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Asymptotic giant branch stars near the sun
Available red and near-infrared photometry and apparent motions of M, S,and C asymptotic giant branch (AGB) stars in the Bright Star Catalogueare tabulated and discussed. It is shown that the red and near infraredindices normally used for late-type stars are interchangeable except forcarbon stars. The M-type giants are variable with visual amplitudegreater than 0.05 mag. The reddening-free parameter m2 from Genevaphotometry is essentially a temperature parameter for M giants, whilethe reddening-free parameter d is a sensitive detector of blue stellarcompanions. The space density of AGB stars near the sun decreases by afactor of 35 in a temperature range 3800 to 3400 K. Two of the S starsnear the sun were found to have nearly equal space motions and may becomembers of the Arcturus group.
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Abstract image available at:http://adsabs.harvard.edu/cgi-bin/nph-bib_query?1985A&AS...59...15A&db_key=AST
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Osservazione e dati astrometrici
| Costellazione: | Compasso |
| Ascensione retta: | 13h54m48.90s |
| Declinazione: | -67°39'09.0" |
| Magnitudine apparente: | 5.71 |
| Distanza: | 389.105 parsec |
| Moto proprio RA: | -16 |
| Moto proprio Dec: | -15.6 |
| B-T magnitude: | 7.673 |
| V-T magnitude: | 5.882 |
Cataloghi e designazioni:
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