Delta Doradus Referencias Menú de navegaciónDelta Doradus«Spitzer IRS Spectroscopy of IRAS-discovered Debris Disks»Catalogue of Stellar Diameters (CADARS)«Rotational velocities of A-type stars. III. Velocity distributions»«Debris Disk Evolution around A Stars»

Estrellas blancas de la secuencia principalConstelación de DoradoÓrbita de la Luna


estrellaconstelaciónDoradomagnitud aparenteα Doradusβ Doradusγ Doradusaños luzsistema solarestrella blanca de la secuencia principaltipo espectralKAltairγ Craterisθ Cassiopeiaemagnitud absolutaradio solarvelocidad de rotaciónkm/sradiación infrarrojaμmestrella polarLunapolo celestePolarisTierra




























Delta Doradus


Constelación

Dorado

Ascensión recta α
05h 44min 46,38s

Declinación δ
-65º 44’ 07,9’’

Distancia
145 años luz

Magnitud visual
+4,35

Magnitud absoluta
+1,10

Luminosidad
33 soles

Temperatura
8360 K

Radio
2,1 soles

Tipo espectral
A7V

Velocidad radial
-3 km/s

Delta Doradus (δ Dor / HD 39014 / HR 2015)[1]​ es una estrella de la constelación de Dorado de magnitud aparente +4,34. Es la cuarta más brillante de la misma después de α Doradus, β Doradus y γ Doradus. Se encuentra a 145 años luz de distancia del sistema solar.


Delta Doradus es una estrella blanca de la secuencia principal de tipo espectral A7V[1]​ con una temperatura superficial de 8360 K.[2]​ Del mismo tipo espectral que Altair (α Aquilae), γ Crateris o θ Cassiopeiae, es más luminosa que cualquiera de ellas, siendo su magnitud absoluta +1,10. Tiene un radio 2,1 veces mayor que el radio solar[3]​ y gira sobre sí misma con una velocidad de rotación igual o mayor a 172 km/s.[4]​ Su edad se estima en 590 millones de años.[2]​ Asimismo, muestra un exceso de radiación infrarroja a 60 μm.[5]​


Delta Doradus es la estrella polar del sur en la Luna. Aunque mejor alineada con el polo celeste que Polaris (α Ursae Minoris) en la Tierra, es sin embargo mucho más tenue que esta.



Referencias



  1. ↑ ab Delta Doradus (SIMBAD)


  2. ↑ ab Chen, C. H.; Sargent, B. A.; Bohac, C.; Kim, K. H.; Leibensperger, E.; Jura, M.; Najita, J.; Forrest, W. J.; Watson, D. M.; Sloan, G. C.; Keller, L. D. (2004). «Spitzer IRS Spectroscopy of IRAS-discovered Debris Disks». The Astrophysical Journal Supplement Series 166 (1). pp. 351-377. 


  3. ↑ Catalogue of Stellar Diameters (CADARS) (VizieR, SIMBAD)


  4. ↑ Royer, F.; Zorec, J.; Gómez, A. E. (2007). «Rotational velocities of A-type stars. III. Velocity distributions». Astronomy and Astrophysics 463 (2). pp. 671-682. 


  5. ↑ Su, K. Y. L.; Rieke, G. H.; Stansberry, J. A.; Bryden, G.; Stapelfeldt, K. R.; Trilling, D. E.; Muzerolle, J.; Beichman, C. A.; Moro-Martin, A.; Hines, D. C.; Werner, M. W. (2006). «Debris Disk Evolution around A Stars». The Astrophysical Journal 653 (1). pp. 675-689. 








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