Zobrazeno 1 - 10
of 15 867
pro vyhledávání: '"Jang, S."'
Autor:
White, B. D., Huang, K., Fipps, I. L., Hamlin, J. J., Jang, S., Smith, G. J., Xia, B., Simonson, J. W., Nelson, C. S., Aronson, M. C., Maple, M. B.
We report measurements of magnetization, specific heat, and thermal expansion performed on As-deficient MnAs single crystals (MnAs$_{0.968}$). Ferromagnetic order is observed near $T_C \simeq$ 306 K on warming and $T_C \simeq$ 302 K on cooling, which
Externí odkaz:
http://arxiv.org/abs/2408.07781
Autor:
Lagioia, E. P., Milone, A. P., Legnardi, M. V., Cordoni, G., Dondoglio, E., Renzini, A., Tailo, M., Ziliotto, T., Carlos, M., Jang, S., Marino, A. F., Mohandasan, A., Qi, J., Rangwal, G., Bortolan, E., Muratore, F.
The pseudo two-color diagram, known as chromosome map (ChM), is a valuable tool for identifying globular clusters (GCs) that consist of single or multiple stellar populations (MPs). Recent surveys of Galactic GCs using the ChM have provided stringent
Externí odkaz:
http://arxiv.org/abs/2406.16824
Autor:
Marino, A. F., Milone, A. P., Renzini, A., Dondoglio, E., Bortolan, E., Carlos, M. G., Cordoni, G., Dotter, A., Jang, S., Lagioia, E. P., Legnardi, M. V., Muratore, F., Mohandasan, A., Tailo, M., Ziliotto, T.
We present the first spectroscopic estimates of the chemical abundance of M dwarf stars in a globular cluster (GC), namely 47 Tucanae. By exploiting NIRSpec on board the James Webb Space Telescope (JWST) we gathered low-resolution spectra for 28 star
Externí odkaz:
http://arxiv.org/abs/2406.12684
Autor:
Mehta, V. J., Milone, A. P., Casagrande, L., Marino, A. F., Legnardi, M. V., Cordoni, G., Dondoglio, E., Jang, S., Ziliotto, T., Barbieri, M., Bernizzoni, M., Bortolan, E., Sanchez, A. Bouras Moreno, Lagioia, E. P., Lionetto, S., Mohandasan, A., Muratore, F.
Understanding the formation of multiple populations in globular clusters (GCs) represents a challenge for stellar population studies. Nevertheless, the outermost cluster regions, likely to hold clues about the initial configuration of GC stars, remai
Externí odkaz:
http://arxiv.org/abs/2406.02755
Autor:
Legnardi, M. V., Milone, A. P., Cordoni, G., Marino, A. F., Dondoglio, E., Jang, S., Lagioia, E. P., Muratore, F., Ziliotto, T., Bortolan, E., Mohandasan, A.
Publikováno v:
A&A 687, A160 (2024)
Globular cluster (GC) stars composed of pristine material (first-generation, 1G, stars) are not chemically homogeneous, as they exhibit extended sequences in the "Chromosome Map" (ChM). Recent studies characterized 1G stars within the center of 55 Ga
Externí odkaz:
http://arxiv.org/abs/2405.02006
Autor:
Marino, A. F., Milone, A. P., Legnardi, M. V., Renzini, A., Dondoglio, E., Cavecchi, Y., Cordoni, G., Dotter, A., Lagioia, E. P., Ziliotto, T., Bernizzoni, M., Bortolan, E., Carlos, M. G., Jang, S., Mohandasan, A., Muratore, F., Tailo, M.
The James Webb Space Telescope (JWST) observations have been demonstrated to be efficient in detecting globular clusters' (GCs) multiple stellar populations in the low mass regime of M dwarfs. We present an overview, and first results, of different p
Externí odkaz:
http://arxiv.org/abs/2401.06681
Autor:
Dondoglio, E., Milone, A. P., Marino, A. F., D'Antona, F., Cordoni, G., Legnardi, M. V., Lagioia, E. P., Jang, S., Ziliotto, T., Carlos, M., Dell'Agli, F., Karakas, A., Mohandasan, A., Osborn, Z., Tailo, M., Ventura, P.
About one-fifth of the Galactic globular clusters (GCs), dubbed Type II GCs, host distinct stellar populations with different heavy elements abundances. NGC 1851 is one of the most studied Type II GCs, surrounded by several controversies regarding th
Externí odkaz:
http://arxiv.org/abs/2309.16423
Autor:
Legnardi, M. V., Milone, A. P., Cordoni, G., Lagioia, E. P., Dondoglio, E., Marino, A. F., Jang, S., Mohandasan, A., Ziliotto, T.
The presence of differential reddening in the direction of Galactic globular clusters (GCs) has proven to be a serious limitation in the traditional colour-magnitude diagram (CMD) analysis. Here, we estimate local reddening variations in the directio
Externí odkaz:
http://arxiv.org/abs/2304.05076
Autor:
Milone, A. P., Marino, A. F., Dotter, A., Ziliotto, T., Dondoglio, E., Cordoni, G., Jang, S., Lagioia, E. P., Legnardi, M. V., Mohandasan, A., Tailo, M., Yong, D., Baimukhametova, S., Carlos, M.
We use images collected with the near-infrared camera (NIRCam) on board the James Webb Space Telescope and with the Hubble Space Telescope (HST) to investigate multiple populations at the bottom of the main sequence (MS) of 47 Tucanae. The F115W vs.
Externí odkaz:
http://arxiv.org/abs/2301.10889
Autor:
Milone, A. P., Cordoni, G., Marino, A. F., D'Antona, F., Bellini, A., Di Criscienzo, M., Dondoglio, E., Lagioia, E. P., Langer, N., Legnardi, M. V., Libralato, M., Baumgardt, H., Bettinelli, M., Cavecchi, Y., de Grijs, R., Deng, L., Hastings, B., Li, C., Mohandasan, A., Renzini, A., Vesperini, E., Wang, C., Ziliotto, T., Carlos, M., Costa, G., Dell'Agli, F., Di Stefano, S., Jang, S., Martorano, M., Simioni, M., Tailo, M., Ventura, P.
Publikováno v:
A&A 672, A161 (2023)
In the past years, we have undertaken an extensive investigation of LMC and SMC star clusters based on HST data. We present photometry and astrometry of stars in 101 fields observed with the WFC/ACS, UVIS/WFC3 and NIR/WFC3 cameras. These fields compr
Externí odkaz:
http://arxiv.org/abs/2212.07978