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HD 26346


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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.

Four-colour and H-beta photometry of B stars in Fehrenbach and Burnage radial velocity fields at B about -30 deg
Observations in uvby and H-beta are presented for 39 stars classified asB-type in seven 4 x 4-deg fields studied by Fehrenbach and Burnage(1981, 1982) at b about -30 deg. About half the stars arephotometrically little-evolved B stars; most of the rest areintermediate A stars. Intrinsic color and absolute-magnitudecalibrations are applied: that of Hilditch et al. (1983) forintermediate A stars is estimated to be much less certain than those forother types. Maps of reddening along lines of sight indicate that littlereddening occurs within 100 pc of the sun, that essentially allreddening has occurred within z = + or - 150-200 pc, and that the totalreddening is essentially consistent with values given by the Bursteinand Heiles (1982) HI/GC method. The luminosities of some faint early Bstars cannot be usefully constrained by placing them within thereddening structure. One of the two program stars with very large radialvelocities is a horizontal branch object; the other has peculiar colors.

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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Observation and Astrometry data

Constellation:Ταύρος
Right ascension:04h10m19.91s
Declination:+08°24'53.2"
Apparent magnitude:8.272
Distance:180.832 parsecs
Proper motion RA:4.7
Proper motion Dec:1.9
B-T magnitude:8.526
V-T magnitude:8.293

Catalogs and designations:
Proper Names
HD 1989HD 26346
TYCHO-2 2000TYC 666-607-1
USNO-A2.0USNO-A2 0975-00922542
HIPHIP 19478

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