Zobrazeno 1 - 10
of 187
pro vyhledávání: '"Amarsi, A. M."'
Autor:
Buder, S., Kos, J., Wang, E. X., McKenzie, M., Howell, M., Martell, S. L., Hayden, M. R., Zucker, D. B., Nordlander, T., Montet, B. T., Traven, G., Bland-Hawthorn, J., De Silva, G. M., Freeman, K. C., Lewis, G. F., Lind, K., Sharma, S., Simpson, J. D., Stello, D., Zwitter, T., Amarsi, A. M., Armstrong, J. J., Banks, K., Beavis, M. A., Beeson, K., Chen, B., Ciucă, I., Da Costa, G. S., de Grijs, R., Martin, B., Nataf, D. M., Ness, M. K., Rains, A. D., Scarr, T., Vogrinčič, R., Wang, Z., Wittenmyer, R. A., Xie, Y., Collaboration, The GALAH
The stars of the Milky Way carry the chemical history of our Galaxy in their atmospheres as they journey through its vast expanse. Like barcodes, we can extract the chemical fingerprints of stars from high-resolution spectroscopy. The fourth data rel
Externí odkaz:
http://arxiv.org/abs/2409.19858
The present-day abundance of beryllium in the solar atmosphere provides clues about mixing mechanisms within stellar interiors. However, abundance determinations based on the Be II 313.107 nm line are prone to systematic errors due to imperfect model
Externí odkaz:
http://arxiv.org/abs/2408.13105
Autor:
Barklem, Paul S., Amarsi, Anish M.
Publikováno v:
A&A 689, A100 (2024)
The negative hydrogen ion H$^-$ is, almost without exception, treated in local thermodynamic equilibrium (LTE) in the modelling of F, G, and K stars, where it is the dominant opacity source in the visual spectral region. This assumption rests in prac
Externí odkaz:
http://arxiv.org/abs/2407.19833
Autor:
Bétrisey, Jérôme, Farnir, Martin, Breton, Sylvain N., García, Rafael A., Broomhall, Anne-Marie, Amarsi, Anish M., Kochukhov, Oleg
Publikováno v:
A&A 688, L17 (2024)
Building on the success of previous missions, asteroseismic modelling will play a key role in future space-based missions, such as PLATO, CubeSpec, and Roman. Despite remarkable achievements, asteroseismology has revealed significant discrepancies in
Externí odkaz:
http://arxiv.org/abs/2407.15655
Publikováno v:
A&A 688, A72 (2024)
Magnesium is one of the important elements in stellar physics as an electron donor and in Galactic Archaeology as a discriminator of different stellar populations. However, previous studies of Mg I and Mg II lines in metal-poor benchmark stars have f
Externí odkaz:
http://arxiv.org/abs/2405.13486
Autor:
Kochukhov, O., Amarsi, A. M., Lavail, A., Ruh, H. L., Hahlin, A., Hatzes, A., Nagel, E., Piskunov, N., Pouilly, K., Reiners, A., Rengel, M., Seemann, U., Shulyak, D.
Publikováno v:
A&A 689, A36 (2024)
The A-type metallic-line (Am) stars are typically considered to be non-magnetic or possessing very weak sub-G magnetic fields. This view has been repeatedly challenged in the literature, most commonly for the bright hot Am star o Peg. Several studies
Externí odkaz:
http://arxiv.org/abs/2405.12778
Autor:
Díaz, Luisa F. Rodríguez, Lagae, Cis, Amarsi, Anish M., Bigot, Lionel, Zhou, Yixiao, Børsen-Koch, Víctor Aguirre, Lind, Karin, Trampedach, Regner, Collet, Remo
Publikováno v:
A&A 688, A212 (2024)
Context: Traditional one-dimensional (1D) hydrostatic model atmospheres introduce systematic modelling errors into spectroscopic analyses of FGK-type stars. Aims: We present an updated version of the STAGGER-grid of 3D model atmospheres, and explore
Externí odkaz:
http://arxiv.org/abs/2405.07872
Autor:
Skúladóttir, Ása, Koutsouridou, Ioanna, Vanni, Irene, Amarsi, Anish M., Lucchesi, Romain, Salvadori, Stefania, Aguado, David
The first (Pop III) stars formed only out of H and He and were likely more massive than present-day stars. Massive Pop III stars in the range 140-260 M$_\odot$ are predicted to end their lives as pair-instability supernovae (PISNe), enriching the env
Externí odkaz:
http://arxiv.org/abs/2404.19086
Deep imaging of galaxy cluster fields have in recent years revealed tens of candidates for gravitationally lensed stars at redshifts $z\approx$ 1-6, and future searches are expected to reveal highly magnified stars from even earlier epochs. Multi-ban
Externí odkaz:
http://arxiv.org/abs/2404.10817
Autor:
Buldgen, G., Noels, A., Scuflaire, R., Amarsi, A. M., Grevesse, N., Eggenberger, P., Colgan, J., Fontes, C. J., Baturin, V. A., Oreshina, A. V., Ayukov, S. V., Hakel, P., Kilcrease, D. P.
Due to the high quality constraints available for the Sun, we can carry out combined analyses using neutrino, spectroscopic and helioseismic observations. Such studies lay the ground for future improvements of key physical components of solar and ste
Externí odkaz:
http://arxiv.org/abs/2404.10478