Zobrazeno 1 - 10
of 35
pro vyhledávání: '"L. M. Freyhammer"'
Autor:
Jillian R. Neeley, M. Fabrizio, R. da Silva, A. Di Cecco, P. Prada-Moroni, Marco Castellani, R. F. Stellingwerf, Elena Valenti, R. Buonanno, L. M. Freyhammer, S. Marinoni, Scilla Degl'Innocenti, J. Lub, Barry F. Madore, Massimo Dall'Ora, Noriyuki Matsunaga, S. E. Persson, G. Giuffrida, Peter B. Stetson, Marcella Marconi, Adriano Pietrinferni, I. Ferraro, V. F. Braga, Annalisa Calamida, Alistair R. Walker, Giuseppe Bono, M. Marengo, Giuliana Fiorentino, M. Monelli, Emanuele Tognelli, A. M. Piersimoni, Wendy L. Freedman, G. Iannicola, L. Pulone
Publikováno v:
The Astronomical Journal, 152, 170
The Astronomical Journal
The Astronomical Journal
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:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::74f9b09f10c1613a0d002a0175469095
http://adsabs.harvard.edu/abs/2016AJ....152..170B
http://adsabs.harvard.edu/abs/2016AJ....152..170B
Publikováno v:
Monthly Notices of the Royal Astronomical Society: Letters. 404:L104-L108
We report the discovery of short periodic radial velocity variations in the stars HD 92499 and HD 143487. Both stars show strong magnetic fields and large overabundances of rare earth elements and belong to the class of cool chemically peculiar stars
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 402:1883-1891
The extraordinary magnetic Ap star HD 75049 has been studied with data obtained with the European Southern Observatory Very Large Telescope and 2.2-m telescopes. Direct measurements reveal that the magnetic field modulus at maximum reaches 30 kG. The
Autor:
A. Calamida, G. Bono, P. B. Stetson, L. M. Freyhammer, A. M. Piersimoni, R. Buonanno, F. Caputo, S. Cassisi, M. Castellani, C. E. Corsi, M. Dall’Ora, S. Degl’Innocenti, I. Ferraro, F. Grundahl, M. Hilker, G. Iannicola, M. Monelli, M. Nonino, N. Patat, A. Pietrinferni, P. G. Prada Moroni, F. Primas, L. Pulone, T. Richtler, M. Romaniello, J. Storm, A. R. Walker
Publikováno v:
Astrophysical Journal
Artículos CONICYT
CONICYT Chile
instacron:CONICYT
Calamida, A, Bono, G, Stetson, P B, Freyhammer, L M, Piersimoni, A M, Buonanno, R, Caputo, F, Cassisi, S, Castellani, M, Corsi, C E, Dall'Ora, M, Degl 'Innocenti, S, Ferraro, I, Grundahl, F, Hilker, M, Iannicola, G, Monelli, M, Nonino, M, Patat, N, Pietrinferni, A, Prada Moroni, P G, Primas, F, Pulone, L, Richtler, T, Romaniello, M, Storm, J & Walker, A R 2009, ' Strömgren photometry of galactic globular clusters. II. Metallicity distribution of red giants in ω Centauri ', Astrophysical Journal, vol. 706, pp. 1277-1298 . https://doi.org/10.1088/0004-637X/706/2/1277
Artículos CONICYT
CONICYT Chile
instacron:CONICYT
Calamida, A, Bono, G, Stetson, P B, Freyhammer, L M, Piersimoni, A M, Buonanno, R, Caputo, F, Cassisi, S, Castellani, M, Corsi, C E, Dall'Ora, M, Degl 'Innocenti, S, Ferraro, I, Grundahl, F, Hilker, M, Iannicola, G, Monelli, M, Nonino, M, Patat, N, Pietrinferni, A, Prada Moroni, P G, Primas, F, Pulone, L, Richtler, T, Romaniello, M, Storm, J & Walker, A R 2009, ' Strömgren photometry of galactic globular clusters. II. Metallicity distribution of red giants in ω Centauri ', Astrophysical Journal, vol. 706, pp. 1277-1298 . https://doi.org/10.1088/0004-637X/706/2/1277
We present new intermediate-band Stroemgren photometry based on more than 300 u,v,b,y images of the Galactic globular cluster Omega Cen. Optical data were supplemented with new multiband near-infrared (NIR) photometry (350 J,H,K_s images). The final
Autor:
Y. Bouzid, Massimo Dall'Ora, C. E. Corsi, Giuseppe Bono, C. Sterken, Jesper Storm, Annalisa Calamida, M. Monelli, G. Iannicola, L. M. Freyhammer, A. R. Walker, A. M. Piersimoni, Nicoletta Sanna, R. Buonanno, I. Ferraro, P. B. Stetson, L. Pulone, Mario Nonino, T. Tuvikene, Filippina Caputo, A. Di Cecco
Publikováno v:
The Astrophysical Journal. 686:L87-L90
We present precise optical and near-infrared ground-based photometry of two Globular Clusters (GCs): Omega Cen and 47 Tuc. These photometric catalogs are unbiased in the Red Giant Branch (RGB) region close to the tip. We provide new estimates of the
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 389:441-460
Chemically peculiar A stars (Ap) are extreme examples of the interaction of atomic element diffusion processes with magnetic fields in stellar atmospheres. The rapidly oscillating Ap stars provide a means for studying these processes in 3D and are at
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 385:1402-1430
The rapidly oscillating Ap stars are of importance for studying the atmospheric structure of stars where the process of chemical element diffusion is significant. We have performed a survey for rapid oscillations in a sample of 9 luminous Ap stars, s
Autor:
M. Del Principe, P. B. Stetson, Massimo Dall'Ora, R. Buonanno, I. Ferraro, Jesper Storm, Mario Nonino, M. Monelli, Annalisa Calamida, G. Iannicola, L. M. Freyhammer, A. M. Piersimoni, Giuseppe Bono, C. E. Corsi, V. Ripepi, L. Pulone, Marco Castellani, Filippina Caputo
Publikováno v:
The Astrophysical Journal. 652:362-369
We present new Near-Infrared (J,K) magnitudes for 114 RR Lyrae stars in the globular cluster Omega Cen (NGC 5139) which we combine with data from the literature to construct a sample of 180 RR Lyrae stars with J and K mean magnitudes on a common phot
Publikováno v:
Publications of the Astronomical Society of the Pacific. 117:601-614
We obtained high-precision time-series observations of stars in the open cluster NGC 1817 in order to find d Scuti stars among the cluster members. The detection of 12 d Scuti stars, of which our data suggest that 11 are cluster members, makes NGC 18
Autor:
L. M. Freyhammer, M. Monelli, G. Bono, P. Cunti, I. Ferraro, A. Calamida, S. Degl’Innocenti, P. G. Prada Moroni, M. Del Principe, A. Piersimoni, G. Iannicola, P. B. Stetson, M. I. Andersen, R. Buonanno, C. E. Corsi, M. Dall’Ora, J. O. Petersen, L. Pulone, C. Sterken, J. Storm
Publikováno v:
The Astrophysical Journal. 623:860-865
We present three different optical and near-infrared (NIR) data sets for evolved stars in the Galactic Globular Cluster Omega Cen The comparison between observations and homogeneous sets of stellar isochrones and Zero-Age Horizontal Branches provides