Rotation of stars in NGC 6134. A comparison of d Scuti stars and non-variable stars

Autor(en)

M B Rasmussen, H Bruntt, Søren Frandsen, Ernst Paunzen, Hans Michael Maitzen

Abstrakt

We present results of spectroscopic observations of selected stars in the southern open cluster NGC 6134. We have determined the rotational velocities of the six known d Scuti stars in NGC 6134 as well as several other non-variable stars with similar colour temperature in order to investigate if v sin i and variability is somehow connected: we find no such correlation. We also compare the distribution of v sin i of d Scuti stars and non-variable stars with four other well-studied open clusters to look for any systematic behaviour, but we find no conclusive evidence for v sin 1 and variability to be connected. We have also used the spectra to carry out an abundance analysis of the d Scuti stars in NGC 6134 to confirm the high metal content of the cluster. We find [Fe/H] = +0.38 ‘ 0.05 which is in agreement with the result obtained from Strošmgren photometry. We also present ?a photometry of the cluster, but we find no chemical peculiar stars based on this index.

Organisation(en)

Institut für Astrophysik

Externe Organisation(en)

Aarhus University, Copenhagen University Observatory

Journal

Astronomy & Astrophysics

Band

390

Seiten

109-119

Anzahl der Seiten

11

ISSN

0004-6361

Publikationsdatum

2002

Peer-reviewed

Ja

ÖFOS 2012

103003 Astronomie

Link zum Portal

https://ucrisportal.univie.ac.at/de/publications/c72e0669-f1c2-4e69-b411-1084c9497b07