An HST/WFPC2 survey of bright young clusters in M31. IV. Ages and mass estimates (2009)
Perina, S., Cohen, J. G., Barmby, P., Beasley, M. A., Bellazzini, M., Brodie, J. P., ...
{Aims.} We present the main results of an imaging survey of possible young massive clusters (YMC) in M31 performed with the Wide Field and Planetary Camera2 (WFPC2) on the Hubble Space Telescope...
Galleti, S., Bellazzini, M., Buzzoni, A., Federici, L., Pecci, F. Fusi
We present a new homogeneous set of metallicity estimates based on Lick indices for 245 old globular clusters of the M31 galaxy comprised in the Revised Bologna Catalog. The metallicity distribution...
On the origin of the helium-rich population in Omega Centauri (2009)
Romano, D., Tosi, M., Cignoni, M., Matteucci, F., Pancino, E., Bellazzini, M.
To study the possible origin of the huge helium enrichment attributed to the stars on the blue main sequence of Omega Centauri, we make use of a chemical evolution model that has proven able to...
An HST/WFPC2 Survey of Bright Young Clusters in M31 III. Structural Parameters (2009)
Barmby, P., Perina, S., Bellazzini, M., Cohen, J. G., Hodge, P. W., Huchra, J. P., ...
Surface brightness profiles for 23 M31 star clusters were measured using images from the Wide Field Planetary Camera 2 on the Hubble Space Telescope, and fit to two types of models to determine the...
Carretta, E., Bragaglia, A., Gratton, R. G., Lucatello, S., Catanzaro, G., Leone, F., ...
We present abundances of Fe, Na, and O for 1409 red giant stars in 15 galactic globular clusters, derived from the homogeneous analysis of high resolution FLAMES/GIRAFFE spectra. Combining the...
Hodge, P. W., Krienke, O. K., Bellazzini, M., Perina, S., Barmby, P., Cohen, J. G., ...
We report on the properties of 89 low-mass star clusters located in the vicinity of luminous young clusters ("blue globulars") in the disk of M31. Eighty-two of the clusters are newly detected. We...
Hodge, P. W., Krienke, O. K., Bellazzini, M., Perina, S., Barmby, P., Cohen, J. G., ...
We report on the properties of 89 low mass star clusters located in the vicinity of luminous young clusters (blue globulars) in the disk of M31. 82 of the clusters are newly detected. We have...
The young stellar population at the center of NGC 205 (2009)
Monaco, L., Saviane, I., Perina, S., Bellazzini, M., Buzzoni, A., Federici, L., ...
Context. NGC 205 is a peculiar dwarf elliptical galaxy hosting in its center a population of young blue stars. Their origin is still matter of debate, the central fresh star formation activity...
Ibata, R., Bellazzini, M., Chapman, S. C., Dalessandro, E., Ferraro, F. R., Irwin, M., ...
We report the detection of a stellar density cusp and a velocity dispersion increase in the center of the globular cluster M54, located at the center of the Sagittarius dwarf galaxy (Sgr). The...
Red Clump stars in the Bootes III stellar system (2009)
Correnti, M., Bellazzini, M., Ferraro, F. R.
We report on the detection of a population of Red Clump (RC) stars probably associated with the recently discovered stellar system Bootes III. The RC is identified as a 3 sigma peak in the Luminosity...
The non-peculiar velocity dispersion profile of the stellar system omega Centauri (2009)
Sollima, A., Bellazzini, M., Smart, R. L., Correnti, M., Pancino, E., Ferraro, F. R., ...
We present the results of a survey of radial velocities over a wide region extending from r~10 arcmin out to r~80 arcmin (~1.5 tidal radii) within the massive star cluster omega Centauri. The survey...
Perina, S., Barmby, P., Beasley, M. A., Bellazzini, M., Brodie, J. P., Burstein, D., ...
Aims. We introduce our imaging survey of possible young massive globular clusters in M31 performed with the Wide Field and Planetary Camera 2 (WFPC2) on the Hubble Space Telescope (HST). We obtained...
Perina, S., Barmby, P., Beasley, M. A., Bellazzini, M., Brodie, J. P., Burstein, D., ...
