Zobrazeno 1 - 10
of 5 937
pro vyhledávání: '"A. Natta"'
Autor:
Claes, R. A. B., Campbell-White, J., Manara, C. F., Frasca, A., Natta, A., Alcalá, J. M., Armeni, A., Fang, M., Lovell, J. B., Stelzer, B., Venuti, L., Wyatt, M., Queitsch, A.
Studies of the stellar and accretion properties of classical T Tauri stars (CTTS) require comparison with photospheric spectral templates. Here we aim at expanding the currently available grid of wide-wavelength coverage observed spectra of non-accre
Externí odkaz:
http://arxiv.org/abs/2407.11866
Autor:
Almendros-Abad, V., Manara, C. F., Testi, L., Natta, A., Claes, R. A. B., Muzic, K., Sanchis, E., Alcalá, J. M., Bayo, A., Scholz, A.
The time evolution of the dependence of the mass accretion rate with the stellar mass and the disk mass represents a fundamental way to understand the evolution of protoplanetary disks and the formation of planets. In this work, we present observatio
Externí odkaz:
http://arxiv.org/abs/2402.10523
Autor:
Campbell-White, Justyn, Manara, Carlo F., Benisty, Myriam, Natta, Antonella, Claes, Rik A. B., Frasca, Antonio, Bae, Jaehan, Facchini, Stefano, Isella, Andrea, Pérez, Laura, Pinilla, Paola, Sicilia-Aguilar, Aurora, Teague, Richard
PDS 70 is so far the only young disc where multiple planets have been detected by direct imaging. The disc has a large cavity when seen at sub-mm and NIR wavelengths, which hosts two massive planets. This makes PDS 70 the ideal target to study the ph
Externí odkaz:
http://arxiv.org/abs/2308.09554
Publikováno v:
A&A 677, A64 (2023)
Classical T Tauri stars (cTTs) accrete from their circumstellar disk. The material falls onto the stellar surface, producing an accretion shock, which generates veiling in a star's spectra. In addition, the shock causes a localized accretion spot at
Externí odkaz:
http://arxiv.org/abs/2307.16561
Autor:
Scholz, Aleks, Muzic, Koraljka, Almendros-Abad, Victor, Natta, Antonella, Ruiz-Rodriguez, Dary, Cieza, Lucas, Rodriguez-Lopez, Cristina
Publikováno v:
Open Journal of Astrophysics, Vol. 7 2024
We report on a search for variability in the young brown dwarf SST1624 (~M7 spectral type, M~0.05Msol), previously found to feature an expanding gaseous shell and to undergo quasi-spherical mass loss. We find no variability on timescales of 1-6hours.
Externí odkaz:
http://arxiv.org/abs/2307.14087
Autor:
Curone, Pietro, Testi, Leonardo, Macias, Enrique, Tazzari, Marco, Facchini, Stefano, Williams, Jonathan P., Clarke, Cathie J., Natta, Antonella, Rosotti, Giovanni, Toci, Claudia, Lodato, Giuseppe
Publikováno v:
A&A 677, A118 (2023)
Protoplanetary disks emit radiation across a broad range of wavelengths, requiring a multiwavelength approach to fully understand their physical mechanisms and how they form planets. Observations at sub-millimeter to centimeter wavelengths can provid
Externí odkaz:
http://arxiv.org/abs/2307.10798
Autor:
Cacciapuoti, L., Macias, E., Maury, A. J., Chandler, C. J., Sakai, N., Tychoniec, Ł., Viti, S., Natta, A., De Simone, M., Miotello, A., Codella, C., Ceccarelli, C., Podio, L., Fedele, D., Johnstone, D., Shirley, Y., Liu, B. J., Bianchi, E., Zhang, Z. E., Pineda, J., Loinard, L., Ménard, F., Lebreuilly, U., Klessen, R. S., Hennebelle, P., Molinari, S., Testi, L., Yamamoto, S.
Publikováno v:
A&A 676, A4 (2023)
Early dust grain growth in protostellar envelopes infalling on young discs has been suggested in recent studies, supporting the hypothesis that dust particles start to agglomerate already during the Class 0/I phase of young stellar objects (YSOs). If
Externí odkaz:
http://arxiv.org/abs/2306.02852
Publikováno v:
A&A 668, A94 (2022)
The process of accretion in classical T Tauri stars (CTTSs) has been observed to vary on different timescales. Studying this variability is vital to understanding a star's evolution and provides insight into the complex processes at work within. Unde
Externí odkaz:
http://arxiv.org/abs/2210.14134
Autor:
Claes, R. A. B., Manara, C. F., Garcia-Lopez, R., Natta, A., Fang, M., Fockter, Z. P., Ábrahám, P., Alcalá, J. M., Campbell-White, J., Garatti, A. Caratti o, Covino, E., Fedele, D., Frasca, A., Gameiro, J. F., Herczeg, G. J., Kóspál, Á., Petr-Gotzens, M. G., Rosotti, G., Venuti, L., Zsidi, G.
Publikováno v:
A&A 664, L7 (2022)
The processes regulating protoplanetary disk evolution are constrained by studying how mass accretion rates scale with stellar and disk properties. The spread in these relations can be used as a constraint to the models of disk evolution, but only if
Externí odkaz:
http://arxiv.org/abs/2208.01447
Autor:
Gianluca NATTA, Samuele VOYRON, Erica LUMINI, Alex LAINI, Alfredo SANTOVITO, Angela ROGGERO, Claudia PALESTRINI, Antonio ROLANDO
Publikováno v:
European Journal of Entomology, Vol 121, Iss 1, Pp 40-53 (2024)
The gut microbiota of dung beetles comprises bacteria, archaea, and fungi. Most studies have only considered the bacterial element and focused on differences between species reared in the lab. This study considered microorganisms from the gut of Tryp
Externí odkaz:
https://doaj.org/article/a470acf3895a41f1a71cc3373d05b835