Zobrazeno 1 - 10
of 213
pro vyhledávání: '"Piatti, Andrès E."'
Autor:
Piatti, Andrés E.
Since recent years, mass segregation driven by two-body relaxation in star clusters has been proposed to be measured by the so-called dynamical clock, $A^+$, a measure of the area enclosed between the cumulative radial distribution of blue straggler
Externí odkaz:
http://arxiv.org/abs/2409.16887
Autor:
Piatti, Andrés E.
We present results of the analysis of a set of images obtained in the field of the Milky Way bulge globular cluster NGC 6355 using the Dark Energy Camera, which is attached to the 4m Blanco telescope of the Cerro-Tololo Interamerican Observatory. We
Externí odkaz:
http://arxiv.org/abs/2405.01485
Autor:
Piatti, Andrés E.
The spatial metallicity distribution of star clusters in the Small Magellanic Cloud (SMC) has recently been found to correlate as a V-shaped function with the semi-major axis of an elliptical framework proposed to assume a projected galaxy flattening
Externí odkaz:
http://arxiv.org/abs/2309.05408
Autor:
Piatti, Andrés E.
The age distribution of the open cluster system is a key piece of information to decipher the star formation history of the Milky Way disk. Recently, a remarkable earlier drop of its older end was found, which caught our attention. Precisely, we anal
Externí odkaz:
http://arxiv.org/abs/2307.08512
Autor:
Piatti, Andrés E.
The tangential velocity dispersion of stars belonging to the Milky Way globular cluster's tidal tails has recently been found from N-body simulations to be a parameter that distinguishes between cored and cuspy profiles of low-mass dwarf galaxy dark
Externí odkaz:
http://arxiv.org/abs/2307.07419
Autor:
Piatti, Andrés E., Hirai, Yutaka
The ancient Large Magellanic Cloud (LMC) globular cluster NGC 2005 has recently been reported to have an ex-situ origin, thus, setting precedents that the LMC could have partially formed from smaller merged dwarf galaxies. We here provide additional
Externí odkaz:
http://arxiv.org/abs/2303.09259
Autor:
Piatti, Andrés E.
Theoretical models have suggested peculiar velocity dispersion profiles of star clusters facing dissolution. They predicted that, besides bound stars that still belong to the star cluster, and unbound ones already stripped off, there is an intermedia
Externí odkaz:
http://arxiv.org/abs/2301.04031
Autor:
Piatti, Andrés E.
I revisited the age of the Small Magellanic Cloud cluster HW 42, whose previous estimates differ in more than 6 Gyr, thus challenging the most updated knowledge of the SMC star formation history. I performed an analysis of number stellar density prof
Externí odkaz:
http://arxiv.org/abs/2212.08074
Autor:
Piatti, Andrés E., Lucchini, Scott
We present results on the recently discovered stellar system YMCA-1, for which physical nature and belonging to any of the Magellanic System galaxies have been irresolutely analyzed. We used SMASH and {\it Gaia} EDR3 data sets to conclude that we are
Externí odkaz:
http://arxiv.org/abs/2207.05034
Autor:
Piatti, Andrés E.
We study the outer regions of the Milky Way globular cluster NGC 7089 based on new Dark Energy Camera (DECam) observations. The resulting background cleaned stellar density profile reveals the existence of an extended envelope. We confirm previous re
Externí odkaz:
http://arxiv.org/abs/2205.02165