{Aims.} We introduce our imaging survey of possible young massive globular clusters in M31 performed with the Wide Field and Planetary Camera 2 (WFPC2) on the Hubble Space Telescope (HST). We present...
Bellazzini, M., Ibata, R. A., Chapman, S. C., Mackey, A. D., Monaco, L., Irwin, M. J., ...
We present the results of a thorough study of the nucleus of the Sgr dwarf spheroidal galaxy and of the bright globular cluster M54 that resides within the same nucleus (Sgr,N). We have obtained...
Another Non-segregated Blue Straggler Population in a Globular Cluster: the Case of NGC 2419 (2008)
Dalessandro, E., Lanzoni, B., Ferraro, F. R., Vespe, F., Bellazzini, M., Rood, R. T., ...
We have used a combination of ACS-HST high-resolution and wide-field SUBARU data in order to study the Blue Straggler Star (BSS) population over the entire extension of the remote Galactic globular...
Beccari, G., Lanzoni, B., Ferraro, F. R., Pulone, L., Bellazzini, M., Pecci, F. Fusi, ...
We used a proper combination of multiband high-resolution and wide field multi-wavelength observations collected at three different telescopes (HST, LBT and CFHT) to probe Blue Straggler Star (BSS)...
Bellazzini, M., Ibata, R. A., Chapman, S. C., Mackey, A. D., Monaco, L., Irwin, M. J., ...
We present the results of a thorough study of the nucleus of the Sgr dwarf spheroidal galaxy (Sgr dSph) and of the bright globular cluster M54 (NGC 6715) that resides within the same nucleus (Sgr,N)....
The Tip of the Red Giant Branch (2007)
I review the latest results on the calibration of the Tip of the Red Giant Branch as a standard candle, in the optical and in the near infrared. The agreement among different and independent...
Open Clusters in the log Age vs. M_V plane (2007)
Bellazzini, M., Perina, S., Galleti, S., Federici, L., Buzzoni, A., Pecci, F. Fusi
In the log Age vs. integrated absolute magnitude (M_V) plane, the open clusters of the Milky Way form a well-defined band parallel to theoretical sequences decribing the passive evolution of Simple...
A near-ultraviolet view of the Inner Region of M31 with the Large Binocular Telescope (2007)
Beccari, G., Bellazzini, M., Clementini, G., Federici, L., Pecci, F. Fusi, Galleti, S., ...
We present a 900 sec, wide-field U image of the inner region of the Andromeda galaxy obtained during the commissioning of the blue channel of the Large Binocular Camera mounted on the prime focus of...
The Mass Function of omega Centauri down to 0.15 M_s (2007)
Sollima, A., Ferraro, F. R., Bellazzini, M.
By means of deep FORS1@VLT and ACS@HST observations of a wide area in the stellar system omega Cen we measured the luminosity function of main sequence stars down to R=22.6 and I_{F814W}=24.5 . The...
The extended structure of the remote cluster B514 in M31. Detection of extra-tidal stars (2007)
Federici, L., Bellazzini, M., Galleti, S., Pecci, F. Fusi, Buzzoni, A., Parmeggiani, G.
We present a study of the density profile of the remote M31 globular cluster B514, obtained from HST/ACS observations. Coupling the analysis of the distribution of the integrated light with star...
An updated survey of globular clusters in M31. II Newly discovered bright and remote clusters (2007)
Galleti, S., Bellazzini, M., Federici, L., Buzzoni, A., Pecci, F. Fusi
We present the first results of a large spectroscopic survey of candidate globular clusters located in the extreme outskirts of the nearby M31 galaxy. We obtained low resolution spectra of 48 targets...
The Rotation of Sub-Populations in omega Centauri (2007)
Pancino, E., Galfo, A., Ferraro, F. R., Bellazzini, M.
We present the first result of the Ital-FLAMES survey of red giant branch (RGB) stars in omega Cen. Radial velocities with a precision of ~0.5 km/s are presented for 650 members of omega Cen observed...
The chemical evolution of Omega Centauri's progenitor system (2007)
Romano, D., Matteucci, F., Tosi, M., Pancino, E., Bellazzini, M., Ferraro, F. R., ...
