Zobrazeno 1 - 10
of 2 255
pro vyhledávání: '"Yong, D"'
Autor:
Marino, A. F., Milone, A. P., Dondoglio, E., Renzini, A., Cordoni, G., Jerjen, H., Karakas, A. I., Lagioia, E. P., Legnardi, M. V., McKenzie, M., Mohandasan, A., Tailo, M., Yong, D., Ziliotto, T.
The "chromosome maps" (ChMs) of globular clusters (GCs) have revealed that these ancient structures are not homogeneous in metallicity in various ways, and in different natures. The Type II GCs generally display larger variations, sometimes coupled w
Externí odkaz:
http://arxiv.org/abs/2311.01871
We investigate the distribution of the lithium abundances, A(Li), of metal-poor dwarf and subgiant stars within the limits 5500 K < Teff < 6700 K, -6.0 < [Fe/H] < -1.5, and logg > ~3.5 (a superset of parameters first adopted by Spite and Spite), usin
Externí odkaz:
http://arxiv.org/abs/2303.11497
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
Yes
Lysinibacillus fusiformis strain RB21 is a quorum-quenching bacterium that is able to degrade quorum-sensing signaling molecules. Here, we present the first complete genome sequence of L. fusiformis strain RB21. The finished genome is 4.8 Mb
Lysinibacillus fusiformis strain RB21 is a quorum-quenching bacterium that is able to degrade quorum-sensing signaling molecules. Here, we present the first complete genome sequence of L. fusiformis strain RB21. The finished genome is 4.8 Mb
Externí odkaz:
http://hdl.handle.net/10454/15108
Constraining the original composition of the gas forming first-generation stars in globular clusters
Autor:
Legnardi, M. V., Milone, A. P., Armillotta, L., Marino, A. F., Cordoni, G., Renzini, A., Vesperini, E., D'Antona, F., McKenzie, M., Yong, D., Dondoglio, E., Lagioia, E. P., Carlos, M., Tailo, M., Jang, S., Mohandasan, A.
Disentangling distinct stellar populations along the red-giant branches (RGBs) of Globular Clusters (GCs) is possible by using the pseudo two-color diagram dubbed chromosome map (ChM). One of the most intriguing findings is that the so-called first-g
Externí odkaz:
http://arxiv.org/abs/2203.07571
Autor:
Salgado, C., Da Costa, G. S., Yong, D., Salinas, R., Norris, J. E., Mackey, A. D., Marino, A. F., Milone, A. P.
Using spectra obtained with the VLT/FORS2 and Gemini-S/GMOS instruments we have investigated carbon, nitrogen and sodium abundances in a sample of red giants in the Small Magellanic Cloud cluster Kron 3. The metallicity and luminosity of this cluster
Externí odkaz:
http://arxiv.org/abs/2202.00849
Autor:
Yong, D., Da Costa, G. S., Bessell, M. S., Chiti, A., Frebel, A., Gao, X., Lind, K., Mackey, A. D., Marino, A. F., Murphy, S. J., Nordlander, T., Asplund, M., Casey, A. R., Kobayashi, C., Norris, J. E., Schmidt, B. P.
We present chemical abundances for 21 elements (from Li to Eu) in 150 metal-poor Galactic stars spanning $-$4.1 $<$ [Fe/H] $<$ $-$2.1. The targets were selected from the SkyMapper survey and include 90 objects with [Fe/H] $\le$ $-$3 of which some 15
Externí odkaz:
http://arxiv.org/abs/2107.06430
Autor:
Yong, D., Kobayashi, C., Da Costa, G. S., Bessell, M. S., Chiti, A., Frebel, A., Lind, K., Mackey, A. D., Nordlander, T., Asplund, M., Casey, A. R., Marino, A. F., Murphy, S. J., Schmidt, B. P.
Neutron-star mergers were recently confirmed as sites of rapid-neutron-capture (r-process) nucleosynthesis. However, in Galactic chemical evolution models, neutron-star mergers alone cannot reproduce the observed element abundance patterns of extreme
Externí odkaz:
http://arxiv.org/abs/2107.03010
Autor:
Marino, A. F., Milone, A. P., Renzini, A., Yong, D., Asplund, M., Da Costa, G. S., Jerjen, H., Cordoni, G., Carlos, M., Dondoglio, E., Lagioia, E. P., Jang, S., Tailo, M.
Recent work has revealed two classes of Globular Clusters (GCs), dubbed Type-I and Type-II. Type-II GCs are characterized by a blue- and a red- red giant branch composed of stars with different metallicities, often coupled with distinct abundances in
Externí odkaz:
http://arxiv.org/abs/2106.15978
Autor:
Cordoni, G., Da Costa, G. S., Yong, D., Mackey, A. D., Marino, A. F., Monty, S., Nordlander, T., Norris, J. E., Asplund, M., Bessell, M. S., Casey, A. R., Frebel, A., Lind, K., Murphy, S. J., Schmidt, B. P., Gao, X. D., Xylakis-Dornbusch, T., Amarsi, A. M., Milone, A. P.
In this work we combine spectroscopic information from the \textit{SkyMapper survey for Extremely Metal-Poor stars} and astrometry from Gaia DR2 to investigate the kinematics of a sample of 475 stars with a metallicity range of $ -6.5 \leq \rm [Fe/H]
Externí odkaz:
http://arxiv.org/abs/2011.01189