31 citations · 157 across the 15 of their papers we have counts for
15 papers
TESSERA v2: Scaling Pixel-wise Earth Foundation Models
Zhengpeng Feng, Sadiq Jaffer, Ira Shokar +12
Pixel-wise Earth-observation (EO) foundation models are now achieving state-of-the-art performance via generated spatial embeddings. However, how these models scale and how best to…
The angular momentum spiral of the Milky Way disc in Gaia
Rashid Yaaqib, Aneesh P. Naik, Jorge Peñarrubia +1
Data from the Gaia mission shows prominent phase-space spirals that are the signatures of disequilibrium in the Milky Way (MW) disc. In this work, we present a novel perspective on…
lintsampler: Easy random sampling via linear interpolation
Aneesh P. Naik, Michael S. Petersen
'lintsampler' provides a Python implementation of a technique we term 'linear interpolant sampling': an algorithm to efficiently draw pseudo-random samples from an arbitrary probab…
Galactic Compton Wavelengths in Screening Theories
Bradley March, Clare Burrage, Aneesh P. Naik
theories of modified gravity may be compatible with current observations if the deviations from general relativity are sufficiently well screened in dense environments. In r…
First spiral arm detection using dynamical mass measurements of the Milky Way disk
Axel Widmark, Aneesh P. Naik
We apply the vertical Jeans equation to the Milky Way disk, in order to study non-axisymmetric variations in the thin disk surface density. We divide the disk plane into area cells…
Accurate Computation of the Screening of Scalar Fifth Forces in Galaxies
Clare Burrage, Bradley March, Aneesh P. Naik
Screening mechanisms allow light scalar fields to dynamically avoid the constraints that come from our lack of observation of a long-range fifth force. Galactic scale tests are of…
The missing radial velocities of Gaia: a catalogue of Bayesian estimates for DR3
Aneesh P. Naik, Axel Widmark
In an earlier work, we demonstrated the effectiveness of Bayesian neural networks in estimating the missing line-of-sight velocities of Gaia stars, and published an accompanying ca…
Mapping Milky Way disk perturbations in stellar number density and vertical velocity using Gaia DR3
Axel Widmark, Lawrence M. Widrow, Aneesh Naik
We have mapped the number density and mean vertical velocity of the Milky Way's stellar disk out to roughly two kiloparsecs from the Sun using Gaia Data Release 3 (DR3) and complem…
The missing radial velocities of Gaia: blind predictions for DR3
Aneesh Naik, Axel Widmark
While Gaia has observed the phase space coordinates of over a billion stars in the Galaxy, in the overwhelming majority of cases it has only obtained five of the six coordinates, t…
Dark sector domain walls could explain the observed planes of satellites
Aneesh P. Naik, Clare Burrage
The observed `planes of satellites' around the Milky Way and other nearby galaxies are notoriously difficult to explain under the CDM paradigm. Here, we propose an alternative s…
Charting galactic accelerations II: how to 'learn' accelerations in the solar neighbourhood
Aneesh P. Naik, Jin An, Clare Burrage +1
Gravitational acceleration fields can be deduced from the collisionless Boltzmann equation, once the distribution function is known. This can be constructed via the method of norma…
Charting Galactic Accelerations: When and How to Extract a Unique Potential from the Distribution Function
J. An, A. Naik, N. W. Evans +1
The advent of datasets of stars in the Milky Way with six-dimensional phase-space information makes it possible to construct empirically the distribution function (DF). Here, we sh…
Stellar Streams in Chameleon Gravity
A. P. Naik, N. W. Evans, E. Puchwein +2
Theories of gravity that incorporate new scalar degrees of freedom typically require screening mechanisms to ensure consistency with Solar System tests. One widely-studied mechanis…
Constraints on Chameleon f(R)-Gravity from Galaxy Rotation Curves of the SPARC Sample
Aneesh P. Naik, Ewald Puchwein, Anne-Christine Davis +2
In chameleon -gravity, the fifth force will lead to `upturns' in galaxy rotation curves near the screening radius. The location of the upturn depends on the cosmic background…
Imprints of Chameleon f(R) Gravity on Galaxy Rotation Curves
Aneesh P. Naik, Ewald Puchwein, Anne-Christine Davis +1
Current constraints on gravity are relatively weak on galactic and intergalactic scales. Screened modified gravity models can exhibit complex behaviour there without violating stri…