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14 papers · 1 filter
NGC 2401: A template of the Norma-Cygnus Arm's young population in the Third Galactic Quadrant
G. Baume, A. Moitinho, R. Vazquez +3
Based on a deep optical CCD (UBV(RI)_C) photometric survey and on the Two-Micron All-Sky-Survey (2MASS) data we derived the main parameters of the open cluster NGC 2401. We found t…
Gemini/GMOS Spectra of Globular Clusters in the Leo Group Elliptical NGC 3379
Michael Pierce, Michael A. Beasley, Duncan A. Forbes +8
We have obtained Gemini/GMOS spectra for 22 GCs associated with NGC 3379. We derive ages, metallicities and alpha-element abundance ratios from simple stellar population models usi…
The Origin and Nature of Neptune-like Planets Orbiting Close to Solar Type Stars
Adrián Brunini, Rodolfo G. Cionco
The sample of known exoplanets is strongly biased to masses larger than the ones of the giant gaseous planets of the solar system. Recently, the discovery of two extrasolar planets…
The gravitational wave radiation of pulsating white dwarfs revisited: the case of BPM 37093 and PG 1159-035
E. Garcia-Berro, P. Loren-Aguilar, A. H. Corsico +3
We compute the emission of gravitational radiation from pulsating white dwarfs. This is done by using an up-to-date stellar evolutionary code coupled with a state-of-the-art pulsat…
Open clusters in the Third Galactic Quadrant. II. The intermediate age open clusters NGC 2425 and NGC 2635
A. Moitinho, G. Carraro, G. Baume +1
We analyse CCD broad band (UBV(RI)c) photometric data obtained in the fields of the poorly studied open clusters NGC 2425 and NGC 2635. Both clusters are found to be of intermediat…
On the evolutionary status of Be stars. I. Field Be stars near the Sun
J. Zorec, Yves Fremat, L. Cidale
A sample of 97 galactic field Be stars were studied by taking into account the effects induced by the fast rotation on their fundamental parameters. All program stars were observed…