Zobrazeno 1 - 10
of 99
pro vyhledávání: '"Sestito F."'
Autor:
Sitnova, T. M., Yuan, Z., Matsuno, T., Mashonkina, L. I., Alexeeva, S. A., Holmbeck, E., Sestito, F., Lombardo, L., Banerjee, P., Martin, N. F., Jiang, F.
Dwarf galaxy streams encode vast amounts of information essential to understanding early galaxy formation and nucleosynthesis channels. Due to the variation in the timescales of star formation history in their progenitors, stellar streams serve as `s
Externí odkaz:
http://arxiv.org/abs/2408.16107
Autor:
Sitnova, T. M., Matsuno, T., Yuan, Z., Martin, N. F., Banerjee, P., Sestito, F., Venn, K. A., Hernández, J. I. González
We report the serendipitous discovery of a very metal-poor (VMP) Li-rich giant star ($T_{\rm eff}$ = 4690$\pm$80 K, log g = 1.34$\pm$0.13, [Fe/H] = $-2.43\pm$0.07). We analyse the Li I 6103 and 6707 \r{A} lines accounting for departures from local th
Externí odkaz:
http://arxiv.org/abs/2310.07907
Autor:
Mashonkina, L., Arentsen, A., Aguado, D. S., Smogorzhevskii, A., Hampel, M., Karakas, A., Sestito, F., Martin, N. F., Venn, K. A., Hernández, J. I. González
Well-studied very metal-poor (VMP, [Fe/H] < -2 ) stars in the inner Galaxy are few in number, and they are of special interest because they are expected to be among the oldest stars in the MilkyWay. We present high-resolution spectroscopic follow-up
Externí odkaz:
http://arxiv.org/abs/2305.10717
Autor:
Korcakova, D., Sestito, F., Manset, N., Kroupa, P., Votruba, V., Slechta, M., Danford, S., Dvorakova, N., Raj, A., Chojnowski, S. D., Singh, H. P.
Publikováno v:
A&A 659, A35 (2022)
We report the first detection of the magnetic field in a star of FS CMa type, a subgroup of objects characterized by the B[e] phenomenon. The split of magnetically sensitive lines in IRAS 17449+2320 determines the magnetic field modulus of 6.2+/-0.2
Externí odkaz:
http://arxiv.org/abs/2201.04645
Autor:
Lucchesi, R., Lardo, C., Jablonka, P., Sestito, F., Mashonkina, L., Arentsen, A., Suter, W., Venn, K., Martin, N., Starkenburg, E., Aguado, D., Hill, V., Kordopatis, G., Navarro, J. F., Hernández, J. I. González, Malhan, K., Yuan, Z.
We present a one-dimensional, local thermodynamic equilibrium (1D-LTE) homogeneous analysis of 132 stars observed at high-resolution with ESPaDOnS. This represents the largest sample observed at high resolution (R$\sim$40,000) from the Pristine surve
Externí odkaz:
http://arxiv.org/abs/2112.10792
Autor:
Lardo, C., Mashonkina, L., Jablonka, P., Bonifacio, P., Caffau, E., Aguado, D. S., Hernández, J. I. González, Sestito, F., Kielty, C. L., Venn, K. A., Hill, V., Starkenburg, E., Martin, N. F., Sitnova, T., Arentsen, A., Carlberg, R. G., Navarro, J. F., Kordopatis, G.
Elemental abundances of the most metal-poor stars reflect the conditions in the early Galaxy and the properties of the first stars. We present a spectroscopic follow-up of two ultra metal-poor stars ([Fe/H]<-4.0) identified by the survey {\em Pristin
Externí odkaz:
http://arxiv.org/abs/2109.14477
Autor:
Youakim, K., Starkenburg, E., Martin, N. F., Matijevic, G., Aguado, D. S., Prieto, C. Allende, Arentsen, A., Bonifacio, P., Carlberg, R. G., Hernández, J. I. González, Hill, V., Kordopatis, G., Lardo, C., Navarro, J. F., Jablonka, P., Janssen, R. Sánchez, Sestito, F., Thomas, G. F.
The Pristine survey uses narrow-band photometry to derive precise metallicities down to the extremely metal-poor regime ([Fe/H] < -3), and currently consists of over 4 million FGK-type stars over a sky area of $\sim 2~500\, \mathrm{deg}^2$. We focus
Externí odkaz:
http://arxiv.org/abs/2001.04988
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Autor:
Sitnova, T M, Matsuno, T, 珍), Z Yuan (袁, Martin, N F, Banerjee, P, Sestito, F, Venn, K A, González Hernández, J I
Publikováno v:
Monthly Notices of the Royal Astronomical Society; Dec2023, Vol. 526 Issue 4, p5976-5986, 11p
Akademický článek
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