Indian Institute of Technology Hyderabad

output

20062026

most citedGW170817: Observation of Gravitational Waves from a Binary Neutron Star Inspiral

9.8k citations

researchers with a paper here

Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.

collaborating institutions

Showing 2021 · astro-ph.COShow all

42 papers · 2 filters

astro-ph.CO2021★ 38 cited

The DES view of the Eridanus supervoid and the CMB Cold Spot

A. Kovács, N. Jeffrey, M. Gatti +119

The Cold Spot is a puzzling large-scale feature in the Cosmic Microwave Background temperature maps and its origin has been subject to active debate. As an important foreground str…

astro-ph.CO2021★ 3 cited

Galaxy cluster hydrostatic bias in Kottler spacetime

Shantanu Desai

We calculate the relativistic corrections to hydrostatic X-ray masses for galaxy clusters in Kottler spacetime, which is the spherically symmetric solution to Einstein's equations…

astro-ph.CO2021★ 26 cited

The Dark Energy Survey Supernova Program: Cosmological biases from supernova photometric classification

M. Vincenzi, M. Sullivan, A. Möller +81

Cosmological analyses of samples of photometrically-identified Type Ia supernovae (SNe Ia) depend on understanding the effects of 'contamination' from core-collapse and peculiar SN…

astro-ph.CO2021★ 247 cited

Constraints on the cosmic expansion history from GWTC-3

The LIGO Scientific Collaboration, the Virgo Collaboration, the KAGRA Collaboration +1676

We use 47 gravitational-wave sources from the Third LIGO-Virgo-KAGRA Gravitational-Wave Transient Catalog (GWTC-3) to estimate the Hubble parameter $H (z)$ , including its current va…

astro-ph.CO2021

Cosmic Shear in Harmonic Space from the Dark Energy Survey Year 1 Data: Compatibility with Configuration Space Results

H. Camacho, F. Andrade-Oliveira, A. Troja +96

We perform a cosmic shear analysis in harmonic space using the first year of data collected by the Dark Energy Survey (DES-Y1). We measure the cosmic weak lensing shear power spect…

astro-ph.CO2021★ 26 cited

A search for the variation of speed of light using galaxy cluster gas mass fraction measurements

I. E. C. R. Mendonça, Kamal Bora, R. F. L. Holanda +2

In this paper, we implement a new method to test the invariance of the speed of light ( $c$ ) as a function of redshift, by combining the measurements of galaxy cluster gas mass frac…

astro-ph.CO2021

Dark Energy Survey Year 3 results: Cosmology with peaks using an emulator approach

D. Zürcher, J. Fluri, R. Sgier +119

We constrain the matter density $Ω_{m}$ and the amplitude of density fluctuations $σ_{8}$ within the $Λ$ CDM cosmological model with shear peak statistics and angular converg…

astro-ph.CO2021★ 15 cited

The DES Bright Arcs Survey: Candidate Strongly Lensed Galaxy Systems from the Dark Energy Survey 5,000 Sq. Deg. Footprint

J. H. O'Donnell, R. D. Wilkinson, H. T. Diehl +79

We report the combined results of eight searches for strong gravitational lens systems in the full 5,000 sq. deg. of Dark Energy Survey (DES) observations. The observations accumul…

astro-ph.CO2021★ 70 cited

Search for subsolar-mass binaries in the first half of Advanced LIGO and Virgo's third observing run

The LIGO Scientific Collaboration, the Virgo Collaboration, the KAGRA Collaboration +1634

We report on a search for compact binary coalescences where at least one binary component has a mass between 0.2 $M_{⊙}$ and 1.0 $M_{⊙}$ in Advanced LIGO and Advanced Virgo dat…

astro-ph.CO2021★ 12 cited

Finding quadruply imaged quasars with machine learning. I. Methods

A. Akhazhanov, A. More, A. Amini +68

Strongly lensed quadruply imaged quasars (quads) are extraordinary objects. They are very rare in the sky -- only a few tens are known to date -- and yet they provide unique inform…

astro-ph.CO2021★ 12 cited

Probing the time variation of fine structure constant using galaxy clusters and quintessence model

