P. Focardi
University of Bologna
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Publication
Featured researches published by P. Focardi.
The Astronomical Journal | 1993
Laura Greggio; G. Marconi; M. Tosi; P. Focardi
The method proposed in Paper I [Tosi et al., AJ, 102, 951 (1991)] to study the star formation histories in nearby irregulars is here applied to the galaxies DDO 210 and NGC 3109. To this purpose we have obtained deep CCD photometry of two regions in DDO 210 and three regions in NGC 3109, reaching V ≃ 24 with the required accuracy of σ v ≤ 0.1 mag. Major information on the stellar populations, star formation rates, and initial mass functions of these regions in the last 1 Gyr are derived from the comparison of the observational color-magnitude diagrams and luminosity functions, with the corresponding synthetic diagrams and luminosity functions generated by a numerical simulation code based on stellar evolutionary tracks
The Astronomical Journal | 1995
G. Marconi; M. Tosi; Laura Greggio; P. Focardi
Our proposed method to study the star formation histories in nearby irregulars is here applied to NGC 6822. To this purpose we have obtained accurate CCD photometry of three regions in the galaxy, reaching V
Astronomy and Astrophysics | 2005
B. Kelm; P. Focardi; G. Sorrentino
\simeq
Astrophysics and Space Science | 1989
M. Tosi; Laura Greggio; P. Focardi
23.5 with an accuracy of
Astronomy and Astrophysics | 2009
Elisabetta Memola; G. Trinchieri; A. Wolter; P. Focardi; B. Kelm
\sigma_{BVR}\leq
The Astronomical Journal | 1992
A. P. Fairall; Christopher N. A. Willmer; J. H. Calderon; David W. Latham; L. N. da Costa; P. S. Pellegrini; Margarida Nunes; P. Focardi; G. Vettolani
0.1 mag. The comparison of the observational color-magnitude diagrams and luminosity functions with corresponding synthetic simulations reveals that the star formation activity in the last Gyr has been rather continuous, possibly occurring in long episodes separated by short quiescent periods, and that the initial mass function exponent
The Astronomical Journal | 1989
Christopher N. A. Willmer; P. Focardi; L. N. da Costa; P. S. Pellegrini
\alpha
The Astrophysical Journal | 2008
M. A. Martinez; A. del Olmo; R. Coziol; P. Focardi
is in the vicinity of Salpeters value. The studied regions of NGC~6822 appear to contain different stellar populations. The preferred star formation regime for Region A is a continuous activity coupled with a moderately flat
Astronomy and Astrophysics | 2006
P. Focardi; V. Zitelli; S. Marinoni; B. Kelm
\alpha
Astronomy and Astrophysics | 2004
B. Kelm; P. Focardi
. For Region C, instead, our best models suggest a discontinuous star formation and a moderately steep
