CCD UBVI photometry and polarimetry in the open cluster Trumpler 21

Giorgi, Edgard Ervar Salvador; Baume, Gustavo Luis; Vazquez, Ruben Angel; Feinstein, Alejandro

Artículos de revistas

Fecha

2001-04

Registro en:

Giorgi, Edgard Ervar Salvador; Baume, Gustavo Luis; Vazquez, Ruben Angel; Feinstein, Alejandro; CCD UBVI photometry and polarimetry in the open cluster Trumpler 21; Universidad Nacional Autónoma de México. Instituto de Astronomía; Revista Mexicana de Astronomía y Astrofísica; 37; 4-2001; 15-33

0185-1101

http://hdl.handle.net/11336/37082

CONICET Digital

CONICET

http://repositorioslatinoamericanos.uchile.cl/handle/2250/1896894

Autor

Giorgi, Edgard Ervar Salvador

Baume, Gustavo Luis

Vazquez, Ruben Angel

Feinstein, Alejandro

Institución

Consejo Nacional de Investigaciones Científicas y Tecnológicas (Argentina)

Resumen

CCD UBVI photometry was carried out in the field of the open cluster Trumpler 21. Our data locate the cluster at a distance of 1380 pc in a low absorption zone with E(B-V) = 0.25. The age of the cluster is estimated to be 25-30 × 106 yr based on the superposition of isochrones computed with mass loss and overshooting. The cluster mass spectrum has a slope of 1.44 similar to the typical value 1.35 for field stars. UBVRI polarimetry of its brightest members led us to the finding that diffuse interstellar material is responsible for both polarization percentage and its direction.

Materias

Open clusters

Trumpler 21 (estrellas)

Photometry

Polarimetry

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