Chemical evolution models are presented for the anomalous globular cluster Omega Centauri. After demonstrating that the chemical features of Omega Cen can not be reproduced in the framework of the...
Monaco, L., Bellazzini, M., Bonifacio, P., Buzzoni, A., Ferraro, F. R., Marconi, G., ...
Context. The Sagittarius (Sgr) dwarf spheroidal galaxy is currently being disrupted under the strain of the Milky Way. A reliable reconstruction of Sgr star formation history can only be obtained by...
Deep FORS1 observations of the double Main Sequence of omega Centauri (2006)
Sollima, A., Ferraro, F. R., Bellazzini, M., Origlia, L., Straniero, O., Pancino, E.
We present the results of a deep photometric survey performed with FORS1@VLT aimed at investigating the complex Main Sequence structure of the stellar system omega Centauri. We confirm the presence...
ACS photometry of the globular cluster B514 (2006)
Galleti, S., Federici, L., Bellazzini, M., Buzzoni, A., Pecci, F. Fusi
We present deep F606W, F814W ACS photometry of the recently discovered globular cluster B514, the outermost known globular in the M31 galaxy. The cluster appears quite extended and member stars are...
Detection of a population gradient in the Sagittarius Stream (2006)
Bellazzini, M., Newberg, H. J., Correnti, M., Ferraro, F. R., Monaco, L.
We present a quantitative comparison between the Horizontal Branch morphology in the core of the Sagittarius dwarf spheroidal galaxy (Sgr) and in a wide field sampling a portion of its tidal stream...
Galleti, S., Federici, L., Bellazzini, M., Buzzoni, A., Pecci, F. Fusi
Aims - We present the first results of a large spectroscopic survey of globular clusters and candidate globular clusters in the nearby M~31 galaxy. The survey is aimed at the classification of known...
Martin, N. F., Irwin, M. J., Ibata, R. A., Conn, B. C., Lewis, G. F., Bellazzini, M., ...
As part of our radial velocity survey of low Galactic latitude structures that surround the Galactic disc, we report the detection of the so called Monoceros Ring in the foreground of the Carina...
Bellazzini, M., Correnti, M., Ferraro, F. R., Monaco, L., Montegriffo, P.
We present a statistically decontaminated Color Magnitude Diagram of a 1 deg X 1 deg field in the core of the Sagittarius dSph galaxy. Coupling this CMD with the most recent metallicity distributions...
The pure non-collisional Blue Straggler population in the giant stellar system omega Centauri (2005)
Ferraro, F. R., Sollima, A., Rood, R. T., Origlia, L., Pancino, E., Bellazzini, M.
We have used high spatial resolution data from the Hubble Space Telescope and wide-field ground-based observations to search for blue straggler stars (BSS) over the entire radial extent of the large...
Metallicities, relative ages and kinematics of stellar populations in omega Centauri (2005)
Sollima, A., Pancino, E., Ferraro, F. R., Bellazzini, M., Straniero, O., Pasquini, L.
We present results of an extensive spectroscopic survey of Subgiant stars in the stellar system omega Centauri. Using infrared CaII triplet lines, we derived metallicities and radial velocities for...
Monaco, L., Bellazzini, M., Bonifacio, P., Ferraro, F. R., Marconi, G., Pancino, E., ...
We present iron and $\alpha$ element (Mg, Ca, Ti) abundances for a sample of 15 Red Giant Branch stars belonging to the main body of the Sagittarius dwarf Spheroidal galaxy. Abundances have been...
A helium spread among the main sequence stars in NGC 2808 (2005)
D'Antona, F., Bellazzini, M., Caloi, V., Pecci, F. Fusi, Galleti, S., Rood, R. T.
We studied the color distribution of the main sequence of the Globular Cluster NGC 2808, based on new deep HST-WFPC2 photometry of a field in the uncrowded outskirts of the cluster. The color...
The core of the Canis Major galaxy as traced by Red Clump stars (2005)
Bellazzini, M., Ibata, R., Martin, N., Lewis, G. F., Conn, B., Irwin, M. J.
The recently-discovered stellar system in Canis Major is analysed using He-burning Red Clump stars as tracers. Canis Major turns out to be the strongest and most spatially confined overdensity of the...
