution, and with polarization measurements. We now propose an improved maser mechanism based on amplification of the original molecular line emission by stimulated emission in Rydberg Matter (RM) clouds in HII regions, containing clusters H-N and (H-2)(N) . This mechanism will amplify the molecular lines, depending on the position, velocity, cluster size and state of excitation of the clusters in the RM cloud. RM will only support certain frequencies, corresponding to rotational transitions of the clusters. The bond lengths in the RM clusters are known within 1% from radio frequency emission measurements in the laboratory, and it is now shown that all the commonly studied maser lines agree well with stimulated emission transitions in several types of RM clusters simultaneously. This may explain the strongly varying intensities of neighboring or related maser lines, an important effect that is not well understood previously. It is also pointed out that the magnetic field due to RM is of the same order of magnitude as observed from the Zeeman splitting in maser lines; thus, the molecules that are the original sources of the lines may be embedded in the RM clouds, for example in dense HII regions that are likely to be RM regions.

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