We briefly communicate about 21st run of the Whole Earth Telescope (WET) in April 2001, where the eclipsing short period binary sdB system PG 1336-018 was the primary target.
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About 21st Run of Wet: PG 1336-018Dorokhova, T. N. et al.122001
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Absorption line indices for studying stellar populations
Absorption line-strengths have allowed us to carry out a comprehensive stellar populations analysis, providing very strong constraints for discriminating and constraining current galaxy formation scenarios. I describe the main features of this approach, pinpointing the most popular indices and diagnostic diagrams, and the main problems affecting
Vazdekis, A.Advertised on:
122005 -
Abundance Gradients in the Galaxy (Invited paper)
Not Available
Esteban, C. et al.Advertised on:
121995 -
Abundance ratios and IMF slopes in the dwarf elliptical galaxy NGC 1396 with MUSE
Deep observations of the dwarf elliptical (dE) galaxy NGC 1396 (MV = -16.60, Mass ˜4 × 108 M⊙), located in the Fornax cluster, have been performed with the Very Large Telescope/Multi Unit Spectroscopic Explorer spectrograph in the wavelength region from 4750 to 9350 Å. In this paper, we present a stellar population analysis studying chemical
Puzia, T. et al.Advertised on:
122016 -
Accretion Disk Lifetimes and Stellar Rotation Periods for Young Stars in NGC 2264
We present the initial results of a study aimed at: (1) determining the lifetime of the disk accretion phase among low mass pre-main sequence stars; (2) establishing the time dependence of disk mass accretion rates; and (3) further exploring the role played by accretion disks in regulating stellar rotation. Our laboratory for this study is NGC 2264
Makidon, R. B. et al.Advertised on:
121997 -
Accretion tori and cones of ionizing radiation in Seyfert galaxies
The photoionization of extended narrow-line regions in Seyfert galaxies by the radiation produced in a thick accretion disk is studied. The emission-line spectrum is calculated for a range of black hole masses, varying the values of the ionization parameter and the disk size. It is found that models with a million solar masses fit observations of
Acosta-Pulido, Jose A. et al.Advertised on:
121990