Martin, N. F., Ibata, R. A., Conn, B. C., Lewis, G. F., Bellazzini, M., Irwin, M. J.
As part of a radial velocity survey of low Galactic latitude structures that we undertook with the 2dF spectrograph on the AAT, we present the radial velocities of more than 1500 Red Giant Branch and...
The Red Giant Branch Tip and Bump of the Leo II dwarf spheroidal galaxy (2005)
Bellazzini, M., Gennari, N., Ferraro, F. R.
We present V and I photometry of a 9.4' X 9.4' field centered on the dwarf spheroidal galaxy Leo II. The Tip of the Red Giant Branch is identified at I^{TRGB}=17.83 +/- 0.03 and adopting = -1.53 +/-...
The outermost cluster of M31 (2005)
Galleti, S., Bellazzini, M., Federici, L., Pecci, F. Fusi
We report on the identification of a new cluster in the far halo of the M31 galaxy. The cluster, named Bologna 514 (B514) has an integrated magnitude M_V=-8.5 +- 0.6, and a radial velocity, as...
Massive young clusters in the disc of M31 (2005)
Pecci, F. Fusi, Bellazzini, M., Buzzoni, A., De Simone, E., Federici, L., Galleti, S.
We have studied the properties of a sample of 67 very blue and likely young massive clusters in M31 extracted from the Bologna Revised Catalog of globular clusters, selected according to their color...
Discovery of a stellar system in the background of 47 Tucanae (2005)
Bellazzini, M., Pancino, E., Ferraro, F. R.
We report on the discovery of a stellar system in the background of the Galactic globular cluster 47 Tucanae (NGC 104), located 14.8' North-West of the cluster center. The object, whose apparent...
On the discrete nature of the Red Giant Branch of omega Centauri (2004)
Sollima, A., Ferraro, F. R., Pancino, E., Bellazzini, M.
We report the results of an extensive VLT high-resolution imaging campaign of the central region of the giant globular cluster omega Centauri. More than 100,000 stars have been measured in the inner...
The central density cusp of the Sagittarius dwarf spheroidal galaxy (2004)
Monaco, L., Bellazzini, M., Ferraro, F. R., Pancino, E.
We present an analysis of the density profile in the central region of the Sagittarius dwarf spheroidal galaxy. A strong density enhancement of Sgr stars is observed. The position of the peak of the...
The distance to the Leo I dwarf spheroidal galaxy from the Red Giant Branch Tip (2004)
Bellazzini, M., Gennari, N., Ferraro, F. R., Sollima, A.
We present V and I photometry of a 9.4 arcmin X 9.4 arcmin field centered on the dwarf spheroidal galaxy Leo I. The I magnitude of the tip of the Red Giant Branch is robustly estimated from two...
Martin, N. F., Ibata, R. A., Conn, B. C., Lewis, G. F., Bellazzini, M., Irwin, M. J., ...
In response to criticism by Momany et al. (2004), that the recently-identified Canis Major (CMa) overdensity could be simply explained by the Galactic warp, we present proof of the existence of a...
The distance to the Sgr dwarf spheroidal galaxy from the Red Giant Branch Tip (2004)
Monaco, L., Bellazzini, M., Ferraro, F. R., Pancino, E.
We derived the distance to the central region of the Sagittarius dwarf spheroidal galaxy from the Red Giant Branch Tip. The obtained distance modulus is $(m-M)_0=17.10\pm0.15$, corresponding to a...
The distance of M33 and the stellar population in its outskirts (2004)
Galleti, S., Bellazzini, M., Ferraro, F. R.
We present deep V,I photometry of two $9.4' x 9.4' field in the outer regions of the M33 galaxy. We obtain a robust detection of the luminosity of the Red Giant Branch Tip (I{TRGB}=20.72 +- 0.08)...
Bellazzini, M., Ferraro, F. R., Sollima, A., Pancino, E., Origlia, L.
New empirical calibrations of the Red Giant Branch Tip in the I,J,H and K bands based on two fundamental pillars, namely omega Centauri and 47 Tucanae, have been obtained by using a large optical and...
