70 citations · 222 across the 13 of their papers we have counts for
13 papers
Consistency tests between SDSS and DESI BAO measurements
Basundhara Ghosh, Carlos Bengaly
In this work, we investigate whether the baryon acoustic oscillation (BAO) measurements from redshift surveys, like the Sloan Digital Sky Survey (SDSS), and the Dark Energy Spectro…
A unified linear intrinsic alignment model for elliptical and disc galaxies and the resulting ellipticity spectra
Basundhara Ghosh, Kai Nussbaumer, Eileen Sophie Giesel +1
Alignments of spiral galaxies were thought to result from tidal torquing, where tidal field of the cosmic large-scale structure exert torquing moments onto dark matter haloes, dete…
Towards a possible solution to the Hubble tension with Horndeski gravity
Yashi Tiwari, Basundhara Ghosh, Rajeev Kumar Jain
The Hubble tension refers to the discrepancy in the value of the Hubble constant inferred from the cosmic microwave background observations, assuming the concordance CDM m…
Etherington duality breaking: gravitational lensing in non-metric spacetimes versus intrinsic alignments
Eileen Sophie Giesel, Basundhara Ghosh, Björn Malte Schäfer
The Etherington distance duality relation is well-established for metric theories of gravity, and confirms the duality between the luminosity distance and the angular diameter dist…
Invariance of cosmological number counts under disformal transformations
Basundhara Ghosh, Jérémie Francfort, Rajeev Kumar Jain
We investigate whether true physical observables associated with the measurements of large scale structure in the universe are frame-independent. In particular, we study if cosmolo…
Can breakdown of perturbation in the -attractor inflation lead to PBH formation?
Chitrak Sarkar, Arunoday Sarkar, Basundhara Ghosh +1
With the basic -attractor potentials, we investigate an inflationary regime in the high- limit, where the cosmological perturbation breaks down due to large enhancement in th…
Intrinsic and extrinsic gravitational flexions
Eileen Sophie Giesel, Basundhara Ghosh, Bjoern Malte Schaefer
The topic of this paper is a generalisation of the linear model for intrinsic alignments of galaxies to intrinsic flexions: In this model, third moments of the brightness distribut…
Intrinsic and extrinsic correlations of galaxy shapes and sizes in weak lensing data
Basundhara Ghosh, Ruth Durrer, Bjoern Malte Schaefer
The subject of this paper is to build a physical model describing shape and size correlations of galaxies due to weak gravitational lensing and due to direct tidal interaction of e…
Non-linear contributions to angular power spectra
Mona Jalilvand, Basundhara Ghosh, Elisabetta Majerotto +3
Future galaxy clustering surveys will probe small scales where non-linearities become important. Since the number of modes accessible on intermediate to small scales is very high,…
Cosmological Number Counts in Einstein and Jordan frames
Jérémie Francfort, Basundhara Ghosh, Ruth Durrer
Even though we know that physical observations are frame independent, the frame dependence of cosmological perturbations is relatively subtle and has led to confusion in the past.…
The observable statistics
Basundhara Ghosh, Ruth Durrer
Recently Moradinezhad Dizgah & Durrer have shown that the statistics, useful to test theories of modified gravity, is plagued by additional scale and bias dependent lensing c…
General Relativistic corrections in density-shear correlations
Basundhara Ghosh, Ruth Durrer, Elena Sellentin
We investigate the corrections which relativistic light-cone computations induce on the correlation of the tangential shear with galaxy number counts, also known as galaxy-galaxy l…
The full-sky relativistic correlation function and power spectrum of galaxy number counts: I. Theoretical aspects
Vittorio Tansella, Camille Bonvin, Ruth Durrer +2
We derive an exact expression for the correlation function in redshift shells including all the relativistic contributions. This expression, which does not rely on the distant-obse…