Zobrazeno 1 - 10
of 172
pro vyhledávání: '"Andrés E. Piatti"'
Autor:
Andrés E. Piatti
Publikováno v:
The Astronomical Journal, Vol 167, Iss 6, p 279 (2024)
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 4 m Blanco telescope of the Cerro-Tololo Interamerican Observatory. We
Externí odkaz:
https://doaj.org/article/cd2255c67b724be5959c6b4443ebc3d7
Autor:
Andrés E. Piatti, Yutaka Hirai
Publikováno v:
The Astronomical Journal, Vol 165, Iss 5, p 213 (2023)
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:
https://doaj.org/article/0a0e596883ae4345b917655048c32034
Autor:
Andrés E Piatti, Denis M F Illesca, Agustina A Massara, Matías Chiarpotti, Daiana Roldán, Micaela Morón, Fabrizio Bazzoni
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 518:6216-6222
We report results on the analysis of eleven new Milky Way open cluster candidates, recently discovered from the detection of stellar overdensities in the Vector Point diagram, by employing extreme deconvolution Gaussian mixture models. We treated the
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::52ac1e6001c48b7682d01c57d45b003d
https://doi.org/10.1093/mnras/stac3479
https://doi.org/10.1093/mnras/stac3479
Autor:
Andrés E Piatti, Scott Lucchini
Publikováno v:
Monthly Notices of the Royal Astronomical Society. 515:4005-4012
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:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::27dfa07faec6976f6703718c83155d94
https://doi.org/10.1093/mnras/stac1980
https://doi.org/10.1093/mnras/stac1980
Autor:
Andrés E Piatti
Publikováno v:
Monthly Notices of the Royal Astronomical Society: Letters. 511:L72-L76
We confirm the existence of a second Large Magellanic Cloud (LMC) star cluster, KMHK 1592, with an age that falls in the middle of the so-called LMC star cluster age gap, a long period of time (~ 4 - 11 Gyr) where no star cluster had been uncovered,
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::aa1c91f8f7550ffb95e14dddd25f48bb
https://doi.org/10.1093/mnrasl/slac010
https://doi.org/10.1093/mnrasl/slac010
Autor:
Andrés E Piatti
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:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::62466773103c4d0ec6cea4ee8ea5ff74
Autor:
Andrés E Piatti, Khyati Malhan
Publikováno v:
Monthly Notices of the Royal Astronomical Society: Letters. 511:L1-L7
We report the first evidence of an on-going collision between two star clusters in our Galaxy, namely IC 4665 and Collinder 350. These are open clusters located at a distance of ~330 pc from the Sun and ~100 pc above the Galactic plane, and they both
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::cc2605dc9a705f6f1a708c17e7bc9d15
https://doi.org/10.1093/mnrasl/slab130
https://doi.org/10.1093/mnrasl/slab130
Autor:
Andrés E Piatti
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:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::e5e3f666f3bac00ee722c4d101d7e1a0
http://arxiv.org/abs/2205.02165
http://arxiv.org/abs/2205.02165
Autor:
Andrés E. Piatti
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:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::f284e39f6686591577c72687e0f1122f
Autor:
Andrés E. Piatti
Recently, new Sagittarius (Sgr) dwarf galaxy globular clusters were discovered, which opens the question on the actual size of the Sgr globular cluster population, and therefore on our understanding of the Sgr galaxy formation and accretion history o
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::fc8d0a3cd76d4719f64479abc9ce1c7f
http://arxiv.org/abs/2109.06731
http://arxiv.org/abs/2109.06731