Spectral morphology and rotation in the open cluster NGC 6025

Grosso M.; Levato H.

Vol. 47 No. 2 (2011), Research articles

Vol. 47 No. 2 (2011)

Research articles

Spectral morphology and rotation in the open cluster NGC 6025

Published 2011-10-01

Grosso M.⁺⁻
Levato H.⁺⁻

Grosso M.

Instituto de Ciencias Astronómicas, de la Tierra y del Espacio (ICATE) Consejo Nacional de Investigaciones Científicas y Técnicas, CONICET Universidad Nacional de San Juan, Argentina

Levato H.

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Keywords

Hertzsprung-Russell and C-M diagrams
open clusters and associations: individual (NGC 6025)
stars: rotation

How to Cite

Spectral morphology and rotation in the open cluster NGC 6025. (2011). Revista Mexicana De Astronomía Y Astrofísica, 47(2), 255-259. https://astronomia.unam.mx/journals/rmxaa/article/view/2011rmxaa..47..255g

Abstract

We have performed spectral classification and measurements of the axial rotation velocity for the brightest stars in the region of the open cluster NGC 6025. A distance modulus of 9.80±0.06 (pe) and an age of 84 million years were derived. The brightest star of the cluster, HD 143448 was classified as B1Ve and it is a blue straggler as proposed by other authors (see Mermilliod 1982). We found three peculiar stars (two Si and one Hg-Mn?). Another star in the field shows emission but is probably a non-member. We also found two SB2 binaries. The average axial rotation for the cluster members seems to be 73% of the average rotation of the field stars with the same temperature.

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Spectral morphology and rotation in the open cluster NGC 6025

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