Zobrazeno 1 - 10
of 83
pro vyhledávání: '"Viani, Lucas"'
Autor:
Lund, Mikkel N., Basu, Sarbani, Bieryla, Allyson, Casagrande, Luca, Huber, Daniel, Hekker, Saskia, Viani, Lucas, Davies, Guy R., Campante, Tiago L., Chaplin, William J., Serenelli, Aldo M., Ong, J. M. Joel, Ball, Warrick H., Stokholm, Amalie, Bellinger, Earl P., Bazot, Michaël, Stello, Dennis, Latham, David W., White, Timothy R., Sayeed, Maryum, Børsen-Koch, Víctor Aguirre, Chontos, Ashley
The KEYSTONE project aims to enhance our understanding of solar-like oscillators by delivering a catalogue of global asteroseismic parameters (${\Delta\nu}$ and ${\nu_{\rm max}}$) for 173 stars, comprising mainly dwarfs and subgiants, observed by the
Externí odkaz:
http://arxiv.org/abs/2405.15919
Autor:
Ong, J. M. Joel, Basu, Sarbani, Lund, Mikkel N., Bieryla, Allyson, Viani, Lucas S., Latham, David W.
Models of solar-like oscillators yield acoustic modes at different frequencies than would be seen in actual stars possessing identical interior structure, due to modelling error near the surface. This asteroseismic "surface term" must be corrected wh
Externí odkaz:
http://arxiv.org/abs/2108.07370
Autor:
Viani, Lucas
O objetivo desta dissertação é estudar os efeitos estruturais e eletrônicos em fulerenos menores e C60 causados pela dopagem substitucional com boro e nitrogênio para aplicações em eletrônica molecular. Estudamos as propriedades eletrônicas
Autor:
Viani, Lucas S., Basu, Sarbani
Core overshoot is a large source of uncertainty in constructing stellar models. Whether the amount of overshoot is constant or mass dependent is not completely known, even though models sometimes assume a mass-based trend. In this work we use asteros
Externí odkaz:
http://arxiv.org/abs/2009.09344
Autor:
Howe, Rachel, Chaplin, William J., Basu, Sarbani, Ball, Warrick H., Davies, Guy R., Elsworth, Yvonne, Hale, Steven J., Miglio, Andrea, Nielsen, Martin Bo, Viani, Lucas S.
The frequency, $\nu_{\rm max}$, at which the envelope of pulsation power peaks for solar-like oscillators is an important quantity in asteroseismology. We measure $\nu_{\rm max}$ for the Sun using 25 years of Sun-as-a-Star Doppler velocity observatio
Externí odkaz:
http://arxiv.org/abs/2001.10949
Asteroseismology of solar-like oscillators often relies on the comparisons between stellar models and stellar observations in order to determine the properties of stars. The values of the global seismic parameters, $\nu_\mathrm{max}$ (the frequency w
Externí odkaz:
http://arxiv.org/abs/1905.08333
Stellar models typically use the mixing length approximation as a way to implement convection in a simplified manner. While conventionally the value of the mixing length parameter, $\alpha$, used is the solar calibrated value, many studies have shown
Externí odkaz:
http://arxiv.org/abs/1803.05924
Autor:
Viani, Lucas S., Basu, Sarbani
We create isochrones of M67 using the Yale Rotating Stellar Evolution Code. In addition to metallicity, parameters that are traditionally held fixed, such as the mixing length parameter and initial helium abundance, also vary. The amount of convectiv
Externí odkaz:
http://arxiv.org/abs/1705.06761
The scaling relations that relate the average asteroseismic parameters $\Delta \nu$ and $\nu_{\max}$ to the global properties of stars are used quite extensively to determine stellar properties. While the $\Delta \nu$ scaling relation has been examin
Externí odkaz:
http://arxiv.org/abs/1705.03472
Autor:
Lund, Mikkel N., Basu, Sarbani, Aguirre, Víctor Silva, Chaplin, William J., Serenelli, Aldo M., García, Rafael A., Latham, David W., Casagrande, Luca, Bieryla, Allyson, Davies, Guy R., Viani, Lucas S., Buchhave, Lars A., Miglio, Andrea, Soderblom, David R., Valenti, Jeff A., Stefanik, Robert P., Handberg, Rasmus
The Hyades open cluster was targeted during Campaign 4 (C4) of the NASA K2 mission, and short-cadence data were collected on a number of cool main-sequence stars. Here, we report results on two F-type stars that show detectable oscillations of a qual
Externí odkaz:
http://arxiv.org/abs/1608.07290