Search Results - "Nikakhtar, Farnik"

Data-driven reconstruction of stochastic dynamical equations based on statistical moments by Nikakhtar, Farnik, Parkavousi, Laya, Sahimi, Muhammad, Reza Rahimi Tabar, M, Feudel, Ulrike, Lehnertz, Klaus

“…Stochastic processes are encountered in many contexts, ranging from generation sizes of bacterial colonies and service times in a queueing system to…”
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Building an Acceleration Ladder with Tidal Streams and Pulsar Timing by Craig, Peter, Chakrabarti, Sukanya, Sanderson, Robyn E., Nikakhtar, Farnik

“…We analyse stellar streams in action-angle coordinates combined with recent local direct acceleration measurements to provide joint constraints on the…”
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Optimal Transport Reconstruction of Baryon Acoustic Oscillations by Nikakhtar, Farnik, Sheth, Ravi K, Lévy, Bruno, Mohayaee, Roya

“…A weighted, semidiscrete, fast optimal transport (OT) algorithm for reconstructing the Lagrangian positions of protohalos from their evolved Eulerian positions…”
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Revealing Higher-Order Interactions in High-Dimensional Complex Systems: A Data-Driven Approach by Tabar, M. Reza Rahimi, Nikakhtar, Farnik, Parkavousi, Laya, Akhshi, Amin, Feudel, Ulrike, Lehnertz, Klaus

“…Natural and manmade complex systems are comprised of different elementary units, being either system components or diverse subsystems as in the case of…”
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Public Data Release of the FIRE-2 Cosmological Zoom-in Simulations of Galaxy Formation by Wetzel, Andrew, Hayward, Christopher C., Sanderson, Robyn E., Ma, Xiangcheng, Anglés-Alcázar, Daniel, Feldmann, Robert, Chan, T. K, El-Badry, Kareem, Wheeler, Coral, Garrison-Kimmel, Shea, Nikakhtar, Farnik, Panithanpaisal, Nondh, Arora, Arpit, Gurvich, Alexander B., Samuel, Jenna, Sameie, Omid, Pandya, Viraj, Hafen, Zachary, Hummels, Cameron, Loebman, Sarah, Boylan-Kolchin, Michael, Bullock, James S., Faucher-Giguère, Claude-André, Kereš, Dušan, Quataert, Eliot, Hopkins, Philip F.

“…We describe a public data release of the FIRE-2 cosmological zoom-in simulations of galaxy formation (available at http://flathub.flatironinstitute.org/fire )…”
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Probing the Dark Universe from Galactic to Cosmological Scales by Nikakhtar, Farnik

“…Astronomical observations strongly suggest that the universe is mostly dark. Its two dominant components, dark energy and dark matter, remain among the most…”
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limHaloPT: A Numerical Package for Accurate Modeling of Line Intensity Power Spectrum by Moradinezhad Dizgah, Azadeh, Vallinotto, Alberto, Nikakhtar, Farnik

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The Excursion set approach: Stratonovich approximation and Cholesky decomposition by Nikakhtar, Farnik, Ayromlou, Mohammadreza, Baghram, Shant, Rahvar, Sohrab, Rahimi Tabar, M Reza, Sheth, Ravi K

“…ABSTRACT The excursion set approach is a framework for estimating how the number density of non-linear structures in the cosmic web depends on the expansion…”
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New Families in our Solar Neighborhood: Applying Gaussian Mixture Models for Objective Classification of Structures in the Milky Way and in Simulations by Nikakhtar, Farnik, Sanderson, Robyn E., Wetzel, Andrew, Loebman, Sarah, Sharma, Sanjib, Beaton, Rachael, Mackereth, J. Ted, Poovelil, Vijith Jacob, Zasowski, Gail, Bonaca, Ana, Martell, Sarah, Jönsson, Henrik, Faucher-Giguère, Claude-André

“…The standard picture of galaxy formation motivates the decomposition of the Milky Way into 3–4 stellar populations with distinct kinematic and elemental…”
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Generating synthetic star catalogs from simulated data for next-gen observatories with py-ananke by Thob, Adrien C. R., Sanderson, Robyn E., Eden, Andrew P., Nikakhtar, Farnik, Panithanpaisal, Nondh, Garavito-Camargo, Nicolás, Sharma, Sanjib

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Leveraging protohalos and scale-dependent bias to calibrate the BAO scale in real space by Gaines, Sasha, Nikakhtar, Farnik, Padmanabhan, Nikhil, Sheth, Ravi K

“…The location of the baryon acoustic oscillation (BAO) feature in the two-point correlation function (2PCF) of matter produces a standard ruler that is useful…”
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Eigen-decomposition of Covariance matrices: An application to the BAO Linear Point by Lee, Jaemyoung Jason, Nikakhtar, Farnik, Paranjape, Aseem, Sheth, Ravi K

“…The Baryon Acoustic Oscillation (BAO) feature in the two-point correlation function (TPCF) of discrete tracers such as galaxies is an accurate standard ruler…”
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The Stability of the BAO Linear Point under Modified Gravity by Lee, Jaemyoung Jason, Fiorini, Bartolomeo, Nikakhtar, Farnik, Sheth, Ravi K

“…Baryon Acoustic Oscillations (BAOs) are crucial in cosmological analysis, providing a standard ruler, as well as constraints on dark energy. In General…”
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The smearing scale in Laguerre reconstructions of the correlation function by Nikakhtar, Farnik, Sheth, Ravi K, Zehavi, Idit

“…To a good approximation, on large cosmological scales the evolved two-point correlation function of biased tracers is related to the initial one by a…”
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Building an Acceleration Ladder with Tidal Streams and Pulsar Timing by Craig, Peter, Chakrabarti, Sukanya, Sanderson, Robyn E, Nikakhtar, Farnik

“…We analyze stellar streams in action-angle coordinates combined with recent local direct acceleration measurements to provide joint constraints on the…”
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Laguerre reconstruction of the BAO feature in halo-based mock galaxy catalogues by Nikakhtar, Farnik, Sheth, Ravi K, Zehavi, Idit

“…Phys. Rev. D 104, 063504 (2021) Fitting half-integer generalized Laguerre functions to the evolved, real-space dark matter and halo correlation functions…”
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Laguerre reconstruction of the correlation function on Baryon Acoustic Oscillation scales by Nikakhtar, Farnik, Sheth, Ravi K, Zehavi, Idit

“…Phys. Rev. D 104, 043530 (2021) The baryon acoustic oscillation feature can be used as a standard cosmological ruler. In practice, for sub-percent level…”
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Optimal Transport Reconstruction of Baryon Acoustic Oscillations by Nikakhtar, Farnik, Sheth, Ravi K, Lévy, Bruno, Mohayaee, Roya

“…A weighted, semi-discrete, fast optimal transport (OT) algorithm for reconstructing the Lagrangian positions of proto-halos from their evolved Eulerian…”
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Matrix Formalism of Excursion Set Theory: A new approach to statistics of dark matter halo counting by Nikakhtar, Farnik, Baghram, Shant

“…Phys. Rev. D 96, 043524 (2017) Excursion set theory (EST) is an analytical framework to study the large-scale structure of the Universe. EST introduces a…”
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Displacement Field Analysis via Optimal Transport: Multi-Tracer Approach to Cosmological Reconstruction by Nikakhtar, Farnik, Sheth, Ravi K, Padmanabhan, Nikhil, Lévy, Bruno, Mohayaee, Roya

“…We demonstrate the effectiveness of one of the many multi-tracer analyses enabled by Optimal Transport (OT) reconstruction. Leveraging a semi-discrete OT…”
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