Zobrazeno 1 - 10
of 399
pro vyhledávání: '"Lub, J."'
A probabilistic approach has been used in combination with the parallax data from Gaia (e)DR3 to calibrate Period-Luminosity-(Abundance) (PLZ) Relations covering a wide range of visual to Infrared observations of RR Lyrae stars. Absolute Magnitude Re
Externí odkaz:
http://arxiv.org/abs/2303.02211
Autor:
Braga, V. F., Stetson, P. B., Bono, G., Dall'Ora, M., Ferraro, I., Fiorentino, G., Freyhammer, L. M., Iannicola, G., Marengo, M., Neeley, J., Valenti, E., Buonanno, R., Calamida, A., Castellani, M., da Silva, R., Degl'Innocenti, S., Di Cecco, A., Fabrizio, M., Freedman, W. L., Giuffrida, G., Lub, J., Madore, B. F., Marconi, M., Marinoni, S., Matsunaga, N., Monelli, M., Persson, S. E., Piersimoni, A. M., Pietrinferni, A., Prada-Moroni, P., Pulone, L., Stellingwerf, R., Tognelli, E., Walker, A. R.
New accurate and homogeneous optical UBVRI photometry has been obtained for variable stars in the Galactic globular $\omega$ Cen (NGC 5139). We secured 8202 CCD images covering a time interval of 24 years and a sky area of 84x48 arcmin. The current d
Externí odkaz:
http://arxiv.org/abs/1609.04916
We present a new derivation of the CORS Baade-Wesselink method in the Walraven photometric system. We solved the complete Baade-Wesselink equation by calibrating the surface brightness function with a recent grid of atmosphere models. The new approac
Externí odkaz:
http://arxiv.org/abs/1012.4376
Autor:
Pedicelli, S., Lemasle, B., Groenewegen, M., Romaniello, M., Bono, G., Laney, C. D., Francois, P., Buonanno, R., Caputo, F., Lub, J., Pel, J. W., Primas, F., Pritchard, J.
We provided accurate estimates of distances, radii and iron abundances for four metal-rich Cepheids, namely V340 Ara, UZ Sct, AV Sgr and VY Sgr. The main aim of this investigation is to constrain their pulsation properties and their location across t
Externí odkaz:
http://arxiv.org/abs/1003.3854
Autor:
Pedicelli, S., Bono, G., Lemasle, B., Francois, P., Groenewegen, M., Lub, J., Pel, J. W., Laney, D., Piersimoni, A., Romaniello, M., Buonanno, R., Caputo, F., Cassisi, S., Castelli, F., Leurini, S., Pietrinferni, A., Primas, F., Pritchard, J.
Aims: The iron abundance gradient in the Galactic stellar disk provides fundamental constraints on the chemical evolution of this important Galaxy component. However the spread around the mean slope is, at fixed Galactocentric distance, larger than e
Externí odkaz:
http://arxiv.org/abs/0906.3140
Autor:
Pedicelli, S., Lub, J., Pel, J. W., Lemasle, B., Bono, G., Francois, P., Laney, D., Piersimoni, A., Primas, F., Romaniello, M., Buonanno, R., Caputo, F., Cassisi, S., Castelli, F., Pietrinferni, A., Pritchard, J.
We present new empirical and theoretical calibrations of two photometric metallicity indices based on Walraven photometry. The empirical calibration relies on a sample of 48 Cepheids for which iron abundances based on high resolution spectra are avai
Externí odkaz:
http://arxiv.org/abs/0712.3006
Autor:
Garcia-Hernandez, D. A., Garcia-Lario, P., Plez, B., Manchado, A., D'Antona, F., Lub, J., Habing, H.
Lithium and zirconium abundances (the latter taken as representative for s-process enrichment) are determined for a large sample of massive Galactic O-rich AGB stars, for which high resolution optical spectroscopy has been obtained (R=40,000-50,000).
Externí odkaz:
http://arxiv.org/abs/astro-ph/0609106
Autor:
Garcia-Hernandez, D. A., Garcia-Lario, P., Plez, B., Manchado, A., D'Antona, F., Lub, J., Habing, H.
Publikováno v:
AIP Conf.Proc.804:137-140,2006
We present the main results derived from a chemical analysis carried out on a large sample of galactic O-rich AGB stars using high resolution optical spectroscopy (R~40,000-50,000) with the intention of studying their lithium abundances and/or possib
Externí odkaz:
http://arxiv.org/abs/astro-ph/0509051
Akademický článek
Tento výsledek nelze pro nepřihlášené uživatele zobrazit.
K zobrazení výsledku je třeba se přihlásit.
K zobrazení výsledku je třeba se přihlásit.
We have developed a new procedure to identify moving groups, and have applied it to carry out a census of the nearby OB associations based on Hipparcos parallaxes and proper motions (see de Bruijne et al. and de Zeeuw et al. elsewhere in this volume)
Externí odkaz:
http://arxiv.org/abs/astro-ph/9707088