Zhi-E Liu, Wen-Fei Liu, Tong-Jie Zhang +2

We explore a possible time variation of the fine structure constant ( $α \equiv e^{2} /ℏ c$ ) using the Sunyaev-Zel'dovich effect measurements of galaxy clusters along with their X-r…

astro-ph.CO2021★ 27 cited

Cross-correlation of DES Y3 lensing and ACT/ $Planck$ thermal Sunyaev Zel'dovich Effect I: Measurements, systematics tests, and feedback model constraints

M. Gatti, S. Pandey, E. Baxter +126

We present a tomographic measurement of the cross-correlation between thermal Sunyaev-Zeldovich (tSZ) maps from $Planck$ and the Atacama Cosmology Telescope (ACT) and weak ga…

astro-ph.CO2021★ 43 cited

Cross-correlation of DES Y3 lensing and ACT/ $Planck$ thermal Sunyaev Zel'dovich Effect II: Modeling and constraints on halo pressure profiles

S. Pandey, M. Gatti, E. Baxter +121

Hot, ionized gas leaves an imprint on the cosmic microwave background via the thermal Sunyaev Zel'dovich (tSZ) effect. The cross-correlation of gravitational lensing (which traces…

astro-ph.CO2021★ 11 cited

A test of Radial Acceleration Relation for the {\it Giles et al Chandra} cluster sample

S. Pradyumna, Shantanu Desai

We carry out a test of the radial acceleration relation (RAR) for a sample of 10 dynamically relaxed and cool-core galaxy clusters imaged by the Chandra X-ray telescope, which was…

astro-ph.CO2021★ 4 cited

Galaxy clusters, cosmic chronometers and the Einstein equivalence principle

I. E. C. R. Mendonça, Kamal Bora, R. F. L. Holanda +1

The Einstein equivalence principle in the electromagnetic sector can be violated in modifications of gravity theory generated by a multiplicative coupling of a scalar field to the…

astro-ph.CO2021★ 16 cited

Velocity Dispersions of Clusters in the Dark Energy Survey Y3 redMaPPer Catalog

V. Wetzell, T. E. Jeltema, B. Hegland +96

We measure the velocity dispersions of clusters of galaxies selected by the redMaPPer algorithm in the first three years of data from the Dark Energy Survey (DES), allowing us to p…

astro-ph.CO2021★ 17 cited

Superclustering with the Atacama Cosmology Telescope and Dark Energy Survey: I. Evidence for thermal energy anisotropy using oriented stacking

M. Lokken, R. Hložek, A. van Engelen +104

The cosmic web contains filamentary structure on a wide range of scales. On the largest scales, superclustering aligns multiple galaxy clusters along inter-cluster bridges, visible…

astro-ph.CO2021★ 1 cited

Dark Energy Survey Year 3 Results: Galaxy Sample for BAO Measurement

A. Carnero Rosell, M. Rodriguez-Monroy, M. Crocce +106

In this paper we present and validate the galaxy sample used for the analysis of the Baryon Acoustic Oscillation signal (BAO) in the Dark Energy Survey (DES) Y3 data. The definitio…

astro-ph.CO2021★ 110 cited

Dark Energy Survey Year 3 Results: A 2.7% measurement of Baryon Acoustic Oscillation distance scale at redshift 0.835

DES Collaboration, T. M. C. Abbott, M. Aguena +108

We present angular diameter measurements obtained by measuring the position of Baryon Acoustic Oscillations (BAO) in an optimised sample of galaxies from the first three years of D…

astro-ph.CO2021★ 16 cited

A test of the standard dark matter density evolution law using galaxy clusters and cosmic chronometers

Kamal Bora, R. F. L. Holanda, Shantanu Desai +1

In this letter, we implement a test of the standard law for the dark matter density evolution. For this purpose, only a flat universe and the validity of the FRW metric are assumed…

astro-ph.CO2021★ 2 cited

Dark Energy Survey Year 3 results: Galaxy-halo connection from galaxy-galaxy lensing

G. Zacharegkas, C. Chang, J. Prat +114

Galaxy-galaxy lensing is a powerful probe of the connection between galaxies and their host dark matter halos, which is important both for galaxy evolution and cosmology. We extend…

astro-ph.CO2021★ 11 cited

A test of constancy of dark matter halo surface density and radial acceleration relation in relaxed galaxy groups

Gopika K, Shantanu Desai

The dark matter halo surface density, given by the product of the dark matter core radius ( $r_{c}$ ) and core density ( $ρ_{c}$ ) has been shown to be a constant for a wide range of isola…