Zobrazeno 1 - 8
of 8
pro vyhledávání: '"Uddipan Banik"'
Publikováno v:
The Astrophysical Journal, Vol 952, Iss 1, p 65 (2023)
We develop a linear perturbative formalism to compute the response of an inhomogeneous stellar disk embedded in a nonresponsive dark matter (DM) halo to various perturbations like bars, spiral arms, and encounters with satellite galaxies. Without sel
Externí odkaz:
https://doaj.org/article/14d249f6cbf24cf2a29b700c190286b1
Galactic disks are highly responsive systems that often undergo external perturbations and subsequent collisionless equilibration, predominantly via phase-mixing. We use linear perturbation theory to study the response of infinite isothermal slab ana
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::b4145ebdd36a7b75c682c7456aecaa19
http://arxiv.org/abs/2208.05038
http://arxiv.org/abs/2208.05038
Autor:
Uddipan Banik, Frank C. van den Bosch
We examine the origin of dynamical friction using a non-perturbative, orbit-based approach. Unlike the standard perturbative approach, in which dynamical friction arises from the LBK torque due to pure resonances, this alternative, complementary view
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::80f1012dfcd3fd5f8b77c2dbab03e242
http://arxiv.org/abs/2112.06944
http://arxiv.org/abs/2112.06944
Autor:
Frank C. van den Bosch, Uddipan Banik
Dynamical friction is typically regarded a secular process, in which the subject ('perturber') evolves very slowly (secular approximation), and has been introduced to the host over a long time (adiabatic approximation). These assumptions imply that d
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::2c8e70df1f3d2d5f75e84cdf4b6fbd71
Autor:
Frank C. van den Bosch, Uddipan Banik
Impulsive encounters between astrophysical objects are usually treated using the distant tide approximation (DTA) for which the impact parameter, $b$, is assumed to be significantly larger than the characteristic radii of the subject, $r_{\mathrm{S}}
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::adff91334e6d0870e7fb18af7af1aca9
http://arxiv.org/abs/2010.06632
http://arxiv.org/abs/2010.06632
Autor:
Uddipan Banik, Surhud More, Simona Vegetti, Anupreeta More, Giulia Despali, Frank C. van den Bosch, Michael Tremmel, John McKean
Publikováno v:
Monthly Notices of the Royal Astronomical Society, 483(2), 1558-1573. Oxford University Press
Strong lensing of active galactic nuclei in the radio can result in razor-thin arcs, with a thickness of less than a milli-arcsecond, if observed at the resolution achievable with very long baseline interferometry (VLBI). Such razor-thin arcs provide
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8dff3a27ab36a132631a7b6a9c9d0191
https://doi.org/10.1093/mnras/sty3267
https://doi.org/10.1093/mnras/sty3267
Publikováno v:
Physical Review B. 97
We study an integrable Hamiltonian reducible to free fermions, which is subjected to an imperfect periodic driving with the amplitude of driving (or kicking), randomly chosen from a binary distribution like a coin-toss problem. The randomness present
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_________::f4b6a89edb83387530abc5308ea555be
https://doi.org/10.1103/physrevb.97.184308
https://doi.org/10.1103/physrevb.97.184308
We study gravitational collapse with anisotropic pressures, whose end stage can mimic space-times that are seeded by galactic dark matter. To this end, we identify a class of space-times (with conical defects) that can arise out of such a collapse pr
Externí odkaz:
https://explore.openaire.eu/search/publication?articleId=doi_dedup___::8714e654f2b90fed04474c0da6a393e9
http://arxiv.org/abs/1606.07875
http://arxiv.org/abs/1606.07875