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211 papers · 1 filter
Halo Concentrations and the Fundamental Plane of Galaxy Clusters
Yutaka Fujita, Megan Donahue, Stefano Ettori +6
According to the standard cold dark matter (CDM) cosmology, the structure of dark halos including those of galaxy clusters reflects their mass accretion history. Older clusters ten…
Braid group and leveling of a knot
Sangbum Cho, Yuya Koda, Arim Seo
Any knot in genus- -bridge position can be moved by isotopy to lie in a union of parallel tori tubed by tubes so that intersects each tube in two spanning a…
Jacobian-free algorithm to calculate the phase sensitivity function in the phase reduction theory and its applications to Kármán's vortex street
Makoto Iima
Phase reduction theory has been applied to many systems with limit cycles; however, it has limited applications in incompressible fluid systems. This is because the calculation of…
Irregular parameter dependence of numerical results in tensor renormalization group analysis
Daisuke Kadoh, Yoshinobu Kuramashi, Ryoichiro Ueno
We study the parameter dependence of numerical results obtained by the tensor renormalization group. We often observe an irregular behavior as the parameters are varied with the me…
Disk surgery and the primitive disk complexes of the -sphere
Sangbum Cho, Yuya Koda, Jung Hoon Lee
Given a genus- Heegaard splitting of the -sphere with , we show that the primitive disk complex for the splitting is not weakly closed under disk surgery operation.…
Accretion geometry of the black-hole binary Cygnus X-1 from X-ray polarimetry
M. Chauvin, H. -G. Florén, M. Friis +13
Black-hole binary (BHB) systems comprise a stellar-mass black hole and a closely orbiting companion star. Matter is transferred from the companion to the black hole, forming an acc…