Zobrazeno 1 - 10
of 6 277
pro vyhledávání: '"Ball, A. H"'
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:
Bhalotia, Vanshree, Huber, Daniel, van Saders, Jennifer L., Metcalfe, Travis S., Stassun, Keivan G., White, Timothy R., Børsen-Koch, Víctor Aguirre, Ball, Warrick H., Basu, Sarbani, Serenelli, Aldo M., Sawczynec, Erica, Guzik, Joyce A., Howard, Andrew W., Isaacson, Howard
Stellar spin down is a critical yet poorly understood component of stellar evolution. In particular, results from the Kepler Mission imply that mature age, solar-type stars have inefficient magnetic braking, resulting in a stalled spin down rate. How
Externí odkaz:
http://arxiv.org/abs/2405.12362
Autor:
Bellinger, Earl P., Caplan, Matt E., Ryu, Taeho, Bollimpalli, Deepika, Ball, Warrick H., Kühnel, Florian, Farmer, R., de Mink, S. E., Christensen-Dalsgaard, Jørgen
Hawking (1971) proposed that the Sun may harbor a primordial black hole whose accretion supplies some of the solar luminosity. Such an object would have formed within the first 1 s after the Big Bang with the mass of a moon or an asteroid. These ligh
Externí odkaz:
http://arxiv.org/abs/2312.06782
Autor:
Saunders, Nicholas, van Saders, Jennifer L., Lyttle, Alexander J., Metcalfe, Travis S., Li, Tanda, Davies, Guy R., Hall, Oliver J., Ball, Warrick H., Townsend, Richard, Creevey, Orlagh, Dodds, Curt
Despite a growing sample of precisely measured stellar rotation periods and ages, the strength of magnetic braking and the degree of departure from standard (Skumanich-like) spindown have remained persistent questions, particularly for stars more evo
Externí odkaz:
http://arxiv.org/abs/2309.05666
Publikováno v:
Res. Notes AAS 7, 164 (2023)
The launch of NASA's Kepler space telescope in 2009 revolutionized the quality and quantity of observational data available for asteroseismic analysis. While Kepler was able to detect solar-like oscillations in hundreds of main-sequence and subgiant
Externí odkaz:
http://arxiv.org/abs/2307.16247
Autor:
Ball, Warrick H.
Publikováno v:
A&G, 64, 2.30 (2023)
Warrick Ball highlights some recent discoveries in the context of the past, present and future of asteroseismology.
Comment: Author-produced version of article accepted in Astronomy & Geophysics
Comment: Author-produced version of article accepted in Astronomy & Geophysics
Externí odkaz:
http://arxiv.org/abs/2306.15070
Autor:
Nielsen, M. B., Davies, G. R., Chaplin, W. J., Ball, W. H, Ong, J. M. J., Hatt, E., Jones, B. P., Logue, M.
Publikováno v:
A&A 676, A117 (2023)
The asteroseismic analysis of stellar power density spectra is often computationally expensive. The models used in the analysis may use several dozen parameters to accurately describe features in the spectra caused by oscillation modes and surface gr
Externí odkaz:
http://arxiv.org/abs/2306.13577
Autor:
Ball, Warrick H., Triaud, Amaury H. M. J., Hatt, Emily, Nielsen, Martin B., Chaplin, William J.
The angle between the rotation and orbital axes of stars in binary systems -- the obliquity -- is an important indicator of how these systems form and evolve but few such measurements exist. We combine the sample of astrometric orbital inclinations f
Externí odkaz:
http://arxiv.org/abs/2301.10308
Autor:
Hatt, Emily, Nielsen, Martin B., Chaplin, William J., Ball, Warrick H., Davies, Guy R., Bedding, Timothy R., Buzasi, Derek L., Chontos, Ashley, Huber, Daniel, Kayhan, Cenk, Li, Yaguang, White, Timothy R., Cheng, Chen, Metcalfe, Travis S., Stello, Dennis
The Transiting Exoplanet Survey Satellite (TESS) mission has provided photometric light curves for stars across nearly the entire sky. This allows for the application of asteroseismology to a pool of potential solar-like oscillators that is unprecede
Externí odkaz:
http://arxiv.org/abs/2210.09109
Autor:
Jermyn, Adam S., Bauer, Evan B., Schwab, Josiah, Farmer, R., Ball, Warrick H., Bellinger, Earl P., Dotter, Aaron, Joyce, Meridith, Marchant, Pablo, Mombarg, Joey S. G., Wolf, William M., Wong, Tin Long Sunny, Cinquegrana, Giulia C., Farrell, Eoin, Smolec, R., Thoul, Anne, Cantiello, Matteo, Herwig, Falk, Toloza, Odette, Bildsten, Lars, Townsend, Richard H. D., Timmes, F. X.
We update the capabilities of the open-knowledge software instrument Modules for Experiments in Stellar Astrophysics (MESA). The new auto_diff module implements automatic differentiation in MESA, an enabling capability that alleviates the need for ha
Externí odkaz:
http://arxiv.org/abs/2208.03651