Zobrazeno 1 - 10
of 97
pro vyhledávání: '"Chamandy, Luke"'
We propose that certain white dwarf (WD) planets, such as WD 1856+534 b, may form out of material from a stellar companion that tidally disrupts from common envelope (CE) evolution with the WD progenitor star. The disrupted companion shreds into an a
Externí odkaz:
http://arxiv.org/abs/2407.14190
Autor:
Jose, Charles, Chamandy, Luke, Shukurov, Anvar, Subramanian, Kandaswamy, Rodrigues, Luiz Felippe S., Baugh, Carlton M.
We explore the redshift evolution of the radio luminosity function (RLF) of star-forming galaxies using GALFORM, a semi-analytic model of galaxy formation and a dynamo model of the magnetic field evolving in a galaxy. Assuming energy equipartition be
Externí odkaz:
http://arxiv.org/abs/2402.15099
Galactic dynamo models have generally relied on input parameters that are very challenging to constrain. We address this problem by developing a model that uses observable quantities as input: the galaxy rotation curve, the surface densities of the g
Externí odkaz:
http://arxiv.org/abs/2311.15612
Autor:
Chamandy, Luke, Carroll-Nellenback, Jonathan, Blackman, Eric G., Frank, Adam, Tu, Yisheng, Liu, Baowei, Zou, Yangyuxin, Nordhaus, Jason
We perform 3D hydrodynamical simulations to study recombination and ionization during the common envelope (CE) phase of binary evolution, and develop techniques to track the ionic transitions in time and space. We simulate the interaction of a $2\,M_
Externí odkaz:
http://arxiv.org/abs/2304.14840
It has long been speculated that jet feedback from accretion onto the companion during a common envelope (CE) event could affect the orbital evolution and envelope unbinding process, but this conjecture has heretofore remained largely untested. We pr
Externí odkaz:
http://arxiv.org/abs/2202.05715
Autor:
Guidarelli, Gabriel, Nordhaus, Jason, Carroll-Nellenback, Jonathan, Chamandy, Luke, Blackman, Eric G., Frank, Adam
A significant fraction of isolated white dwarfs host magnetic fields in excess of a MegaGauss. Observations suggest that these fields originate in interacting binary systems where the companion is destroyed thus leaving a singular, highly-magnetized
Externí odkaz:
http://arxiv.org/abs/2105.00077
Many stars harbour multi-planet systems. As these stars expand late in their evolutions, the innermost planet may be engulfed, leading to a common envelope (CE) event. Even if this is insufficient to eject the envelope, it may expand the star further
Externí odkaz:
http://arxiv.org/abs/2011.11106
Autor:
Chamandy, Luke, Shukurov, Anvar
Galactic dynamo models take as input certain parameters of the interstellar turbulence, most essentially the correlation time $\tau$, root-mean-square turbulent speed $u$, and correlation scale $l$. However, these quantities are difficult, or, in the
Externí odkaz:
http://arxiv.org/abs/2007.14159
Common envelope (CE) evolution is a critical but still poorly understood progenitor phase of many high-energy astrophysical phenomena. Although 3D global hydrodynamic CE simulations have become more common in recent years, those involving an asymptot
Externí odkaz:
http://arxiv.org/abs/2004.06829
Synthesizing Observations and Theory to Understand Galactic Magnetic Fields: Progress and Challenges
Constraining dynamo theories of magnetic field origin by observation is indispensable but challenging, in part because the basic quantities measured by observers and predicted by modelers are different. We clarify these differences and sketch out way
Externí odkaz:
http://arxiv.org/abs/1912.08962