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A Holistic View of the Magnetic Field in the Eridanus/Orion Region We present observations of 21 cm emission-line Zeeman splitting at 217positions in the Orion/Eridanus loop region and incorporate them withstellar polarization data in a partially successful attempt to develop aholistic interpretation of the magnetic field structure on small andlarge size scales. We develop the "paraboloidal model" to describe theidealized perturbation to ambient magnetic field lines expected for aworm/chimney structure. We compare the magnetic field data to this modeland find fair agreement for part of the region. On the small scale ofone of the molecular clouds, previous interpretations invoke a helicalfield; in contrast, our interpretation invokes the Eridanus shock andits interaction with dense molecular clouds, in which the observedreversal in the line-of-sight field occurs naturally.
| A new list of 617 radial velocities in four galactic fields Four stellar fields in the -30 deg galactic latitude have been surveyedfor radial velocities, using a 62 cm objective prism. Exact positions,spectral types, and approximate magnitudes are provided for 617 stars infour different 4 x 4 deg fields. B to F4 stars were found which haveGaussian velocity distributions.
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Osservazione e dati astrometrici
Costellazione: | Toro |
Ascensione retta: | 04h16m06.11s |
Declinazione: | +09°02'26.4" |
Magnitudine apparente: | 8.657 |
Moto proprio RA: | 42.7 |
Moto proprio Dec: | -12.4 |
B-T magnitude: | 9.082 |
V-T magnitude: | 8.693 |
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