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CCD astrometry and components instrumental magnitude difference of 432 Hipparcos wide visual double stars
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Not Available
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| A second list of wide visual binaries
Not Available
| A second list of wide visual binaries
Not Available
| Lithium in the Hyades, the Hyades moving group, and Praesepe
High-resolution spectra of 35 F main-sequence stars have been obtainedat high SNRs in the region of the Li I resonance line at 6708 A.Fourteen of the stars are members of the Hyades, six are members ofPraesepe, and the remaining 15 stars are members of the Hyades MovingGroup. Equivalent widths of the Li resonance line and of Fe lines in thesame spectral region were measured and Li and Fe abundances werecalculated from spectral synthesis using Kurucz model atmospheres. Amean metallicity of (Fe/H) = + 0.17 + or - 0.06 for the Hyades, + 0.13 +or - 0.07 for Praesepe, and + 0.11 + or - 0.09 for the Hyades MovingGroup is obtained. The Li abundance patterns are consistent with thosefound previously for the Hyades stars and for the Praesepe stars, butsome of the Hyades Moving Group members do not fit this Li-temperatureprofile well. The possibility exists that the Hyades Moving Group is notcoeval and that its members have little in common other than kinematics.
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Not Available
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Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1963AJ.....68..483E&db_key=AST
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Member of following groups:
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Observation and Astrometry data
| Constellation: | Éridan |
| Right ascension: | 03h03m01.79s |
| Declination: | -02°05'11.2" |
| Apparent magnitude: | 7.521 |
| Distance: | 53.163 parsecs |
| Proper motion RA: | 109.4 |
| Proper motion Dec: | 22.1 |
| B-T magnitude: | 8.125 |
| V-T magnitude: | 7.571 |
Catalogs and designations:
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