Zobrazeno 1 - 10
of 43
pro vyhledávání: '"Grocholski, Aaron J."'
Autor:
Gilligan, Christina K., Chaboyer, Brian, Cummings, Jeffrey D., Mackey, Dougal, Cohen, Roger E., Geisler, Douglas, Grocholski, Aaron J., Parisi, M. C., Sarajedini, Ata, Ventura, Paolo, Villanova, Sandro, Yang, Soung-Chul
We examine four ancient Large Magellanic Cloud (LMC) globular clusters (GCs) for evidence of multiple stellar populations using the Advanced Camera for Surveys and Wide Field Camera 3 on the Hubble Space Telescope Programme GO-14164. NGC 1466, NGC 18
Externí odkaz:
http://arxiv.org/abs/2003.09473
Autor:
Gilligan, Christina K., Chaboyer, Brian, Cummings, Jeffrey D., Mackey, Dougal, Cohen, Roger E., Geisler, Doug, Grocholski, Aaron J., Parisi, M. C., Sarajedini, Ata, Ventura, Paolo, Villanova, Sandro, Yang, Soung-Chul, Wagner-Kaiser, Rachel
We present a multiple population search in two old Large Magellanic Cloud (LMC) Globular Clusters, Hodge 11 and NGC 2210. This work uses data from the Advanced Camera for Surveys and Wide Field Camera 3 on the Hubble Space Telescope from programme GO
Externí odkaz:
http://arxiv.org/abs/1904.01434
Autor:
Wagner-Kaiser, R., Mackey, Dougal, Sarajedini, Ata, Cohen, Roger E., Geisler, Doug, Yang, Soung-Chul, Grocholski, Aaron J., Cummings, Jeffrey D.
We leverage new high-quality data from Hubble Space Telescope program GO-14164 to explore the variation in horizontal branch morphology among globular clusters in the Large Magellanic Cloud (LMC). Our new observations lead to photometry with a precis
Externí odkaz:
http://arxiv.org/abs/1801.00006
Autor:
Wagner-Kaiser, R., Mackey, Dougal, Sarajedini, Ata, Chaboyer, Brian, Cohen, Roger E., Yang, Soung-Chul, Cummings, Jeffrey D., Geisler, Doug, Grocholski, Aaron J.
We analyze Hubble Space Telescope observations of six globular clusters in the Large Magellanic Cloud from program GO-14164 in Cycle 23. These are the deepest available observations of the LMC globular cluster population; their uniformity facilitates
Externí odkaz:
http://arxiv.org/abs/1707.01571
Autor:
Grocholski, Aaron J., van der Marel, Roeland P., Aloisi, Alessandra, Annibali, Francesca, Greggio, Laura, Tosi, Monica
(abridged) We used HST/ACS to obtain deep V- and I-band images of NGC 1569, one of the closest and strongest starburst galaxies in the Universe. These data allowed us to study the underlying old stellar population, aimed at understanding NGC 1569's e
Externí odkaz:
http://arxiv.org/abs/1204.0989
Autor:
Ryś, Agnieszka, Grocholski, Aaron J., van der Marel, Roeland P., Aloisi, Alessandra, Annibali, Francesca
[abridged] Aims. We observed the outer parts of NGC 1569 and NGC 4449, two of the closest and strongest dwarf starburst galaxies in the local universe, to characterize their stellar density and populations, and obtain new insights into the structure,
Externí odkaz:
http://arxiv.org/abs/1104.0899
Autor:
Grocholski, Aaron J., Aloisi, Alessandra, van der Marel, Roeland P., Mack, Jennifer, Annibali, Francesca, Angeretti, Luca, Greggio, Laura, Held, Enrico V., Romano, Donatella, Sirianni, Marco, Tosi, Monica
We present deep HST ACS/WFC photometry of the dwarf irregular galaxy NGC 1569, one of the closest and strongest nearby starburst galaxies. These data allow us, for the first time, to unequivocally detect the tip of the red giant branch and thereby de
Externí odkaz:
http://arxiv.org/abs/0808.0153
WIYN Open Cluster Study XVI: Optical/Infrared Photometry and Comparisons With Theoretical Isochrones
Autor:
Grocholski, Aaron J., Sarajedini, Ata
Publikováno v:
Mon.Not.Roy.Astron.Soc.345:1015,2003
We present combined optical/near-IR photometry (BVIK) for six open clusters - M35, M37, NGC 1817, NGC 2477, NGC 2420, and M67. The open clusters span an age range from 150 Myr to 4 Gyr and have metal abundances from [Fe/H] = -0.3 to +0.09 dex. We hav
Externí odkaz:
http://arxiv.org/abs/astro-ph/0307503
We present near-infrared color-magnitude diagrams for the LMC star clusters Hodge 4 and NGC 1651 revealing the helium burning red clump stars for the first time in the JK passbands. From these diagrams, which extend to K~19, and existing optical CMDs
Externí odkaz:
http://arxiv.org/abs/astro-ph/0207588
Autor:
Grocholski, Aaron J., Sarajedini, Ata
In an effort to improve the utility of the helium burning red clump luminosity as a distance indicator, we explore the sensitivity of the K-band red clump absolute magnitude Mk(RC) to metallicity and age. We rely upon JK photometry for 14 open cluste
Externí odkaz:
http://arxiv.org/abs/astro-ph/0112251