IR photometric properties of Red Giants in omega Cen (2004)
Sollima, A., Ferraro, F. R., Origlia, L., Pancino, E., Bellazzini, M.
We present a near-infrared J and K photometric catalog containing more than 73,000 stars in the central region of the giant Globular Cluster omega Centauri. This is the largest IR data-set ever...
Discovery of an anomalous Sub Giant Branch in the Color Magnitude Diagram of omega Centauri (2004)
Ferraro, F. R., Sollima, A., Pancino, E., Bellazzini, M., Straniero, O., Origlia, L., ...
Using deep high-resolution multi-band images taken with the Very Large Telescope and the Hubble Space Telescope, we discovered a new anomalous sequence in the Color Magnitude Diagram of omega Cen....
Galleti, S., Federici, L., Bellazzini, M., Pecci, F. Fusi, Macrina, S.
We have identified in the 2MASS database 693 known and candidate globular clusters in M31. The 2MASS J,H,K magnitudes of these objects have been transformed to the same homogeneous photometric system...
Bellazzini, M., Ibata, R., Monaco, L., Martin, N., Irwin, M. J., Lewis, G. F.
We report on the detection of Main Sequence stars belonging to the recently identified Canis Major galaxy in a field located at ~ 4.2 deg from the center of the stellar system. With Main Sequence...
A dwarf galaxy remnant in Canis Major: the fossil of an in-plane accretion onto the Milky Way (2003)
Martin, N. F., Ibata, R. A., Bellazzini, M., Irwin, M. J., Lewis, G. F., Dehnen, W.
We present an analysis of the asymmetries in the population of Galactic M-giant stars present in the 2MASS All Sky catalogue. Several large-scale asymmetries are detected, the most significant of...
Globular Clusters in the Sgr Stream and other structures (2003)
Bellazzini, M., Ibata, R., Ferraro, F. R
The possible association of Galactic globular clusters with the Sgr Stream is shortly reviewed at the light of the most recent observations of the Stream. >= 20 % of the Galactic globular clusters...
Pancino, E., Seleznev, A., Ferraro, F. R., Bellazzini, M., Piotto, G.
We present a detailed analysis of the spatial distribution of the stellar populations in the Galactic globular cluster omega Centauri. Taking advantage of the large photometric catalog published by...
Building up the Galactic Halo: The Sagittarius dSph and the globular cluster M22 (2003)
Monaco, L., Ferraro, F. R., Bellazzini, M., Pancino, E.
The Sagittarius dwarf spheroidal (Sgr) and a few paculiar Galactic Globular Clusters (GGC) can be considered as building blocks of theGalactic Halo. We present a series of results based on a wide...
A near-infrared spectroscopic screening of the red giant populations in omega Centauri (2003)
Origlia, L., Ferraro, F. R., Bellazzini, M., Pancino, E.
Near-infrared spectra of 21 giants in omega Centauri, spanning the whole range of metallicities observed in this cluster, are presented. This work is part of a coordinated photometric and...
Bellazzini, M., Cacciari, C., Federici, L., Pecci, F. Fusi, Rich, R. M.
HST-WFPC2 F555W and F814W photometry were obtained for 16 fields of the luminous nearby spiral galaxy M31, sampling the stellar content of the disk and the halo at different distances from the...
The Draco and Ursa Minor dwarf spheroidals. A comparative study (2002)
Bellazzini, M., Ferraro, F. R., Origlia, L., Pancino, E., Monaco, L., Oliva, E.
We present (V,I) photometry of two wide (~25 X 25 arcmin^2) fields centered on the low surface brightness dwarf spheroidal galaxies Draco and Ursa Minor. New estimates of the distance to these...
First detection of the RGB-bump in the Sagittarius dSph (2002)
Monaco, L., Ferraro, F. R., Bellazzini, M., Pancino, E.
We present V, I photometry of the Sagittarius Dwarf Spheroidal galaxy (Sgr) for a region of ~ 1^{circ} times 1^{circ}, centered on the globular cluster M 54. This catalog is the largest database of...
Discovery of an accreted stellar system within the globular cluster omega Centauri (2002)
Ferraro, F. R., Bellazzini, M., Pancino, E.
Recent wide-field photometric surveys (Lee et al.; Pancino et al.) have shown the existence of a previously unknown metal-rich ([Fe/H] -0.6) stellar population in the galactic globular cluster omega...
Pancino, E., Pasquini, L., Hill, V., Ferraro, F. R., Bellazzini, M.
We have obtained high-resolution, high S/N spectra for six red giants in omega Cen: three belonging to the recently discovered, metal-rich Red Giant Branch (RGB-a, Pancino et al. 2000) and three to...
Deep HST-WFPC2 photometry of NGC 288. II. The Main Sequence Luminosity Function (2002)
Bellazzini, M., Pecci, Flavio Fusi, Montegriffo, Paolo, Messineo, Maria, Monaco, L., Rood, R. T.
The Main Sequence Luminosity Function (LF) of the Galactic globular cluster NGC 288 has been obtained using deep WFPC2 photometry. We have employed a new method to correct for completeness and fully...
Deep HST-WFPC2 photometry of NGC 288. I. Binary Systems and Blue Stragglers (2001)
Bellazzini, M., Pecci, F. Fusi, Messineo, M., Monaco, L., Rood, R. T.
We present the first results of a deep WFPC2 photometric survey of the loose galactic globular cluster NGC 288. The fraction of binary systems is estimated from the color distribution of objects near...
The Bologna Key Project on Omega Cen (2001)
Ferraro, F. R., Pancino, E., Bellazzini, M.
In this contribution we schematically summarize a number of ongoing, coordinated spectro-photometric projects devoted to the study of the stellar population properties in Omega Cen. All of these...
Wide Field Imaging of the Sextans Dwarf Spheroidal Galaxy (2001)
Pancino, E., Bellazzini, M., Ferraro, F. R.
We present wide field multiband photometry of the very low surface brightness dwarf Spheroidal galaxy (dSph) Sextans. We have found convincing evidence for the presence of multiple stellar...
Age as the Second Parameter in NGC 288/NGC 362? II. The Horizontal Branch Revisited (2001)
Catelan, M., Bellazzini, M., Landsman, W. B., Ferraro, F. R., Pecci, F. Fusi, Galleti, S.
We revisit the "second parameter" pair of globular clusters NGC 288/NGC 362 on the basis of theoretical models for red giant branch (RGB) and horizontal branch (HB) stars. The results of the most...
Bellazzini, M., Pecci, F. Fusi, Ferraro, F. R., Galleti, S., Catelan, Marcio, Landsman, W. B.
We present deep V,I photometry of the globular clusters NGC 288, NGC 362 and NGC 1851 obtained during a single observational run under strictly homogeneous conditions. We use the bimodal horizontal...
Multiple stellar population in the Sextans dwarf spheroidal galaxy? (2001)
Bellazzini, M., Ferraro, F. R., Pancino, E.
We present wide field (33 X 34 arcmin^2) multiband (BVI) CCD photometry (down to I
RR Lyrae Variables in the Globular Clusters of M31: a First Detection of Likely Candidates (2001)
Clementini, G., Federici, L., Corsi, C. E., Cacciari, C., Bellazzini, M., Smith, H. A.
The purpose of this paper is to show that RR Lyrae variables exist and can be detected in M31 globular clusters. We report on the first tentative identification of RR Lyrae candidates in four...
A Survey of M31 Globular Clusters using WFPC2 on board HST (2001)
Rich, R. M., Corsi, C. E., Bellazzini, M., Federici, L., Cacciari, C., Pecci, F. Fusi
We report new, as yet unpublished HST/WFPC2 V, I photometry of 9 globular clusters in M31. These are part of a total sample of 19 clusters on M31 with well observed CMDs from HST. The clusters have...
The Resolved Stellar Populations in NGC 1705 (2001)
Tosi, M., Sabbi, E., Bellazzini, M., Aloisi, A., Greggio, L., Leitherer, C., ...
We present HST photometry of the resolved stellar population in the dwarf irregular galaxy NGC 1705. The galaxy has been observed with both WFPC2 and NICMOS, and successful images have been obtained...
A step toward the calibration of the RGB Tip as a Standard Candle (2001)
Bellazzini, M., Ferraro, F. R., Pancino, E.
The absolute I magnitude of the Tip of the Red Giant Branch M_I(TRGB) is one of the most promising Standard Candles actually used in astrophysics as a fundamental pillar for the Cosmological Distance...
New evidence for the complex struscture of the RGB of Omega Cen (2000)
Pancino, E., Ferraro, F. R., Bellazzini, M., Piotto, G., Zoccali, M.
We report on the complex structure of the red giant branch (RGB) of omega Cen, based on a new wide field and wide color baseline B and I photometry. Our color magnitude diagram (CMD) shows the...
We report on new WFPC2 observations of the globular cluster NGC 288, focusing our attention on peculiar stars. A very pronounced binary sequence, paralleling the ordinary Main Sequence (MS) is...
Bellazzini, M., Ferraro, F. R., Buonanno, R.
We present first results of a large photometric survey devoted to study the star formation history of the Sagittarius dwarf spheroidal galaxy (Sgr dSph). Three wide strips (9 X 35 arcmin^2) located...
Bellazzini, M., Ferraro, F. R., Buonanno, R.
The main characteristics of a wide photometric survey of the Sgr dwarf spheroidal galaxy are shortly presented. V and I photometry has been obtained for ~ 90000 stars toward Sgr and for ~ 9000 stars...
The Globular Cluster System of the Sagittarius Dwarf Spheroidal Galaxy: The age of Terzan 8 (1997)
Montegriffo, P., Bellazzini, M., Ferraro, F., Sarajedini, A., Martins, D., Sarajedini, A., ...
We present deep V,I CCD photometry of the globular cluster Terzan 8, recently found to be a member of the globular cluster system of the Sagittarius dwarf spheroidal galaxy. We accurately estimate...
Buonanno, R., Corsi, C., Bellazzini, M., Ferraro, F. R., Pecci, F. Fusi
The Horizontal Branch (HB) morphology in the color -- magnitude diagram of the Galactic globular clusters depends on many factors, and it is now firmly established that the so-called Second Parameter...
Horizontal Branch Morphology and the 2nd Parameter Problem (1996)
Pecci, F. Fusi, Bellazzini, M., Ferraro, F. R., Buonanno, R., Corsi, C.
We review the most outstanding issues related to the study of the morphology of the Horizontal Branch (HB) in the Color-Magnitude Diagrams of Galactic Globular Clusters and its use as age indicator....
Dynamical Families in the Galacti Globular Cluster System (1995)
Bellazzini, M., Vesperini, E., Pecci, F. Fusi, Ferraro, F. R.
The Halo Galactic Globular Clusters (GCs) lying inside the solar circle (\inn, \r $< 8 Kpc$, \feh$-0.8$). We present here both observational evidences and theoretical simulations supporting the...
Environmental effects on the structure of the Dwarf Spheroidal Galaxies (1995)
Bellazzini, M., Pecci, F. Fusi, Ferraro, F. R.
The central surface brightness ($\mu_V(0)$) of the dwarf spheroidal satellites of our own Galaxy is found to correlate with their distance from the Galactic Center ($R_{GC}$). This observational...
Pecci, F. Fusi, Bellazzini, M., Cacciari, C., Ferraro, F. R.
The small group of Galactic Globular Clusters (GGC) (Pal 12, Terzan 7, Ruprecht 106, Arp 2) recently discovered to be significantly younger (by ~3-4 Gyr) than the average cluster population of the...
Low Mass X-Ray Binaries in Globular Clusters: A New Metallicity Effect (1994)
Bellazzini, M., Pasquali, A., Federici, L., Ferraro, F. R., Pecci, F. Fusi
Galactic Globular Clusters (GCs) containing bright X sources (L_x > 10^{36} erg/s), commonly associated with Low Mass X-Ray Binaries (LMXBs), are found to be significantly denser and more metal-rich...
Blue Stragglers in Galactic Globular Clusters: Playing with Specific Quantities (1994)
Ferraro, F. R., Pecci, F. Fusi, Bellazzini, M.
We present preliminary results obtained from the comparison of the specific frequencies of Blue Straggler Stars (BSS) detected so far in a sample of 26 Galactic globular clusters. The number of BSS...